SUN HYDRAULICS CORP
10-Q, 1998-05-15
MISCELLANEOUS FABRICATED METAL PRODUCTS
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<PAGE>   1

                                UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C.  20549

                                  FORM 10-Q

           QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                        SECURITIES EXCHANGE ACT OF 1934


<TABLE>
<S>                                                   <C>
For the quarterly period ended March 31, 1998         Commission file number 0-21835

</TABLE>


                         SUN HYDRAULICS CORPORATION
- --------------------------------------------------------------------------------
           (Exact Name of Registration as Specified in its Charter)


                   FLORIDA                                      59-2754337
            ------------------------                      ----------------------
          (State or Other Jurisdiction of                    (I.R.S. Employer
           Incorporation or Organization)                  Identification No.)

            1500 WEST UNIVERSITY PARKWAY
                SARASOTA, FLORIDA                                34243 
          -------------------------------                    ---------------
    (Address of Principal Executive Offices)                   (Zip Code)

                                  941/362-1200  
- --------------------------------------------------------------------------------
             (Registrant's Telephone Number, Including Area Code)

    Indicate by check mark whether the Registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
Registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  Yes [ X ]  No [   ]

    The Registrant had 6,345,922 shares of common stock, par value $.001,
outstanding as of May 11, 1998.
<PAGE>   2

                           Sun Hydraulics Corporation
                                     INDEX
                   For the first quarter ended March 31, 1998

<TABLE>
<CAPTION>
                                                                                          Page  
                                                                                         -------
<S>                                                                                         <C>  
PART I.  FINANCIAL INFORMATION

    Item 1.      Financial Statements

         Consolidated Balance Sheets as of March 31, 1998 (unaudited)
             and December 31, 1997                                                            3

         Consolidated Statements of Income for the
             Three Months Ended March 31, 1998 and 1997 (unaudited)                           4

         Consolidated Statement of Changes in Shareholders' Equity for the
             Three Months Ended March 31, 1998 (unaudited) and the Year
             Ended December 31, 1997                                                          5

         Consolidated Statements of Cash Flows
             for the Three Months Ended March 31, 1998 and 1997 (unaudited)                   6

         Notes to Consolidated Financial Statements                                           7

    Item 2.      Management's Discussion and Analysis of
                 Financial Condition and Results of Operations                               11

                 Forward Looking Information                                                 14

PART II.     OTHER INFORMATION                                                               16

    Item 1.      Legal Proceedings

    Item 2.      Changes in Securities

    Item 3.      Defaults Upon Senior Securities

    Item 4.      Submission of Matters to a Vote of Security Holders

    Item 5.      Other Information

    Item 6.      Exhibits and Reports on Form 8-K
                                                 
</TABLE>



                                      2

<PAGE>   3

                         PART I:  FINANCIAL INFORMATION
                                        Item 1.

SUN HYDRAULICS CORPORATION
CONSOLIDATED BALANCE SHEETS
(IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                MARCH 31,       DECEMBER 31,
                                                                  1998             1997
                                                              (UNAUDITED)
<S>                                                          <C>               <C>              
                          ASSETS
Current assets:
   Cash and cash equivalents                                 $      2,967      $      1,249
   Accounts receivable, net of allowance for
     doubtful accounts of $44 and $47                               6,175             4,558
   Inventories                                                      6,503             6,775
   Other current assets                                               732               932
                                                             ------------      ------------

        Total current assets                                       16,377            13,514

Property, plant and equipment, net                                 40,183            39,789
Other assets                                                          113                86
                                                             ------------      ------------

        Total assets                                         $     56,673      $     53,389
                                                             ============      ============

            LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
   Accounts payable                                          $      3,130      $      2,847
   Accrued expenses and other liabilities                           2,039             2,174
   Long-term debt due within one year                               1,837             1,035
   Notes payable to related parties due within one year               785               757
   Dividends payable                                                  253               221
   Income taxes payable                                             1,245               380
                                                             ------------      ------------

        Total current liabilities                                   9,289             7,414

Long-term debt due after one year                                   6,688             6,620
Notes payable to related parties due after one year                   945             1,152
Deferred income taxes                                               3,213             3,203
                                                             ------------      ------------

        Total liabilities                                          20,135            18,389
                                                             ------------      ------------

Commitments and contingencies

Shareholders' equity:                                        
   Preferred stock                                                      -                 -   
   Common stock (Note 3)                                                6                 6
   Capital in excess of par value                                  24,175            24,163
   Retained earnings                                               12,119            10,732
   Equity adjustment for foreign currency translation                 238                99
                                                             ------------      ------------

        Total shareholders' equity                                 36,538            35,000
                                                             ------------      ------------

        Total liabilities and shareholders' equity           $     56,673      $     53,389
                                                             ============      ============

</TABLE>
        The accompanying Notes to the Consolidated Financial Statements
              are an integral part of these financial statements.






                                      3
<PAGE>   4

SUN HYDRAULICS CORPORATION
CONSOLIDATED STATEMENTS OF INCOME
(IN THOUSANDS, EXCEPT PER SHARE DATA)


<TABLE>
<CAPTION>
                                                              THREE MONTHS ENDED
                                                                   MARCH 31,
                                                                  (UNAUDITED)
                                                            1998               1997
                                                            ----               ----
<S>                                                <C>                  <C>                 
NET SALES                                          $        19,133      $      14,599

Cost of sales                                               13,347             10,202
                                                   ---------------      --------------

GROSS PROFIT                                                 5,786              4,397

Selling, engineering and
 administrative expenses                                     3,014              2,717
                                                   ---------------      -------------

OPERATING INCOME                                             2,772              1,680

Interest expense                                               260                152
Miscellaneous expense (income)                                  43                (58)
                                                   ---------------      -------------

INCOME BEFORE INCOME TAXES                                   2,469              1,586

Income tax provision                                           829                568
                                                   ---------------      -------------

NET INCOME                                         $         1,640      $       1,018
                                                   ===============      =============

BASIC NET INCOME PER COMMON SHARE                  $          0.26      $        0.16

WEIGHTED AVERAGE SHARES OUTSTANDING                          6,325              6,300

DILUTED NET INCOME PER COMMON SHARE                $          0.25      $        0.16

WEIGHTED AVERAGE SHARES OUTSTANDING                          6,499              6,514


</TABLE>
        The accompanying Notes to the Consolidated Financial Statements
              are an integral part of these financial statements.



                                      4

<PAGE>   5

SUN HYDRAULICS CORPORATION
CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY
(IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                               EQUITY
                                                                                             ADJUSTMENT
                                                                    CAPITAL IN               FOR FOREIGN
                                                     COMMON          EXCESS OF     RETAINED    CURRENCY
                                       SHARES         STOCK          PAR VALUE     EARNINGS  TRANSLATION     TOTAL
<S>                                   <C>            <C>          <C>              <C>         <C>         <C>
Balance, December 31, 1996            4,000,002      $   2,179    $      2,719     $ 17,450    $     49    $  22,397

Net proceeds from stock offering      2,300,000              2          19,250                                19,252
Distributions to shareholders                                                       (10,545)                 (10,545)
Dividends declared                                                                     (883)                    (883)
Net income                                                                            4,710                    4,710
Merger with Sun Holdings (Note 2)                       (2,175)          2,123                                   (52)
Exercise of stock options                22,000                             71                                    71
Adjustment for foreign
 currency translation                                                                                50           50
                                      ---------      ---------    ------------     --------    --------    ---------

Balance, December 31, 1997            6,322,002              6          24,163       10,732          99       35,000

Dividends declared                                                                     (253)                    (253)
Net income                                                                            1,640                    1,640
Exercise of stock options                 3,920                             12                                    12
Adjustment for foreign
 currency translation                                                                               139          139
                                      ---------      ---------    ------------     --------    --------    ---------

Balance, March 31, 1998 (unaudited)   6,325,922      $       6    $     24,175     $ 12,119    $    238    $  36,538
                                      =========      =========    ============     ========    ========    =========


</TABLE>
        The accompanying Notes to the Consolidated Financial Statements
              are an integral part of these financial statements.



                                      5
<PAGE>   6

SUN HYDRAULICS CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS 
(IN THOUSANDS)

<TABLE>
<CAPTION>
                                                            THREE MONTHS ENDED
                                                                 MARCH 31,
                                                                (UNAUDITED)
                                                            1998             1997
                                                            ----             ----
<S>                                                    <C>              <C>
Cash flows from operating activities:
   Net income                                          $   1,640        $   1,018
Adjustments to reconcile net income to 
   net cash provided by operating activities:
   Depreciation                                            1,127              990
   (Increase) decrease in:
     Accounts receivable                                  (1,617)          (1,368)
     Inventories                                             272             (284)
     Income tax receivable, net                                -              344
     Other current assets                                    200            1,034
     Other assets                                            (27)               -
   Increase (decrease) in:
     Accounts payable                                        283             (977)
     Accrued expenses and other liabilities                 (135)            (105)
     Income taxes payable, net                               875            1,054
     Other liabilities                                         -              (14)
                                                       ---------        ---------
       Net cash provided by operating activities           2,618            1,692
                                                       ---------        ---------

Cash flows from investing activities:
  Capital expenditures                                    (1,521)          (2,253)
  Proceeds from dispositions of equipment                      -                2
                                                       ---------        ----------
       Net cash used in investing activities              (1,521)          (2,251)
                                                       ---------        ---------

Cash flows from financing activities:
  Proceeds from debt                                       2,182            1,610
  Repayment of debt                                       (1,312)          (8,560)
  Repayment of notes payable to related parties             (179)            (155)
  Proceeds from exercise of stock options                     12                -
  Net proceeds from stock offering (Note 3)                    -           19,252
  Cash paid for Sun Holdings merger (Note 3)                   -              (52)
  Dividends to shareholders                                 (221)               -
  Distributions to shareholders                                            (9,954)
                                                       ---------        ---------
       Net cash provided by financing activities             482            2,141
                                                       ---------        ---------

Adjustment for foreign currency translation                  139              (63)
                                                       ---------        ---------
Net increase in cash and cash equivalents                  1,718            1,519
Cash and cash equivalents, beginning of period             1,249            1,038
                                                       ---------        ---------
Cash and cash equivalents, end of period               $   2,967        $   2,557
                                                       =========        =========

Supplemental disclosure of cash flow information:
  Cash paid (received) for:
Interest (including amounts capitalized)               $     265        $     400
                                                       =========        =========
Income taxes                                           $     (46)       $    (291)
                                                       =========        =========

</TABLE>
   The accompanying Notes to the Consolidated Financial Statements are an
                 integral part of these financial statements.




                                       6
<PAGE>   7

                          SUN HYDRAULICS CORPORATION
                NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS
                     (in thousands except per share data)

1.  INTERIM CONSOLIDATED FINANCIAL STATEMENTS

    The accompanying unaudited interim consolidated financial statements have
been prepared pursuant to the rules and regulations of the Securities and
Exchange Commission for reporting on Form 10-Q.  Accordingly, certain
information and footnotes required by generally accepted accounting principles
for complete financial statements are not included herein.  The financial
statements are prepared on a consistent basis (including normal recurring
adjustments) and should be read in conjunction with the consolidated financial
statements and related notes contained in the Annual Report on Form 10-K for
the fiscal year ended December 31, 1997, filed by Sun Hydraulics Corporation
(the "Company") with the Securities and Exchange Commission on March 30, 1998.

2.  BUSINESS

    Sun Hydraulics Corporation and its wholly-owned subsidiary design,
manufacture and sell screw-in cartridge valves and manifolds used in hydraulic
systems.  The Company has facilities in the United States, the United Kingdom
and Germany.  Sun Hydraulics Corporation ("Sun Hydraulics"), located in
Sarasota, Florida, designs, manufactures and sells through independent
distributors in the United States.  Sun Hydraulik Holdings Limited ("Sun
Holdings"), a wholly-owned subsidiary of the Company, was formed to provide a
holding company vehicle for the European market operations.  Its wholly-owned
subsidiaries are Sun Hydraulics Limited (a British corporation, "Sun Ltd.") and
Sun Hydraulik GmbH (a German corporation, "GmbH").  Sun Ltd. was originally
formed in 1985 and operates a manufacturing and distribution facility located
in Coventry, England.  GmbH was incorporated on January 1, 1991, to market the
Company's products in German-speaking European markets.

3.  REORGANIZATION AND INITIAL PUBLIC OFFERING

    The consolidated financial statements of the Company consist of the
financial position and results of operations of Sun Hydraulics and Sun
Holdings. In January 1997, Sun Hydraulics effected a 9.90372627 for 1 stock
split.  All prior year share amounts reflected in the financial statements
include the effect of the stock split.  Additionally, Sun Hydraulics issued
374,811 shares of common stock and made a nominal cash payment of $52 in
exchange for all of the issued and outstanding stock of Sun Holdings (the
"Reorganization").  The Reorganization was accounted for in a manner similar to
a pooling of interest except for shares held by the minority shareholders which
were accounted for at the fair market value of their proportionate share of
related assets and liabilities, which approximated book value on the date of
the transaction.

    The Company filed a Registration Statement on Form S-1 with the Securities
and Exchange Commission effective January 9, 1997, and issued 2,300,000 shares
of common stock in an initial public offering ("IPO"), with an initial offering
price of $9.50.  The IPO net proceeds of 




                                      7

<PAGE>   8

$19,252, the exchange of shares with Sun Holdings, and the distribution of
previously taxed S Corporation retained earnings are reflected in the statement
of changes in shareholders' equity.

    The $19,252 of net proceeds from the IPO were used as follows:  an S
Corporation distribution of $9,446, representing 90% of the total distribution
of $10,545, $7,676 was paid to extinguish debt, $1,000 was paid to reduce the
mortgage on the manifold facility, and $1,130 was retained as working capital.

    The Company has 20,000,000 authorized shares of common stock, par value
$0.001, with 6,325,922 shares outstanding at March 31, 1998.  The Company also
has 2,000,000 authorized shares of preferred stock, par value $0.001, with no
shares outstanding.

4.  EARNINGS PER SHARE

    During the first quarter of 1997, Statement on Financial Accounting
Standards No. 128 ("SFAS 128"), "Earnings per Share," was issued. SFAS 128 is in
effect for the year ended December 31, 1997 and requires a restatement of
previously reported earnings per share.  SFAS 128 requires the Company to report
both basic earnings per common share, which is based on the weighted average
number of common shares outstanding, and diluted earnings per common share,
which is based on the weighted average number of common shares outstanding and
all dilutive potential common shares outstanding. All prior years' earnings per
share data in this report have been recalculated to reflect the provisions of
SFAS 128.

5.  INVENTORIES (in thousands)

<TABLE>
<CAPTION>
                                                               March 31,              December 31,
                                                                  1998                    1997
                                                               (unaudited)
         <S>                                                  <C>                      <C>
         Raw materials                                        $      184                 $   214
         Work in process                                           4,576                   4,348
         Finished goods                                            1,743                   2,213
                                                               ---------                 -------
                                                              $    6,503                 $ 6,775
                                                              ==========                 =======
                                                                                             
</TABLE>


                                      8
<PAGE>   9


6.  LONG-TERM DEBT (in thousands)

<TABLE>
<CAPTION>
                                                                      March 31,               December 31,
                                                                        1998                     1997
                                                                    (unaudited)
<S>                                                                 <C>                        <C>
Lines of credit agreements                                          $     1,696                $       666

Mortgage note payable-U.S. Manifold facility                              4,953                      4,990

Mortgage note payable-German facility                                     1,876                      1,999
                                                                    -----------                -----------
                                                                          8,525                      7,655
Less amounts due within one year                                         (1,837)                    (1,035) 
                                                                    -----------                -----------
                                                                    $     6,688                $     6,620
                                                                    ===========                ===========

</TABLE>

    The Company has three revolving lines of credit; one in the United States,
one in England, and one in Germany.  None of these arrangements contain
pre-payment penalties.

    The United States had a $1,700 revolving credit agreement, secured by all
inventory and accounts receivable, bearing interest at the lender's prime rate
with a maturity date of March 1, 1997.  In February 1997, the Company
negotiated a one-year, unsecured revolving credit facility to replace the
$1,700 revolving credit agreement.  The new credit facility provides for a
maximum availability of $10,000, payable on demand at the lender's prime rate
of interest.  There are no debt covenants related to this facility. In February
1998, the Company renegotiated this unsecured credit facility with a term of
one year and an interest rate equal to the bank lender's prime rate less 1%, or
LIBOR plus 1.9% for predetermined periods of time at the Company's option.  At
March 31, 1998, $1,650 was outstanding under this credit facility.

    In England, the Company has a $1,200 line of credit, denominated in British
pounds, which bears interest at a floating rate equal to 2.25% over the bank's
base rate and is a demand note.  At March 31, 1998 there was no balance
outstanding on this credit facility.

    The German line of credit is a demand note denominated in German Marks with
interest payable at the lender's prime rate.  At March 31, 1998, $46 was
outstanding under this credit facility.

    A 10-year mortgage note of $6,187 was obtained at a fixed interest rate of
8.25% for construction of the manifold facility.  Terms on the construction
note were interest-only on the balance drawn down through the completion of
construction and then conversion to a 10-year mortgage note with a 15-year
amortization schedule.  The Company applied $1,000 of the IPO proceeds toward
repayment of this note.  In March 1998, this mortgage note was renegotiated to
an interest rate of 7.875%.  Terms are monthly principal and interest payments
of $43 for 8.25 years with remaining principal due July 1, 2006.





                                      9

<PAGE>   10

    In May 1996, the Company obtained a mortgage loan of approximately $2,400,
denominated in German marks, for the new facility in Erkelenz, Germany.  The
loan has a term of 12 years and bears interest at 6.47%.  At March 31, 1998,
$1,876 was outstanding under this credit facility.






                                      10

<PAGE>   11


Item 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND 
         RESULTS OF OPERATIONS

OVERVIEW

    The Company is a leading designer and manufacturer of high-performance,
screw-in hydraulic cartridge valves and manifolds which control force, speed
and motion as integral components in fluid power systems. The Company sells its
products globally through independent distributors.

    Demand for the first quarter was substantially the same as the record
first quarter of 1997, despite a sharp drop in demand in Asia.  Management
believes distributors in Asia are adjusting their inventories to an anticipated
lower level of activity.  Demand in all other major market areas was equal to
or greater than the first quarter of 1997.  Distributor inventories in the
United States increased over 20% since the first of the year.  Although this
increase is significant, when stated in the number of inventory turns, it is
generally in line with historical trends.  At the current demand levels and
recent production rates, management believes a leveling off of net sales will
occur in the near term.

    Customer delivery times improved during the first quarter of 1998, and the
published production lead times for many types of products were reduced.
However, management believes that the Company's responses to customer's product
delivery requests are still not satisfactory.  As a result, the Company
continues to view the improvement of product availability as its major
challenge.

COMPARISON OF THREE MONTHS ENDED MARCH 31, 1998 AND 1997

    Net sales increased 31.1%, or $4.5 million to $19.1 million in the three
month period ended March 31, 1998, compared to $14.6 million in the three month
period ended March 31, 1997.  Domestic net sales increased 39.6% or $3.7
million to $13.1 million in the three month period ended March 31, 1998.  This
increase reflected strength in both the mobile and industrial equipment sectors
of the fluid power industry, and the Company's ability to continue to increase
production.

    International net sales increased 16.0%, or $0.8 million to $6.1 million in
the three month period ended March 31, 1998.  European net sales increased
27.0% and sales to Asia decreased 16.3%.

    Gross profit increased 31.6% or $1.4 million to $5.8 million in the three
month period ended March 31, 1998, compared to $4.4 million in the three month
period ended March 31, 1997.  This increase primarily was related to the
increase in net sales.  Gross profit as a percentage of net sales was 30.2% in
the three month period ended March 31, 1998, compared to 30.1% in the three
month period ended March 31, 1997.  The favorable effects of fixed cost
absorption by higher net sales were offset by unfavorable product mix and
material cost increases.  The change in product mix was due to the increased
sales of high volume, lower margin, products produced in the recently completed
cellular production operation in the United States cartridge plant.  Material
cost increases relate to product design improvements and the outsourcing of
parts to help improve product delivery times.

                                      11

<PAGE>   12

    Selling, engineering and administrative expenses increased 10.9% or $0.3
million to $3.0 million in the three month period ended March 31, 1998,
compared to $2.7 million in the three month period ended March 31, 1997.  This
increase was due to additional personnel and expenses now required in the new
manifold plant in the United States, and new system implementation costs in the
United Kingdom.  Selling, engineering and administrative expenses as a
percentage of net sales decreased to 15.8% this quarter from 18.6% in the same
quarter last year.

    Interest expense was $0.3 million for the three month period ended March 31,
1998, an increase of $0.1 million compared to the three month period ended
March 31, 1997.  This increase is due to increased debt related to the
completion of the new plants in Germany and the United States subsequent to the
first quarter of 1997 and working capital financing required during the first
quarter of 1998.  Miscellaneous expense for the period ended March 31, 1998,
consists primarily of currency exchange losses in the United Kingdom, partially
offset by interest income in the United States.  Interest income for the first
quarter of 1998 was lower than the first quarter of 1997, due to the temporary
investment of IPO proceeds in 1997.

    The provision for income taxes in the three month period ended March 31,
1998, was 33.6% of pretax income compared to 35.8% of pretax income in the
three month period ended March 31, 1997. This decrease in rate is primarily due
to the change in mix of pretax income among the Company's three operating units
in Germany, the United Kingdom and the United States.

    Net income for the three month period ended March 31, 1998, increased to
$1.6 million representing 8.6% of net sales compared to $1.0 million,
representing 7.0% for the three month period ended March 31, 1997.

LIQUIDITY AND CAPITAL RESOURCES

    Historically, the Company's primary source of capital has been cash
generated from operations, although short-term fluctuations in working capital
requirements have been met through borrowings under revolving lines of credit
as needed.  The Company's principal uses of cash have been to pay operating
expenses, make capital expenditures, pay dividends to shareholders and service
debt.

    At March 31, 1998, the Company had working capital of $7.1 million.  Cash
flow from operations for the three months ended March 31, 1998, was $2.6
million compared to $1.7 million for the three months ended March 31, 1997.
Approximately, $0.6 million of the $0.9 million increase in cash flow from
operations was related to the increase in net income.

    Capital expenditures for the three months ended March 31, 1998, were $1.5
million, primarily for machinery and equipment. This compares with $2.3 million
spent on capital in the three months ended March 31, 1997, $1.2 million of
which was for machinery and equipment and $1.1 million to complete the new
facilities in Germany and the United States.

    The Company has three revolving lines of credit: one in the United States,
one in England, and one in Germany.  None of these arrangements contain
pre-payment penalties.




                                      12

<PAGE>   13

    In February 1998, the Company renegotiated its one-year, unsecured
revolving credit facility in the United States.  The credit facility provides
for a maximum availability of $10.0 million, payable on demand and does not
contain any debt covenants. The interest rate is equal to the bank lender's
prime rate less 1%, or LIBOR plus 1.9% for predetermined periods of time, at
the Company's option. At March 31, 1998, there was $1.7 million outstanding
under this credit facility.

    A 10-year mortgage note of $6.1 million was issued by the Company in May
1996, which bears interest at a fixed rate of 8.25% for construction of the new
manifold facility in Sarasota, Florida.  Terms on the new mortgage note were
interest-only on the balance drawn down through the completion of construction
and then conversion to a 10-year note with a 15-year amortization schedule.  In
March 1998, this mortgage note was renegotiated to an interest rate of 7.875%.
Terms are monthly principal and interest payments for 8.25 years with remaining
principal due July 1, 2006.  At March 31, 1998, $5.0 million was outstanding on
this facility.

    In addition, the Company has notes payable to former stockholders, which
bear interest at a weighted rate of 15%, and which have terms ranging from
three to five years.  These notes were issued by the Company in 1989 and 1990,
in connection with the repurchase of shares of common stock from the former
shareholders, and do not allow for prepayment by the Company. At March 31,
1998, $1.7 million was outstanding under these notes.

    The Company has submitted a business interruption insurance claim of $2.3
million to its insurance carrier. The claim is related to a fire in the manifold
plant in the United States which occurred while the plant was under
construction.  The Company believes that this fire delayed the opening of the
new plant which, in turn, delayed the rearrangement of the cartridge operation
and the creation of the cellular production for high volume models.  The
validity and amount of the claim continue to be evaluated by the Company's
insurance carrier.  No amounts have been recorded related to this claim in the
Company's financial statements.

    The Company believes that cash generated from operations and its borrowing
availability under its revolving lines of credit will be sufficient to satisfy
the Company's operating expenses and capital expenditures for the foreseeable
future.

    The Company declared a quarterly dividend of $0.04 per share to
shareholders of record on March 31, 1998, which was paid on April 15, 1998.

YEAR 2000

    Management believes that the computer systems in three of the Company's
four locations currently are capable of processing data related to the year
2000.  The systems in the United States cartridge plant are not capable of
properly processing year 2000 data.  The Company plans to replace the current
system in time to meet year 2000 requirements.  The implementation process for
this new system began in the first quarter of 1998.  The new system cost is not
expected to significantly impact the results of operations.  As with any new
system implementation, there can be no assurance that the conversion will not
significantly impact operations.  Also, there can be no assurance that the
systems of other companies on which the Company relies will be timely converted
or that any such failure to convert by another company will not have an adverse
effect on the Company's operations.



                                      13



<PAGE>   14

SEASONALITY AND INFLATION

    The Company does not believe that inflation had a material effect on its
operations for the three months ended March 31, 1998 and March 31, 1997.  There
can be no assurance, however, that the Company's business will not be affected
by inflation in the future.

FORWARD-LOOKING INFORMATION

      Certain oral statements made by management from time to time and certain
statements contained herein that are not historical facts are "forward-looking
statements" within the meaning of Section 21E of the Securities Exchange Act of
1934 and because such statements involve risks and uncertainties, actual
results may differ materially from those expressed or implied by such
forward-looking statements. Forward-looking statements, including those in
Management's Discussion and Analysis of Financial Condition and Results of
Operations are statements regarding the intent, belief or current expectations,
estimates or projections of the Company, its Directors or its Officers about
the Company and the industry in which it operates, and assumptions made by
management, and include among other items, (i) the Company's strategies
regarding growth, including its intention to develop new products; (ii) the
Company's financing plans; (iii) trends affecting the Company's financial
condition or results of operations; (iv) the Company's ability to continue to
control costs and to meet its liquidity and other financing needs; (v) the
declaration and payment of dividends; and (vi) the Company's ability to respond
to changes in customer demand domestically and internationally, including as a
result of standardization.  Although the Company believes that its expectations
are based on reasonable assumptions, it can give no assurance that the
anticipated results will occur.

      Important factors that could cause the actual results to differ materially
from those in the forward-looking statements include, among other items, (i)
the economic cyclicality of the capital goods industry in general and the
hydraulic valve and manifold industry in particular, which directly affect
customer orders, lead times and sales volume; (ii) conditions in the capital
markets, including the interest rate environment and the availability of
capital; (iii) changes in the competitive marketplace that could affect the
Company's revenue and/or cost bases, such as increased competition, lack of
qualified engineering, marketing, management or other personnel, and increased
labor and raw materials costs; (iv) changes in technology or customer
requirements, such as standardization of the cavity into which screw-in
cartridge valves must fit, which could render the Company's products or
technologies noncompetitive or obsolete; (v) new product introductions, product
sales mix and the geographic mix of sales nationally and internationally; and
(vi) changes relating to the Company's international sales, including changes
in regulatory requirements or tariffs, trade or currency restrictions,
fluctuations in exchange rates, and tax and collection issues.  Further
information relating to factors that could cause actual results to differ from
those anticipated is included but not limited to information under the headings
"Risk Factors" in the Form S-1 Registration Statement and Prospectus for the
Company's initial public offering, and "Business" in the Company's Form 10-K
for the year ended December 31, 1997.  The Company disclaims any intention or
obligation to update or revise forward-looking statements, whether as a result
of new information, future events or otherwise.




                                      14

<PAGE>   15

                                    PART II
                               OTHER INFORMATION

Item 1.   Legal Proceedings.
     None.

Item 2.   Changes in Securities.
     None.

Item 3.   Defaults upon Senior Securities.
     None.

Item 4.   Submission of Matters to a Vote of Security Holders.
     None.

Item 5.   Other Information.                          
     None.

Item 6.   Exhibits and Reports on Form 8-K
     (a)  Exhibits:


<TABLE>
<CAPTION>
                                        
   EXHIBIT                                       EXHIBIT DESCRIPTION
    NUMBER                                       -------------------
    ------
         <S>   <C>
          3.1  Amended and Restated Articles of Incorporation of the Company (previously filed as
               Exhibit 3.1 in the Pre-Effective Amendment No. 4 to the Company's Registration
               Statement on Form S-1 filed on December 19, 1996 (File No. 333-14183) and
               incorporated herein by reference).

          3.2  Amended and Restated Bylaws of the Company (previously filed as Exhibit 3.2 in the
               Pre-Effective Amendment No. 4 to the Company's Registration Statement on Form S-1
               filed on December 19, 1996 (File No. 333-14183) and incorporated herein by
               reference).

          4.1  Revolving Credit Agreement, dated March 9, 1992, between Sun Hydraulics Corporation
               and Northern Trust Bank of Florida/Sarasota, N.A. (previously filed as Exhibit 4.1 in
               the Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No.
               333-14183) and incorporated herein by reference).

          4.2  Modification Agreement, dated March 25, 1993, amending Revolving Credit Agreement
               dated March 9, 1992, between Sun Hydraulics Corporation and Northern Trust Bank of
               Florida, N.A. (previously filed as Exhibit 4.2 in the Company's Registration
               Statement on Form S-1 filed on October 15, 1996 (File No. 333-14183) and incorporated
               herein by reference).

</TABLE>

                                      15

<PAGE>   16

<TABLE>
         <S>   <C>

          4.3  Second Modification to Revolving Credit Agreement, dated May __, 1995, between Sun
               Hydraulics Corporation and Northern Trust Bank of Florida, N.A. (previously filed as
               Exhibit 4.3 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

          4.4  Revolving Line of Credit Renewal Note, dated May __, 1995, in the amount of
               $1,700,000.00 given by Sun Hydraulics Corporation to Northern Trust Bank of Florida,
               N.A. (previously filed as Exhibit 4.4 in the Company's Registration Statement on Form
               S-1 filed on October 15, 1996 (File No. 333-14183) and incorporated herein by
               reference).

          4.5  Mortgage and Security Agreement, dated January 9, 1992, between Suninco, Inc., Sun
               Hydraulics Corporation, and Northern Trust Bank of Florida, N.A. (previously filed as
               Exhibit 4.5 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

          4.6  Loan Agreement, dated March 29, 1996, between Suninco, Inc., Sun Hydraulics
               Corporation, and Northern Trust Bank of Florida, N.A. (previously filed as
               Exhibit 4.6 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

          4.7  Security Agreement, dated March 29, 1996, between Suninco, Inc., Sun Hydraulics
               Corporation, and Northern Trust Bank of Florida, N.A. (previously filed as
               Exhibit 4.7 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

          4.8  Modification and Additional Advance Agreement, dated March 29, 1996, between Suninco,
               Inc. and Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.8 in the
               Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-
               14183) and incorporated herein by reference).

          4.9  Consolidated Note, dated March 29, 1996, in the amount of $2,475,000.00, given by
               Suninco, Inc. to Northern Trust Bank of Florida, N.A. (previously filed as
               Exhibit 4.9 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

          4.10 Loan Agreement, dated May 20, 1996, between Sun Hydraulics Corporation and Northern
               Trust Bank of Florida, N.A. (previously filed as Exhibit 4.10 in the Company's
               Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-14183) and
               incorporated herein by reference).

</TABLE>




                                      16

<PAGE>   17

<TABLE>
         <S>   <C>
         4.11  Security Agreement, dated May 20, 1996, between Sun Hydraulics Corporation and
               Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.11 in the
               Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-
               14183) and incorporated herein by reference).

         4.12  Consolidated Note, dated May 20, 1996, in the amount of $3,063,157.00, given by Sun
               Hydraulics Corporation to Northern Trust Bank of Florida, N.A. (previously filed as
               Exhibit 4.12 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

         4.13  Loan Agreement, dated June 14, 1996, between Sun Hydraulics Corporation, Suninco
               Inc., and Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.13 in
               the Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No.
               333-14183) and incorporated herein by reference).

         4.14  Mortgage, dated June 14, 1996, between Sun Hydraulics Corporation, Suninco Inc., and
               Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.14 in the
               Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-
               14183) and incorporated herein by reference).

         4.15  Security Agreement, dated June 14, 1996, between Sun Hydraulics Corporation and
               Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.15 in the
               Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-
               14183) and incorporated herein by reference).
                                                            
         4.16  Promissory Note, dated June 14, 1996, in the amount of $6,187,000.00, given by Sun
               Hydraulics Corporation and Suninco, Inc. to Northern Trust Bank of Florida, N.A.
               (previously filed as Exhibit 4.16 in the Company's Registration Statement on Form S-1
               filed on October 15, 1996 (File No. 333-14183) and incorporated herein by reference).

         4.17  Revolving Loan Facility letter agreement, dated July 30, 1996, in the amount of
               L.800,000, between Sun Hydraulics Ltd. and Lloyds Bank Plc. (previously filed as
               Exhibit 4.17 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

         4.18  Overdraft and Other Facilities letter agreement, dated June 7, 1996, in an amount not
               to exceed L.250,000, between Sun Hydraulics Ltd. and Lloyds Bank Plc. (previously
               filed as Exhibit 4.18 in the Company's Registration Statement on Form S-1 filed on
               October 15, 1996 (File No. 333-14183) and incorporated herein by reference).

</TABLE>


                                      17

<PAGE>   18

<TABLE>

        <S>    <C>
         4.19  Mortgage, dated April 11, 1996, between Sun Hydraulik GmbH and Dresdner Bank
               (previously filed as Exhibit 4.19 in the Company's Registration Statement on Form S-1
               filed on October 15, 1996 (File No. 333-14183) and incorporated herein by reference).

         4.20  Amendment to Recommended Offer by Sun Hydraulics Corporation to acquire the whole of
               the issued share capital of Sun Hydraulik Holdings Limited, dated December 17, 1996
               (previously filed as Exhibit 2.1 in the Pre-Effective Amendment No. 4 to the
               Company's Registration Statement on Form S-1 filed on December 19, 1996 (File No.
               333-14183) and incorporated herein by reference).

         4.21  Master Note, dated February 3, 1997, in the amount of $10,000,000.00, made by the
               Company to evidence a line of credit granted to the Company by Northern Trust Bank of
               Florida, N.A. (previously filed as Exhibit 4.21 to the Company's Annual Report on
               Form 10-K for the year ended December 31, 1996 and incorporated herein by reference).        
      
         4.22  Renewal Master Note, dated February 3, 1998, in the amount of $10,000,000.00, made by
               the Company to evidence a line of credit granted to the Company by Northern Trust Bank
               of Florida, N.A.

         4.23  Modification Agreement, dated March 1, 1998, between the Company and Northern Trust Bank
               of Florida, N.A.

         4.24  Modification Note, dated March 1, 1998, in the amount of $4,965,524.51, between the Company 
               and Northern Trust Bank of Florida, N.A.

        10.1   Form of Distributor Agreement (Domestic) (previously filed as Exhibit 10.1 in the
               Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-
               14183) and incorporated herein by reference).

        10.2   Form of Distributor Agreement (International) (previously filed as Exhibit 10.2 in
               the Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No.
               333-14183) and incorporated herein by reference).

        10.3+  1996 Sun Hydraulics Corporation Stock Option Plan (previously filed as Exhibit 10.3
               in the Pre-Effective Amendment No. 4 to the Company's Registration Statement on Form
               S-1 filed on December 19, 1996 (File No. 333-14183) and incorporated herein by
               reference).

        10.4+  Amendment No. 1 to 1996 Stock Option Plan (previously filed as Exhibit 10.4 to the
               Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 1997 and
               incorporated herein by reference).

        10.5+  Form of Indemnification Agreement (previously filed as Exhibit 10.4 in the Pre-
               Effective Amendment No. 4 to the Company's Registration Statement on Form S-1 filed
               on December 19, 1996 (File No. 333-14183) and incorporated herein by reference).
    
        27.1   Financial Data Schedule for quarter ended March 31, 1998 (for SEC purposes only)
</TABLE>





                                      18

<PAGE>   19


  +  Executive management contract or compensatory plan or arrangement.

     (b)  Reports on Form 8-K.

          Report on Form 8-K dated March 5, 1998, announcing year end and 
          fourth quarter results, as well as a $0.04 per share dividend on its 
          common stock payable on April 15, 1998, to shareholders of record 
          on March 31, 1998.





                                      19

<PAGE>   20

                                   SIGNATURES

    Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this Report to be signed
on its behalf by the undersigned, thereunto duly authorized, in the City of
Sarasota, State of Florida on May 13, 1998.

                                        SUN HYDRAULICS CORPORATION


                                        By:  /s/  Richard J. Dobbyn  
                                           ------------------------------------
                                             Richard J. Dobbyn  
                                             Chief Financial Officer (Principal
                                             Financial and Accounting
                                             Officer)




                                      20

<PAGE>   21

                                 EXHIBIT INDEX
<TABLE>
<CAPTION>

   EXHIBIT                                                            
    NUMBER                                        EXHIBIT DESCRIPTION 
    ------                                        ------------------- 
           
         <S>   <C>
          3.1  Amended and Restated Articles of Incorporation of the Company (previously filed as
               Exhibit 3.1 in the Pre-Effective Amendment No. 4 to the Company's Registration
               Statement on Form S-1 filed on December 19, 1996 (File No. 333-14183) and incorporated
               herein by reference).

          3.2  Amended and Restated Bylaws of the Company (previously filed as Exhibit 3.2 in the Pre-
               Effective Amendment No. 4 to the Company's Registration Statement on Form S-1 filed on
               December 19, 1996 (File No. 333-14183) and incorporated herein by reference).

          4.1  Revolving Credit Agreement, dated March 9, 1992, between Sun Hydraulics Corporation and
               Northern Trust Bank of Florida/Sarasota, N.A. (previously filed as Exhibit 4.1 in the
               Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-
               14183) and incorporated herein by reference).

          4.2  Modification Agreement, dated March 25, 1993, amending Revolving Credit Agreement dated
               March 9, 1992, between Sun Hydraulics Corporation and Northern Trust Bank of Florida,
               N.A. (previously filed as Exhibit 4.2 in the Company's Registration Statement on Form
               S-1 filed on October 15, 1996 (File No. 333-14183) and incorporated herein by
               reference).

          4.3  Second Modification to Revolving Credit Agreement, dated May __, 1995, between Sun
               Hydraulics Corporation and Northern Trust Bank of Florida, N.A. (previously filed as
               Exhibit 4.3 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

          4.4  Revolving Line of Credit Renewal Note, dated May __, 1995, in the amount of
               $1,700,000.00 given by Sun Hydraulics Corporation to Northern Trust Bank of Florida,
               N.A. (previously filed as Exhibit 4.4 in the Company's Registration Statement on Form
               S-1 filed on October 15, 1996 (File No. 333-14183) and incorporated herein by
               reference).

          4.5  Mortgage and Security Agreement, dated January 9, 1992, between Suninco, Inc., Sun
               Hydraulics Corporation, and Northern Trust Bank of Florida, N.A. (previously filed as
               Exhibit 4.5 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

          4.6  Loan Agreement, dated March 29, 1996, between Suninco, Inc., Sun Hydraulics
               Corporation, and Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.6
               in the Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No.
               333-14183) and incorporated herein by reference).


</TABLE>


                                      21
<PAGE>   22



<TABLE>
         <S>   <C>
         4.7   Security Agreement, dated March 29, 1996, between Suninco, Inc., Sun Hydraulics
               Corporation, and Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.7
               in the Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No.
               333-14183) and incorporated herein by reference).

         4.8   Modification and Additional Advance Agreement, dated March 29, 1996, between Suninco,
               Inc. and Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.8 in the
               Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-
               14183) and incorporated herein by reference).

         4.9   Consolidated Note, dated March 29, 1996, in the amount of $2,475,000.00, given by
               Suninco, Inc. to Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.9
               in the Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No.
               333-14183) and incorporated herein by reference).

         4.10  Loan Agreement, dated May 20, 1996, between Sun Hydraulics Corporation and Northern
               Trust Bank of Florida, N.A. (previously filed as Exhibit 4.10 in the Company's
               Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-14183) and
               incorporated herein by reference).

         4.11  Security Agreement, dated May 20, 1996, between Sun Hydraulics Corporation and Northern
               Trust Bank of Florida, N.A. (previously filed as Exhibit 4.11 in the Company's
               Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-14183) and
               incorporated herein by reference).

         4.12  Consolidated Note, dated May 20, 1996, in the amount of $3,063,157.00, given by Sun
               Hydraulics Corporation to Northern Trust Bank of Florida, N.A. (previously filed as
               Exhibit 4.12 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

         4.13  Loan Agreement, dated June 14, 1996, between Sun Hydraulics Corporation, Suninco Inc.,
               and Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.13 in the
               Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-
               14183) and incorporated herein by reference).

         4.14  Mortgage, dated June 14, 1996, between Sun Hydraulics Corporation, Suninco Inc., and
               Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.14 in the Company's
               Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-14183) and
               incorporated herein by reference).


</TABLE>


                                      22
<PAGE>   23


<TABLE>
         <S>   <C>
         4.15  Security Agreement, dated June 14, 1996, between Sun Hydraulics Corporation and
               Northern Trust Bank of Florida, N.A. (previously filed as Exhibit 4.15 in the Company's
               Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-14183) and
               incorporated herein by reference).

         4.16  Promissory Note, dated June 14, 1996, in the amount of $6,187,000.00, given by Sun
               Hydraulics Corporation and Suninco, Inc. to Northern Trust Bank of Florida, N.A.
               (previously filed as Exhibit 4.16 in the Company's Registration Statement on Form S-1
               filed on October 15, 1996 (File No. 333-14183) and incorporated herein by reference).

         4.17  Revolving Loan Facility letter agreement, dated July 30, 1996, in the amount of
               L.800,000, between Sun Hydraulics Ltd. and Lloyds Bank Plc. (previously filed as
               Exhibit 4.17 in the Company's Registration Statement on Form S-1 filed on October 15,
               1996 (File No. 333-14183) and incorporated herein by reference).

         4.18  Overdraft and Other Facilities letter agreement, dated June 7, 1996, in an amount not
               to exceed L.250,000, between Sun Hydraulics Ltd. and Lloyds Bank Plc. (previously filed
               as Exhibit 4.18 in the Company's Registration Statement on Form S-1 filed on
               October 15, 1996 (File No. 333-14183) and incorporated herein by reference).

         4.19  Mortgage, dated April 11, 1996, between Sun Hydraulik GmbH and Dresdner Bank
               (previously filed as Exhibit 4.19 in the Company's Registration Statement on Form S-1
               filed on October 15, 1996 (File No. 333-14183) and incorporated herein by reference).
                                                                                                    
         4.20  Amendment to Recommended Offer by Sun Hydraulics Corporation to acquire the whole of
               the issued share capital of Sun Hydraulik Holdings Limited, dated December 17, 1996
               (previously filed as Exhibit 2.1 in the Pre-Effective Amendment No. 4 to the Company's
               Registration Statement on Form S-1 filed on December 19, 1996 (File No. 333-14183) and
               incorporated herein by reference).

         4.21  Master Note, dated February 3, 1997, in the amount of $10,000,000.00, made by the
               Company to evidence a line of credit granted to the Company by Northern Trust Bank of
               Florida, N.A. (previously filed as Exhibit 4.21 to the Company's Annual Report on Form
               10-K for the year ended December 31, 1996 and incorporated herein by reference).

         4.22  Renewal Master Note, dated February 3, 1998, in the amount of $10,000,000.00, made by
               the Company to evidence a line of credit granted to the Company by Northern Trust Bank
               of Florida, N.A.

         4.23  Modification Agreement, dated March 1, 1998, between the Company and Northern Trust Bank
               of Florida, N.A.

         4.24  Modification Note, dated March 1, 1998, in the amount of $4,965,524.51, between the Company 
               and Northern Trust Bank of Florida, N.A.

        10.1   Form of Distributor Agreement (Domestic) (previously filed as Exhibit 10.1 in the
               Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-
               14183) and incorporated herein by reference).

</TABLE>


                                      23

<PAGE>   24

<TABLE>
        <S>    <C>
 
        10.2   Form of Distributor Agreement (International) (previously filed as Exhibit 10.2 in the
               Company's Registration Statement on Form S-1 filed on October 15, 1996 (File No. 333-
               14183) and incorporated herein by reference).

        10.3+  1996 Sun Hydraulics Corporation Stock Option Plan (previously filed as Exhibit 10.3 in
               the Pre-Effective Amendment No. 4 to the Company's Registration Statement on Form S-1
               filed on December 19, 1996 (File No. 333-14183) and incorporated herein by reference).

        10.4+  Amendment No. 1 to 1996 Stock Option Plan (previously filed as Exhibit 10.4 to the
               Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 1997 and
               incorporated herein by reference).

        10.5+  Form of Indemnification Agreement (previously filed as Exhibit 10.4 in the Pre-
               Effective Amendment No. 4 to the Company's Registration Statement on Form S-1 filed on
               December 19, 1996 (File No. 333-14183) and incorporated herein by reference).

        27.1   Financial Data Schedule for quarter ended March 31, 1998 (for SEC purposes only).
                      
</TABLE>  


  +  Executive management contract or compensatory plan or arrangement.







                                      24


<PAGE>   1
                                                                    Exhibit 4.22

                                                    Dated as of February 3, 1998

                               RENEWAL MASTER NOTE
                   (CORPORATION, PARTNERSHIP OR JOINT VENTURE)

         This Note has been executed by SUN HYDRAULICS CORPORATION, a
corporation formed under the laws of the State of Florida ("Borrower"); if more
than one entity executes this Note, the term "Borrower" refers to each of them
individually and some or all of them collectively, and their obligations
hereunder shall be joint and several.* If a land trustee executes this Note,
"Borrower" as used in sections 6 and 7 below also includes any beneficiary(ies)
of the land trust.**

         FOR VALUE RECEIVED, on or before February 3, 1999, the scheduled
maturity date hereof, Borrower promises to pay to the order of NORTHERN TRUST
BANK OF FLORIDA, N.A., a national banking association (hereafter, together with
any subsequent holder hereof, called "Lender"), at its banking office at 1515
Ringling Blvd., Sarasota, FL, or at such other place as Lender may direct, the
aggregate unpaid principal balance of each advance (a "Loan" and collectively
the "Loans") made by Lender to Borrower hereunder. The total principal amount of
Loans outstanding at any one time hereunder shall not exceed TEN MILLION AND
00/100 UNITED STATES DOLLARS ($10,000,000.00).

         Lender is hereby authorized by Borrower at any time and from time to
time at Lender's sole option to attach a schedule (grid) to this Note and to
endorse thereon notations with respect to each Loan specifying the date and
principal amount thereof, the Interim Maturity Date (as defined below) (if
applicable), the applicable interest rate and rate option, and the date and
amount of each payment of principal and interest made by Borrower with respect
to each such Loan. Lender's endorsements as well as its records relating to
Loans shall be rebuttably presumptive evidence of the outstanding principal and
interest on the Loans, and, in the event of inconsistency, shall prevail over
any records of Borrower and any written confirmations of Loans given by
Borrower.

         If Borrower wishes to obtain a Loan under this Note, Borrower shall
notify Lender orally or in writing on a banking day. Any such notice shall be
irrevocable; if the notice is received after 2:00 p.m. Eastern time the Loan may
not be available until the next banking day. Additional procedures for "Bank
Offered Rate" Loans, if available, are set forth below.

         Each request for a Loan shall be deemed to be a representation and
warranty by Borrower to Lender that: (i) no Event of Default or Unmatured Event
of Default (in each case as defined below) has occurred and is continuing as of
the date of such request or would result from the making of the Loan; and (ii)
Borrower's representations and warranties herein are true and correct as of such
date as though made on such date. Upon receipt of each Loan request Lender in
its sole discretion shall 

- ----------------------
*        Insert "N/A" in any blank in this Note which is not applicable.

**       Land trustee may not sign upon direction of individual beneficiary(ies)
unless Loans are for business purposes.
<PAGE>   2

have the right to request that Borrower provide to Lender, prior to Lender's
funding of the Loan, a certificate executed by Borrower's President, Treasurer,
or Chief Financial Officer (if Borrower is a corporation), or a general partner
or joint venturer of Borrower (if Borrower is a partnership or joint venture) to
such effect.

1.       INTEREST.

         Borrower agrees to pay interest on the unpaid principal amount from
time to time outstanding hereunder at the following rate per year: (CHECK ONE
ONLY)

|X|      (i) The "Prime-Based Rate", which shall mean the Prime Rate minus One
         percent (1.00%).

| |      ***(ii) The "Bank Offered Rate", which shall be equal to that rate of
         interest offered by Lender and accepted by Borrower and fixed for
         periods of up to one year ("Interest Period(s)") (the last day of any
         Interest Period being referred to as an "Interim Maturity Date"). Other
         description N/A .

"Prime Rate" means that rate of interest announced from time to time by Lender
called its prime rate, which rate may not at any time be the lowest rate charged
by Lender. Changes in the rate of interest on the Loans resulting from a change
in the Prime Rate shall take effect on the date set forth in each announcement
of a change in the Prime Rate.

         Without limiting Borrower's obligation to repay all outstanding Loans
in full on the scheduled maturity date, each Loan at the Bank Offered Rate shall
be due and payable in full on its Interim Maturity Date. After the maturity of
any Loan, whether by acceleration or otherwise, such Loan shall bear interest
until paid, at a rate equal to six percent (6%) in addition to the rate in
effect immediately prior to maturity (but not less than the Prime Rate in effect
at maturity).

         If this Note bears interest at the Bank Offered Rate and Borrower
requests a Loan, Lender shall in its sole discretion offer or decline to offer a
Bank Offered Rate (and if it offers a Bank Offered Rate, the rate of such Bank
Offered Rate shall be in Lender's sole discretion), and Borrower shall
irrevocably accept or decline such particular Bank Offered Rate and the related
Loan and confirm such acceptance in writing by letter or other written
communication dated and sent the date of such borrowing. Any confirmation by
Lender of the rate and Interest Period for any Bank Offered Rate Loan shall be
conclusive in the absence of manifest error. Without limiting Borrower's
obligations under any other document or instrument, Lender may rely without
inquiry upon any person whom it reasonably believes to be a party authorized to
accept or decline such Bank Offered Rate and the related Loan. Lender has no
obligation to make a new Loan to Borrower when a Loan at the Bank Offered Rate
matures on its Interim Maturity Date.


- --------------------------
***   Do not use if collateral includes real estate.
 
                                      2
<PAGE>   3

         Interest shall be computed for the actual number of days elapsed on the
basis of a year consisting of 360 days, including the date a Loan is made and
excluding the date a Loan or any portion thereof is paid or prepaid. Interest
shall be due and payable as follows:

|X|      Monthly, on the 1st day of each month, beginning March 1, 1998, with
         all accrued but unpaid interest being due and payable in full with the
         final principal payment due hereunder.

| |      Quarterly, on the N/A day of each _____________, ______________,
         _____________, and ______________ in each year, beginning
         ______________, with all accrued but unpaid interest being due and
         payable in full with the final principal payment due hereunder.

| |      Other             N/A

In addition, if the Bank Offered Rate is available under this Note, interest on
any Loan at the Bank Offered Rate, if not otherwise previously due and payable
as indicated above, shall be due and payable in full on the last day of each
Interest Period. After maturity interest shall be payable on demand.

2.       PREPAYMENTS.

         Borrower may prepay without penalty or premium any principal bearing
interest at the Prime-Based Rate. If Borrower prepays any principal bearing
interest at the Bank Offered Rate in whole or in part, or if the maturity of any
such Bank Offered Rate principal is accelerated, then, to the fullest extent
permitted by law Borrower shall also pay Lender for all losses (including but
not limited to interest rate margin and any other losses of anticipated profits)
and expenses incurred by reason of the liquidation or re-employment of deposits
acquired by Lender to make the Loan or maintain principal outstanding at the
Bank Offered Rate. Upon Lender's demand in writing specifying such losses and
expenses, Borrower shall promptly pay them; Lender's specification shall be
deemed correct in the absence of manifest error. Each Loan bearing interest at
the Bank Offered Rate shall be conclusively deemed to have been funded by or on
behalf of Lender by the purchase of a deposit corresponding in amount to such
Loan and in maturity to the Interest Period specified by Lender.

3.       REFERENCES TO PREVIOUS NOTES, FACILITY TYPE, COLLATERAL, GUARANTIES,
LOAN & OTHER AGREEMENTS. (Check As Applicable)

LINE OF CREDIT: This Note has been executed pursuant to a line of credit. At the
present time Lender intends to make available to Borrower credit as outlined
herein or in any related letter until the maturity day indicated above unless in
Lender's sole judgment there has occurred an adverse change in the assets,
condition or prospects of Borrower or any guarantor. THE LINE OF CREDIT MAY BE
CANCELLED OR REDUCED BY LENDER AT LENDER'S SOLE OPTION WITHOUT PRIOR NOTICE TO
BORROWER OR ANY OTHER PERSON OR ENTITY. THE LINE OF CREDIT IS REVOCABLE
NOTWITHSTANDING PAYMENT OF ANY FEES OR MAINTENANCE OF ANY ACCOUNT BALANCES, AS
AND IF PROVIDED IN ANY ACCOMPANYING LETTER OR OTHER DOCUMENT PERTAINING TO SUCH
FEES

                                       3
<PAGE>   4

AND/OR BALANCES. Any such fees and/or balances shall be deemed compensation to
Lender for being prepared to respond to Borrower's requests for credit under
this Note.

|X| This Note amends, restates, renews and replaces in its entirety the note
dated February 3, 1997, in the amount of $10,000,000.00 and any previously
renewed note(s). Borrower hereby expressly confirms that all collateral and
guaranties given for such prior note(s) shall secure or guarantee this Note. All
amounts outstanding under such previous note(s) shall be deemed automatically
outstanding hereunder.

| | This Note is secured without limitation as provided in the following and all
related documents, in each case as amended, modified, renewed, restated or
replaced from time to time:

    | |      Security Agreement dated as of N/A.

    | |      Mortgage dated as of N/A on property all or part of which is 
             commonly known as _______________________

    | |      Pledge Agreement dated as of N/A.

    | |      Other (describe)       N/A

| |      Payment of this Note has been unconditionally guaranteed by N/A (each
         individually an all collectively referred to as "guarantor") as
         provided in separately executed guaranties.

| |      This Note has been executed pursuant to a N/A Agreement, dated as of 
the date hereof, as amended, modified, restated, renewed, or replaced from time
to time, containing covenants and other terms, to which reference is hereby
made.

4.       USE OF PROCEEDS.  CHECK ONE:

|X| Borrower represents and warrants that the proceeds of this Note will be used
solely for business purposes, and not for personal, family or household use,
within the meaning of Federal Truth-in-Lending and similar state laws and
regulations.

| | ****Borrower represents that the proceeds of this Note will be used for
personal, family or household use. IF THIS OPTION IS CHECKED, THE FIRST LOAN
MUST BE IN THE AMOUNT OF $25,001 OR MORE.

If Loan proceeds will be used to purchase or refinance the purchase of any
property describe:
                         N/A
- ----------------------------------------------------------------------------

- ---------------------------
****If this box is checked and a land trustee is signing the Note, do not take 
real estate as collateral.


                                       4
<PAGE>   5

Notwithstanding any other provision hereof, if this Note is covered by
Regulation Z of the Federal Reserve Board (Truth-in-Lending) or any like
disclosure requirement, this Note shall be secured by collateral referenced
herein or in any other document only if disclosed in a related disclosure
statement.

5.       REPRESENTATIONS.

Borrower hereby represents and warrants to Lender that:

         (a) Borrower and any "Subsidiary" (as defined below) are existing and
         in good standing under the laws of their state of formation, are duly
         qualified, in good standing and authorized to do business in each
         jurisdiction where failure to do so might have a material adverse
         impact on the consolidated assets, condition or prospects of Borrower;
         the execution, delivery and performance of this Note and all related
         documents and instruments are within Borrower's powers and have been
         authorized by all necessary corporate, partnership or joint venture
         action;

         (b) the execution, delivery and performance of this Note and all
         related documents and instruments have received any and all necessary
         governmental approval, and do not and will not contravene or conflict
         with any provision of law or of the partnership or joint venture or
         similar agreement, charter or by-laws of Borrower or any agreement
         affecting Borrower or its property; and

         (c) there has been no material adverse change in the business,
         condition, properties, assets, operations or prospects of Borrower or
         any guarantor since the date of the latest financial statements
         provided on behalf of Borrower or any guarantor to Lender prior to the
         execution of this Note.

"Subsidiary" means any corporation, partnership, joint venture, trust, or other
legal entity of which Borrower owns directly or indirectly fifty percent (50%)
or more of the outstanding voting stock or interest, or of which Borrower has
effective control, by contract or otherwise.

6. EVENTS OF DEFAULT. The occurrence of any of the following shall constitute an
"Event of Default":

         (a) failure to pay, when and as due, any principal, interest or other
amounts payable hereunder; failure to comply with or perform any agreement or
covenant of Borrower contained herein; or failure to furnish (or caused to be
furnished to) Lender when and as requested by Lender (but not more often than
once every twelve months) fully completed personal financial statement(s) of any
individual guarantor on Lender's then-standard form together with such
supporting information as Lender may reasonably request; or

         (b) any default, event of default, or similar event shall occur or
continue under any other instrument, document, note, agreement, or guaranty
delivered to Lender in connection with this 

                                       5

<PAGE>   6

Note, or any such instrument, document, note, agreement, or guaranty shall not
be, or shall cease to be, enforceable in accordance with its terms; or

         (c) there shall occur any default or event of default, or any event or
condition that might become such with notice or the passage of time or both, or
any similar event, or any event that requires the prepayment of borrowed money
or the acceleration of the maturity thereof, under the terms of any evidence of
indebtedness or other agreement issued or assumed or entered into by Borrower,
any Subsidiary, any general partner or joint venturer of Borrower, or any
guarantor, or under the terms of any indenture, agreement, or instrument under
which any such evidence of indebtedness or other agreement is issued, assumed,
secured, or guaranteed, and such event shall continue beyond any applicable
period of grace; or

         (d) any representation, warranty, schedule, certificate, financial
statement, report, notice or other writing furnished by or on behalf of
Borrower, any Subsidiary, any general partner or joint venturer of Borrower, or
any guarantor to Lender is false or misleading in any material respect on the
date as of which the facts therein set forth are stated or certified; or

         (e) any guaranty of or pledge of collateral security for this Note
shall be repudiated or become unenforceable or incapable of performance, or

         (f) Borrower or any Subsidiary shall fail to maintain their existence
in good standing in their state of formation or shall fail to be duly qualified,
in good standing and authorized to do business in each jurisdiction where
failure to do so might have a material adverse impact on the consolidated
assets, condition or prospects of Borrower; or

         (g) Borrower, any Subsidiary, any general partner or joint venturer of
Borrower, or any guarantor shall die, become incompetent, dissolve, liquidate,
merge, consolidate, or cease to be in existence for any reason; or any general
partner or joint venturer of Borrower shall withdraw or notify any partner or
joint venturer of Borrower of its or his/her intention to withdraw as a partner
or joint venturer (or to become a limited partner) of Borrower; or any general
or limited partner or joint venturer of Borrower shall fail to make any
contribution required by the partnership or joint venture agreement of Borrower
as and when due under such agreement; or there shall be any change in the
partnership or joint venture agreement of Borrower from that in force on the
date hereof which may have a material adverse impact on the ability of Borrower
to repay this Note, or

         (h) any person or entity presently not in control of a corporate,
partnership or joint venture Borrower, any corporate general partner or joint
venturer of Borrower, or any guarantor, shall obtain control directly or
indirectly of Borrower, such a corporate general partner or joint venturer, or
any guarantor, whether by purchase or gift of stock or assets, by contract, or
otherwise; or

         (i) any proceeding (judicial or administrative) shall be commenced
against Borrower, any Subsidiary, any general partner or joint venturer of
Borrower, or any guarantor, or with respect to any assets of Borrower, any
Subsidiary, any general partner or joint venturer of Borrower, or any guarantor
which shall threaten to have a material and adverse effect on the assets,
condition or

                                       6


<PAGE>   7

prospects of Borrower, any Subsidiary, any general partner or joint venturer of
Borrower, or any guarantor; or final judgment(s) and/or settlement(s) in an
aggregate amount in excess of One Hundred Thousand UNITED STATES DOLLARS
($100,000.00) in excess of insurance for which the insurer has confirmed
coverage in writing, a copy of which writing has been furnished to Lender, shall
be entered or agreed to in any suit or action commenced against Borrower, any
Subsidiary, any general partner or joint venturer of Borrower or any guarantor;
or

         (j) Borrower shall grant or any person (other than Lender) shall obtain
a security interest in any collateral for this Note; Borrower or any other
person shall perfect (or attempt to perfect) such a security interest; a court
shall determine that Lender does not have a first-priority security interest in
any of the collateral for this Note enforceable in accordance with the terms of
the related documents; or any notice of a federal tax lien against Borrower or
any general partner or joint venturer of Borrower shall be filed with any public
recorder; or

         (k) there shall be any material loss or depreciation in the value of
any collateral for this Note for any reason, or Lender shall otherwise
reasonably deem itself insecure; or, unless expressly permitted by the related
documents, all or any part of any collateral for this Note or any direct,
indirect, legal, equitable or beneficial interest therein is assigned,
transferred or sold without Lender's prior written consent; or

         (l) any bankruptcy, insolvency, reorganization, arrangement,
readjustment, liquidation, dissolution, or similar proceeding, domestic or
foreign, is instituted by or against Borrower, any Subsidiary, any general
partner or joint venturer of Borrower, or any guarantor; or Borrower, any
Subsidiary, any general partner or joint venturer of Borrower, or any guarantor
shall take any steps toward, or to authorize, such a proceeding; or

         (m) Borrower, any Subsidiary, any general partner or joint venturer of
Borrower, or any guarantor shall become insolvent, generally shall fail or be
unable to pay its debts as they mature, shall admit in writing its inability to
pay its debts as they mature, shall make a general assignment for the benefit of
its creditors, shall enter into any composition or similar agreement, or shall
suspend the transaction of all or a substantial portion of its usual business.

7.       DEFAULT REMEDIES.

         (a) Upon the occurrence and during the continuance of any Event of
Default specified in Section 6(a)-(k), Lender at its option may declare this
Note (principal, interest and other amounts) immediately due and payable without
notice or demand of any kind. Upon the occurrence of any Event of Default
specified in Section 6(l)-(m), this Note (principal, interest and other amounts)
shall be immediately and automatically due and payable without action of any
kind on the part of Lender. Upon the occurrence and during the continuance of
any Event of Default, Lender may exercise any rights and remedies under this
Note, any related document or instrument (including without limitation any
pertaining to collateral), and at law or in equity.

         In addition, without limiting the Lender's right to accelerate this
Note as provided above, if an Event of Default occurs and is continuing under
Section 6(a)-(k) (including without limitation 

                                       7

<PAGE>   8

failure to furnish or cause to be furnished financial statements as required by
this Note or any related document), then, at the Lender's election and beginning
five (5) days after written notice of such an Event of Default is given by
Lender and continuing until such Event of Default is no longer continuing and
the Lender is aware of such fact, the interest rate hereunder shall increase by
one quarter of one percent (.25%) during the first thirty (30) day period
beginning five (5) days after such notice is given, and increase (cumulatively)
by an additional one quarter of one percent (.25%) during and effective with
respect to each thirty (30) day period thereafter during which such Event of
Default continues. The increased interest rate(s) provided for in the previous
sentence shall apply to the entire outstanding principal balance hereunder, and
the interest rate shall revert to the otherwise applicable interest rate
effective on the date on which the Event of Default is no longer continuing and
the Lender is aware of such fact; the provisions of this sentence and the
preceding sentence shall not apply if this Note is covered by Regulation Z of
the Federal Reserve Board (Truth in Lending) or any like disclosure requirement.

         (b) Lender may, by written notice to Borrower, at any time and from
time to time, waive any Event of Default or "Unmatured Event of Default" (as
defined below), which shall be for such period and subject to such conditions as
shall be specified in any such notice. In the case of any such waiver, Lender
and Borrower shall be restored to their former position and rights hereunder,
and any Event of Default or Unmatured Event of Default so waived shall be deemed
to be cured and not continuing; but no such waiver shall extend to or impair any
subsequent or other Event of Default or Unmatured Event of Default. No failure
to exercise, and no delay in exercising, on the part of Lender of any right,
power or privilege hereunder shall preclude any other or further exercise
thereof or the exercise of any other right, power or privilege. The rights and
remedies of Lender herein provided are cumulative and not exclusive of any
rights or remedies provided by law. "Unmatured Event of Default" means any event
or condition which would become an Event of Default with notice or the passage
of time or both.

8.       NO INTEREST OVER LEGAL RATE.

         Borrower does not intend or expect to pay, nor does Lender intend or
expect to charge, accept or collect any interest which, when added to any fee or
other charge upon the principal which may legally be treated as interest, shall
be in excess of the highest lawful rate. If acceleration, prepayment or any
other charges upon the principal or any portion thereof, or any other
circumstance, result in the computation or earning of interest in excess of the
highest lawful rate, then any and all such excess is hereby waived and shall be
applied against the remaining principal balance. Without limiting the generality
of the foregoing, and notwithstanding anything to the contrary contained herein
or otherwise, no deposit of funds shall be required in connection herewith which
will, when deducted from the principal amount outstanding hereunder, cause the
rate of interest hereunder to exceed the highest lawful rate.

9.       PAYMENTS, ETC.

         All payments hereunder shall be made in immediately available funds,
and shall be applied first to accrued interest and then to principal; however,
if an Event of Default occurs, Lender may, in its sole discretion, and in such
order as it may choose, apply any payment to interest, principal 

                                       8

<PAGE>   9

and/or lawful charges and expenses then accrued. Borrower shall receive
immediate credit on payments received during Lender's normal banking hours if
made in cash, immediately available funds, or by debit to available balances in
an account at Lender; otherwise payments shall be credited after clearance
through normal banking channels. Borrower authorizes Lender to charge any
account of Borrower maintained with Lender for any amounts of principal,
interest, taxes, duties, or other charges or amounts due or payable hereunder,
with the amount of such payment subject to availability of collected balances in
Lender's discretion; unless Borrower instructs otherwise, all Loans shall be
credited to an account(s) of Borrower with Lender. LENDER AT ITS OPTION MAY MAKE
LOANS HEREUNDER UPON TELEPHONIC INSTRUCTIONS AND IN SO DOING SHALL BE FULLY
ENTITLED TO RELY SOLELY UPON INSTRUCTIONS, INCLUDING WITHOUT LIMITATION
INSTRUCTIONS TO MAKE TRANSFERS TO THIRD PARTIES, REASONABLY BELIEVED BY LENDER
TO HAVE BEEN GIVEN BY AN AUTHORIZED PERSON, WITHOUT INDEPENDENT INQUIRY OF ANY
TYPE. All payments shall be made without deduction for or on account of any
present or future taxes, duties or other charges levied or imposed on this Note
or the proceeds. Lender or Borrower by any government or political subdivision
thereof. Borrower shall upon request of Lender pay all such taxes, duties or
other charges in addition to principal and interest, including without
limitation all documentary stamp and intangible taxes, but excluding income
taxes based solely on Lender's income.

10.      SETOFF.

         At any time and without notice of any kind, any account, deposit or
other indebtedness owing by Lender to Borrower, and any securities or other
property of Borrower delivered to or left in the possession of Lender or its
nominee or bailee, may be set off against and applied in payment of any
obligation hereunder, whether due or not.

11.      NOTICES.

         All notices, requests and demands to or upon the respective parties
hereto shall be deemed to have been given or made when deposited in the mail,
postage prepaid, addressed if to Lender to its ________ banking office indicated
above (Attention: Division Head, Lending Division), and if to Borrower to its
address set forth below, or to such other address as may be hereafter designated
in writing by the respective parties hereto or, as to Borrower, may appear in
Lender's records.

12.      MISCELLANEOUS.

         This Note and any document or instrument executed in connection
herewith shall be governed by and construed in accordance with the internal law
of the State of Florida, and shall be deemed to have been executed in the State
of Florida. Unless the context requires otherwise, wherever used herein the
singular shall include the plural and vice versa, and the use of one gender
shall also denote the other. Captions herein are for convenience of reference
only and shall not define or limit any of the terms or provisions hereof;
references herein to Sections or provisions without reference to the document in
which they are contained are references to this Note. This Note shall bind
Borrower, its heirs, trustees (including without limitation successor and
replacement

                                       9
<PAGE>   10

trustees), executors, personal representatives, successor and assigns, and shall
inure to the benefit of Lender, its successors and assigns, except that Borrower
may not transfer or assign any of its rights or interest hereunder without the
prior written consent of Lender. Borrower agrees to pay upon demand all expenses
(including without limitation attorneys' fees, legal costs and expenses, and
time charges of attorneys who may be employees of Lender, in each case whether
in or out of court, in original or appellate proceedings or in bankruptcy)
incurred or paid by Lender or any holder hereof in connection with the
enforcement or preservation of its rights hereunder or under any document or
instrument executed in connection herewith. Borrower expressly and irrevocably
waives notice of dishonor or default as well as presentment, protest, demand and
notice of any kind in connection herewith. If there shall be more than one
person or entity constituting Borrower, each of them shall be primarily, jointly
and severally liable for all obligations hereunder.

13.      WAIVER OF JURY TRIAL, ETC.

         BORROWER HEREBY IRREVOCABLY AGREES THAT, SUBJECT TO LENDER'S SOLE AND
ABSOLUTE ELECTION, ALL SUITS, ACTIONS OR OTHER PROCEEDINGS WITH RESPECT TO,
ARISING OUT OF OR IN CONNECTION WITH THIS NOTE OR ANY DOCUMENT OR INSTRUMENT
EXECUTED IN CONNECTION HEREWITH SHALL BE SUBJECT TO LITIGATION IN COURTS HAVING
SITUS WITHIN OR JURISDICTION OVER THE STATE OF FLORIDA. BORROWER HEREBY CONSENTS
AND SUBMITS TO THE JURISDICTION OF ANY LOCAL, STATE OR FEDERAL COURT LOCATED IN
OR HAVING JURISDICTION OVER SUCH STATE, AND HEREBY IRREVOCABLY WAIVES ANY RIGHT
IT MAY HAVE TO REQUEST OR DEMAND TRIAL BY JURY, TO TRANSFER OR CHANGE THE VENUE
OF ANY SUIT, ACTION OR OTHER PROCEEDING BROUGHT BY LENDER IN ACCORDANCE WITH
THIS PARAGRAPH, OR TO CLAIM THAT ANY SUCH PROCEEDING HAS BEEN BROUGHT IN AN
INCONVENIENT FORUM.

| |      See Rider attached hereto and incorporated herein by reference.

         Lender is hereby authorized by Borrower without notice to Borrower to
fill in any blank spaces and dates and strike inapplicable terms herein or in
any related document to conform to the terms upon which the Loan(s) evidenced
hereby are or may be made, for which purpose Lender shall be deemed to have been
granted an irrevocable power of attorney coupled with an interest.

         Florida documentary stamp tax required by law in the amount of $N/A has
been paid or will be paid directly to the Department of Revenue. Certificate of
Registration No. _______.


                                             Address for Notices:


SUN HYDRAULICS CORPORATION,                  1500 University Parkway
a Florida Corporation                        Sarasota, FL 34243
                                             Attention:
                                                       --------------------
By:      /s/ Jean A. Snyder
    ----------------------------
             Jean A. Snyder
Title: Corporate Accounts Manager 





                                       10

<PAGE>   1
                                                                    EXHIBIT 4.23


                             MODIFICATION AGREEMENT
                             ----------------------

         THIS AGREEMENT, entered into on March 1st, 1998, between SUN HYDRAULICS
CORPORATION, a Florida corporation ("Mortgagor"), whose post office address is
1500 University Parkway, Sarasota, FL  34243, and NORTHERN TRUST BANK OF
FLORIDA, N.A. ("Mortgagee"), whose post office address is 1515 Ringling
Boulevard, Sarasota, FL  34236.

                                  WITNESSETH:

         WHEREAS, Mortgagee is the owner and holder of a promissory note in the
original principal amount of $6,187,000.00 dated June 14, 1996 ("Note"), and

         WHEREAS, the Note is secured by a real estate mortgage recorded in
Official Records Book 1494, Page 6860, Public Records of Manatee County,
Florida, and in Official Records Book 2894, Page 2289, Public Records of
Sarasota County, Florida ("Mortgage"), by an assignment of leases recorded in
Official Records Book 1494, Page 6872, Public Records of Manatee County,
Florida, and in Official Records Book 2894, Page 2301, Public  Records of
Sarasota County, Florida ("Assignment of Leases"), and by a UCC-1 Financing
Statement recorded in Official Records Book 1494, Page 6878 Public Records of
Manatee County, Florida, and in Official Records Book 2894, Page 2307, 
Public Records of Sarasota County, Florida, and filed with the Florida 
Secretary of State, file #96-0000129270 ("UCC-1") and

         WHEREAS, Mortgagor is the owner of the property encumbered by the
Mortgage, which is more particularly described in Exhibit "A" attached hereto
("Property"), and the parties desire to modify the Note and Mortgage as
hereinafter provided, 

         NOW, THEREFORE, in consideration of the sum of One Dollar ($1.00) and
other valuable considerations, and of the covenants and agreements of Mortgagor
and Mortgagee, it is agreed as follows:

         1.  The terms of the Note have been modified on even date herewith, as
evidenced by modification note executed by Mortgagor ("Modification Note").
The unpaid principal balance of the Modification Note, together with accrued
interest thereon, will be due and payable July 1, 2006.  The Modification Note
replaces the Note and is secured by the Mortgage, Assignment of Leases and
UCC-1. All references to the Note contained in the Mortgage, Assignment of
Leases, or any other loan document shall be deemed to refer to the Modification
Note. 

         2.  This Agreement is intended solely as a modification of the
existing Mortgage, and not as a novation thereof.  It is the full purpose and
intent of the parties hereto that the priority of the Mortgage remain effective
as the original recording date and time of the Mortgage. 

         3.   Mortgagor hereby warrants to Mortgagee that there are no recorded
or unrecorded mortgages, liens, or other encumbrances against the Property other
than the Mortgage. 

         4.  Mortgagor agrees to keep and perform fully all of the terms,
covenants and conditions of the Modification Note and Mortgage as modified
hereby.  All terms, covenants and conditions of the Mortgage which are not
inconsistent herewith are hereby expressly confirmed, ratified and declared to
be in full force and effect. 

         5.  State of Florida documentary stamps in the amount required by law
were affixed to the Mortgage and were cancelled pursuant to law.  The
Modification Note qualifies for the exemption provided for in ss. 201.09,
Florida Statutes, and therefore, no additional documentary stamps are now due or
payable; however, in the event that the Department of Revenue, its agents or
<PAGE>   2
employees, notifies either Mortgagor or Mortgagee that the transaction which
is the subject of this Modification Agreement is subject to payment of
documentary stamp tax, intangible tax, or any other such tax, then, in such
event, Mortgagor agrees to immediately remit to the Department of Revenue or to
the Mortgagee the full amount of such tax deemed to be due and payable as
requested by the Department of Revenue.  Mortgagor may contest any liability
for such tax payment; however, any such contest shall be taken solely at the
election, cost, and expense of Mortgagor.  The liability of Mortgagor under
this provision shall survive the satisfaction of the obligations referenced
hereunder.  Any failure of Mortgagor to comply with the terms and provisions of
this section shall constitute a default under the Modification Note, Mortgage,
and all other loan documents executed in connection therewith.

         6.       For and in consideration of Mortgagee's agreement to modify
the terms of Mortgagor's loan as set forth in this Agreement, Mortgagor hereby
waives any and all claims, causes of action, and defenses which it may have
against Mortgagee arising prior to the execution of this Agreement and agrees
to hold Mortgagee, its employees, officers, and agents harmless from all
matters, claims, and liabilities existing or arising prior to the date hereof,
Mortgagor acknowledges, represents, and warrants to Mortgagee that Mortgagor
has no right of offset against the indebtedness evidenced by the Modification
Note nor defenses or claims against Mortgage with respect to the Note,
Mortgage, Modification Note, this Agreement, or any other loan documents
executed in connection with any of the foregoing, or any other transaction or
course of dealing between Mortgagor and Mortgagee arising out of or relating in
any way to same.

         IN WITNESS WHEREOF, the parties hereto have executed this agreement as
of the date and year first above written.


                                    SUN HYDRAULICS CORPORATION,
                                    a Florida corporation


                                    By: /s/ Clyde G. Nixon
                                        ---------------------------------------
                                            Clyde G. Nixon 
                                            As its President


                                    SUNINCO, INC., a Florida corporation

                                    By: /s/ Clyde G. Nixon
                                        ---------------------------------------
                                            Clyde G. Nixon 
                                            As its President


                                                      MORTGAGOR


                                    NORTHERN TRUST BANK OF FLORIDA, N.A.


                                    By: /s/ Terence E. McGannon
                                        ---------------------------------------
                                            Terence E. McGannon
                                            As its Vice President


                                                      MORTGAGEE

                                       2

<PAGE>   1
                                                                    EXHIBIT 4.24

                               MODIFICATION NOTE

$4,965,524.51                                                     March 1, 1998


         FOR VALUE RECEIVED, SUN HYDRAULICS CORPORATION, a Florida corporation
("Maker"), hereby promises, jointly and severally, to pay to the order of
NORTHERN TRUST BANK OF FLORIDA, N.A. ("Lender") at 1515 Ringling Boulevard,
Sarasota, FL 34236, or at such other place as the holder hereof may from time
to time designate in writing, the principal sum of Four Million Nine Hundred
Sixty Five Thousand Five Hundred Twenty Four and 51/100 Dollars
($4,965,524.51), or so much thereof as may be disbursed by Lender to Maker or
for Maker's account from time to time, together with interest at the rate
hereinafter specified on such indebtedness as shall from time to time remain
unpaid, until paid in full, such principal and interest being payable in lawful
money of the United States which shall be legal tender in payment of all debts
at the time of payment.  Interest will be calculated on the basis of a 365/360
method, which computes a daily amount of interest for a hypothetical year of 360
days, then multiplies such amount by the actual number of days elapsed in an
interest calculating period.

         Interest on the unpaid principal sum outstanding from time to time
shall accrue at a fixed rate of seven and seven-eighths percent (7.875%) per
annum.

         Principal and interest on the loan shall be due and payable in equal
monthly installments of $43,072.18, the first such installment to be due and
payable April 1, 1998, with subsequent installments to be due and payable on
the same day of every month thereafter until July 1, 2006, on which date the
then remaining unpaid principal balance, together with all accrued but unpaid
interest, shall be due and payable.

         All payments made hereunder shall be applied first to accrued interest
then due and owing; next to amounts expended by Lender to cure any default
under this Note, the Mortgage (as hereinafter defined), or any other loan
documents executed in connection herewith; next to charges, costs, expenses, or
attorneys' fees then due and payable to Lender under this Note, the Mortgage,
or any other loan documents; and the balance, if any, to principal.

         This Note may be prepaid, in whole or in part, at any time without
penalty.  All prepayments made hereunder shall be applied in the same manner as
other payments made hereunder, as set forth above.  The making of any
prepayment shall not relieve Maker from the obligation to make the payments
next due hereunder on a timely basis.

         If any payment is more than fifteen (15) days late, Maker agrees to
pay to Lender a late charge equal to five percent (5%) of the payment.

         This Note is secured by a mortgage and security agreement (the
"Mortgage") dated June 14, 1996 made by maker in favor of Lender encumbering
real property and personal property described therein (the "Mortgaged
Property") located in Manatee and Sarasota Counties, Florida.

         The entire unpaid principal balance hereof together with all accrued
interest due shall, at Lender's sole option, become immediately due and payable
in the event of the sale or transfer of (i) all or any part of the Mortgaged
Property, or any interest therein, or (ii) any beneficial or ownership interest
in Maker, whether held or owned directly or indirectly (if Maker, or any of
them, is not a natural person or persons, but is a corporation, partnership,
trust, estate or other legal entity).

         Each and every party to this Note, whether as Maker, endorser, surety,
guarantor, or otherwise ("Obligor"), hereby waives all rights of homestead and
other exemptions granted by the constitution or laws of Florida, and further
waives presentment, demand, protest, notice of dishonor, notice of nonpayment,
notice of protest, and diligence in collection, and assents to the terms hereof
and to any extension or postponement of the time of payment or any other
indulgence.  It is further specifically agreed that this Note or any part of
the principal or interest due hereon may be renewed, modified or extended, in
whole or in part, such modification to include but not be limited to changes in
payment schedules and interest rates, from time to time by the holder of this
Note, at the request of the then owners of all or part of the Mortgaged
Property, or at the request of any party bound hereon or who has assumed or may
hereafter assume payment hereof, without the consent of or notice to other
parties bound hereon and without releasing them from any liabilities then
existing.
<PAGE>   2
        Each and every Obligor hereby consents that the real or personal
property securing this Note, or any part of such security, may be released,
exchanged, added to or substituted for by Lender, without in any way modifying,
altering, releasing, affecting or limiting their respective liabilities or the
lien of the Mortgage, and further agrees that Lender shall not be required first
to institute any suit, or to exhaust any of its remedies against Maker or any
other person or party liable or to become liable hereunder, in order to enforce
payment of this Note, and further agrees that Maker or any other party liable
hereunder may be released by Lender from any or all liability under this Note
and such release shall in no way affect or modify the liability of the remaining
parties hereto.

        Each and every Obligor hereby consents and agrees that he is bound,
jointly and severally, under the terms hereof and is subject to all of the
provisions set forth herein as fully as though each was an undersigned hereof,
and further consents and agrees that any Obligor may be sued by Lender without
joining any other Obligor, whether primarily or secondarily liable.

        Notwithstanding anything contained herein to the contrary or in the
Mortgage, or other loan documents executed in connection herewith, no payee or
holder of this Note shall ever be entitled to receive, collect or apply as
interest on the obligation evidenced hereby any amount in excess of the maximum
rate of interest permitted to be charged by applicable law and, in the event
Lender or any holder hereof ever receives, collects or applies as interest any
such excess, such amount which would be excessive interest shall be applied to
the reduction of the principal sum; and, if the principal sum is paid in full,
any remaining excess shall forthwith be paid to Maker.  In determining whether
or not the interest paid or payable under any specific contingency exceeds the
highest lawful rate, Maker and Lender shall, to the maximum extent permitted
under applicable law; (a) characterize any non-principal payment as an expense,
fee or premium rather than as interest; (b) exclude voluntary prepayments and
the effects thereof; and (c) spread the total amount of interest, or charges in
the nature of interest, pursuant to applicable law.

        As used herein, "Event of Default" shall mean the occurrence of any of
the following events or conditions:  (a) failure or omission to pay when due
this Note (or any installment of principal or interest hereunder) within fifteen
(15) days after payment is due; (b) default in the payment (other than payment
of principal and interest) or performance of any obligation, covenant, agreement
or liability contained or referred to in the Mortgage, this Note, or any loan
document executed in connection herewith, or upon the existence or occurrence of
any circumstance or event deemed a default under this Note or any loan document
executed in connection herewith; (c) any warranty, representation or statement
made or furnished by any Obligor to Lender for the purpose of inducing Lender to
make the loan evidenced by this Note, proves to have false in any material
respect when made or furnished; (d) a default under any other mortgage on the
Mortgaged Property (whether such other mortgage be held by Lender or by a third
party); (e) the institution of foreclsoure proceedings of another mortgage or
lien of any kind on the Mortgage Property (whether such other mortgage or lien
be held by Lender or by a third party); (f) the default by Maker or any party
obligated under this Note or any guaranty hereof or any affiliate of any of the
foregoing ("Affiliated Companies") in the payment or performance of any
obligation, covenant, agreement, or liability contained in any other mortgage,
note, obligation or agreement held by Lender; (g) the death, dissolution,
termination of existence, insolvency, or business failure of any Obligor; (h)
the appointment of a receiver of any part of the Mortgaged Property; (i) the
assignment for the benefit of creditors or the commencement of any proceedings
in bankruptcy or insolvency by or against any Obligor; (j) falsity in any
material respect of, or any material omission in, any representation or
statement made to Lender by or on behalf of any Obligor in connection with the
loan evidenced by this Note; (k) loss, theft, substantial damage, or
destruction, not covered by collectible insurance, of any of the Mortgaged
Property or any levy, seizure or attachment thereof; (l) the sale or transfer
of any of the Mortgaged Property; or (m) the mortgage, pledge, assignment, or
granting of a security interest in any of the Mortgaged Property.  Upon the
occurrence of any such default or at any time thereafter, subject to the grace
period, if any, provided in this Note, Lender may, at its option, declare the
whole amount of principal and interest provided for in and by this Note, and any
and all other secured indebtedness, immediately due and payable without demand
or notice of any kind to any person, and the same thereupon shall become
immediately due, payable and collectible (by foreclosure or otherwise) at once
and without notice to Maker. Any default hereunder shall constitute a default
under any other mortgage, note, obligation or agreement of Maker or any
Affiliated Company held by Lender.  The agreements contained in this paragraph
to create cross-defaults under all mortgages, notes, obligations and agreements
between Maker, and any

                                      2
<PAGE>   3
Affiliated Company and Lender, whether currently existing or hereafter created,
in the event of default under one or more of such mortgages, notes,
obligations, or agreements are a material and specific inducement and
consideration for the making by Lender of the loan evidenced by this Note.

        Notwithstanding the provisions of the foregoing paragraph to the
contrary, in the event of a non-monetary default of the type set forth in
subsections (b), (d) or (e) of the foregoing paragraph, then prior to Lender
precipitating to maturity the full unpaid balance of this Note or otherwise
exercising any rights available to Lender under the terms of this Note or any
other loan document executed in connection herewith, Lender shall give written
notice to Maker and Maker shall have a period of thirty (30) days from the date
such notice is given in which to cure within said 30 day period, and such
default does not threaten to impair Lender's security for this Note, then the 30
day period, and such default does not threaten to impair Lender's security for
this Note, then the 30 day period shall be extended for such period as may be
reasonably necessary to complete the curing of same, provided that Maker
proceeds with all due diligence and continuity to cure the default.  Notice
required hereunder may, at the option of Lender, be given by either certified
mail, registered mail, regular mail, facsimile transmission, Federal Express or
other express courier, or by personal delivery, and shall be deemed given when
mailed, transmitted, placed with the courier or delivered to Borrower, whichever
is first.  In the event the default is not cured with the time provided, then
Lender shall have the right to accelerate this Note and proceed to enforce this
Note and the loan documents, without further notice to Maker.

         It is expressly agreed that upon the occurrence of an Event of Default,
or if Lender shall deem itself insecure (because the prospect of timely payments
is impaired, because the value of Lender's security is impaired, because the
prospect of performance of any covenant or agreement under this Note, the
Mortgage, or any other loan document is impaired, because of any change of
circumstance which adversely affects any matters orginally considered by Lender
in making the loan, or otherwise), then or at any time thereafter at the option
of Lender, the whole of the principal sum remaining unpaid hereunder, together
with all accrued and unpaid interest thereon, shall become due and payable
immediately without notice, anything contained herein to the contrary in any way
notwithstanding, and in any such event Lender shall have the right to set-off
against this Note all money owed by Lender in any capacity to any Obligor,
whether or not due, and Lender shall be deemed to have exercised such right of
set-off and to have made a charge against any such money immediately upon the
occurrence of an Event of Default although made or entered on the books
subsequent thereto.  From and after an Event of Default, the interest rate on
the entire outstanding principal balance hereunder shall accrue at the highest
rate permitted to be charged by applicable law ("Default Rate").  In the event
the Default Rate shall be applicable and Lender has not accelerated this Note,
the amount of each payment otherwise due hereunder shall be increased to an
amount equal to the regular amount of the principal installment due hereunder,
plus accrued interest at the Default Rate.

        Each Obligor shall be obligated to pay as part of the indebtedness
evidenced by this Note all costs of collection, whether or not a suit is
brought, including any reasonable attorneys' fees that may be incurred in the
collection or enforcement hereof.  The term "attorneys' fees" shall include but
not be limited to any such fees incurred in any appellate or related ancillary
or supplementary proceedings, whether before or after final judgment related to
the enforcement or defense of this Note.

        If at any time any federal, state, county or municipal government or
agency thereof shall impose any documentary stamp tax, intangible tax, or any
other type upon this Note or the Mortgage, or upon the indebtedness evidenced
hereby (other than any federal, state or local income tax imposed upon Lender),
then Maker shall pay same within fifteen (15) days after demand by Lender,
together with any interest and penalties thereon.

        Time is of the essence of this Note.  The remedies of Lender as provided
herein or in the Mortgage, or any other loan document executed in connection
herewith, shall be cumulative and concurrent, and may be pursued singularly,
successively or together, at the sole discretion of Lender, and may be exercised
as often as occasion therefor shall arise.  No act or omission of Lender,
including specifically any failure to exercise any right, remedy or recourse,
shall be deemed to be a waiver or release of such right, remedy or recourse, and
any waiver or release may be effected only through a written document executed
by Lender and then only to the extent specifically recited therein.  A waiver or
release with respect to any one event shall not be construed

                                      3
<PAGE>   4
as continuing as a bar to, or as a waiver or release of, any subsequent right,
remedy or recourse as to any subsequent event.

        The term "Lender" where used herein shall include Lender's successors
and assigns.  The term "Maker" shall include each person signing this Note,
jointly and severally, and their respective heirs, successors and assigns.  The
term "Obligor" shall include Maker and every person who is an endorser,
guarantor, or surety of this Note, or who is otherwise a party hereto, and
their respective heirs, successors and assigns.  The terms "person" and "party"
shall include individuals, firms, associations, joint ventures, partnerships,
estates, trusts, business trusts, syndicates, fiduciaries, corporations, and
all other groups or combinations.  Whenever used herein, the singular number
shall include the plural, the plural the singular, and the use of any gender
shall include all genders.  This Note shall be construed under Florida law.

        This is a modification of that certain note dated June 14, 1996 in the
original principal amount of $6,187,000.00.  State of Florida documentary
stamps in the amount required by law were paid on the mortgage securing the
note which this Note modifies, and were cancelled pursuant to law.  No further
State documentary stamps are required.

        IN WITNESS WHEREOF, Maker has caused this Note to be duly executed and
delivered as of the date first above written.

Maker's Address:

1500 University Parkway                 SUN HYDRAULICS CORPORATION,
Sarasota, FL 34243                      a Florida corporation



                                        By: /s/ Clyde G. Nixon
                                           -----------------------
                                                Clyde G. Nixon
                                                As its President


                                      4

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEETS AND CONSOLIDATED STATEMENTS OF THE REGISTRANT AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                           2,967
<SECURITIES>                                         0
<RECEIVABLES>                                    6,175<F1>
<ALLOWANCES>                                         0
<INVENTORY>                                      6,503
<CURRENT-ASSETS>                                   732
<PP&E>                                          40,183<F2>
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                  56,673
<CURRENT-LIABILITIES>                            9,289
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             6
<OTHER-SE>                                      36,538
<TOTAL-LIABILITY-AND-EQUITY>                    56,673
<SALES>                                         19,133
<TOTAL-REVENUES>                                19,133
<CGS>                                           13,347
<TOTAL-COSTS>                                   13,347
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 260
<INCOME-PRETAX>                                  2,469
<INCOME-TAX>                                       829
<INCOME-CONTINUING>                              1,640
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     1,640
<EPS-PRIMARY>                                      .26
<EPS-DILUTED>                                      .25
<FN>
<F1>Net of allowance for doubtful amounts of $44.
<F2>Net of accumulated depreciation of $16,314.
</FN>
        

</TABLE>


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