PRODUCT SUPPORT PROGRAM FOR REPLACING THE DIFFERENTIAL AND BEVEL GEAR GROUP ON CERTAIN 993K WHEEL LOADERS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE DIFFERENTIAL AND BEVEL GEAR GROUP ON CERTAIN 993K WHEEL LOADERS

Usage:

REBE6798-00

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27Apr2011

U-175

A-141

D-159

O-158

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*After Failure Only*	PRODUCT SUPPORT PROGRAM FOR REPLACING THE DIFFERENTIAL AND BEVEL GEAR GROUP ON CERTAIN 993K WHEEL LOADERS
3258 3256		PS52022

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NOTE:

This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS52022" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "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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TERMINATION DATE

30Apr2015

PROBLEM

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The existing differential carrier bearings (1M6573/9M2744 and 4B9373/4B9374) in the 242-8673 Gear Gp. can fail on certain 993K Large Wheel Loaders. If the existing differential carrier bearings fail, it can/will lead to resultant damage throughout the gear group and axle assembly.

AFFECTED PRODUCT

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Model	Identification Number
993K	LWA00421-00429 Z9K00269-00402

PARTS NEEDED

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Qty	Part Number	Description
7	1U9891	ADDITIVE-OIL
1	6D1355	SEAL-O RING
2	8T3013	SEAL-O RING
1	3679408	GEAR GP-DIFF& -A
1	OIL	TDTO OIL - REFER TO THE OMM
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 2% 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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If it is determined that the differential carrier bearings have failed, replace the current 242-8673 Differential and Bevel Gear Group with the new 367-9408 Differential and Bevel Gear Group or as necessary if the following conditions are met: iron particle levels are greater than 700 PPM and chromium particle levels are greater than 4 PPM. The following conditions are determined by regularly monitoring the recommended SOS sampling along with magnetic plug inspection and filter media inspection.

Refer to Disassembly and Assembly Manual, KENR5817, for the remove, disassemble, assemble, and install procedures on the differential and bevel gear.

Axle (Front or Rear) - Remove and Install

Axle Shaft - Remove and Install

Gear Group - Remove

Gear Group - Install

Note: This service letter replaces PS43120.

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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%
0-8000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
8001-15000 hrs, 25-48 mo	33.0%	50.0%	0.0%	0.0%	50.0%	50.0%

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NOTE: This is a 124.0-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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