PRODUCT SUPPORT PROGRAM FOR REPLACING THE ENGINE DAMPER MOUNTING BOLTS ON CERTAIN 797F OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE ENGINE DAMPER MOUNTING BOLTS ON CERTAIN 797F OFF-HIGHWAY TRUCKS

Usage:

TEBE0596-02

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01Nov2013

(Revised 16Oct2014)

U-536

A-371

D-444

O-448

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*After Failure Only*	PRODUCT SUPPORT PROGRAM FOR REPLACING THE ENGINE DAMPER MOUNTING BOLTS ON CERTAIN 797F OFF-HIGHWAY TRUCKS
7553 1205		PS52552

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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 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 "PS52552" 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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NOTE:	This Revised Service Letter replaces the 01Nov2013 (Revised 11Nov2013) Service Letter. Changes have been made to the Problem, Affected Product, Parts Required, and Rework Procedure.

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TERMINATION DATE

30Nov2015

PROBLEM

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The existing damper mounting bolts can fail on certain 797F Off-Highway Trucks. The damper mounting bolts typically fail in the counterbore locations of the 360-1190 Spacer Plate. If the existing engine damper mounting bolts fail it can cause unplanned downtime.

AFFECTED PRODUCT

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Model	Identification Number
797F	LAJ00141-00499
797F XQ	WSP00100-00125

PARTS NEEDED

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Qty	Part Number	Description
16	1485379	SPACER
1	1761378	SEAL-O-RING
4	2747709	BOLT
1	3373140	SEAL
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 you experience a damper bolt failure, perform the attached Rework Procedure.

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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%
0-30000 hrs, 0-60 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

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PARTS DISPOSITION

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

Rework Procedure

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1.) Remove the Vibration Damper Guard assembly.

Image1.1.1

2.) Support the damper with an approved lifting device prior to removing the damper mounting bolts. Reference KENR8384 for the correct procedure to remove the engine damper. Two 323-4712 Guide Bolts can be used 180 degrees apart to support the damper during rework.

Note: The vibration damper is fed with engine oil. Some engine oil will leak from the damper to crankshaft connection once the bolts are loosened.

Image1.2.1

3.) Remove and replace failed damper mounting bolts, along with the remaining bolts in the counterbore locations on the 360-1190 Spacer Plate. The remaining bolts not in the counter-bore locations are to be reused if the bolts meet general reuse and salvage guidelines.

Refer to Reuse and Salvage Guidelines, SEBF8301, "Inspection and Reuse of Critical Fasteners Used in All Engines" for bolt specifications.

Image1.3.1

4.) Remove the 360-1190 Spacer Plate and discard.

Image1.4.1

5.) Lubricate the bolt threads and the bottom of the bolt head with a Molysulfide based lubricant. Install 148-5379 Spacers on each 274-7709 Damper Bolt. Install bolts into damper.

Image1.5.1

6.) Starting at the 12 o'clock position and working clockwise, label the bolts from 1 through 16. Tighten damper bolts 1 through 16 in the following order to a value of 800 +/- 100 Nm, which is standard torque.
Tightening Sequence: 1-9-5-13-2-10-3-11-4-12-6-14-7-15-8-16