PRODUCT SUPPORT PROGRAM FOR REPLACING THE SERVICE REPLACEMENT SPIDER AND BEARING GROUP (UNIVERSAL JOINT) ON THE ENGINE TO PUMP DRIVE DRIVESHAFT ON CERTAIN 793D OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE SERVICE REPLACEMENT SPIDER AND BEARING GROUP (UNIVERSAL JOINT) ON THE ENGINE TO PUMP DRIVE DRIVESHAFT ON CERTAIN 793D OFF-HIGHWAY TRUCKS

Usage:

REBE7845-01

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19Jan2012

(Revised 02Feb2012)

U-33

A-30

D-33

O-34

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*Before/After*	PRODUCT SUPPORT PROGRAM FOR REPLACING THE SERVICE REPLACEMENT SPIDER AND BEARING GROUP (UNIVERSAL JOINT) ON THE ENGINE TO PUMP DRIVE DRIVESHAFT ON CERTAIN 793D OFF-HIGHWAY TRUCKS
3253		PS43488

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NOTE:

This Program must be administered either before or after failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS43488" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. If administered after failure, use "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

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NOTE:

The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.

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NOTE:	This Revised Service Letter replaces the 19Jan2012 Service Letter. Changes have been made to the Service Claim Allowances.

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TERMINATION DATE

31Jan2014

PROBLEM

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The parts service 2T3013 Spider and Bearing Groups (u-joints) for the new 8.5C PTO drive shaft assembly on certain 793D Off-Highway Trucks need to be inspected and replaced if necessary. The 2T3013 Spider and Bearing Group is a service parts replacement of the original spider group that comes from the supplier in the 339-6380 Universal Joint Group. This 2T3013 Spider and Bearing Group may show signs of premature wear.
Vibration and noise are the primary indicators of a u-joint/spider group failure or pending failure, and periodic visual inspection of the service u-joints for discoloration or grease loss should be done. If any of these signs are evident, the u-joints should be changed as soon as any of these things are noticed.

AFFECTED PRODUCT

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Model	Identification Number
793D	FDB00105-01612

PARTS NEEDED

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Qty	Part Number	Description
16	0S1604	BOLT
2	3908908	UNIV JOINT AS
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 7% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.

ACTION REQUIRED

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This service letter should only apply to those 339-6380 Universal Joint Groups that have had the original u-joints/spider groups removed and replaced with the 2T3013 part number from the parts system (Image 2). If the original u-joints/spider groups that came with the 339-6380 (Image 1 with Cat name casted on bearing caps) are still running in that assembly, they should be left on the machine until PCR.
To replace the Spider and Bearing Groups remove the driveshaft per D&A Service Manual RENR8332.

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Image1

Image2

SERVICE CLAIM ALLOWANCES

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Product smu/age whichever comes first	Caterpillar		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
0-12000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 4.0-hour job If there has been a previous repair, part age/hours will apply. Retain a copy of the previous repair invoice in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim.

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