Caterpillar (CAT) 10-Q 2002 Q3 Quarterly report

EXHIBIT 99.1
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Quarterly Report of Caterpillar Inc. (the "Company") on Form 10-Q for the period ending September 30, 2002 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of our knowledge:
(1)	The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities and Exchange Act of 1934; and
(2)	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

November 12, 2002	/s/ Glen A. Barton	Chairman of the Board and Chief Executive Officer
	(Glen A. Barton)
November 12, 2002	/s/ F. Lynn McPheeters	Chief Financial Officer
	(F. Lynn McPheeters)