PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REWORKING THE REAR SUSPENSION CYLINDER GROUP BEARINGS ON CERTAIN 770G AND 772G OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REWORKING THE REAR SUSPENSION CYLINDER GROUP BEARINGS ON CERTAIN 770G AND 772G OFF-HIGHWAY TRUCKS

Usage:

TEBE6733-00

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29Sep2017

U-513

D-423

O-427

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Before/After	PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REWORKING THE REAR SUSPENSION CYLINDER GROUP BEARINGS ON CERTAIN 770G AND 772G OFF-HIGHWAY TRUCKS
7213 7200 7201		PS45617

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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 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 "PS45617" 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

30Sep2019

PROBLEM

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The existing rear suspension cylinder group bearings may seize on certain 770G and 772G Off-Highway Trucks. If the existing bearings seize, it can prevent normal strut operation.

AFFECTED PRODUCT

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Model	Identification Number
770G	ECM00326-00338, 340-354 KDH00364-00383
772G	KEX00258-00304 LTS00402-00421
772G OEM	RME00100

PARTS NEEDED

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Qty	Part Number	Description
2	3424640	BEARING-ALIGNING (After Failure Only)
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 15% 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 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%
0-8000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 1.0-hour job
Note: If the inspection reveals a non-conforming bearing an additional 6.0 hrs of labor per suspension group and up to two bearings per suspension group can be charged to this Service Letter program. Note: Bearing pictures must be submitted with claim and SIMS entry.

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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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Note: Ensure that all safety information, warnings, and instructions are read and understood before any operation or any maintenance procedures are performed. Refer to the Operation and Maintenance Manual "Safety Section".

Refer to the Service Manual if/as necessary.

You may have a rear suspension group bearing or bearings (up to four) missing the lubrication groove. A test has been devised to determine if the bearings are missing the lubrication groove without removing the suspension groups.

Refer to Images1.1.1 and 1.1.2.

Image1.1.1

Image1.1.2

1. If your truck has autolube, remove the auto lube lines from the upper and lower pins on both suspension groups. Attach a grease zerk to the pins if needed. A manual grease gun is required to perform the test. Refer to Image1.2.1.

Image1.2.1

2. Attach a grease gun to each pin and pump grease in 4-5 times. Refer to Image1.3.1.

Image1.3.1

- A good bearing will be easier to grease. There may be a slight amount of grease buildup found at the other end of the bearing as seen in Image1.4.1 below:

Image1.4.1

- A bad bearing will exhibit some resistance while pumping grease. There should be a noticeable buildup of grease at the opposite end of the bearing as seen in Image1.5.1. below: