PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE DIFFERENTIAL ON CERTAIN 789D OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE DIFFERENTIAL ON CERTAIN 789D OFF-HIGHWAY TRUCKS

Usage:

TEBE2855-00

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25Mar2015

A-89

O-108

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Priority	PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE DIFFERENTIAL ON CERTAIN 789D OFF-HIGHWAY TRUCKS
3258 3256 3281		PI32464

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NOTE:

Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.

NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI32464" as the Part Number and "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. Exception: If the repair is done after failure, use "PI32464" as the Part Number, "7751" as the Group Number, "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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COMPLETION DATE	TERMINATION DATE
30Sep2015	31Mar2016

PROBLEM

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The differential adjusting ring needs to be replaced on certain 789D Off-Highway Trucks. The existing adjusting ring may have missed a heat treat operation and could result in a differential bearing failure.

AFFECTED PRODUCT

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Model	Identification Number
789D	SPD00675-00686, 688-692

PARTS NEEDED

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Qty	Part Number	Description
1	5D6428	SEAL-O-RING (Before Failure Only)
1	5P9519	SEAL-O RING (Before Failure Only)
2	6D1355	SEAL-O RING (Before Failure Only)
1	1272936	RING-ADJUSTING (Before Failure Only)
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 45% 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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Refer to the Service Manual if/as necessary.
Remove the Transmission and differential from the rear axle as per UENR1065. Separate the differential from the transmission. Replace the 127-2936 adjusting ring on the bevel gear side of the differential carrier. Reset the differential backlash and bearing preload as per UENR1063 Differential and Bevel Gear - Adjust.

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OWNER NOTIFICATION

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Owners in the following countries will receive the attached Owner Notification:
US
Canada

SERVICE CLAIM ALLOWANCES

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Caterpillar		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
100%	100%	0%	0%	0%	0%

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NOTE: This is a 32.0-hour job

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PARTS DISPOSITION

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Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

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EXAMPLE COPY OF OWNER NOTIFICATION

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE DIFFERENTIAL ON CERTAIN 789D OFF-HIGHWAY TRUCKS

MODELS INVOLVED - 789D Off-Highway Trucks

Dear Cat Product Owner:

The differential needs to be reworked on the products listed below. The existing adjusting ring may have missed a heat treat process and can lead to differential bearing failure. You will not be charged for the service performed.

Contact your local Cat dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service.

If you are no longer the owner of this product(s), please contact your local Cat dealer so that our records can be updated. Please refer the dealer to their Service Letter dated 25Mar2015 when scheduling this service.

We regret the inconvenience this may cause you, but urge you to have this service performed as soon as possible to prevent unscheduled downtime.

Caterpillar Inc.

Identification #(s)

Attached to 25Mar2015 Service Letter