Electrical Wire Connections Need to Be Inspected On Certain 777B Trucks 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 must be administered as soon as possible. When reporting the repair, use "PI3589" as the Part Number, "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI3589" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

Completion Date

Termination Date

Problem

The electrical wire connections under the dash may not have been tightened to the proper tightness on certain 777B Trucks.

Affected Product
Model & Identification Number

777B (4YC1684-1730)

Parts Needed

Not Applicable

Action Required

See the attached procedure.

Owner Notification

Not Applicable

Service Claim Allowances

NOTE: This is a 1-hour job.

NOTE: U.S. and Canadian Dealers only - Eligible dealers may enter a Type 2 SIMS Report.

Parts Disposition

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

NOTE: MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

Attach. (1-Rework Procedure)

Rework Procedure

1. Remove the 2G6531 Front Cover from the cab. See Illustration 1.

2. Remove the 2A0762 Bolts that secure the wiper motor to the cab. See Illustration 2.

3. Remove the 5T5025 Clip Retainer from the wiper arm at the linkage. See Illustration 2.

4. Move/Remove the wiper motor so that it is not in the way of the fuse panel.

5. Make sure that all of the wiring connections on the breakers and switch assemblies are tight.

6. Make sure that wire 109 orange and wire 139 Orange are not connected to the same terminal on the 3T8728 Breaker (20 Amp). See Illustration 4.

7. Install the wiper motor and connect the linkage. Make sure that the retainer clip is installed.

8. Make sure that all of the wiring connections at the switch assemblies, warning lights, and key switch on the lower dash are tight. Check both the right and left hand sides of the steering column.

Illustration 1

Illustration 2

Illustration 3

Illustration 4