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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13D
                               (Amendment No. 2)*
                                       of
                           Tweedy, Browne Company L.P.


                                  SCHEDULE 13D
                               (Amendment No. 2)*
                                       of
                               TBK Partners, L.P.


                                  SCHEDULE 13D
                               (Amendment No. 2)*
                                       of
                            Vanderbilt Partners, L.P.



                    Under the Securities Exchange Act of 1934

                             MATRIX SERVICE COMPANY
                                (Name of Issuer)


                     Common Stock, Par Value $0.01 per Share
                         (Title of Class of Securities)

                                    576853105
                                 (CUSIP Number)



                                 John D. Spears
                              52 Vanderbilt Avenue
                            New York, New York 10017
                                 (212) 916-0600
                 (Name, Address and Telephone Number of Persons
                Authorized to Receive Notices and Communications)


                                JANUARY 29, 1997
             (Date of Event which Required Filing of this Statement)



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If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [ ].

Check the following box if a fee is paid with the statement [ ]. (A fee is not
required only if the reporting person: (1) has a previous statement on file
reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act,
but shall be subject to all the provisions of the Act (however, see the Notes).
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                                  SCHEDULE 13D

CUSIP No. 576853105                                         Page __ of __ Pages
- --------------------------------------------------------------------------------
1       NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                Tweedy, Browne Company L.P. ("TBC")
- --------------------------------------------------------------------------------
2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*               (a) / /
                                                                        (b) /X/
- --------------------------------------------------------------------------------
3       SEC USE ONLY

- --------------------------------------------------------------------------------
4       SOURCE OF FUNDS*

                00
- --------------------------------------------------------------------------------
5       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEMS 2(d) or 2(E)                                               / /
- --------------------------------------------------------------------------------
6       CITIZENSHIP OR PLACE OF ORGANIZATION

                Delaware
- --------------------------------------------------------------------------------
                7       SOLE VOTING POWER
                                TBC has sole voting power with respect to
                        555,555 shares held in certain TBC accounts (as
                        hereinafter defined). Additionally, certain of the
                        general partners of TBC may be deemed to have sole power
                        to vote certain shares as more fully set forth herein.
  NUMBER OF     ----------------------------------------------------------------
   SHARES       8       SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                      0 shares
    EACH        ----------------------------------------------------------------
 REPORTING      9       SOLE DISPOSITIVE POWER
   PERSON                       0 shares, except that certain of the general
    WITH                partners of TBC may be deemed to have sole power to
                        dispose of certain shares as more fully set forth
                        herein.
                ----------------------------------------------------------------
                10      SHARED DISPOSITIVE POWER
                                609,695 shares held in accounts of TBC (as 
                        hereinafter defined).
- --------------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                609,695 shares
- --------------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXLUDES CERTAIN SHARES*
                                                                            / /
- --------------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                6.57%
- --------------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*

                BD, IA & PN
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


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                                  SCHEDULE 13D

CUSIP No. 576853105                                         Page __ of __ Pages
- --------------------------------------------------------------------------------
1       NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                TBK Partners, L.P. ("TBK")   
- --------------------------------------------------------------------------------
2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*               (a) / /
                                                                        (b) /X/
- --------------------------------------------------------------------------------
3       SEC USE ONLY

- --------------------------------------------------------------------------------
4       SOURCE OF FUNDS*

                WC and BK
- --------------------------------------------------------------------------------
5       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEMS 2(d) or 2(E)                                               / /
- --------------------------------------------------------------------------------
6       CITIZENSHIP OR PLACE OF ORGANIZATION

                Delaware
- --------------------------------------------------------------------------------
                7       SOLE VOTING POWER
                                10,000 shares, except that the general partners
                        in TBK, solely by reason of their positions, as such 
                        may be deemed to have shared power to vote these shares.
  NUMBER OF     ----------------------------------------------------------------
   SHARES       8       SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                      0 shares
    EACH        ----------------------------------------------------------------
 REPORTING      9       SOLE DISPOSITIVE POWER
   PERSON                       10,000 shares, except that the general partners,
    WITH                solely by reason of their positions as such, may be
                        deemed to have shared power to vote these shares.
                ----------------------------------------------------------------
                10      SHARED DISPOSITIVE POWER
                                0 shares
- --------------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                10,000 shares
- --------------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXLUDES CERTAIN SHARES*
                                                                            / /
- --------------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                0.11%
- --------------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*

                PN
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


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                                  SCHEDULE 13D

CUSIP No. 576853105                                         Page 5 of 16 Pages
- --------------------------------------------------------------------------------
1       NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                Vanderbilt Partners, L.P. ("Vanderbilt")
- --------------------------------------------------------------------------------
2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*               (a) / /
                                                                        (b) /X/
- --------------------------------------------------------------------------------
3       SEC USE ONLY

- --------------------------------------------------------------------------------
4       SOURCE OF FUNDS*

                WC and BK
- --------------------------------------------------------------------------------
5       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEMS 2(d) or 2(E)                                               / /
- --------------------------------------------------------------------------------
6       CITIZENSHIP OR PLACE OF ORGANIZATION

                Delaware
- --------------------------------------------------------------------------------
                7       SOLE VOTING POWER

                                0 shares
  NUMBER OF     ----------------------------------------------------------------
   SHARES       8       SHARED VOTING POWER
BENEFICIALLY
  OWNED BY                      0 shares
    EACH        ----------------------------------------------------------------
 REPORTING      9       SOLE DISPOSITIVE POWER
   PERSON                 
                                0 shares
                ----------------------------------------------------------------
                10      SHARED DISPOSITIVE POWER
                                0 shares
- --------------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                0 shares
- --------------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXLUDES CERTAIN SHARES*
                                                                            / /
- --------------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                0%
- --------------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*

                PN
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


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PRELIMINARY NOTE

         The persons filing this Amendment No. 2 are (i) Tweedy, Browne Company
L.P. ("TBC"), a Delaware limited partnership, (ii) TBK Partners, L.P. ("TBK"), a
Delaware limited partnership and (iii) Vanderbilt Partners, L.P. ("Vanderbilt"),
a Delaware limited partnership. This Amendment No. 2 amends a Statement on
Schedule 13D filed by TBC, TBK and Vanderbilt dated February 12, 1996 (the
"Statement"). The filing of this Amendment No. 2 should not be deemed an
admission that TBC, TBK and Vanderbilt comprise a group within the meaning of
Section 13(d)(3) of the Securities and Exchange Act of 1934, as amended
(the"Act").

         This Amendment No. 2 relates to the Common Stock, $0.01 par value (the
"Common Stock"), of Matrix Service Company (the "Company"), which, to the best
knowledge of the persons filing this Amendment No. 2, is a company organized
under the laws of Delaware, with its principal executive offices located at
10701 East Ute Street, Tulsa, Oklahoma 74116.

         This Amendment No. 2 contains information regarding shares of Common
Stock that may be deemed to be beneficially owned by TBC. Such shares are held
in the accounts of various customers of TBC, with respect to which it has
obtained sole or shared voting power.

         Other than as set forth below, to the best knowledge of TBC, TBK and
Vanderbilt, there has been no material change in the information set forth in
response to Items 1, 2, 3,4, 6 and 7 of the Statement, as amended. Accordingly,
those Items are omitted from this Amendment No. 2.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER

         (a) As of the date hereof, TBC may be deemed to be the beneficial owner
of an aggregate of 609,695 shares of Common Stock, which constitutes
approximately 6.57% of the 9,281,000 shares of Common Stock which TBC believes
to be the total number of shares of Common Stock outstanding. The TBC Shares are
held in the TBC Accounts.

         As of the date hereof, TBK beneficially owns 10,000 shares of Common
Stock, which constitutes approximately 0.11% of the 9,281,000 shares of Common
Stock which TBK believes to be the total number of shares of Common Stock
outstanding.

         As a result of the disposition of 12,500 shares of Common Stock in open
market transactions, as of the date hereof, Vanderbilt does not benefically own
any shares of Common Stock.

         Each of TBC, TBK and Vanderbilt disclaims that it is the beneficial
owner of any of the shares of Common Stock held in the TBC Accounts. The
aggregate number of shares of Common Stock with respect to which TBC, TBK and
Vanderbilt could be deemed to be the beneficial owner as of the date hereof, is
619,695 shares, which constitutes approximately 6.68% of the 9,281,000 shares of
Common Stock, which the filing persons believe to be the total number of shares
of Common Stock outstanding, but nothing contained herein shall be construed as
an admission that TBC is the beneficial owner of any of the TBC Shares.

         The aggregate number of shares and percentage of Common Stock with
respect to which each of the General Partners may be deemed to be the beneficial
owner by reason of his being a general partner of TBC, TBK and Vanderbilt,
respectively, is 619,695 shares, which constitutes approximately 6.68% of the
9,281,000 shares of Common Stock outstanding. The aggregate number of shares and
percentage of Common Stock with respect to which Thomas P. Knapp may be deemed
to be a beneficial owner by reason of his being a general partner of TBK is
10,000 shares of Common Stock which constitutes approximately 0.11% of the
9,281,000 shares of Common Stock outstanding. However, nothing contained herein
shall be construed as an admission that any of the General Partners or Thomas P.
Knapp is the beneficial owner of any shares of Common Stock, except as set forth
herein as expressly and admittedly being beneficially owned by a particular
General Partner or Thomas P. Knapp.






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         Each of TBC, TBK and Vanderbilt disclaims beneficial ownership of
Common Stock held by the other. Except as described herein, to the best
knowledge of TBC, TBK and Vanderbilt, no person who may be deemed to comprise a
group with any of TBC, TBK, Vanderbilt, or any other person named in Item 2
hereof, beneficially owns any shares of Common Stock.

         (b) TBC has investment discretion with respect to 609,695 shares of
Common Stock held by the TBC Accounts and has sole power to dispose or direct
the disposition of all of such shares. Of these shares of Common Stock, TBC has
sole power to vote or to direct the voting of 555,555 shares of Common Stock
held in certain TBC Accounts.

         Each of the General Partners of TBC, solely by reason of their
positions as such, may be deemed to have (i) shared power to dispose of or to
direct the disposition of all of the shares of Common Stock held in the TBC
Accounts; and (ii) shared power to vote or direct the vote of 555,555 shares of
Common Stock held in certain TBC Accounts.

         TBK has the sole power to vote or direct the voting of and dispose or
direct the disposition of the TBK Shares. Each of the General Partners and
Thomas P. Knapp, solely by reason of their positions as general partners, may be
deemed to have shared power to vote or direct the vote of and to dispose or
direct the disposition of the TBK Shares.

         Vanderbilt has the sole power to vote or direct the voting of and
dispose or direct the disposition of the Vanderbilt Shares. Each of the General
Partners of Vanderbilt, solely by reason of their positions as such, may be
deemed to have shared power to vote or direct the vote of and to dispose or
direct the disposition of the Vanderbilt Shares.

         (c) During the sixty day period ended as of the date hereof, TBK did
not effect any transactions in Common Stock. During the sixty day period ended
as of the date hereof, TBC and Vanderbilt sold shares of Common Stock in open
market transactions, as follows:

REPORTING NO. OF PRICE PERSON DATE SHARES SOLD PER SHARE TBC 11/21/96 5,100 $6 12/09/96 860 $5 5/8 01/29/97 17,500 $7 1/8 VANDERBILT 01/29/97 12,500 $7 1/8
(d) To the best knowledge of TBC, each of the persons maintaining an account with TBC has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of Common Stock held in said person's TBC Account. To the best knowledge of TBK, no person other than TBK has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the TBK Shares, except that the General Partners and Thomas P. Knapp may be deemed to have such rights and powers solely by reason of being general partners in TBK. To the best knowledge of Vanderbilt, no person other than Vanderbilt has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Vanderbilt Shares, except that the General Partners in Vanderbilt may be deemed to have such rights and powers solely by reason of being general partners in Vanderbilt. (e) Not applicable. 8 SIGNATURE Each of Tweedy, Browne Company L.P., TBK Partners, L.P. and Vanderbilt Partners, L.P., after reasonable inquiry and to the best of its knowledge and belief, hereby certifies that the information set forth in this Statement is true, complete and correct. TWEEDY, BROWNE COMPANY L.P. By_____________________________ Christopher H. Browne General Partner TBK PARTNERS, L.P. By_____________________________ Christopher H. Browne General Partner VANDERBILT PARTNERS, L.P. By_____________________________ Christopher H. Browne General Partner Dated: February 4, 1997