Document:

<PAGE>   1
                                                                   EXHIBIT 10(q)

                           NOTE MODIFICATION AGREEMENT

         NOTE MODIFICATION AGREEMENT made as of January 31, 2001 (the
"Agreement"), between PMC ACQUISITION, INC. DBA ABCO INDUSTRIES, a Texas
corporation referred to herein as the "Borrower" having its principal place of
business at 2819 Walnut Hill Lane, Dallas, Texas 75229, and BANK OF AMERICA,
N.A., a national banking association referred to herein as the "Lender" having
its principal place of business at 901 Main Street, 7th Floor, Dallas, Texas
75202-3714.

                                 R E C I T A L S

         A. The Lender has extended the Borrower a credit facility which is
presently evidenced by a promissory note in the original principal sum of
$2,000,000 made by the Borrower payable to the order of the Lender dated as of
May 30, 2000 (the "Note").

         B. The Note and all of the obligations of the Borrower thereunder are
secured by, among other things, liens against real and personal property of the
Borrower.

         C. The Lender is the holder and beneficial owner of the Note and all of
the security for the Note.

         D. The parties have agreed to modify the Note as hereinafter provided.

         NOW THEREFORE, in consideration of the above recitals and the covenants
and agreements of the parties hereto and for other good and valuable
consideration, the receipt, sufficiency and adequacy of which are hereby
acknowledged, the parties hereto agree as follows:

         1. MODIFICATION OF NOTE. (a) Section 1.A. of the Note is hereby amended
            to read in its entirety as follows:

                  "A. Procedure for Borrowing. The loan shall be made in a
         single advance by Bank to Borrower in the amount of Two Million Dollars
         ($2,000,000)."

                  (b) Section 1.B. of the Note is hereby amended to read in its
                      entirety as follows:

                  "B. Prime Rate Loans . Borrower agrees to pay interest
         (calculated on the basis of the actual days elapsed in a year
         consisting of 360 days) with respect to the unpaid principal amount of
         the Loan from the date hereof until maturity (whether by acceleration
         or otherwise) at a varying rate per annum equal to the lesser of (i)
         the Maximum Rate or (ii) the Prime Rate plus two and one-half percent
         (2 1/2%). The interest shall be payable on the last day of each Prime
         Rate Interest Period."

                  (c) Section 1.C. of the Note is hereby amended in its entirety
                      to read as follows:

                  "C. Intentionally Deleted."

                  (d) Section 1.E. of the Note is hereby amended in its entirety
                      to read as follows:

                                       1
<PAGE>   2

                  "E. Intentionally Deleted."

                  (e) Section 1.F. of the Note is hereby amended in its entirety
                      to read as follows:

                  "F. Intentionally Deleted."

                  (f) Section 1.G. of the Note is hereby amended in its entirety
                      to read as follows:

                  "G. Prepayment  of Loans. Borrower  may at any time and from
         time to time prepay the loan in whole or in part without premium or
         penalty."

                  (g) Section 1.H. of the Note is hereby amended in its entirety
                      to read as follows:

                  "H. Schedule I. Reference is made to Schedule I attached
         hereto for definitions applicable to the interest pricing options
         hereunder."

                  (h) Section 15 of the Note is hereby amended to read in its
         entirety as follows:

                  "15. Collateral. This Note is secured the liens and security
         interests granted in, and is entitled to the benefits of, (a) that
         certain Deed of Trust (with Security Agreement, Assignment of Rents and
         Leases and Financing Statement) dated as of May 30, 2000, executed by
         Borrower to Michael F. Hord, Trustee for the benefit of Bank, as the
         same shall hereafter be amended from time to time (the "Deed of Trust")
         which has been recorded at Volume 2512, Page 71 of the Deed of Trust
         Records of Taylor County, Texas; and (b) that certain Security
         Agreement executed by Borrower to Bank dated as of May 30, 2000, as the
         same shall hereafter be amended from time to time. Further, this Note
         is guaranteed pursuant to, and is entitled to the benefits of, that
         certain Unconditional Guaranty of Peerless Mfg. Co. dated as of May 30,
         2000, as amended by that certain First Amendment to Guaranty between
         Peerless Mfg. Co. and Bank dated as of January 31, 2001 (as the same
         shall hereafter be amended from time to time, the "Guaranty").

                  (i) Schedule I and Schedule II to the Note are amended in
         their entirety by substituting therefor Schedule I and Schedule II
         attached to this Agreement.

         2. CONFIRMATION OF CONTINUED EFFECTIVENESS OF SECURITY. The Borrower
         hereby confirms and agrees that all of the mortgages, deeds of trust,
         financing statements, and security agreements which presently secure
         the Note shall continue to secure, in the same manner and to the same
         extent provided therein, the payment and performance of the Note as
         modified by this Agreement.

         3. LIMITATION ON AGREEMENTS. The agreements set forth herein are
         limited precisely as written and shall not be deemed (i) to be a waiver
         or waivers of or a consent or consents to the modification of or
         deviation from any other term or condition of the Note or of any of the
         other instruments or agreements referred to therein, or (ii) to
         prejudice any right or rights which the Lender may now have or may have
         in the future under or in connection with the Note or any of the other
         instruments, agreements or other documents referred to therein.

         4. INCORPORATION OF CERTAIN PROVISIONS BY REFERENCE. The provisions of
         Section 11 of the Note captioned "Applicable Law, Venue and
         Jurisdiction" and of Section 16 of the Note captioned "Arbitration" are
         incorporated herein by reference for all purposes.

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<PAGE>   3

         5. NOTICE OF FINAL AGREEMENT. THIS WRITTEN AGREEMENT REPRESENTS THE
         FINAL AGREEMENT BETWEEN THE BORROWER AND THE LENDER AND MAY NOT BE
         CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL
         AGREEMENTS BETWEEN THE BORROWER AND THE LENDER. THERE ARE NO UNWRITTEN
         ORAL AGREEMENTS BETWEEN THE BORROWER AND THE LENDER.

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

                                          PMC ACQUISITION, INC.
                                          DBA ABCO INDUSTRIES

                                          By /s/
                                            ------------------------------------

                                          Title
                                               ---------------------------------

                                          BANK OF AMERICA, N.A.

                                          By /s/ Mark L. Henze
                                            ------------------------------------
                                            Mark L. Henze, Senior Vice President

                                       3
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                                   SCHEDULE I

                        INTEREST RATE PRICING DEFINITIONS

         The definitions set forth on this Schedule I are those which relate
solely to the interest rate pricing options under the Note.

         "BUSINESS DAY" means the normal banking hours during any day (other
than Saturdays or Sundays or legal holidays) that banks are legally open for
business in Dallas, Texas.

         "INTEREST PERIOD" means the period ending on the last day of each
calendar quarter, provided, however, that (i) if any Interest Period would end
on a day that is not a Business Day, such Interest Period shall end on the next
succeeding Business Day, and (ii) if any Interest Period would otherwise end
after the Maturity Date, such Interest Period shall end on the Maturity Date.

         "PRIME RATE" means the variable rate of interest per annum established
from time to time by Bank as its Prime Rate (which rate of interest may or may
not be the lowest rate or best charged by Bank on similar loans, and Bank may
make various commercial or other loans at rates of interest having no
relationship to such rate). Each change in the Prime Rate shall become effective
without prior notice to Borrower automatically as of the opening of business on
the date of such change in the Prime Rate.

                                   SCHEDULE II

                             INTENTIONALLY DELETED.

                                       4<PAGE>   1

                                                                   EXHIBIT 10(r)

                                   AMENDMENT D
                                       TO
                   EIGHTH AMENDED AND RESTATED LOAN AGREEMENT

         THIS AMENDMENT D TO EIGHTH AMENDED AND RESTATED LOAN AGREEMENT (this
"Amendment") is made as of January 31, 2001, between BANK OF AMERICA, N.A., a
national banking association (the "Bank"), and PEERLESS MFG. CO., a Texas
corporation (the "Borrower").

                                R E C I T A L S:

         A.  The Borrower and the Bank are parties to that certain Eighth
Amended and Restated Loan Agreement dated as of December 12, 1999 (the "Original
Loan Agreement"), as amended by that certain Amendment A to Eighth Amended and
Restated Loan Agreement dated as of February 25, 2000 ("Amendment A"), and as
amended by that certain Amendment B to Eighth Amended and Restated Loan
Agreement dated as of May 30, 2000 ("Amendment B"), and as amended by that
certain Amendment C to Eighth Amended and Restated Loan Agreement dated as of
November 30, 2000 ("Amendment C"). The Original Loan Agreement, Amendment A,
Amendment B and Amendment C are collectively referred to herein as the "Existing
Loan Agreement."

         B. The Borrower and the Bank desire to amend the Existing Loan
Agreement as herein set forth.

         NOW, THEREFORE, in consideration of the premises and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the Bank and the Borrower agree as follows:

1.           SAME TERMS. All terms used herein which are defined in the
Existing Loan Agreement shall have the same meanings when used herein, unless
the context hereof otherwise requires or provides. In addition, all references
in the Loan Documents to the "Agreement" shall mean the Existing Loan Agreement,
as amended by this Amendment, and as the same shall hereafter be amended from
time to time. All references to the "Line" and the "Note" in the Existing Loan
Agreement and the other Loan Documents shall mean the "Line" and the "Line of
Credit Note" each as defined in this Amendment. In addition, the following terms
have the meanings set forth below:

            "CHASE CONSENT": See Section 3.5.

            "EFFECTIVE DATE" means January 31, 2001, or such later date as the
Borrower has satisfied the conditions precedent specified in Section 3.0 of this
Amendment.

            "MODIFICATION PAPERS" means this Amendment, the Renewal Line of
Credit Note, the Notice of Final Agreement, the Officer's Certificate, the Chase
Consent, and all of the other documents and agreements executed in connection
with the transactions contemplated by this Amendment.

            "NOTICE OF FINAL AGREEMENT": See Section 3.7.

            "OFFICER'S CERTIFICATE": See Section 3.4

            "RENEWAL LINE OF CREDIT NOTE": See Section 3.3.

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<PAGE>   2

            AMENDMENTS TO AGREEMENT. On the Effective Date, the Existing Loan
Agreement shall be amended as follows:

2.          Amendment to Definitions.  Section 1. shall be amended by deleting
the letters before each of the paragraphs thereof. In addition, Section 1. shall
be amended by deleting therefrom the definition of "Collateral Policy." In
addition, Section 1. shall be amended by adding the following definition in
appropriate alphabetical order:

                  "'COLLATERAL AGENT' means Bank of America, N.A., in its
capacity as the collateral agent pursuant to the Intercreditor Agreement."

3.          Amendment of Section 2.A. Section 2.A. shall be amended to read in
its entirety as follows:

                  "A. LOAN. Bank hereby agrees to make (or has made) one or more
            loans to Borrower in the aggregate principal face amount of
            $5,500,000 (as such amount may be reduced, the `Line'), provided
            that the aggregate unpaid principal amount of all loans shall not at
            any time exceed the difference between (i) the Line, minus (ii) the
            undrawn amount of all outstanding Letters of Credit, minus (iii) the
            amount of all drawings under any Letter of Credit for which Bank has
            not been reimbursed. The obligation to repay the loans is evidenced
            by the Renewal Line of Credit Note in the original principal sum of
            $5,500,000 made by Borrower payable to the order of Bank dated as of
            January 31, 2001 (as modified and amended from time to time, the
            `Line of Credit Note' or `Note,' together with any and all renewals,
            extensions, or rearrangements thereof being hereafter collectively
            referred to as the `Note'), having a maturity date, repayment terms,
            and interest rate as set forth in the Note."

4.          Amendment of Section 2.A.iii.  Section 2.A.iii. shall be amended to
read in its entirety as follows:

                  "iii. LETTER OF CREDIT SUBFEATURE. As a subfeature under the
            Line, Bank may from time to time, up to and including August 31,
            2001, issue letters of credit for the account of Borrower (each, a
            `Letter of Credit' and collectively, `Letters of Credit'); provided,
            however, that the form and substance of each Letter of Credit shall
            be subject to approval by Bank in its sole discretion; and provided
            further that the aggregate undrawn amount of all outstanding Letters
            of Credit shall not at any time exceed the difference between (a)
            the Line, minus (b) the aggregate unpaid principal amount of all
            Loans, minus (c) the amount of all drawings under any Letter of
            Credit for which Bank has not been reimbursed. No Letter of Credit
            issued or renewed after January 31, 2001, shall have an expiry 365
            or more days after August 31, 2001 (any Letter of Credit with an
            expiry beyond August 31, 2001, an `Extended Expiry LC'). Each draft
            paid by Bank under a Letter of Credit shall be deemed an advance
            under the Line and shall be repaid in accordance with the terms of
            the Line; provided, however, that if the Line is not available for
            any reason whatsoever, at the time any draft is paid by Bank, or if
            advances are not available under the Line in such amount due to any
            limitation of borrowing set forth herein, then the full amount of
            such drafts shall be immediately due and payable, together with
            interest thereon, from the date such amount is paid by Bank to the
            date such amount is fully repaid by Borrower, at that rate of
            interest applicable to advances under the Line. In such event,
            Borrower agrees that Bank, at Bank's sole discretion, may debit any

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<PAGE>   3

            Collateral Account or Borrower's deposit accounts with Bank for the
            amount of such draft. If at any time prior to August 31, 2001, the
            sum of (a) the aggregate unpaid principal of the Loans, plus (b) the
            aggregate undrawn amount of all outstanding Letters of Credit
            exceeds the Line, Borrower shall immediately pay to Bank the amount
            of such excess, together with accrued, unpaid interest on the amount
            of such excess. If at any time after August 31, 2001, the aggregate
            undrawn amount of all Extended Expiry LCs exceeds the aggregate
            amount on deposit in each Collateral Account, Borrower shall
            immediately deliver to Bank, for deposit into a Collateral Account,
            an amount in cash equal to such excess. Letters of Credit shall be
            priced at a rate of 1.50% per annum of the face amount of the Letter
            of Credit, which fee is due and payable on issuance of the Letters
            of Credit."

5.          Amendment of Section 4.A.ii.  Section 4.A.ii. shall be amended to
read in its entirety as follows:

                  "ii. Furnish to Bank within forty-five (45) days after the end
            of each month (a) consolidated and consolidating financial
            statements (including a balance sheet and a profit and loss
            statement) of Borrower for each month of each fiscal year of
            Borrower, (b) a listing of accounts receivable aged from date of
            invoice, and (c) a list of inventory of Borrower."

6.          Amendment to Section 5.A.ii.  Section 5.A.ii. shall be amended to
read in its entirety as follows:

                  "ii. Borrower shall not permit (a) Net Income to be less than
            or equal to $96,000 for the quarter ending December 31, 2000; (b)
            Net Income to be less than or equal to $309,000 for the quarter
            ending March 31, 2001; or Net Income to be less than or equal to
            $540,000 for the quarter ending June 30, 2001."

 7.         Amendment to Section 5.I.  Section 5.I. shall be amended to read in
its entirety as follows:

                  "I. DIVIDENDS AND OTHER DISTRIBUTIONS. Pay any dividends or
            make any other payment or distribution (whether in cash, other
            property, or obligations) on account of its capital stock, or
            redeem, purchase, retire, or otherwise acquire any capital stock, or
            permit any of the subsidiaries to purchase or otherwise acquire any
            capital stock of Borrower or another subsidiary, or set apart any
            money for a sinking or other analogous fund for any dividend or
            other distribution on its capital stock or for any redemption,
            purchase, retirement, or other acquisition of any of its capital
            stock; except that (i) subsidiaries may declare and pay dividends to
            Borrower, and (ii) Borrower may pay dividends if (a) no event of
            default exists or would result therefrom and (b) Borrower's Net
            Income calculated for the four quarter period then most recently
            ended as of the date of payment equals or exceeds $1,100,000."

8.          Amendment to Section 5.G.  Section 5.G. shall be amended to read in
its entirety as follows:

                  "G. CHASE LOAN DOCUMENTS. Amend, modify or restate the Chase
            Loan Documents."

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<PAGE>   4

9.          CONDITIONS PRECEDENT.  The transactions contemplated by this
Amendment shall be deemed effective on the Effective Date when the following
conditions have been complied with to the satisfaction of the Bank, unless
waived by the Bank in writing:

            a.   Renewal Fee. The Borrower shall have paid the Bank a renewal
                 fee of $25,000.

            b.   Amendment. The Borrower shall have executed and delivered to
                 the Bank this Amendment.

            c.   Renewal Line of Credit Note. The Borrower shall have executed
            a new promissory note (as modified and amended from time to time,
            the "Renewal Line of Credit Note") which shall be given in renewal,
            replacement, amendment and substitution of that certain Line of
            Credit Note made by the Borrower payable to the order of the Bank
            dated as of February 25, 2000, as modified by a Note Modification
            Agreement between the parties dated as of May 30, 2000, and as
            modified by a Second Note Modification Agreement between the parties
            dated as of December 12, 2000. The Renewal Line of Credit Note
            shall, among other things (a) be payable on or before August 31,
            2001 for the amount of $5,500,000, or the principal indebtedness
            then outstanding, whichever is less, (b) bear interest from the date
            thereof until paid in the manner therein provided (the interest rate
            prior to default being the Bank's prime rate plus 2.5% per annum),
            and (c) be entitled to the benefits of the Loan Documents, including
            without limitation the Security Agreement and all of the collateral
            described or referred to in the Intercreditor Agreement.

            d.   Officer's Certificate. The Bank shall have received and
            approved an officer's certificate (the "Officer's Certificate") of
            the Borrower which shall, among other things, have attached thereto
            a copy of resolutions of its directors approving the Modification
            Papers and authorizing its officers to execute, deliver and perform
            the Modification Papers.

            e.   Chase Consent. Chase shall have executed and delivered a
            written agreement (the "Chase Consent") consenting to the terms and
            provision of the transactions described in the Modification Papers.

            f.   Consent to Modification of Chase Loan Documents. The Bank shall
            have reviewed, approved and consented to modifications to the Chase
            Loan Documents which parallel those contained in the Modification
            Papers.

            g.   Notice of Final Agreement. The Borrower and the Bank shall have
            executed a notice in compliance with the provisions of Section 26.02
            of the Texas Business and Commerce Code (the "Notice of Final
            Agreement").

            h.   Representations and Warranties. All representations and
                 warranties contained in the Loan Documents and the Modification
                 Papers shall be true and correct in all material respects as
                 though the same have been made on and as of the Effective Date.

            i.   Expenses. The Borrower shall have paid all reasonable expenses
            of the Bank in connection with the preparation of the Modification
            Papers including, but not limited to, the expenses and reasonable
            fees of counsel for the Bank.

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<PAGE>   5

10.          WAIVER OF CERTAIN EVENTS OF DEFAULT. The Borrower is in default
under certain terms and provisions of the Existing Loan Agreement and the Loan
Documents. The parties desire that the Bank waive these defaults as of the
Effective Date and subject to the terms and provisions of this Amendment.

            a.   Waiver of Event of Default Arising out of Failure to Comply
            with Sections 4.12 and 4.17 of Security Agreement. The Bank hereby
            waives the event of default resulting from the Borrower's failure to
            furnish to the Bank (a) a security agreement describing the
            Borrower's trademarks which are registered with the United States of
            America Patent and Trademark Office (the "U.S. Trademarks") and (b)
            a valid perfected first priority security interest in the Borrower's
            trademarks which are registered with governmental authorities other
            than the United States of America, which were to be furnished to the
            Bank in connection with the execution of the Security Agreement. To
            induce the Bank to agree to this waiver of the event of default, the
            Borrower agrees that it will (a) execute and deliver a trademark
            security agreement granting the Bank a perfected first priority
            security interest in the Borrower's U.S. Trademarks required to be
            delivered pursuant to Sections 4.12 and 4.17 of the Security
            Agreement on or before February 28, 2001 and its failure to deliver
            such trademark security agreement on or before February 28, 2001
            shall constitute and event of default under the Agreement, and (b)
            at any time in the future upon the Bank's request execute and
            deliver a trademark security agreement granting the Bank a perfected
            first priority security interest in the Borrower's trademarks which
            are registered with governmental authorities other than the United
            States of America.

            b.   Waiver of Event of Default Arising out of Failure to Comply
            with Section 4.18 of Security Agreement. The Bank hereby waives the
            event of default resulting from the Borrower's failure to have
            taken, on or before January 15, 2001, all action required by the
            Collateral Agent to give the Collateral Agent control over the
            accounts described in Exhibit 3.7 to the Security Agreement,
            including without limitation, the execution and delivery among the
            Borrower, the Collateral Agent and the institutions identified on
            such Exhibit 3.7 of control agreements in form and substance
            satisfactory to the Collateral Agent.

            c.   Waiver of Event of Default Arising out of Failure to Comply
            with Section 4.22 of Security Agreement. The Bank hereby waives the
            event of default resulting from the Borrower's failure to have
            delivered on or before January 15, 2001 (a) the share certificates
            for each of the entities listed on Exhibit 1.2 of the Security
            Agreement, (b) the certificates of existence and good standing for
            Peerless (Barbados) Ltd., (c) resolutions from the board of
            directors of Peerless (Barbados) Ltd. authorizing the transfer of
            the Peerless (Barbados) Ltd. shares to the Collateral Agent, and (d)
            the documentation necessary to perfect the Collateral Agent's
            interest in the Peerless Europe Ltd. share certificates pursuant to
            the laws of the United Kingdom. To induce the Bank to agree to the
            waiver of the event of default, the Borrower agrees that it will
            deliver, on or before February 28, 2001, (a) the certificates of
            existence and good standing for Peerless (Barbados) Ltd. and (b)
            resolutions from the board of directors of Peerless (Barbados) Ltd.
            authorizing the transfer of the Peerless (Barbados) Ltd. shares to
            the Collateral Agent, and its failure to deliver such certificates
            and resolutions on or before February 28, 2001 shall constitute an
            event of default under the Agreement. As a further inducement to the
            Bank to agree to the waiver of the event of default, (a) the
            Borrower represents and warrants to the Bank that the net income of
            Peerless Europe Ltd. for the twelve (12) months most recently ended
            is $____________, and the net worth of Peerless Europe Ltd. for the
            most recent month ended is $____________, and (b) the Borrower
            agrees it will at any time in the future upon the Bank's request
            execute and deliver the documentation necessary to perfect the
            Collateral Agent's interest in the Peerless Europe Ltd. share
            certificates pursuant to the laws of the United Kingdom.

                                       5
<PAGE>   6

            d.   Waiver of Event of Default Arising Out of Failure to Company
            with Section 5.A.ii. The Bank hereby waives the event of default
            which existed prior to the Effective Date with respect to the
            Borrower's compliance with Section 5.A.ii. of the Existing Loan
            Agreement. This default has ceased to exist as of the Effective Date
            by virtue of the amendment set forth in Section 2.__ above.

            e.   Limitation of Waivers. The waivers contained in Section 4.1,
            Section 4.2, Section 4.3, and Section 4.4 of this Amendment shall
            not constitute a waiver of any future Event of default that may
            occur under the Security Agreement, including, without limitation,
            the Borrower's failure to keep, perform, or observe the covenants
            set forth in Sections 4.12, 4.17, 4.18, and 4.22 of the Security
            Agreement.

11.         CERTAIN REPRESENTATIONS AND WARRANTIES.  To induce the Bank to
            enter into this Amendment, the Borrower represents and warrants as
            follows (which representations and warranties shall survive the
            execution and delivery hereof):

            a.   Authority and Compliance. The Borrower has full power and
            authority to execute, deliver, and perform all of the Modification
            Papers to which it is a party and to incur and perform the
            obligations provided for therein. No consent or approval of any
            public authority or third party is required as a condition to the
            validity or performance of any of the Modification Papers.

            b.   Binding Agreements. The Modification Papers executed by the
            Borrower constitute valid and legally binding obligations of the
            Borrower, enforceable in accordance with their terms.

            c.   No Conflicting Agreements. There is no charter, bylaw, stock
            provision, partnership agreement, or other document pertaining to
            the power or authority of the Borrower and no provision of any
            existing agreement, mortgage, indenture, or contract binding upon
            the Borrower or affecting any of the property of the Borrower which
            would conflict with or in any way prevent in any material respect
            the execution, delivery, or carrying out of the terms of the
            Modification Papers.

            d.   Previous Representations. All of the representations by the
            Borrower in the Agreement are true and correct as of the date hereof
            as if set forth herein.

            e.   No Claims. To induce the Bank to agree to the terms and
            provisions of the Modification Papers, the Borrower represents and
            warrants that as of the Effective Date of the Borrower's execution
            of this Amendment there are no claims or offsets against or defenses
            or counterclaims to the Borrower's obligations under the Loan
            Documents.

12.         LIMITATION ON AGREEMENTS. The modifications set forth herein are
limited precisely as written and shall not be deemed (a) to be a consent under
or a waiver of or an amendment to any other term or condition of the Agreement
or any of the Loan Documents, or (b) to prejudice any right or rights which the
Bank now has or may in the future have under or in connection with the Agreement
and the Loan Documents, each as amended hereby. The Modification Papers
constitute Loan Documents for all purposes.

13.        WAIVER AND RELEASE.  To induce the Bank to agree to the terms and
provisions of the Modification Papers, the Borrower:

            a.   Waives all claims, offsets, defenses or counterclaims to its
            obligations under the Loan Documents, whether known or unknown,
            arising prior to the Effective Date, and

                                       6
<PAGE>   7

            b.   Releases and discharges the Bank and its officers, directors,
            employees, agents, shareholders, affiliates and attorneys
            (collectively, the "Released Parties") from any and all obligations,
            indebtedness, liabilities, claims, rights, causes of action or
            demands whatsoever, whether known or unknown, suspected or
            unsuspected, in law or equity, which the Borrower ever had, now has,
            claim to have or may have against any Released Party arising prior
            to the Effective Date and from or in connection with the Loan
            Documents or the transactions contemplated thereby.

14.         INCORPORATION OF CERTAIN PROVISIONS BY REFERENCE.  The provisions
of Section 10.B and Section 11 of the Agreement are incorporated herein by
reference for all purposes.

15.         ENTIRETY, ETC.  This instrument and all of the other Loan Documents
embody the entire agreement between the parties. THIS AGREEMENT AND ALL OF THE
OTHER LOAN DOCUMENTS REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY
NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE
PARTIES.

            IN WITNESS WHEREOF, the parties have executed this Amendment D to
Eighth Amended and Restated Loan Agreement to be effective as of the Effective
Date.

                                   BANK OF AMERICA, N.A.

                                   By: /s/
                                      -----------------------------------
                                       Mark L. Henze, Senior Vice President

                                   PEERLESS MFG. CO.

                                   By: /s/
                                      ---------------------------------------
                                       Sherrill Stone, Chairman and Chief
                                       Executive Officer

                                       7

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