POWER OF ATTORNEY


	I, Franklin Chang-Diaz, Director of Cummins Inc. (the
"Corporation"), hereby authorize and designate each of Marya M. Rose,
Mark J. Sifferlen, Richard E. Harris, Marsha L. Hunt and Patrick J.
Ward, my agent and attorney-in-fact, with full power of substitution,
to:

	(1)	prepare and sign on my behalf any Form 3, Form 4 or
                Form 5, and any amendments thereto, under Section 16
                of the Securities Exchange Act of 1934 and file the
                same with the Securities and Exchange Commission and
                each stock exchange on which the Corporation's stock
                is listed;

	(2)	prepare and sign on my behalf any Form 144 Notice,
	        and any amendments thereto, under the Securities Act
                of 1933 and file the same with the Securities and
                Exchange Commission; and

	(3)	do anything else which any of them in his or her
                discretion deems necessary or proper in connection
                with the foregoing.

	This power of attorney shall remain in effect as long as I am
subject to Section 16 with respect to the Corporation, and shall not be
affected by my subsequent disability or incompetence, unless otherwise
revoked in writing by the undersigned.



	Dated:  12/01/2009	Signed: /s/ Dr. Franklin R. Chang-Diaz
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