FIRST AMENDMENT TO STOCK PURCHASE
                AGREEMENT By and Among PIERCE MANUFACTURING INC.,
                 THE SHAREHOLDERS OF PIERCE MANUFACTURING INC.,
                          and OSHKOSH TRUCK CORPORATION



        THIS FIRST AMENDMENT TO STOCK PURCHASE AGREEMENT (the "First
   Amendment") is made and entered into as of this ___ day of September,
   1996, by and between Pierce Manufacturing Inc., a Wisconsin corporation
   (the "Company"), Oshkosh Truck Corporation, a Wisconsin corporation
   ("Buyer") and the individuals, entities and trusts listed on the signature
   page hereof (the "Sellers").

        WHEREAS, the parties entered into the Stock Purchase Agreement by and
   among Buyer, the Company and Sellers dated August 7, 1996 (the
   "Agreement");

        WHEREAS, the Company has disclosed certain environmental matters
   described herein to Buyers subsequent to the signing of the Agreement; and

        WHEREAS, as a condition to Closing, Buyer requires the escrow of a
   portion of the Purchase Price under the Agreement relating to these
   recently disclosed environmental matters and an increase in the
   environmental cap as provided by the modifications contained in this First
   Amendment. 

        NOW, THEREFORE, in consideration of the foregoing premises and of the
   mutual covenants and conditions herein contained, the parties agree as
   follows:

        1.   The last sentence of Paragraph 1.2 shall be deleted, and be
   replaced as follows:

                  At the Closing, the Buyer shall pay the Purchase Price
             by wire transfer of immediately available funds as follows: 
             (a) One Million Dollars ($1,000,000) to the Escrow Agent as
             defined in and established pursuant to that certain
             Investigation, Remediation and Escrow Agreement by and
             among the Company, Buyer, the Sellers and Firstar Trust
             Company (the "Escrow Agreement") in the form of Exhibit 9.8
             (attached to this First Amendment); and (b) the remainder
             of the Purchase Price to the Sellers in the amounts and per
             the wire transfer instructions set forth on Schedule 1
             attached hereto.

        2.   Paragraph 3.2(d) shall be added to the Agreement to read in its
   entirety as follows:

                  (d)  The Escrow Agreement dated the Closing Date duly
             executed by Buyer and Escrow Agent.

        3.   Paragraph 3.3(h) shall be added to the Agreement to read in its
   entirety as follows:

                  (h)  The Escrow Agreement dated the Closing Date duly
             executed by the Sellers, Company and Escrow Agent.

        4.   Paragraph 9.5.2(b) shall be deleted from the Agreement and
   replaced to read in its entirety as follows:

                  (b)  With respect to any Claim based upon breaches of the
             warranties or representations contained in Paragraph 4.2.21 or a
             Deemed Environmental Breach, the following shall apply:  (i) the
             Sellers shall be responsible for providing indemnification to
             the Buyer under this Article IX, subject to the Environmental
             Basket Amount, in an amount equal to fifty percent (50%) of the
             amount of the Buyer's Claims for breach of such warranty or
             representation or Deemed Environmental Breach until the
             aggregate liability of the Sellers for breach of such warranty
             or representation or Deemed Environmental Breach equals Four
             Million Two Hundred Fifty Thousand Dollars ($4,250,000.00), at
             which time the Sellers shall have no further liability for
             breach of such warranty or representation or Deemed
             Environmental Breach; and (ii) each Seller shall be responsible
             for an amount equal to the product of the liability of all
             Sellers under clause (i), above, and the percentage set forth
             opposite such Seller's name on Schedule 1 attached hereto.

        5.   Paragraph 9.8 shall be added to the Agreement to read in its
   entirety as follows:

                  9.8  Limitations/Relation to Escrow Agreement.  The
             limitations and procedures of this Article IX shall not apply
             to, nor in any way limit the rights of Buyer and Company to be
             reimbursed for Specific Environmental Claims (as defined in the
             Escrow Agreement).  To the extent that the Buyer shall receive
             any disbursement of Escrow Funds under the Escrow Agreement, the
             amount of any such disbursement shall not be included in
             calculating the amount of any Buyer's Claim under Article IX of
             the Agreement.  In addition, the Buyer shall have no right to
             receive any indemnification under Article IX of the Agreement,
             for any Special Environmental Claim (as defined in the Escrow
             Agreement) until such time as there are no remaining Escrow
             Funds thereunder.

        6.   Except as modified by this First Amendment, the Agreement shall
   remain in full force and effect.

             IN WITNESS WHEREOF,  each party has caused this First Amendment
   to Stock Purchase Agreement to be executed as of the date first written
   above.

                                 THE COMPANY:


                                 PIERCE MANUFACTURING INC.



                                 By:                                         
                                      William H. Peters, Vice President
                                      and Treasurer

                                 SELLERS:


                                 THE NORTHWESTERN MUTUAL LIFE
                                 INSURANCE COMPANY


                                                                             
                                 By:  _______________, Its_________________



                                 ROBERT W. BAIRD & CO. INCORPORATED


                                                                             
                                 By:  _______________, Its_________________



                                 THE MICHAEL R. REESE AND KATHLEEN A. REESE
                                 JOINT REVOCABLE TRUST DATED SEPTEMBER 23,
                                 1993


                                 By:                                         
                                      Michael R. Reese, Trustee

                                 THE MICHAEL R. REESE IRREVOCABLE TRUST,
                                 DATED SEPTEMBER 23, 1993, f/b/o JULIE S.
                                 REESE, Marshall & Ilsley Trust Company,
                                 Successor Trustee


                                 By:                                         
                                 Name:                                       
                                 Title:                                      


                                 THE MICHAEL R. REESE IRREVOCABLE TRUST,
                                 DATED SEPTEMBER 23, 1993, f/b/o BRET T.
                                 REESE, Marshall & Ilsley Trust Company,
                                 Successor Trustee



                                 By:                                         
                                 Name:                                       
                                 Title:                                      



                                                                             
                                 David A. Ogilvie


                                 BETH ALEXANDER LIMITED PARTNERSHIP DATED MAY
                                 31, 1996



                                                                             
                                 David A. Ogilvie, General Partner


                                                                             
                                 Andrew D. Oglivie

                                 FAITH LIMITED PARTNERSHIP DATED MAY 31, 1996



                                 By:                                         
                                      Andrew D. Ogilvie, General Partner

                                 DAVID A. OGLIVIE CHARITABLE REMAINDER
                                 UNITRUST, F&M Bank of Kaukauna, Trustee



                                 By:                                         
                                 Name:                                       
                                 Title:                                      


                                 ANDREW D. OGLIVIE IRREVOCABLE CHARITABLE
                                 REMAINDER UNITRUST, F&M Bank of Kaukauna,
                                 Trustee 


                                                                             
                                 By:                                         
                                 Name:                                       
                                 Title:                                      



                                                                             
                                 Peter M. Jansen


                                                                             
                                 William H. Peters


                                                                             
                                 Lloyd A. DeWald


                                                                             
                                 James W. Staats


                                                                             
                                 Gregory E. Potts


                                                                             
                                 Jeffrey W. Strenger


                                                                             
                                 Thomas R. Olson


                                                                             
                                 Neil L. Ort


                                 MARGARET BOLDT ANDERSON TRUST DATED OCTOBER
                                 13, 1987


                                                                             
                                 By:  Margaret Boldt Anderson, Trustee


                                                                             
                                 John W. Puth


                                                                             
                                 Alison L. Puth


                                                                             
                                 David W. Puth


                                                                             
                                 Jonathan C. Puth


                                 WINDFALLS UNLIMITED, LLC


                                                                             
                                 By:  Jeffrey D. Riester, Manager


                                 THE BUYER:


                                 OSHKOSH TRUCK CORPORATION 


                                                                             
                                 By:  __________________, Its_______________