Document:

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                                                               Exhibit 4.2.1

                 SECOND AMENDMENT TO NOTE PURCHASE AGREEMENT

         This Second Amendment to Note Purchase Agreement ("Amendment"),
dated as of August 31, 2001, by and between Gardner Denver Inc., a Delaware
corporation (the "Company") and Metropolitan Life Insurance Company
("Metropolitan Life").

         WITNESSETH:

         WHEREAS, the Company and Metropolitan Life are parties to that
certain Note Purchase Agreement dated as of September 26, 1996 (together
with all exhibits, schedules, attachments and dependencies thereto, the
"Agreement"); and

         WHEREAS, pursuant to, and under the terms of the Agreement,
Metropolitan Life is the purchaser and the holder of all of the Notes (as
defined in the Agreement) issued by the Company; and

         WHEREAS, the Company has requested that the Agreement be amended to
permit certain Subsidiaries to execute and deliver the guaranties required
by the Credit Agreement (as defined in the Agreement) (the "Subsidiary
Guaranties"), provided that Metropolitan Life receives like guaranties from
those Subsidiaries on terms no less favorable to Metropolitan Life than
those contained in the Subsidiary Guaranties given to the Lenders as
required by the Note Purchase Agreement; and

         WHEREAS, Metropolitan Life is willing to so amend the Agreement as
requested by the Company pursuant to and upon the terms and conditions of
this Amendment.

         NOW, THEREFORE, for good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, the Company and
Metropolitan Life hereby agrees as follows:

         1. The definition of "Credit Agreement" set forth in Schedule B of
the Note Purchase Agreement being "Defined Terms" is hereby amended as
follows:

         "Credit Agreement" means (a) that certain Credit Agreement dated as
of January __, 1998, among the Company, the Lenders named therein, First
National Bank of Chicago, as Agent for said Lender and as LC Issuer as may
be amended, supplemented, restated or otherwise modified from time to time,
(b) that certain Credit Agreement dated as of August 31, 2001, among the
Company, the Lenders named therein, Bank One, N.A., as Agent for the Lenders
as the same may be amended, supplemented, restated or otherwise modified
from time to time, or (c) any other credit agreement (i) issued, entered
into or otherwise given in exchange for, or the proceeds of which are used
to extend, refinance, renew, replace, substitute, supplement or refund all
or any portion of the Company's indebtedness evidenced by the Credit
Agreement referred to in clause (a) and (b) above, or (ii) issued in
connection with the acquisition of any new subsidiary, as otherwise
permitted under the terms of this Agreement.

         2. Except as expressly amended hereby, the Agreement and all other
documents executed in connection therewith shall remain unaltered and in
full force and effect. The Agreement, as amended hereby, and all rights and
powers created thereby or thereunder or under such other documents are in
all respects ratified and confirmed. From and after the date hereof, the
Agreement shall be deemed to be amended and modified as herein provided, but
except as so amended and modified, the Agreement shall continue in full
force and effect. The Agreement and this Amendment shall be read, taken and
construed as one and the same instrument. On and after the date hereof the
terms "Agreement" as used in the Agreement and all other references to the
Note Purchase Agreement in the Agreement and the documents executed in
connection therewith and/or herewith or any other instrument, document or
writing executed by the Company or any other person or furnished to
Metropolitan Life by

                                   - 1 -

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the Company or any other person in connection herewith or therewith shall
mean the Note Purchase Agreement as amended hereby.

         3. The Company represents and warrants to Metropolitan Life that
(i) this Amendment has been duly authorized, executed and delivered on its
behalf, and the Agreement, as amended and supplemented hereby constitute its
legal, valid and binding obligation enforceable against it in accordance
with its terms, except to the extent that a remedy or default may be
determined by a court of competent jurisdiction to constitute a penalty and
except to the extent that enforceability may be limited by bankruptcy,
insolvency, reorganization, moratorium, or other similar laws pertaining to
creditors rights or the general principles of equity, (ii) no default or
event of default has occurred and is continuing under the Agreement and
(iii) the representations and warranties set forth in Section 5 of the
Agreement are true and correct as of the date hereof.

         4. This Amendment shall not be effective until Metropolitan Life
shall have received (a) duly executed and delivered Guaranties from the
Subsidiaries and (b) a copy of the executed Credit Agreement (being the
Credit Agreement dated as of August 31, 2001), including the Subsidiary
Guaranties, to the extent not already in the possession of Metropolitan
Life.

         5. This Amendment may be signed in any number of counterparts, each
of which shall be deemed an original, including the signatures thereon, but
all of which together shall constitute one and the same instrument.

         6. Except as otherwise specified herein, this Amendment embodies
the entire agreement and the understanding between the Company and
Metropolitan Life with respect to the subject matter hereof and supersedes
all prior Agreements, consents and understandings relating to any amendment
of the Agreement.

                                   - 2 -

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         IN WITNESS WHEREOF, the Company and Metropolitan Life have caused
this Amendment to be duly executed as of the date first herein above
written.

                                     GARDNER DENVER INC.

                                     By:
                                        ---------------------------------------

                                     METROPOLITAN LIFE INSURANCE COMPANY

                                     By:
                                        ---------------------------------------

                                   - 3 -<PAGE>

                                                              Exhibit 10.0.2

                         AMENDMENT AND WAIVER NO. 3

                                     TO

                              CREDIT AGREEMENT

                        DATED AS OF JANUARY 20, 1998

                  THIS AMENDMENT AND WAIVER NO. 3 TO CREDIT AGREEMENT
("Amendment") is made as of the "Amendment Effective Date" (as defined
below) by and among GARDNER DENVER, INC. (f/k/a Gardner Denver Machinery
Inc., the "Borrower"), the financial institutions listed on the signature
pages hereof as lenders (the "Lenders"), BANK ONE, NA (f/k/a The First
National Bank of Chicago), individually as a Lender, as LC Issuer and as
agent (the "Agent") for the Lenders under that certain Credit Agreement
dated as of January 20, 1998 by and among the Borrower, the Lenders and the
Agent, as amended by that certain Amendment and Waiver No. 1 thereto dated
as of August 12, 1999 and that certain Amendment No. 2 thereto dated as of
July 28, 2000 (as so amended, the "Credit Agreement"). Defined terms used
herein and not otherwise defined herein shall have the meaning given to them
in the Credit Agreement.

                                 WITNESSETH

                  WHEREAS, the Borrower, the Lenders and the Agent are
parties to the Credit Agreement;

                  WHEREAS, the Borrower intends to acquire (the
"Acquisition") certain agreed upon assets and liabilities of the Hoffman Air
and Filtration Systems business (the "Target"), including the stock of
certain related entities and has provided the Agent and the Lenders with
historical financial statements for the Target and pro forma financial
statements for the Borrower after giving effect to the Acquisition on a
combined and consolidated basis and the acquisition described in the Notice
of Acquisition dated as of August 2, 2001 previously provided to the Agent
and Lenders;

                  WHEREAS, the Borrower has requested that the Lenders amend
the Credit Agreement in certain respects; and

                  WHEREAS, the Lenders and the Agent are willing to amend
the Credit Agreement on the terms and conditions set forth herein;

                  WHEREAS, the Borrower, the Lenders and the Agent desire to
waive certain requirements pertaining to the Acquisition;

                  NOW, THEREFORE, in consideration of the premises set forth
above, the terms and conditions contained herein, and other good and
valuable consideration, the receipt and

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sufficiency of which are hereby acknowledged, the Borrower, the Lenders and
the Agent have agreed to the following waivers of and amendments to the
Credit Agreement.

         1.       AMENDMENTS TO CREDIT AGREEMENT. Effective as of the Amendment
                  ------------------------------
Effective Date and subject to the satisfaction of the conditions precedent
set forth in Section 2 below, the Credit Agreement is hereby amended as
             ---------
follows:

                  1.1.     ARTICLE I OF THE CREDIT AGREEMENT IS HEREBY AMENDED
                           ---------
BY DELETING THE DEFINITIONS OF "APPLICABLE FACILITY FEE" AND "APPLICABLE
MARGIN" IN THEIR ENTIRETY AND SUBSTITUTING THE FOLLOWING THEREFOR:

                  "APPLICABLE FACILITY FEE" means for any day, the
                  percentage rate per annum set forth below opposite the
                  Consolidated Debt to Cash Flow Ratio in effect on such
                  day:

<TABLE>
<CAPTION>
                                         CONSOLIDATED DEBT TO                        APPLICABLE
                                           CASH FLOW RATIO:                        FACILITY FEE:

                                   LESS THAN               BUT GREATER
                                  OR EQUAL TO                  THAN
                                  <S>                      <C>                     <C>
                                      1.5                      --                      .175%
                                      2.0                      1.5                      .20%
                                      2.5                      2.0                     .225%
                                      3.0                      2.5                      .25%
                                      3.5                      3.0                      .30%
</TABLE>

                  The Applicable Facility Fee shall be adjusted (upward or
                  downward) effective three Business Days after the Agent
                  has received (and such adjustment, if any, shall be based
                  upon) the Borrower's compliance certificate delivered with
                  the Borrower's financial statements pursuant to clauses
                                                                  -------
                  (i) and (ii) of Section 6.1.
                  ---     ----    -----------

                  "APPLICABLE MARGIN" means, with respect to a Eurocurrency
                  Advance for any day, the percentage rate per annum set
                  forth below opposite the Consolidated Debt to Cash Flow
                  Ratio in effect on such day:

<TABLE>
<CAPTION>
                                     CONSOLIDATED DEBT TO                     APPLICABLE MARGIN:
                                       CASH FLOW RATIO:

                                LESS THAN              BUT GREATER
                               OR EQUAL TO                THAN                EUROCURRENCY LOANS
                               <S>                     <C>                    <C>
                                   1.5                    --                        .575%
                                   2.0                    1.5                        .80%
                                   2.5                    2.0                       1.025%
                                   3.0                    2.5                       1.25%
                                   3.5                    3.0                       1.45%
</TABLE>

                                     2

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                  The Applicable Margin shall be adjusted (upward or
                  downward) effective three Business Days after the Agent
                  has received (and such adjustment, if any, shall be based
                  upon) the Borrower's compliance certificate delivered with
                  the Borrower's financial statements pursuant to clauses
                                                                  -------
                  (i) and (ii) of Section 6.1.
                  ---     ----    -----------

                  1.2.      SECTION 6.12 IS DELETED IN ITS ENTIRETY AND THE
                            ------------
FOLLOWING IS SUBSTITUTED THEREFOR:

                  6.12. Indebtedness. The Borrower will not, nor will it
                        ------------
                  permit any Subsidiary to, create, incur or suffer to exist
                  any Indebtedness, except:

                  (i)      The Loans.

                  (ii)     Indebtedness existing on the date hereof and
                  described in Schedule "2" hereto.

                  (iii)    Contingent Obligations permitted by Section 6.16.

                  (iv)     Hedging Obligations entered into in the ordinary
                  course of business as bona fide hedges against interest
                  rate or commodity price fluctuations and not for
                  speculative purposes.

                  (v)      Indebtedness of one or more Subsidiaries to the
                  Borrower, but only to the extent permitted by clauses (vi)
                  and (ix) of Section 6.15.

                  (vi)     Additional Indebtedness of the Borrower and its
                  Subsidiaries in an aggregate principal amount at any one
                  time outstanding not to exceed the greater of (a)
                  $65,000,000 or (b) ten percent (10%) of Consolidated Net
                  Worth.

         2.       WAIVER. Effective as of the date hereof and subject to the
                  ------
satisfaction of the conditions precedent set forth in Section 3 below, the
                                                      ---------
Lenders hereby waive the Borrower's non-compliance with the provisions of
Section 6.15(x) of the Credit Agreement requiring that the Lenders be
---------------
provided with the Acquisition Financials at least 30 days prior to the
proposed acquisition. The undersigned Lenders agree that the Acquisition
Financials demonstrate to their reasonable satisfaction that, if the
Acquisition were consummated, the Borrower would be able to maintain
compliance with Sections 6.20, 6.21 and 6.22 through the Facility
                -------------  ----     ----
Termination Date. This specific waiver is limited to the express
circumstances described herein and shall not be construed to constitute (i)
a waiver of any other event, circumstance or condition or of any other right
or remedy available to the Agent or any Lender pursuant to the Agreement or
(ii) a consent

                                     3

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to any departure by the Borrower or any Subsidiary from any other term or
requirement under the Agreement.

         3.       CONDITIONS OF EFFECTIVENESS. This Amendment shall become
                  ---------------------------
effective and be deemed effective as of the Amendment Effective Date, if,
and only if, the Agent shall have received each of the following:

                  (a)      duly executed originals of this Amendment from the
         Borrower and the Required Lenders;

                  (b)      a certification on or before September 30, 2001 that
         the Acquisition has closed (the date of such closing being the
         "Amendment Effective Date");

                  (c)      a reaffirmation from each of the Borrower's other
         Subsidiaries which are parties to a Subsidiary Guaranty in the form
         of Exhibit A attached hereto and made a part hereof; and
            ---------

                  (d)      such other documents, instruments and agreements as
         the Agent may reasonably request.

         4.       REPRESENTATIONS AND WARRANTIES OF THE BORROWERS. The Borrower
                  -----------------------------------------------
hereby represents and warrant as follows:

                  (a)      This Amendment and the Credit Agreement as
         previously executed and as amended hereby, constitute legal, valid
         and binding obligations of the Borrower and are enforceable against
         the Borrower in accordance with their terms.

                  (b)      Upon the effectiveness of this Amendment, the
         Borrower hereby reaffirms all covenants, representations and
         warranties made in the Credit Agreement and other loan documents,
         to the extent the same are not amended hereby, and agrees that all
         such covenants, representations and warranties shall be deemed to
         have been remade as of the effective date of this Amendment.

                  (c)      Other than the Defaults waived pursuant to Section 2
                                                                      ---------
         above, no Default or Unmatured Default has occurred and is
         continuing under the Credit Agreement.

         5.       REFERENCE TO THE EFFECT ON THE CREDIT AGREEMENT.
                  -----------------------------------------------

                  (a)      Upon the effectiveness of Section 1 hereof, on and
                                                     ---------
         after the date hereof, each reference in the Credit Agreement to
         "this Agreement," "hereunder," "hereof," "herein" or words of like
         import shall mean and be a reference to the Credit Agreement, as
         amended previously and as amended hereby.

                  (b)      Except as previously amended and as specifically
         amended and waived above, the Credit Agreement, as supplemented by
         revised Schedule 1 (a copy of which is attached hereto) and all
         other documents, instruments and agreements executed and/or
         delivered in connection therewith shall remain in full force and
         effect, and are hereby ratified and confirmed.

                                     4

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                  (c)      Except to the limited extent set forth in Section 2
                                                                     ---------
         above, the execution, delivery and effectiveness of this Amendment
         shall not operate as a waiver of any right, power or remedy of the
         Agent or any of the Lenders, nor constitute a waiver of any
         provision of the Credit Agreement or any other documents,
         instruments and agreements executed and/or delivered in connection
         therewith.

         6.       COSTS AND EXPENSES. The Borrower agrees to pay all reasonable
                  ------------------
costs, fees and out-of-pocket expenses (including attorneys' fees and
expenses charged to the Agent) incurred by the Agent in connection with the
preparation, arrangement, execution and enforcement of this Amendment.

         7.       GOVERNING LAW. This Amendment shall be governed by and
                  -------------
construed in accordance with the internal laws (as opposed to the conflict
of law provisions) of the State of Illinois.

         8.       HEADINGS. Section headings in this Amendment are included
                  --------
herein for convenience of reference only and shall not constitute a part of
this Amendment for any other purpose.

         9.       COUNTERPARTS. This Amendment may be executed by one or more
                  ------------
of the parties to the Amendment on any number of separate counterparts and all
of said counterparts taken together shall be deemed to constitute one and
the same instrument. A facsimile signature page hereto sent to the Agent or
the Agent's counsel shall be effective as a counterpart signature provided
each party executing such a facsimile counterpart agrees to deliver
originals to the Agent thereof.

                                     5

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                  IN WITNESS WHEREOF, this Amendment and Waiver No. 3 has
been duly executed as of the day and year first above written.

                                   GARDNER DENVER, INC. (formerly known as
                                   GARDNER DENVER MACHINERY INC.),
                                     as Borrower

                                   By:
                                       ----------------------------------------
                                       Name:
                                       Title:

                                   BANK ONE, NA (formerly known as THE FIRST
                                   NATIONAL BANK OF CHICAGO),

                                   Individually as a Lender, as LC Issuer
                                   and as Agent

                                   By:
                                       ----------------------------------------
                                       Name:
                                       Title:

                                   MERITA BANK LTD.,
                                     as a Lender

                                   By:
                                       ----------------------------------------
                                       Name:
                                       Title:

                                   THE BANK OF NEW YORK,
                                     as a Lender

                                   By:
                                       ----------------------------------------
                                       Name:
                                       Title:

                                   CREDIT AGRICOLE INDOSUEZ,
                                     as a Lender

                                   By:
                                       ----------------------------------------
                                       Name:
                                       Title:

                                   By:
                                       ----------------------------------------
                                       Name:
                                       Title:

                                     6

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                                   HARRIS TRUST & SAVINGS BANK,
                                     as a Lender

                                   By:
                                       ----------------------------------------
                                       Name:
                                       Title:

                                   BANK OF AMERICA, NATIONAL
                                   ASSOCIATION (f/k/a NationsBank, N.A.),
                                   as a Lender

                                   By:
                                       ----------------------------------------
                                       Name:
                                       Title:

                                     7

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                                  EXHIBIT A

                                     TO

                         AMENDMENT AND WAIVER NO. 3

                    Reaffirmation of Subsidiary Guaranty

                                  Attached

                                     8

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                                REAFFIRMATION

                  Each of the undersigned hereby acknowledges receipt of a
copy of Amendment and Waiver No. 3 to the Credit Agreement dated as of
January 20, 1998, by and among Gardner Denver, Inc. (f/k/a Gardner Denver
Machinery, Inc.), the Lenders and the Agent, as amended by that certain
Amendment and Waiver No. 1 thereto dated as of August 12, 1999 and that
certain Amendment and Waiver No. 2 thereto dated as of ___________, ____ (as
so amended, the "Credit Agreement"), which Amendment and Waiver No. 3 is
dated as of August 31, 2001 (the "Amendment"). Capitalized terms used in
this Reaffirmation and not defined herein shall have the meanings given to
them in the Credit Agreement. Without in any way establishing a course of
dealing by the Agent or any Lender, the undersigned reaffirms the terms and
conditions of the Subsidiary Guaranty dated as of January 20, 1998 executed
by it and acknowledges and agrees that such Subsidiary Guaranty and each and
every other Loan Document executed by the undersigned in connection with the
Credit Agreement remain in full force and effect and are hereby ratified,
reaffirmed and confirmed. All references to the Credit Agreement contained
in the above-referenced documents shall be a reference to the Credit
Agreement as so amended by the Amendment and as the same may from time to
time hereafter be amended, modified or restated.

                                   GARDNER DENVER INTERNATIONAL, INC.

                                   By:
                                       ----------------------------------------
                                   Its:
                                       ----------------------------------------

                                   GARDNER DENVER HOLDINGS INC.

                                   By:
                                       ----------------------------------------
                                   Its:
                                       ----------------------------------------

                                   LAMSON CORPORATION

                                   By:
                                       ----------------------------------------
                                   Its:
                                       ----------------------------------------

                                   TCM INVESTMENTS, INC. (individually and
                                   as successor to the business previously
                                   conducted by Adex, Inc.)

                                   By:
                                       ----------------------------------------
                                   Its:
                                       ----------------------------------------

                                     9

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                                   CRS POWER FLOW, INC.

                                   By:
                                      -----------------------------------------
                                      Name:
                                      Title:

                                   JETTING SYSTEMS &
                                   ACCESSORIES, INC.

                                   By:
                                      -----------------------------------------
                                      Name:
                                      Title:

                                   ALLEN-STUART EQUIPMENT CO., INC.

                                   By:
                                      -----------------------------------------
                                      Name:
                                      Title:

                                   GARDNER DENVER WATER JETTING SYSTEMS, INC.
                                   (F.K.A. BUTTERWORTH JETTING SYSTEMS, INC.)

                                   By:
                                      -----------------------------------------
                                      Name:
                                      Title:

                                   AIR RELIEF, INC.

                                   By:
                                      -----------------------------------------
                                      Name:
                                      Title:

                                     10

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