PUMP GP-WATER 1664378 - 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 can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS5416" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.
Termination Date
February 28, 1999Problem
Certain 3508B, 3512B and 3516B Engines may experience a failure of 1011180 Outer Valve Spring. The spring can fail prior to scheduled top end or engine overhaul due to an improper manufacturing process of the supplier.
Affected Product
Model & Identification Number
3508B (2BM115, 2BM116 4GM146-152 , 4GM160-166 7SM44-52 6PN203-221 , 6PN237-240 2GR221-266 , 2GR301-348)
3512B (7HM168-171 4TN67-71 , 4TN73-78 6WN102 , 6WN103, 6WN109 8RM142-162 , 8RM166-170 8BR512 , 8BR513)
3516B (7RN326-398, 7RN420-425 7TR215 6HN113-118 , 6HN123-128 9AN107-109 8KN92-94 )
Parts Needed
3508B Engines
32 - 1011180 Spring-Valve3512B and 3516B Engines
64 - 1011180 Spring-ValveAction Required
Replace the outer valve springs with new valve springs of the same part number, 1011180.
Service Claim Allowances
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.