PRODUCT SUPPORT PROGRAM FOR REPLACING 179-6863 INNER DUO-CONE SEALS ON CERTAIN 793D OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING 179-6863 INNER DUO-CONE SEALS ON CERTAIN 793D OFF-HIGHWAY TRUCKS

Usage:

REBE4239-00

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22Aug2008

H160
E480
H070
E357
H169

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Before/After (Limited distribution)	PRODUCT SUPPORT PROGRAM FOR REPLACING 179-6863 INNER DUO-CONE SEALS ON CERTAIN 793D OFF-HIGHWAY TRUCKS
4006		PS42776

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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 "PS42776" 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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TERMINATION DATE

31Aug2010

PROBLEM

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On certain 793D Off-Highway Trucks, the existing 179-6863 Front Inner and Rear Inner Duo-Cone Seal Groups, may develop a leak due to compressions set of the existing 145-6043 rubber Toric Rings. In these applications if a Inner Duo-Cone Seal Group develops a leak, there will typically be a transfer of brake cooling oil into the wheel bearing oil, causing a reduction of the wheel bearing oil viscosity. If the leak is severe and or over time, a measurable loss of brake cooling oil along with an over-full condition of wheel bearing oil may also be observed.

AFFECTED PRODUCT

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Model	Identification Number
793D	FDB00109, 120, 144-145, 178, 183, 208, 232-234, 272, 304, 311-313, 372, 379-382, 394-399, 402, 404-405, 409, 415-418, 421-422, 449, 461-462, 469-472, 484-488, 497-506, 514-518, 524-527, 534-538, 546, 556, 559, 561, 563, 565, 580, 582-583, 585, 587, 589, 591, 593, 613, 618, 623, 629, 640, 645, 649, 653, 657, 659, 661, 663, 671-679, 685, 731-733

PARTS NEEDED

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Qty	Part Number	Description
4	2979546	SEAL GP-DUO CONE
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 9% 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 a 179-6863 Inner Duo-Cone Seal Group develops a leak, replace it with a 297-9546 Duo-Cone Seal Group. Refer to the machine Disassembly and Assembly Manual for specific instructions.

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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%
0-13000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 116.0-hour job
NOTE: 116 hours total maximum labor for 2 front and 2 rear inner seals only will be allowed per claim. NOTE: Only one claim for a total of 2 front inner Duo-Cone Seals and 2 rear inner Duo-Cone Seals will be allowed per machine serial number. NOTE: Designate in the "Additional Comments" section of the claim whether it is a left inner front, right inner front, left inner rear, or right inner rear failure. NOTE: SMU/age ranges shown are parts hours not machine hours. NOTE: If there has been a previous repair, part age 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. NOTE: This Service Letter only covers Duo-Cone Seals that have failed as a result of compression setting of the Toric. Duo-Cone Seal failures for other causes or as a result of other related component failures are not allowed under this Service Letter. NOTE: Duo-Cone Seal Groups replaced at Planned Component Replacement (PCR) intervals are not allowed under this Service Letter

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