PUMP GP-FUEL INJ 20R6818 - Caterpillar

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.
This Program must be administered as soon as possible. When reporting the repair, use "PI3688" 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 "PI3688" 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
October 31, 1994Termination Date
April 30, 1995Problem
A strap needs to be added to the muffler bracket to prevent the muffler mounting bolts from loosening or breaking on certain D3C Series III, D4C Series III, and D5C Series III Tractors and 933 and 939 Loaders
Affected Product
Model & Identification Number
D3C Series III (6SL1-366, 7XL1-190)
D4C Series III (6YL1-289, 7SL1-130)
D5C Series III (9DL1-351, 6ZL1-167)
933 (8FL1-91, 9EL1-51 )
939 (9GL1-125)
Parts Needed
Dealers will need to order parts for this Program.
1 - 3E4352 Washer-Hard2 - 3S2093 Tie1 - 8T3612 Nut-Weld1 - 6V3940 BoltAction Required
See the attached procedure.
Owner Notification
U.S. and Canadian owners will receive the attached Owner Notification.
Service Claim Allowances
This is a 3-hour job.
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.
MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
Attach.(1-Owner Notification)(2-Rework Procedure)Copy Of Owner Notification For U.S. And Canadian Owners
Rework Procedure
1. Using mild steel, fabricate a strap and plate as shown in Illustrations 1 and 2.2. Remove engine side panels and hood.3. Install strap by removing 6V5217 Bolt used to attach dipstick to intake manifold. Use 6V5217 Bolt and 3E4352 Washer to attach strap between dipstick and intake manifold as shown in Illustration 3.4. Attach plate to strap using 6V3940 Bolt and 3E4352 Washer as shown in Illustration 3.5. Locate point to weld plate to muffler support as shown in Illustration 3. Before welding attach work lead to muffler support.
6. Route wiring harness as shown in Illustration 4.7. Check the tightness of the 3 bolts on th muffler support at the exhaust manifold. These bolts should be tightened to a torque of 21 5 lb. ft.
Fabrication of Strap Illustration 1
Fabrication of PlateIllustration 2
Location of PartsIllustration 3
Location of Wiring HarnessIllustration 4