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                                    PLEDGE  AGREEMENT dated as of March 6, 1998,
                           among  TEREX  CORPORATION,   a  Delaware  corporation
                           ("Terex"),   each   subsidiary  of  Terex  listed  on
                           Schedule I hereto (each such subsidiary  individually
                           a   "Subsidiary   Pledgor"  and   collectively,   the
                           "Subsidiary  Pledgors";   Terex  and  the  Subsidiary
                           Pledgors are referred to  collectively  herein as the
                           "Pledgors")  and CREDIT SUISSE FIRST  BOSTON,  a bank
                           organized  under  the  laws  of  Switzerland,  acting
                           through its New York branch  ("CSFB"),  as collateral
                           agent (in such capacity,  the "Collateral Agent") for
                           the  Secured   Parties  (as  defined  in  the  Credit
                           Agreement referred to below).

         Reference is made to (a) the Credit Agreement dated as of March 6, 1998
(as amended,  supplemented or otherwise  modified from time to time, the "Credit
Agreement"), among Terex, Terex Equipment Limited, a company organized under the
laws of  Scotland,  P.P.M.  S.A.,  a  company  organized  under  the laws of the
Republic of France,  Unit Rig (Australia)  Pty. Ltd., a company  organized under
the laws of New South Wales,  and P.P.M.  Sp.A., a company  organized  under the
laws of the  Republic  of Italy,  the Lenders (as defined in Article I thereto),
the Issuing Banks (as defined in Article I thereto) and CSFB, as  administrative
agent and as collateral agent for the Lenders, (b) the Guarantee Agreement dated
as of March 6, 1998 (as amended, supplemented or otherwise modified from time to
time, the "Subsidiary  Guarantee  Agreement") among the Subsidiary  Pledgors and
the Collateral  Agent and (c) the Guarantee  Agreement dated as of March 6, 1998
(as amended,  supplemented  or otherwise  modified from time to time, the "Terex
Guarantee Agreement") between Terex and the Collateral Agent.  Capitalized terms
used herein and not defined herein shall have meanings assigned to such terms in
the Credit Agreement.

         The Lenders have agreed to make Loans to the  Borrowers and the Issuing
Banks have agreed to issue  Letters of Credit for the account of the  Borrowers,
pursuant to, and upon the terms and subject to the conditions  specified in, the
Credit Agreement. The Subsidiary Pledgors have agreed to guarantee,  among other
things,  all the obligations of the Borrower under the Credit Agreement pursuant
to the  Subsidiary  Guarantee  Agreement.  Terex has agreed to guarantee,  among
other things,  all the obligations of the Subsidiary  Borrowers under the Credit
Agreement  pursuant to the Terex  Guarantee  Agreement.  The  obligations of the
Lenders to make  Loans and of the  Issuing  Bank to issue  Letters of Credit are
conditioned upon, among other things, the execution and delivery by the Pledgors
of a Pledge  Agreement  in the form  hereof to secure  (a) the due and  punctual
payment by the  Borrowers  of (i) the  principal  of and  premium,  if any,  and
interest  (including  interest  accruing  during the pendency of any bankruptcy,
insolvency,  receivership  or other  similar  proceeding,  regardless of whether
allowed or allowable in such proceeding) on the Loans,  when and as due, whether
at  maturity,  by  acceleration,  upon one or more dates set for  prepayment  or
otherwise,  (ii) each  payment  required  to be made by any  Borrower  under the
Credit Agreement in respect of any Letter of Credit,  when and as due, including
payments in respect of  reimbursement  of  disbursements,  interest  thereon and
obligations to provide cash collateral and (iii) all other monetary obligations,
including fees,  costs,  expenses and indemnities,  whether primary,  secondary,
direct, contingent,  fixed or otherwise (including monetary obligations incurred
during the pendency of any bankruptcy, insolvency, receivership or other similar
proceeding,  regardless of whether allowed or allowable in such proceeding),  of
the Borrowers to the Secured  Parties  under the Credit  Agreement and the other
Loan  Documents,  (b)  the  due  and  punctual  performance  of  all  covenants,
agreements,  obligations  and  liabilities of the Borrowers under or pursuant to
the Credit  Agreement  and the other Loan  Documents,  (c) the due and  punctual
payment  and  performance  of all the  covenants,  agreements,  obligations  and
liabilities  of each  Subsidiary  Pledgor  under or pursuant  to the  Subsidiary
Guarantee  Agreement  or the other Loan  Documents  and (d) the due and punctual
payment and  performance of all  obligations of the Borrowers under each Hedging
Agreement  entered into with any counterparty that was a Lender (or an Affiliate
thereof) at the time such Hedging  Agreement  was entered into (all the monetary
and other obligations referred to in the preceding clauses (a) through (d) being
referred to  collectively as the  "Obligations");  provided,  however,  that the
total principal amount


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of indebtedness or obligations secured by the Pledged Stock consisting of shares
of capital  stock of a  corporation  incorporated  in New South  Wales shall not
exceed $4,000,000.

         Accordingly, the Pledgors and the Collateral Agent, on behalf of itself
and each Secured  Party (and each of their  respective  successors  or assigns),
hereby agree as follows:

         SECTION 1.1 Pledge. As security for the payment and performance, as the
case may be, in full of the Obligations,  each Pledgor hereby transfers, grants,
bargains,  sells,  conveys,  hypothe cates, pledges, sets over and delivers unto
the  Collateral  Agent,  its  successors  and assigns,  and hereby grants to the
Collateral  Agent,  its successors and assigns,  for the ratable  benefit of the
Secured Parties,  a security  interest in all of the Pledgor's right,  title and
interest in, to and under (a) the shares of capital stock owned by it and listed
on  Schedule  II hereto  and any shares of  capital  stock of or any  Subsidiary
obtained in the future by the Pledgor and the certificates representing all such
shares (the "Pledged Stock");  provided that the Pledged Stock shall not include
(i), more than 65% of the issued and outstanding  shares of stock of any Foreign
Subsidiary, (ii) to the extent that applicable law requires that a Subsidiary of
the Pledgor issue directors'  qualifying shares, such qualifying shares or (iii)
the Irish Shares or the Related Rights (as both terms are defined  hereinafter);
(b)(i) the debt  securities  listed opposite the name of the Pledgor on Schedule
II hereto,  (ii) any debt  securities  in the future  issued to the  Pledgor and
(iii)  the  promissory  notes  and any other  instruments  evidencing  such debt
securities (the "Pledged Debt  Securities");  (c) all other property that may be
delivered to and held by the Collateral Agent pursuant to the terms hereof;  (d)
subject to Section 5, all payments of principal  or interest,  dividends,  cash,
instruments  and  other  property  from  time to time  received,  receivable  or
otherwise distributed,  in respect of, in exchange for or upon the conversion of
the securities  referred to in clauses (a) and (b) above; (e) subject to Section
5, all rights and  privileges of the Pledgor with respect to the  securities and
other property  referred to in clauses (a), (b), (c) and (d) above;  and (f) all
proceeds of any of the foregoing  (the items  referred to in clauses (a) through
(f) above and the Irish Shares and the Related Rights referred to in Section 1.2
below, being collectively referred to as the "Collateral"). Upon delivery to the
Collateral Agent, (a) any stock  certificates,  notes or other securities now or
hereafter  included  in the  Collateral  (the  "Pledged  Securities")  shall  be
accompanied  by stock  powers  duly  executed in blank or other  instruments  of
transfer  satisfactory to the Collateral Agent and by such other instruments and
documents  as the  Collateral  Agent may  reasonably  request  and (b) all other
property  comprising  part of the  Collateral  shall be  accompanied  by  proper
instruments of assignment duly executed by the applicable Pledgor and such other
instruments or documents as the Collateral  Agent may reasonably  request.  Each
delivery of Pledged Securities shall be accompanied by a schedule describing the
securities theretofore and then being pledged hereunder, which schedule shall be
attached  hereto  as  Schedule  II and  made a part  hereof.  Each  schedule  so
delivered shall supersede any prior schedules so delivered.

         SECTION 1.2 Mortgage over Irish Shares.  Terex as legal and  beneficial
owner of the shares in Terex Aerials Limited ("TAL")  referred to in Schedule II
hereto (the "Irish Shares") hereby  mortgages and charges all its interests both
legal and  beneficial in the Irish  Shares,  including any dividends or interest
paid or payable  in  relation  to the Irish  Shares  and any  rights,  moneys or
property  accruing or offered at any time in relation to the Irish Shares by way
of redemption,  substitution, exchange, bonus or preference, under option rights
or otherwise (the "Related  Rights") to the collateral Agent, its successors and
assigns,  by way of a first mortgage or charge as a continuing  security for the
payment and performance, as the case may be, in full of the Obligations.

         TO HAVE AND TO HOLD the  Collateral,  together  with all right,  title,
interest,  powers,  privileges and preferences pertaining or incidental thereto,
unto the Collateral  Agent, its successors and assigns,  for the ratable benefit
of the Secured Parties,  forever;  subject, however, to the terms, covenants and
conditions hereinafter set forth.

         SECTION 2. Delivery of the Collateral. (a) Each Pledgor agrees promptly
to deliver or cause to be delivered to the Collateral  Agent any and all Pledged
Securities, and any and all



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certificates  or other  instruments  or documents  representing  the  Collateral
(including in the case of the mortgage over the Irish Shares referred to above a
stock  transfer  form executed in blank by Terex in a form  satisfactory  to the
Collateral Agent).

         (b)  Each  Pledgor  will  cause  any   Indebtedness   (except  for  any
intercompany  Indebtedness  not evidenced by notes and subordinated by its terms
to the payment of the Obligations) for borrowed money owed to the Pledgor by any
person to be evidenced by a duly  executed  promissory  note that is pledged and
delivered to the Collateral Agent pursuant to the terms thereof.

         (c) Notwithstanding  anything to the contrary contained in this Section
2 or Section 1 hereof, if any Pledged Securities (whether now owned or hereafter
acquired) are uncertificated  securities,  the respective Pledgor shall promptly
notify  the  Collateral  Agent  thereof,  and shall  promptly  take all  actions
required  to  perfect  the  security  interest  of the  Collateral  Agent  under
applicable  law  (including,  in any event,  under Section 9-115 of the New York
UCC, if  applicable).  Each Pledgor  further  agrees to take such actions as the
Collateral Agent deems reasonably necessary or desirable to effect the foregoing
and to permit the  Collateral  Agent to exercise  any of its rights and remedies
hereunder,  and agrees to provide an opinion of counsel reasonably  satisfactory
to the Collateral Agent (which may be counsel employed by Terex) with respect to
the  creation  and  perfection  of any such  pledge  of  uncertificated  Pledged
Securities promptly upon request of the Collateral Agent.

         SECTION 3.  Representations,  Warranties  and  Covenants.  Each Pledgor
hereby  represents,  warrants  and  covenants,  as to itself and the  Collateral
pledged by it hereunder, to and with the Collateral Agent that:

                  (a) the  Pledged  Stock and the Irish  Shares  represent  that
         percentage  as set forth on Schedule  II of the issued and  outstanding
         shares of each class of the capital  stock of the issuer  with  respect
         thereto;

                  (b) except for the security  interest granted  hereunder,  the
         Pledgor (i) is and will at all times  continue to be the direct  owner,
         beneficially  and of record,  of the Pledged  Securities  indicated  on
         Schedule  II,  (ii) holds the same free and clear of all  Liens,  (iii)
         will make no  assignment,  pledge,  hypothecation  or  transfer  of, or
         create or permit to exist any  security  interest  in or other Lien on,
         the Collateral,  other than pursuant hereto or to the Credit Agreement,
         and (iv) subject to Section 5 and Section 2(c),  will cause any and all
         Collateral,  whether for value paid by the Pledgor or otherwise,  to be
         forthwith  deposited with the Collateral  Agent and pledged or assigned
         hereunder;

                  (c) the Pledgor (i) has the  corporate  power and authority to
         pledge the  Collateral  in the manner hereby done or  contemplated  and
         (ii) will defend its title or interest  thereto or therein  against any
         and all Liens (other than the Lien created by this Agreement),  however
         arising, of all persons whomsoever;

                  (d) no consent of any other person (including  stockholders or
         creditors   of  any   Pledgor)  and  no  consent  or  approval  of  any
         Governmental  Authority or any securities  exchange was or is necessary
         to the validity of the pledge effected hereby;

                  (e) by virtue of the execution and delivery by the Pledgors of
         this  Agreement,  when the Pledged  Securities,  certificates  or other
         documents  representing or evidencing the Collateral  (together with an
         executed  stock  transfer  form in the case of the  Irish  Shares)  are
         delivered to the  Collateral  Agent in accordance  with this  Agreement
         (or,  in the case of  uncertificated  stock,  the  actions  required by
         Section 2(c) are taken),  the Collateral  Agent will obtain a valid and
         perfected  first  lien  upon  and  security  interest  in such  Pledged
         Securities  as  security  for  the  payment  and   performance  of  the
         Obligations;


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                  (f) the pledge  effected  hereby is  effective  to vest in the
         Collateral  Agent, on behalf of the Secured Parties,  the rights of the
         Collateral Agent in the Collateral as set forth herein;

                  (g) all of the  Pledged  Stock and the Irish  Shares have been
         duly   authorized   and   validly   issued   and  are  fully  paid  and
         nonassessable;

                  (h) all  information  set forth herein relating to the Pledged
         Stock and the Irish  Shares is accurate  and  complete in all  material
         respects as of the date hereof; and

                  (i) the pledge of the Pledged Stock pursuant to this Agreement
         does not violate  Regulation G, T, U or X of the Federal  Reserve Board
         or any successor thereto as of the date hereof;

and Terex  covenants,  as the sole  shareholder of TAL, that it will not vote to
amend the  provisions  concerning  the transfer of shares (and,  in  particular,
article 8(b))  contained in the articles of  association of TAL (as amended by a
written  resolution of the single  member of TAL dated 5th March,  1998) without
the prior written consent of the Collateral Agent.

         SECTION  4.  Registration  in  Nominee  Name;  Denominations.  Upon the
occurrence  and during the  continuance  of an Event of Default,  the Collateral
Agent, on behalf of the Secured  Parties,  shall have the right (in its sole and
absolute  discretion) to hold the Pledged Securities in its own name as pledgee,
the  name  of its  nominee  (as  pledgee  or as  sub-agent)  or the  name of the
Pledgors,  endorsed or assigned  in blank or in favor of the  Collateral  Agent.
Each Pledgor will promptly give to the Collateral Agent copies of any notices or
other  communications   received  by  it  with  respect  to  Pledged  Securities
registered  in the name of such  Pledgor.  Upon the  occurrence  and  during the
continuance of an Event of Default, the Collateral Agent shall have the right to
exchange the certificates  representing  Pledged  Securities for certificates of
smaller or larger denominations for any purpose consistent with this Agreement.

         SECTION 5. Voting Rights;  Dividends and Interest,  etc. (a) Unless and
until an Event of Default shall have occurred and be continuing:

                  (i) Each  Pledgor  shall be entitled  to exercise  any and all
         voting and/or other consensual rights and powers inuring to an owner of
         Pledged  Securities or any part thereof for any purpose consistent with
         the terms of this  Agreement,  the Credit  Agreement and the other Loan
         Documents; provided, however, that such Pledgor will not be entitled to
         exercise  any such  right if the result  thereof  could  reasonably  be
         expected to  materially  and adversely  affect the rights  inuring to a
         holder of the Pledged  Securities  or the rights and remedies of any of
         the Secured Parties under this Agreement or the Credit Agreement or any
         other Loan  Document or the ability of the Secured  Parties to exercise
         the same.

                  (ii) The  Collateral  Agent shall  execute and deliver to each
         Pledgor,  or cause to be executed and  delivered to each  Pledgor,  all
         such proxies,  powers of attorney and other instruments as such Pledgor
         may  reasonably  request for the purpose of  enabling  such  Pledgor to
         exercise the voting and/or  consensual rights and powers it is entitled
         to exercise  pursuant to subparagraph (i) above and to receive the cash
         dividends  it is entitled to receive  pursuant  to  subparagraph  (iii)
         below.

                  (iii) Each Pledgor shall be entitled to receive and retain any
         and all cash  dividends,  interest  and  principal  paid on the Pledged
         Securities  to the  extent  and  only  to the  extent  that  such  cash
         dividends,  interest and principal are permitted by, and otherwise paid
         in accordance  with, the terms and conditions of the Credit  Agreement,
         the other Loan  Documents and applicable  laws. All noncash  dividends,
         interest and principal, and all dividends,  interest and principal paid
         or payable in cash or otherwise in  connection  with a partial or total
         liquidation  or  dissolution,  return of  capital,  capital  surplus or
         paid-in surplus, and all other distributions (other than distributions


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         referred  to in the  preceding  sentence)  made on or in respect of the
         Pledged  Securities,  whether  paid or  payable  in cash or  otherwise,
         whether resulting from a subdivision,  combination or  reclassification
         of  the  outstanding  capital  stock  of  the  issuer  of  any  Pledged
         Securities  or received in exchange for Pledged  Securities or any part
         thereof,  or in  redemption  thereof,  or as a  result  of any  merger,
         consolidation,  acquisition  or other  exchange of assets to which such
         issuer may be a party or  otherwise,  shall be and  become  part of the
         Collateral, and, if received by any Pledgor, shall not be commingled by
         such  Pledgor with any of its other funds or property but shall be held
         separate and apart therefrom, shall be held in trust for the benefit of
         the Collateral Agent and shall be forthwith delivered to the Collateral
         Agent in the same form as so received (with any necessary endorsement).

         (b) Upon the  occurrence  and  during  the  continuance  of an Event of
Default, all rights of any Pledgor to dividends, interest or principal that such
Pledgor is  authorized  to receive  pursuant to paragraph  (a)(iii)  above shall
cease,  and all such rights  shall  thereupon  become  vested in the  Collateral
Agent,  which shall have the sole and  exclusive  right and authority to receive
and retain such  dividends,  interest or principal.  All dividends,  interest or
principal  received by the Pledgor  contrary to the provisions of this Section 5
shall  be held in  trust  for the  benefit  of the  Collateral  Agent,  shall be
segregated  from other  property or funds of such Pledgor and shall be forthwith
delivered  to the  Collateral  Agent upon demand in the same form as so received
(with any necessary endorsement). Any and all money and other property paid over
to or received  by the  Collateral  Agent  pursuant  to the  provisions  of this
paragraph  (b) shall be  retained  by the  Collateral  Agent in an account to be
established by the Collateral Agent upon receipt of such money or other property
and shall be applied in accordance  with the  provisions of Section 7. After all
Events of Default have been cured or waived, the Collateral Agent shall,  within
five  Business  Days after all such Events of Default have been cured or waived,
repay to each  Pledgor  all  cash  dividends,  interest  or  principal  (without
interest),  that such Pledgor would otherwise be permitted to retain pursuant to
the terms of paragraph (a)(iii) above and which remain in such account.

         (c) Upon the  occurrence  and  during  the  continuance  of an Event of
Default,  all rights of any Pledgor to exercise the voting and consensual rights
and powers it is  entitled  to exercise  pursuant  to  paragraph  (a)(i) of this
Section 5, and the obligations of the Collateral  Agent under paragraph  (a)(ii)
of this  Section 5, shall  cease,  and all such rights  shall  thereupon  become
vested in the Collateral  Agent,  which shall have the sole and exclusive  right
and authority to exercise such voting and consensual rights and powers, provided
that, unless otherwise  directed by the Required  Lenders,  the Collateral Agent
shall have the right from time to time  following and during the  continuance of
an Event of Default to permit the Pledgors to exercise  such  rights.  After all
Events of Default have been cured or waived, such Pledgor will have the right to
exercise the voting and consensual  rights and powers that it would otherwise be
entitled to exercise pursuant to the terms of paragraph (a)(i) above.

         SECTION 6. Remedies upon Default.  Upon the  occurrence  and during the
continuance of an Event of Default,  subject to applicable  regulatory and legal
requirements, the Collateral Agent may sell the Collateral, or any part thereof,
at  public  or  private  sale  or at any  broker's  board  or on any  securities
exchange,  for cash, upon credit or for future delivery as the Collateral  Agent
shall deem  appropriate.  The  Collateral  Agent shall be authorized at any such
sale (if it deems it advisable to do so) to restrict the prospective  bidders or
purchasers to persons who will  represent and agree that they are purchasing the
Collateral  for  their own  account  for  investment  and not with a view to the
distribution  or sale  thereof,  and  upon  consummation  of any  such  sale the
Collateral  Agent  shall have the right to assign,  transfer  and deliver to the
purchaser or purchasers  thereof the Collateral so sold.  Each such purchaser at
any such sale shall hold the  property  sold  absolutely  free from any claim or
right on the part of any Pledgor,  and, to the extent  permitted  by  applicable
law, the Pledgors  hereby waive all rights of  redemption,  stay,  valuation and
appraisal  any  Pledgor  now has or may at any time in the future have under any
rule of law or statute now existing or hereafter enacted.


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         The Collateral Agent shall give a Pledgor 10 days' prior written notice
(which each Pledgor  agrees is  reasonable  notice within the meaning of Section
9-504(3) of the Uniform Commercial Code as in effect in the State of New York or
its equivalent in other  jurisdictions)  of the Collateral  Agent's intention to
make any sale of such Pledgor's Collateral. Such notice, in the case of a public
sale, shall state the time and place for such sale and, in the case of a sale at
a broker's board or on a securities exchange,  shall state the board or exchange
at which such sale is to be made and the day on which the Collateral, or portion
thereof,  will first be offered  for sale at such  board or  exchange.  Any such
public sale shall be held at such time or times within  ordinary  business hours
and at such  place or  places as the  Collateral  Agent may fix and state in the
notice of such sale. At any such sale, the Collateral, or portion thereof, to be
sold  may be sold in one  lot as an  entirety  or in  separate  parcels,  as the
Collateral  Agent  may (in its  sole and  absolute  discretion)  determine.  The
Collateral Agent shall not be obligated to make any sale of any Collateral if it
shall determine not to do so, regardless of the fact that notice of sale of such
Collateral  shall have been given.  The Collateral  Agent may, without notice or
publication,  adjourn  any  public  or  private  sale or  cause  the  same to be
adjourned  from time to time by  announcement  at the time and  place  fixed for
sale, and such sale may,  without further notice,  be made at the time and place
to which the same was so  adjourned.  In case any sale of all or any part of the
Collateral is made on credit or for future delivery,  the Collateral so sold may
be retained by the Collateral  Agent until the sale price is paid in full by the
purchaser or purchasers  thereof,  but the Collateral  Agent shall not incur any
liability in case any such purchaser or purchasers shall fail to take up and pay
for the Collateral so sold and, in case of any such failure, such Collateral may
be sold again upon like  notice.  At any public (or, to the extent  permitted by
applicable law, private) sale made pursuant to this Section 6, any Secured Party
may bid for or purchase, free from any right of redemption, stay or appraisal on
the part of any Pledgor (all said rights being also hereby waived and released),
the  Collateral  or any part  thereof  offered for sale and may make  payment on
account  thereof by using any claim then due and payable to it from such Pledgor
as a credit against the purchase  price,  and it may, upon  compliance  with the
terms of sale,  hold,  retain  and  dispose  of such  property  without  further
accountability  to such Pledgor  therefor.  For purposes  hereof,  (a) a written
agreement to purchase the Collateral or any portion  thereof shall be treated as
a sale thereof,  (b) the  Collateral  Agent shall be free to carry out such sale
pursuant to such  agreement  and (c) such  Pledgor  shall not be entitled to the
return of the Collateral or any portion thereof subject thereto, notwithstanding
the fact  that  after the  Collateral  Agent  shall  have  entered  into such an
agreement  all Events of Default  shall have been  remedied and the  Obligations
paid in full. As an alternative to exercising the power of sale herein conferred
upon it, the Collateral Agent may proceed by a suit or suits at law or in equity
to  foreclose  upon the  Collateral  and to sell the  Collateral  or any portion
thereof  pursuant to a judgment or decree of a court or courts having  competent
jurisdiction or pursuant to a proceeding by a court-appointed receiver. Any sale
pursuant to the  provisions  of this Section 6 shall be deemed to conform to the
commercially reasonable standards as provided in Section 9-504(3) of the Uniform
Commercial Code as in effect in the State of New York or its equivalent in other
jurisdictions.

         SECTION 7. Application of Proceeds of Sale. The proceeds of any sale of
Collateral pursuant to Section 6, as well as any Collateral  consisting of cash,
shall be applied by the Collateral Agent as follows:

                  FIRST,  to the payment of all  reasonable  costs and  expenses
         incurred  by the  Collateral  Agent in  connection  with  such  sale or
         otherwise in connection with this Agreement, any other Loan Document or
         any of the  Obligations,  including all court costs and the  reasonable
         fees and expenses of its agents and legal counsel, the repayment of all
         advances made by the Collateral Agent hereunder or under any other Loan
         Document  on behalf of any  Pledgor  and any  other  costs or  expenses
         incurred  in  connection  with the  exercise  of any  right  or  remedy
         hereunder or under any other Loan Document;

                  SECOND, to the payment in full of the Obligations (the amounts
         so applied to be  distributed  among the  Secured  Parties  pro rata in
         accordance with the amounts of the Obligations owed to them on the date
         of any such distribution); and


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                  THIRD, to the Pledgors,  their successors or assigns,  or as a
         court of competent jurisdiction may otherwise direct.

         The Collateral  Agent shall have absolute  discretion as to the time of
application  of any such  proceeds,  moneys or balances in accordance  with this
Agreement.  Upon any sale of the Collateral by the Collateral  Agent  (including
pursuant to a power of sale granted by statute or under a judicial  proceeding),
the  receipt of the  purchase  money by the  Collateral  Agent or of the officer
making the sale shall be a sufficient  discharge to the  purchaser or purchasers
of the  Collateral  so sold  and  such  purchaser  or  purchasers  shall  not be
obligated to see to the  application of any part of the purchase money paid over
to the  Collateral  Agent or such  officer or be  answerable  in any way for the
misapplication thereof.

         SECTION 8.  Reimbursement of Collateral Agent. (a) Each Pledgor jointly
and severally  agrees to pay upon demand to the  Collateral  Agent the amount of
any and all reasonable  expenses,  including the reasonable  fees, other charges
and  disbursements  of its  counsel  and of any  experts  or  agents,  that  the
Collateral  Agent may incur in connection  with (i) the  administration  of this
Agreement, (ii) the custody or preservation of, or the sale of, collection from,
or  other  realization  upon,  any  of  the  Collateral,   (iii)  the  exercise,
enforcement or protection of any of the rights of the Collateral Agent hereunder
or (iv) the failure of any  Pledgor to perform or observe any of the  provisions
hereof.

         (b) Without  limitation of its  indemnification  obligations  under the
other Loan Documents, each Pledgor jointly and severally agrees to indemnify the
Collateral  Agent and the  Indemnitees (as defined in Section 9.05 of the Credit
Agreement) against,  and hold each Indemnitee harmless from, any and all losses,
claims, damages,  liabilities and related expenses, including reasonable counsel
fees,  other  charges and  disbursements,  incurred  by or asserted  against any
Indemnitee  arising out of, in any way connected with, or as a result of (i) the
execution  or  delivery  of this  Agreement  or any other Loan  Document  or any
agreement or instrument  contemplated hereby or thereby,  the performance by the
parties hereto of their respective obligations thereunder or the consummation of
the Transactions  and the other  transactions  contemplated  thereby or (ii) any
claim, litigation, investigation or proceeding relating to any of the foregoing,
whether or not any Indemnitee is a party  thereto,  provided that such indemnity
shall not, as to any  Indemnitee,  be  available to the extent that such losses,
claims,  damages,  liabilities or related  expenses are determined by a court of
competent jurisdiction by final and nonappealable judgment to have resulted from
the gross negligence or wilful misconduct of such Indemnitee.

         (c) Any  amounts  payable as  provided  hereunder  shall be  additional
Obligations secured hereby and by the other Security  Documents.  The provisions
of this Section 8 shall remain operative and in full force and effect regardless
of the  termination of this  Agreement,  the  consummation  of the  transactions
contemplated hereby, the repayment of any of the Obligations,  the invalidity or
unenforceability  of any term or provision  of this  Agreement or any other Loan
Document or any  investigation  made by or on behalf of the Collateral  Agent or
any other Secured  Party.  All amounts due under this Section 8 shall be payable
on written  demand  therefor  and shall bear  interest at the rate  specified in
Section 2.07 of the Credit Agreement.

         SECTION 9. Collateral  Agent Appointed  Attorney-in-Fact.  Each Pledgor
hereby appoints the Collateral  Agent the  attorney-in-fact  of such Pledgor for
the purpose of carrying  out the  provisions  of this  Agreement  and taking any
action and executing any instrument that the Collateral Agent may deem necessary
or advisable to  accomplish  the purposes  hereof and without  limitation to the
foregoing  to  execute  and  complete  in favor of the  Collateral  Agent or its
nominees  or of any  purchaser  any  transfers  or  other  documents  which  the
Collateral  Agent may  require  for  perfecting  its title to or for vesting the
Collateral in the Collateral  Agent or its nominees or in any  purchaser,  which
appointment is irrevocable  and coupled with an interest.  The Collateral  Agent
shall have the right, upon the occurrence and during the continuance of an Event
of Default,  with full power of  substitution  either in the Collateral  Agent's
name or in the name of such  Pledgor,  to ask  for,  demand,  sue for,  collect,
receive and give acquittance for any and all moneys due or to become due under


                                       8


and by virtue of any  Collateral,  to endorse checks,  drafts,  orders and other
instruments  for the payment of money  payable to the Pledgor  representing  any
interest or dividend or other distribution  payable in respect of the Collateral
or any part  thereof or on account  thereof and to give full  discharge  for the
same, to settle, compromise, prosecute or defend any action, claim or proceeding
with respect thereto, and to sell, assign, endorse, pledge, transfer and to make
any agreement respecting,  or otherwise deal with, the same; provided,  however,
that nothing herein  contained shall be construed as requiring or obligating the
Collateral  Agent to make any commitment or to make any inquiry as to the nature
or sufficiency of any payment received by the Collateral Agent, or to present or
file any claim or notice,  or to take any action with respect to the  Collateral
or any part thereof or the moneys due or to become due in respect thereof or any
property  covered  thereby.  The Collateral  Agent and the other Secured Parties
shall be  accountable  only for  amounts  actually  received  as a result of the
exercise  of the  powers  granted to them  herein,  and  neither  they nor their
officers, directors, employees or agents shall be responsible to any Pledgor for
any act or failure to act  hereunder,  except for their own gross  negligence or
wilful misconduct.

         SECTION  10.  Waivers;  Amendment.  (a)  No  failure  or  delay  of the
Collateral  Agent in exercising any power or right  hereunder shall operate as a
waiver  thereof,  nor shall any single or partial  exercise of any such right or
power, or any abandonment or  discontinuance of steps to enforce such a right or
power,  preclude  any other or further  exercise  thereof or the exercise of any
other right or power.  The rights and remedies of the Collateral Agent hereunder
and of the Secured Parties under the other Loan Documents are cumulative and are
not  exclusive  of any rights or remedies  that they would  otherwise  have.  No
waiver of any  provisions  of this  Agreement or consent to any departure by any
Pledgor  therefrom  shall in any event be  effective  unless  the same  shall be
permitted  by  paragraph  (b) below,  and then such  waiver or consent  shall be
effective only in the specific  instance and for the purpose for which given. No
notice or demand on any Pledgor in any case shall  entitle  such  Pledgor or any
other  Pledgor  to any other or  further  notice or demand in  similar  or other
circumstances.

         (b) Neither  this  Agreement  nor any  provision  hereof may be waived,
amended or modified except pursuant to a written  agreement entered into between
the  Collateral  Agent and the  Pledgor or Pledgors  with  respect to which such
waiver,  amendment or modification is to apply,  subject to any consent required
in accordance with Section 9.08 of the Credit Agreement.

         SECTION  11.  Securities  Act,  etc.  In  view of the  position  of the
Pledgors in relation to the Pledged  Securities,  or because of other current or
future circumstances,  a question may arise under the Securities Act of 1933, as
now or hereafter in effect,  or any similar statute  hereafter enacted analogous
in purpose or effect (such Act and any such similar statute as from time to time
in effect  being  called the  "Federal  Securities  Laws")  with  respect to any
disposition  of  the  Pledged  Securities  permitted  hereunder.   Each  Pledgor
understands that compliance with the Federal Securities Laws might very strictly
limit the course of conduct of the Collateral Agent if the Collateral Agent were
to attempt to dispose of all or any part of the  Pledged  Securities,  and might
also limit the extent to which or the manner in which any subsequent  transferee
of any Pledged  Securities  could dispose of the same.  Similarly,  there may be
other legal  restrictions or limitations  affecting the Collateral  Agent in any
attempt to dispose of all or part of the  Pledged  Securities  under  applicable
Blue Sky or other state  securities laws or similar laws analogous in purpose or
effect.  Each  Pledgor  recognizes  that  in  light  of  such  restrictions  and
limitations  the  Collateral  Agent may, with respect to any sale of the Pledged
Securities, limit the purchasers to those who will agree, among other things, to
acquire such Pledged Securities for their own account,  for investment,  and not
with a view to the distribution or resale thereof. Each Pledgor acknowledges and
agrees that in light of such restrictions and limitations, the Collateral Agent,
in its sole and absolute discretion, (a) may proceed to make such a sale whether
or not a  registration  statement  for the purpose of  registering  such Pledged
Securities  or part thereof  shall have been filed under the Federal  Securities
Laws and (b) may approach and  negotiate  with a single  potential  purchaser to
effect such sale. Each Pledgor  acknowledges and agrees that any such sale might
result in prices and other terms less  favorable to the seller than if such sale
were a public sale without such restrictions.  In the event of any such sales,


                                       9


the Collateral Agent shall incur no  responsibility or liability for selling all
or any part of the Pledged  Securities at a price that the Collateral  Agent, in
its sole and absolute  discretion,  may in good faith deem reasonable  under the
circumstances, notwithstanding the possibility that a substantially higher price
might have been realized if the sale were deferred until after  registration  as
aforesaid or if more than a single purchaser were approached.  The provisions of
this Section 11 will apply  notwithstanding the existence of a public or private
market upon which the  quotations or sales prices may exceed  substantially  the
price at which the Collateral Agent sells.

         SECTION 12.  Registration,  etc.  Each Pledgor  agrees  that,  upon the
occurrence and during the continuance of an Event of Default  hereunder,  if for
any reason the  Collateral  Agent desires to sell any of the Pledged  Securities
(except for Pledged Securities issued by a Foreign Subsidiary) at a public sale,
it will,  at any time and from time to time,  upon the  written  request  of the
Collateral  Agent,  use its best  efforts to take or to cause the issuer of such
Pledged Securities to take such action and prepare,  distribute and/or file such
documents, as are required or advisable in the reasonable opinion of counsel for
the Collateral Agent to permit the public sale of such Pledged Securities.  Each
Pledgor  further  agrees to indemnify,  defend and hold harmless the  Collateral
Agent, each other Secured Party, any underwriter and their respective  officers,
directors  ,  affiliates  and  controlling  persons  from and  against all loss,
liability, expenses, costs of counsel (including, without limitation, reasonable
fees  and  expenses  to the  Collateral  Agent  of legal  counsel),  and  claims
(including the costs of investigation) that they may incur insofar as such loss,
liability,  expense or claim  arises out of or is based upon any alleged  untrue
statement of a material fact  contained in any  prospectus  (or any amendment or
supplement  thereto) or in any notification or offering circular,  or arises out
of or is based upon any alleged omission to state a material fact required to be
stated  therein  or  necessary  to  make  the  statements  in  any  thereof  not
misleading,  except  insofar  as the same may have  been  caused  by any  untrue
statement  or  omission  based  upon  information  furnished  in writing to such
Pledgor or the issuer of such Pledged  Securities by the Collateral Agent or any
other Secured Party expressly for use therein. Each Pledgor further agrees, upon
such written request referred to above, to use its best efforts to qualify, file
or register,  or cause the issuer of such Pledged Securities to qualify, file or
register,  any of the Pledged  Securities under the Blue Sky or other securities
laws of such  states  as may be  requested  by the  Collateral  Agent  and  keep
effective,  or cause to be kept effective,  all such qualifications,  filings or
registrations. Each Pledgor will bear all costs and expenses of carrying out its
obligations  under this Section 12. Each Pledgor  acknowledges  that there is no
adequate  remedy at law for failure by it to comply with the  provisions of this
Section 12 and that such failure would not be adequately compensable in damages,
and  therefore  agrees that its  agreements  contained in this Section 12 may be
specifically enforced.

         SECTION 13. Security  Interest  Absolute.  All rights of the Collateral
Agent  hereunder,  the grant of a security  interest in the  Collateral  and all
obligations  of each  Pledgor  hereunder,  shall be absolute  and  unconditional
irrespective  of (a) any  lack  of  validity  or  enforceability  of the  Credit
Agreement,  any other Loan  Document,  any agreement  with respect to any of the
Obligations  or  any  other  agreement  or  instrument  relating  to  any of the
foregoing,  (b) any change in the time, manner or place of payment of, or in any
other term of, all or any of the  Obligations,  or any other amendment or waiver
of or any consent to any  departure  from the Credit  Agreement,  any other Loan
Document or any other agreement or instrument  relating to any of the foregoing,
(c) any  exchange,  release or  nonperfection  of any other  collateral,  or any
release or amendment or waiver of or consent to or departure  from any guaranty,
for all or any of the  Obligations  or (d) any  other  circumstance  that  might
otherwise  constitute a defense  available to, or a discharge of, any Pledgor in
respect  of the  Obligations  or in respect of this  Agreement  (other  than the
payment in full of all the Obligations).

         SECTION 14. Termination or Release. (a) This Agreement and the security
interests granted hereby shall terminate when all the Obligations have been paid
in full,  the  Lenders  have no  further  commitment  to lend  under the  Credit
Agreement, the L/C Exposure has been reduced to zero and the Issuing Banks have


                                       10


no further obligation to issue Letters of Credit under the Credit Agreement.

         (b) Upon any sale or other  transfer by any  Pledgor of any  Collateral
that is  permitted  under  the  Credit  Agreement  to any  person  that is not a
Pledgor, or, upon the effectiveness of any written consent to the release of the
security  interest granted hereby in any Collateral  pursuant to Section 9.08(b)
of the Credit  Agreement,  the  security  interest in such  Collateral  shall be
automatically released.

         (c) In connection with any termination or release pursuant to paragraph
(a) or (b), the  Collateral  Agent shall execute and deliver to any Pledgor,  at
such Pledgor's expense, all documents that such Pledgor shall reasonably request
to evidence such termination or release. Any execution and delivery of documents
pursuant  to this  Section 14 shall be without  recourse  to or  warranty by the
Collateral Agent.

         SECTION 15. Notices.  All communications and notices hereunder shall be
in writing and given as provided in Section  9.01 of the Credit  Agreement.  All
communications and notices hereunder to any Subsidiary Pledgor shall be given to
it in care of Terex.

         SECTION 16. Further Assurances.  Each Pledgor agrees to do such further
acts and  things,  and to  execute  and  deliver  such  additional  conveyances,
assignments, agreements and instruments, as the Collateral Agent may at any time
reasonably request in connection with the administration and enforcement of this
Agreement  or with  respect to the  Collateral  or any part  thereof or in order
better to assure and confirm unto the  Collateral  Agent its rights and remedies
hereunder.

         SECTION 17. Binding Effect; Several Agreement; Assignments. Whenever in
this Agreement any of the parties hereto is referred to, such reference shall be
deemed to include the successors  and assigns of such party;  and all covenants,
promises and  agreements  by or on behalf of any Pledgor  that are  contained in
this  Agreement  shall  bind and  inure to the  benefit  of its  successors  and
assigns.  This  Agreement  shall  become  effective  as to  any  Pledgor  when a
counterpart  hereof executed on behalf of such Pledgor shall have been delivered
to the  Collateral  Agent and a  counterpart  hereof shall have been executed on
behalf of the  Collateral  Agent,  and  thereafter  shall be  binding  upon such
Pledgor and the Collateral  Agent and their  respective  successors and assigns,
and shall inure to the benefit of such  Pledgor,  the  Collateral  Agent and the
other Secured Parties, and their respective successors and assigns,  except that
no Pledgor  shall have the right to assign its rights  hereunder or any interest
herein or in the Collateral (and any such attempted  assignment  shall be void),
except as expressly  contemplated by this Agreement or the other Loan Documents.
If all of the  capital  stock of a Pledgor  is sold,  transferred  or  otherwise
disposed  of to a  person  that  is not an  Affiliate  of  Terex  pursuant  to a
transaction  permitted  by Section  6.05 of the Credit  Agreement,  such Pledgor
shall be released from its  obligations  under this  Agreement  without  further
action.  This Agreement shall be construed as a separate  agreement with respect
to each Pledgor and may be amended, modified,  supplemented,  waived or released
with  respect to any  Pledgor  without  the  approval  of any other  Pledgor and
without affecting the obligations of any other Pledgor hereunder

         SECTION 18.  Survival of Agreement;  Severability.  (a) All  covenants,
agreements,  representations  and warranties  made by each Pledgor herein and in
the certificates or other  instruments  prepared or delivered in connection with
or pursuant to this  Agreement or any other Loan Document shall be considered to
have been relied upon by the Collateral  Agent and the other Secured Parties and
shall  survive  the making by the  Lenders of the Loans and the  issuance of the
Letters of Credit by the Issuing Banks,  regardless of any investigation made by
the Secured  Parties or on their  behalf,  and shall  continue in full force and
effect as long as the  principal  of or any accrued  interest on any Loan or any
other fee or amount  payable under this  Agreement or any other Loan Document is
outstanding  and unpaid or the L/C  Exposure  does not equal zero and as long as
the Commitments and the L/C Commitments have not been terminated.


                                       11


         (b) In the event any one or more of the  provisions  contained  in this
Agreement should be held invalid,  illegal or unenforceable in any respect,  the
validity,  legality and  enforceability  of the remaining  provisions  contained
herein shall not in any way be affected or impaired thereby (it being understood
that the invalidity of a particular provision in a particular jurisdiction shall
not in and of  itself  affect  the  validity  of  such  provision  in any  other
jurisdiction).  The parties shall endeavor in good-faith negotiations to replace
the invalid,  illegal or  unenforceable  provisions  with valid  provisions  the
economic  effect of which  comes as close as  possible  to that of the  invalid,
illegal or unenforceable provisions.

         SECTION 19.  Governing  Law. THIS  AGREEMENT  SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

         SECTION 20. Counterparts. This Agreement may be executed in two or more
counterparts, each of which shall constitute an original, but all of which, when
taken together,  shall constitute a single contract (subject to Section 17), and
shall  become  effective  as  provided  in Section  17.  Delivery of an executed
counterpart  of a signature  page to this  Agreement by  facsimile  transmission
shall be as effective  as delivery of a manually  executed  counterpart  of this
Agreement.

         SECTION  21.  Rules of  Interpretation.  The  rules  of  interpretation
specified in Section 1.02 of the Credit  Agreement  shall be  applicable to this
Agreement.  Section  headings used herein are for convenience of reference only,
are not part of this Agreement and are not to affect the  construction of, or to
be taken into consideration in interpreting this Agreement.

         SECTION  22.  Jurisdiction;  Consent to Service  of  Process.  (a) Each
Pledgor  hereby  irrevocably  and  unconditionally  submits,  for itself and its
property,  to the  nonexclusive  jurisdiction  of any New  York  State  court or
Federal court of the United States of America  sitting in New York City, and any
appellate court from any thereof,  in any action or proceeding arising out of or
relating to this Agreement or the other Loan  Documents,  or for  recognition or
enforcement of any judgment,  and each of the parties hereto hereby  irrevocably
and unconditionally  agrees that, to the extent permitted by applicable law, all
claims in respect of any such action or proceeding  may be heard and  determined
in such New York  State or, to the  extent  permitted  by law,  in such  Federal
court.  Each of the  parties  hereto  agrees  that a final  judgment in any such
action  or  proceeding  shall  be  conclusive  and  may  be  enforced  in  other
jurisdictions  by suit on the judgment or in any other  manner  provided by law.
Nothing in this Agreement  shall affect any right that the  Collateral  Agent or
any other  Secured  Party may  otherwise  have to bring any action or proceeding
relating to this  Agreement or the other Loan  Documents  against any Pledgor or
its properties in the courts of any jurisdiction.

         (b) Each Pledgor hereby irrevocably and unconditionally  waives, to the
fullest  extent it may legally and  effectively do so, any objection that it may
now or hereafter  have to the laying of venue of any suit,  action or proceeding
arising out of or relating to this  Agreement or the other Loan Documents in any
New York State or Federal court.  Each of the parties hereto hereby  irrevocably
waives,  to the fullest extent  permitted by law, the defense of an inconvenient
forum to the maintenance of such action or proceeding in any such court.

         (c) Each party to this  Agreement  irrevocably  consents  to service of
process in the manner  provided  for  notices  in  Section  15.  Nothing in this
Agreement  will affect the right of any party to this Agreement to serve process
in any other manner permitted by law.

         SECTION 23. Waiver Of Jury Trial.  EACH PARTY HERETO HEREBY WAIVES,  TO
THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL
BY JURY IN RESPECT OF ANY  LITIGATION  DIRECTLY  OR  INDIRECTLY  ARISING OUT OF,
UNDER OR IN CONNECTION WITH THIS AGREEMENT. EACH PARTY HERETO (A) CERTIFIES THAT
NO  REPRESENTATIVE,  AGENT OR  ATTORNEY  OF ANY  OTHER  PARTY  HAS  REPRESENTED,
EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF


                                       12


LITIGATION,  SEEK TO ENFORCE THE FOREGOING WAIVER AND (B)  ACKNOWLEDGES  THAT IT
AND THE OTHER PARTIES  HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY,
AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION.

         SECTION 24. Additional Pledgors. Pursuant to Section 5.11 of the Credit
Agreement,  each Domestic Subsidiary of Terex that was not in existence or not a
Domestic  Subsidiary on the date of the Credit Agreement is required to enter in
this  Agreement as a Subsidiary  Pledgor upon becoming a Domestic  Subsidiary if
such  Domestic  Subsidiary  owns or  possesses  property of a type that would be
considered Collateral  hereunder.  Upon execution and delivery by the Collateral
Agent and a Subsidiary of an instrument in the form of Annex 1, such  Subsidiary
shall become a Subsidiary Pledgor hereunder with the same force and effect as if
originally named as a Subsidiary  Pledgor herein.  The execution and delivery of
such  instrument  shall not require the  consent of any Pledgor  hereunder.  The
rights and obligations of each Pledgor  hereunder shall remain in full force and
effect  notwithstanding the addition of any new Subsidiary Pledgor as a party to
this Agreement.

         SECTION 25.  Credit  Agreement.  Notwithstanding  any provision of this
Agreement to the contrary,  each Pledgor may do any act or omit to do any act or
cause or permit any  condition  or  circumstance  to exist,  in each case to the
extent expressly permitted by the Credit Agreement.

         IN  WITNESS  WHEREOF,  the  parties  hereto  have  duly  executed  this
Agreement as of the day and year first above written.


                                   TEREX CORPORATION,

                                     by
                                       --------------------------
                                        Name:
                                        Title:


                                   THE SUBSIDIARY PLEDGORS LISTED ON
                                   SCHEDULE I HERETO,

                                     by
                                       --------------------------
                                       Name:
                                       Title: Authorized Officer


                                   CREDIT SUISSE FIRST BOSTON, as Collateral
                                   Agent,

                                     by
                                       --------------------------
                                       Name:
                                       Title:  Authorized Officer


                                     by
                                       --------------------------
                                       Name:
                                       Title:  Authorized Officer



                                       13


                                                            Schedule I to the
                                                            Pledge Agreement


                               SUBSIDIARY PLEDGORS


                 Name                                [Address]





                                       14

                                                             

                                                           Schedule II to the
                                                             Pledge Agreement





                                  CAPITAL STOCK



   Issuer     Number of      Registered     Number and         Percentage of
              Certificate    Owner          Class of Shares    Shares





                                 DEBT SECURITIES


   Issuer       Principal         Date of Note          Maturity Date
                Amount




                                       1




                                    SUPPLEMENT  NO.  dated as of , to the PLEDGE
                           AGREEMENT  dated  as of March 6,  1998,  among  TEREX
                           CORPORATION,  a Delaware  corporation  ("Terex")  and
                           each  subsidiary  of the Terex  listed on  Schedule I
                           hereto   (each   such   subsidiary   individually   a
                           "Subsidiary    Pledgor"   and    collectively,    the
                           "Subsidiary Pledgors";  Terex and Subsidiary Pledgors
                           are   referred   to   collectively   herein   as  the
                           "Pledgors")  and CREDIT SUISSE FIRST  BOSTON,  a bank
                           organized  under  the  laws  of  Switzerland,  acting
                           through its New York branch  ("CSFB"),  as collateral
                           agent (in such capacity,  the "Collateral Agent") for
                           the  Secured   Parties  (as  defined  in  the  Credit
                           Agreement referred to below)

         A. Reference is made to (a) the Credit  Agreement  dated as of March 6,
1998 (as amended,  supplemented  or otherwise  modified  from time to time,  the
"Credit  Agreement"),  among Terex, Terex Equipment Limited, a company organized
under the laws of Scotland,  P.P.M.  S.A., a company organized under the laws of
the Republic of France,  Unit Rig  (Australia)  Pty.  Ltd., a company  organized
under the laws of New South Wales, and P.P.M.  Sp.A., a company  organized under
the laws of the  Republic  of  Italy,  the  Lenders  (as  defined  in  Article I
thereto),  the  Issuing  Banks (as  defined in Article I thereto)  and CSFB,  as
administrative  agent and as collateral agent for the Lenders, (b) the Guarantee
Agreement  dated as of March 6,  1998 (as  amended,  supplemented  or  otherwise
modified from time to time,  the  "Subsidiary  Guarantee  Agreement")  among the
Subsidiary  Pledgors and the  Collateral  Agent and (c) the Guarantee  Agreement
dated as of March 6, 1998 (as amended,  supplemented or otherwise  modified from
time to time, the "Terex Guarantee  Agreement") between Terex and the Collateral
Agent.

         B. Capitalized terms used herein and not otherwise defined herein shall
have the meanings assigned to such terms in the Credit Agreement.

         C. The  Pledgors  have  entered  into the Pledge  Agreement in order to
induce  the  Lenders  to make Loans and the  Issuing  Banks to issue  Letters of
Credit.  Pursuant  to  Section  5.11  of the  Credit  Agreement,  each  Domestic
Subsidiary that was not in existence or not a Domestic Subsidiary on the date of
the  Credit  Agreement  is  required  to enter into the  Pledge  Agreement  as a
Subsidiary  Pledgor  upon  becoming  a  Domestic  Subsidiary  if  such  Domestic
Subsidiary  owns or  possesses  property  of a type  that  would  be  considered
Collateral  under the Pledge  Agreement.  Pursuant to Section 5.13 of the Credit
Agreement,  Foreign  Subsidiaries  of Terex may be  required  to enter  into the
Pledge  Agreement as  Subsidiary  Pledgors.  Section 24 of the Pledge  Agreement
provides that such Subsidiaries may become Subsidiary  Pledgors under the Pledge
Agreement  by  execution  and  delivery  of an  instrument  in the  form of this
Supplement.  The  undersigned  Subsidiary  (the "New Pledgor") is executing this
Supplement in accordance with the requirements of the Credit Agreement to become
a Subsidiary  Pledgor under the Pledge  Agreement in order to induce the Lenders
to make  additional  Loans and the Issuing Bank to issue  additional  Letters of
Credit and as  consideration  for Loans  previously  made and  Letters of Credit
previously issued.

         Accordingly, the Collateral Agent and the New Pledgor agree as follows:

         SECTION 1. In accordance with Section 24 of the Pledge  Agreement,  the
New Pledgor by its signature below becomes a Pledgor under the Pledge  Agreement
with the same force and effect as if  originally  named therein as a Pledgor and
the New Pledgor  hereby agrees (a) to all the terms and provisions of the Pledge
Agreement  applicable  to it as a  Pledgor  thereunder  and (b)  represents  and
warrants that the  representations  and warranties made by it as a Pledgor there
under are true and correct on and as of the date hereof.  In  furtherance of the
foregoing,  the New Pledgor, as security for the payment and performance in full
of the Obligations (as defined in the Pledge Agreement),  does hereby create and
grant to the Collateral  Agent,  its successors and assigns,  for the benefit of
the Secured Parties,  their successors and assigns,  a security  interest in and
lien  on all of the  New  Pledgor's  right,  title  and  interest  in and to the
Collateral  (as  defined  in the  Pledge  Agreement)  of the New  Pledgor.  Each
reference to a "Subsidiary Pledgor" or a


                                       2



"Pledgor"  in the Pledge  Agreement  shall be deemed to include the New Pledgor.
The Pledge Agreement is hereby incorporated herein by reference.

         SECTION 2. The New Pledgor  represents  and warrants to the  Collateral
Agent  and the  other  Secured  Parties  that  this  Supplement  has  been  duly
authorized,  executed and delivered by it and constitutes  its legal,  valid and
binding obligation, enforceable against it in accordance with its terms, subject
to applicable bankruptcy, insolvency,  reorganization,  moratorium or other laws
affecting  creditors'  rights  generally  and subject to general  principles  of
equity, regardless of whether considered in a proceeding in equity or at law.

         SECTION 3. This  Supplement  may be executed in  counterparts,  each of
which shall  constitute an original,  but all of which when taken together shall
constitute a single  contract.  This Supplement  shall become effective when the
Collateral Agent shall have received  counterparts of this Supplement that, when
taken together, bear the signatures of the New Pledgor and the Collateral Agent.
Delivery  of  an  executed  signature  page  to  this  Supplement  by  facsimile
transmission  shall be as effective as delivery of a manually signed counterpart
of this Supplement.

         SECTION 4. The New Pledgor  hereby  represents  and  warrants  that set
forth on Schedule I attached  hereto is a true and  correct  schedule of all its
Pledged Securities.

         SECTION  5.  Except  as  expressly   supplemented  hereby,  the  Pledge
Agreement shall remain in full force and effect.

         SECTION 6. THIS  SUPPLEMENT  SHALL BE  GOVERNED  BY, AND  CONSTRUED  IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

         SECTION 7. In case any one or more of the provisions  contained in this
Supplement  should be held  invalid,  illegal or  unenforceable  in any respect,
neither party hereto shall be required to comply with such provision for so long
as such  provision  is held to be  invalid,  illegal or  unenforceable,  but the
validity,  legality and  enforceability  of the remaining  provisions  contained
herein and in the Pledge Agreement shall not in any way be affected or impaired.
The parties  hereto shall  endeavor in  good-faith  negotiations  to replace the
invalid,  illegal or unenforceable provisions with valid provisions the economic
effect of which comes as close as possible  to that of the  invalid,  illegal or
unenforceable provisions.

         SECTION 8. All communications and notices hereunder shall be in writing
and given as provided in Section 15 of the Pledge Agreement.  All communications
and notices hereunder to the New Pledgor shall be given to it in care of Terex.

         SECTION 9. The Collateral Agent shall be reimbursed, in accordance with
Section  9.05(a)  of the  Credit  Agreement,  for its  reasonable  out-of-pocket
expenses  incurred in connection with this Supplement,  including the reasonable
fees, other charges and disbursements of counsel for the Collateral Agent.


         IN WITNESS WHEREOF,  the New Pledgor and the Collateral Agent have duly
executed this  Supplement  to the Pledge  Agreement as of the day and year first
above written.


                                     [Name of New Pledgor],

                                       by
                                         --------------------------------
                                         Name:
                                         Title:
                                         Address:




                                      CREDIT SUISSE FIRST BOSTON, as
                                      Collateral Agent,

                                       by
                                         --------------------------------
                                         Name:
                                         Title:


                                       by
                                         --------------------------------
                                         Name:
                                         Title:



                                       3


                                                                Schedule I to
                                                               Supplement No.
                                                      to the Pledge Agreement




                     Pledged Securities of the New Pledgor



                                 CAPITAL STOCK


   Issuer     Number of       Registered    Number and         Percentage of
              Certificate     Owner         Class of Shares    Shares





                                 DEBT SECURITIES


   Issuer          Principal         Date of Note           Maturity Date
                   Amount