ROTATING GP-PUMP 2835978 - Caterpillar

Caterpillar: Confidential Yellow
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 "PI3137" 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 "PI3137" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
Refer to your Warranty Bulletin for detailed information with regard to Product Improvement Programs.
Completion Date
November 30, 1998Termination Date
May 31, 1999Problem
Some 7W0053 and 4P5638 Engine Oil Pumps may have been built with a flawed drive shaft that can have excessive motion. This may cause the oil pump to wear out prematurely.
Affected Product
Model & Identification Number
Group 1
777D HA (2YW93, 2YW95)
77D (3PR626, 3PR627, 3PR629-635)
992G (7HR142, 7HR144, 7HR146)
D11R (9TR214-217
854G (1JW220)
5130B (4CS145)
Group 2
3508 (23Z7002-7014, 69Z776, 69Z777, 96Y1780, 5XM123)
3508B (6PN364-375, 2GR950-952, 2GR954, 2GR954, 962, 2GR964-)
3512 (1LM145-148, 24Z8260-8277, 49Y855, 49Y-856, 50Y1544, 50Y1545, 51Y774, 65Z893, 65Z894, 66Z744-752, 67Z1510-1519, 3MS160)
3512B (8RM251)
G3512 (7NJ358, 7NJ359, 4KC649)
G3516 (4EK1501-1516, 8LD66, 8LD67
Parts Needed
1 - 1H9696 Seal-O-Ring2 - 3P0649 Seal-O-Ring1 - 0R2561 Pump Group (for 3508 Engines, 777D, 992G, 854G, 5130B, D11R)1 - 0R3230 Pump Group (for 3512 and 3516 Engines)1 - 6V3908 Seal-O-Ring1 - 6V5101 Seal-O-Ring1 - 6V7681 Seal-O-RingAction Required
1. For D11R Tractors, 992G Wheel Loaders and 854G Wheel Tractors, lower engine protection guards will need to be removed for access to the engine oil pump.2. For 777D Trucks, 992G Wheel Loaders and the 3508B Machine Engines (2GR), the 4W6095 Bracket must be loosened for access to the sequence number.3. The oil pump sequence number is located on the rear lower right hand side of the oil pump to the left of the fuel transfer pump.4. The 3508 Engines use the 7W0053 Oil Pump. Sequence numbers between 17514-17551 should be replaced.5. The 3512 and 3516 Engines use the 4P5638 Oil Pump. Sequence numbers between 15776-15817 should be replaced.Owner Notification
U.S. and Canadian owners will receive the attached Owner Notification.
Service Claim Allowances
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)Copy Of Owner Notification For U.S. And Canadian Owners