PRODUCT SUPPORT PROGRAM FOR INSPECTING THE GENERATOR DRIVELINE ON CERTAIN 795F AC OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR INSPECTING THE GENERATOR DRIVELINE ON CERTAIN 795F AC OFF-HIGHWAY TRUCKS

Usage:

TEBE9080-00

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22Apr2019

N016
N020

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Containment - Before/After (Limited distribution)	PRODUCT SUPPORT PROGRAM FOR INSPECTING THE GENERATOR DRIVELINE ON CERTAIN 795F AC OFF-HIGHWAY TRUCKS
4456		PS90961

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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 Containment Program can be administered either before or after a failure occurs. In either case the decision whether to apply the Program is made by the dealer and service rep. Obtain the service reps Goodwill Approver Code before completing the repair. EAME dealers should use their standard Industry Group specific goodwill approval codes. The Goodwill Approver Code must be included when submitting the claim.

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NOTE:	When reporting the repair, use "PS90961" as the Part Number and "7777" as the Group Number. If administered before failure, use "56" as Warranty Claim Description and "T" as the SIMS Description Code. If administered after failure, use "96" as Warranty Claim Description Code and use "Z" as the SIMS Description Code.
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

30Apr2020

PROBLEM

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The sealed adapter group was recently introduced on certain 795F AC Off-Highway Trucks. If other downstream components were not inspected and replaced accordingly at that time, driveline vibration will result. Productions fixes may not have been in place for ERM00294-300 and the 1S-7408 o-ring may have been installed at the factory.

AFFECTED PRODUCT

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Model	Identification Number
795F AC	ERM00153, 158, 170, 175, 178, 183, 202, 232-233, 253-254, 259, 285-287, 293-300

PARTS NEEDED

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Qty	Part Number	Description
4	8T0670	BOLT
1	8T6381	BOLT-HEX HEAD
2	9X8399	WASHER
1	1436120	PLATE (After Failure Only)
1	2550777	YOKE AS (After Failure Only)
4	3285496	MOUNT AS. (After Failure Only)
1	3429528	PLATE (After Failure Only)
2	3998027	SLEEVE-TAPERED (After Failure Only)
2	4208618	MOUNT AS (After Failure Only)
2	4228797	SUPPORT-GEN (After Failure Only)
1	4392848	RING-SEALING (After Failure Only)
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 32% 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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For Affected Product, ERM00294 through ERM00300, remove the 1S-7408 o-ring if it is present.

Refer to Special Instruction, REHS8626, "Procedure to Update the Generator on 795F AC Off-Highway Trucks".

Refer to Special Instruction, SEHS0307, "Procedure to Improve the Generator Mounting Group on the 795F AC Off-Highway Truck".

1. Check alignment of torque witness marks on the yoke retention bolt and plate to see if there is movement in the bolt.

2. Check to see if yoke appears to be loose in the radial or axial direction. Do not remove the plate or bolt for this check.

3. Remove the generator yoke.

4. Check for a wear step or damage on the generator shaft spline teeth or yoke.

5. Measure and record Runout (TIR) of the generator shaft and compare with previous readings to check for degradation.

6. Check for a wear step on the sealing ring or yoke abutment face. Replace if necessary.

7. Look for damage to the shaft threads or any abnormal wear. Clean the generator shaft threads and inspect for any damage visually and by threading a new bolt in.

8. Inspect the condition of the mounts: any material extrusion, excessive compression set, oozing, etc. Replace if necessary.

9. Install the yoke per REHS8626.

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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%
0-15000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
15001-30000 hrs, 25-60 mo	33.0%	50.0%	0.0%	0.0%	50.0%	50.0%

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NOTE: This is a 7.0-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.
Additional hours can be claimed after failure. The claim story will need to justify what was replaced and why.

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