<DOCUMENT>
<TYPE>EX-4
<SEQUENCE>3
<FILENAME>ex4-7.txt
<DESCRIPTION>EXHIBIT 4-7 SIXTH SUPP. INDENTURE
<TEXT>









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                                TEREX CORPORATION

                                  $150,000,000

                    8-7/8% Senior Subordinated Notes due 2008

                        ---------------------------------

                          SIXTH SUPPLEMENTAL INDENTURE

                           Dated as of October 1, 2001

                        --------------------------------

                    UNITED STATES TRUST COMPANY OF NEW YORK,

                                     Trustee



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<PAGE>
                          SIXTH SUPPLEMENTAL INDENTURE


          SIXTH  SUPPLEMENTAL  INDENTURE,  dated as of October 1, 2001,  between
TEREX  CORPORATION,  a Delaware  corporation (the "Company"),  and UNITED STATES
TRUST COMPANY OF NEW YORK, a New York corporation, as trustee (the "Trustee").

          WHEREAS,  the Company,  and Terex Cranes, Inc., Koehring Cranes, Inc.,
PPM Cranes,  Inc., Payhauler Corp.,  Terex-Telelect  Inc., Terex Aerials,  Inc.,
Terex-Ro  Corporation,  Terex Mining Equipment,  Inc., O & K Orenstein & Koppel,
Inc., The American Crane Corporation and Amida  Industries,  Inc., as guarantors
(collectively,  the "Subsidiary Guarantors"),  and the Trustee are parties to an
Indenture dated as of March 31, 1998, as amended by First Supplemental Indenture
dated as of September 23, 1998,  and as further  amended by Second  Supplemental
Indenture  dated  as  of  April  1,  1999,  and  as  further  amended  by  Third
Supplemental  Indenture  dated as of July 29,  1999,  and as further  amended by
Fourth  Supplemental  Indenture  dated as of August  26,  1999,  and as  further
amended  by  Fifth  Supplemental  Indenture  dated as of March  29,  2001  (said
Indenture,  as it may heretofore or hereafter from time to time be amended,  the
"Indenture")   providing  for  the  issuance  of  the  Company's  8-7/8%  Senior
Subordinated Notes due 2008 (the "Notes");

          WHEREAS, the Company has acquired all of the outstanding capital stock
of CMI Corporation ("CMI");

          WHEREAS,  pursuant  to the terms of the  Indenture,  CMI has  become a
Restricted  Subsidiary  organized  under the laws of the United  States  and, as
such, the Company is required to cause CMI to execute and deliver a supplemental
indenture and the Subsidiary Guarantee endorsed on the Notes; and

          WHEREAS, the Company, the Subsidiary Guarantors and the Trustee desire
to amend the Indenture to add CMI as a Subsidiary Guarantor under the Indenture.

          NOW, THEREFORE,  the Company, the Subsidiary  Guarantors,  CMI and the
Trustee agree as follows for the equal and ratable benefit of the Holders of the
Notes.

                                    ARTICLE 1

                           AMENDMENT TO THE INDENTURE

          Section 1.01. CMI shall hereby become a Subsidiary Guarantor under the
Indenture  effective as of the date hereof, and as such shall be entitled to all
the benefits and be subject to all the  obligations,  of a Subsidiary  Guarantor
thereunder.  CMI  agrees to be bound by all those  provisions  of the  Indenture
binding upon a Subsidiary Guarantor.

                                    ARTICLE 2

                                  MISCELLANEOUS

          Section 2.01. The supplement to the Indenture effected hereby shall be
binding upon all Holders of the Notes, their transferees and assigns.  All Notes
issued and  outstanding  on the date hereof  shall be deemed to  incorporate  by
reference or include the supplement to the Indenture effected hereby.
<PAGE>

          Section  2.02.  All terms  used in this Sixth  Supplemental  Indenture
which are defined in the  Indenture  shall have the  meanings  specified  in the
Indenture,  unless the context of this Sixth  Supplemental  Indenture  otherwise
requires.

          Section 2.03. This Sixth Supplemental Indenture shall become a binding
agreement between the parties when counterparts  hereof shall have been executed
and delivered by each of the parties hereto.

          Section 2.04.  This Sixth  Supplemental  Indenture shall be construed,
interpreted and the rights of the parties determined in accordance with the laws
of the State of New York, as applied to contracts made and performed  within the
State of New York, without regard to principles of conflicts of law.

          Section  2.05.  This Sixth  Supplemental  Indenture may be executed in
several counterparts,  each of which shall be an original and all of which shall
constitute but one and the same amendment.

          Section  2.06.  The  recitals  contained  in this  Sixth  Supplemental
Indenture  are  made  by the  Company  and  not by the  Trustee  and  all of the
provisions  contained in the  Indenture,  in respect of the rights,  privileges,
immunities,  powers and duties of the  Trustee  shall be  applicable  in respect
thereof as fully and with like effect as if set forth herein in full.

         IN WITNESS WHEREOF, the parties hereto have caused this Sixth
Supplemental Indenture to be duly executed as of the date first above written.

                                         TEREX CORPORATION



                                        By:___________________________
                                         Name:  Joseph F. Apuzzo
ATTEST:                                  Title: Vice President-Corporate Finance

--------------------
Eric I Cohen, Secretary



                                               UNITED STATES TRUST COMPANY
                                                 OF NEW YORK, as Trustee


                                               By_________________________
                                                  Name:
ATTEST:                                           Title:

---------------------


<PAGE>


                (Signature Page to Sixth Supplemental Indenture)




                                                SUBSIDIARY GUARANTORS:


                                           KOEHRING CRANES, INC.


                                           By:___________________________
                                           Name: Eric I Cohen
                                           Title: Vice President


                                           PAYHAULER CORP.


                                           By:___________________________
                                           Name: Eric I Cohen
                                           Title: Vice President


                                           PPM CRANES, INC.


                                           By:___________________________
                                           Name: Eric I Cohen
                                           Title: Vice President


                                           TEREX CRANES, INC.


                                           By:___________________________
                                           Name: Eric I Cohen
                                           Title: Vice President


                                           TEREX MINING EQUIPMENT, INC.


                                           By:___________________________
                                           Name: Eric I Cohen
                                           Title: Vice President





<PAGE>


                (Signature Page to Sixth Supplemental Indenture)




                                         TEREX-RO CORPORATION


                                         By:___________________________
                                         Name: Eric I Cohen
                                         Title: Vice President


                                         TEREX-TELELECT, INC.


                                         By:___________________________
                                         Name: Eric I Cohen
                                         Title: Vice President


                                         THE AMERICAN CRANE CORPORATION


                                         By:___________________________
                                         Name: Eric I Cohen
                                         Title: Vice President


                                         O&K ORENSTEIN & KOPPEL, INC.


                                         By:___________________________
                                         Name: Eric I Cohen
                                         Title: Vice President


                                         AMIDA INDUSTRIES, INC.


                                         By:___________________________
                                         Name: Eric I Cohen
                                         Title: Vice President




<PAGE>


                (Signature Page to Sixth Supplemental Indenture)



                              CEDARAPIDS, INC.


                         By:___________________________
                              Name: Eric I Cohen
                              Title: Vice President


                              STANDARD HAVENS, INC.


                         By:___________________________
                              Name: Eric I Cohen
                              Title: Vice President


                              STANDARD HAVENS PRODUCTS, INC.


                         By:___________________________
                              Name: Eric I Cohen
                              Title: Vice President


                              BL-PEGSON (USA), INC.


                         By:___________________________
                              Name: Eric I Cohen
                              Title: Vice President


                              BENFORD AMERICA, INC.


                         By:___________________________
                              Name: Eric I Cohen
                              Title: Vice President




<PAGE>


                (Signature Page to Sixth Supplemental Indenture)



                                            COLEMAN ENGINEERING, INC.


                                         By:___________________________
                                            Name: Eric I Cohen
                                            Title: Vice President


                                            EARTHKING, INC.


                                        By:___________________________
                                            Name: Eric I Cohen
                                            Title: Secretary


                                            FINLAY HYDRASCREEN USA, INC.


                                        By:___________________________
                                            Name: Eric I Cohen
                                            Title: Vice President


                                            POWERSCREEN HOLDINGS USA, INC.


                                        By:___________________________
                                            Name: Eric I Cohen
                                            Title: Vice President


                                            POWERSCREEN INTERNATIONAL LLC


                                        By:___________________________
                                            Name: Eric I Cohen
                                            Title: Vice President




<PAGE>


                (Signature Page to Sixth Supplemental Indenture)



                                            POWERSCREEN NORTH AMERICA, INC.


                                        By:___________________________
                                            Name: Eric I Cohen
                                            Title: Vice President


                                            POWERSCREEN USA, LLC


                                        By:___________________________
                                            Name: Eric I Cohen
                                            Title: Vice President


                                            ROYER INDUSTRIES, INC.


                                        By:___________________________
                                            Name: Eric I Cohen
                                            Title: Vice President


                                            TEREX BARTELL, INC.


                                        By:___________________________
                                            Name: Eric I Cohen
                                            Title: Vice President


                                            CMI CORPORATION


                                        By:___________________________
                                            Name: Eric I Cohen
                                            Title: Vice President




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