Product Support Program For Repairing Cracks That May Develop In The Upper Compensating Cylinder Mounting Brackets At The Rear Of The Boom On Certain TH82 Telehandlers Caterpillar

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.

NOTE: This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4042" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.

Termination Date

Problem

Cracks may develop in the upper compensating cylinder mounting brackets at the rear of the boom in certain TH82 Telehandlers. These cracks may appear on either the front or rear of the mounting bracket and need to be repaired.

Affected Product
Model & Identification Number

TH82 (3KN1-434 3JN1-549 )

Parts Needed

1 - 1473212 Plate - Right Hand

1 - 1473213 Plate - Left Hand

Action Required

1. Inspect the compensating cylinder mounting brackets for any cracks.

2. Repair and add ram brackets per attached Rework Procedure.

Service Claim Allowances

NOTE: This is a 2-hour job.

Parts Disposition

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

Attach.

(1-Rework Procedure)

Rework Procedure

1. Inspect for cracks in channel section (1) as shown in Illustration 1.

2. Grind a groove in the cracked area, as shown in Illustration 1, Detail B. Dimension 3 is 60 degrees.

3. The area around the radius in channel sides must be ground smooth.

NOTE: Ensure the area prepared for welding is free of all contaminants (i.e. dirt, dust, oil, paint and grease) before welding.

4. Weld the above repared area using either manual or MIG welding.

Manual Metallic Arc Welding:

MIG Welding Wire:

5. The welded area should be ground flush with the mating surfaces.

Illustration 1

6. Position details as shown.

7. Weld as described in Step 4.

Illustration 2