PSP FOR INSTALLING NEW VALVE LOCKS ON CERTAIN D8L TRACTORS AND 631E SCRAPERS - PS4614 - MAILED US AND CANADA, COSA, LIMITED CFE L
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PSP FOR INSTALLING NEW VALVE LOCKS ON CERTAIN D8L TRACTORS AND 631E SCRAPERS - PS4614 - MAILED US AND CANADA, COSA, LIMITED CFE L
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.
April 24, 1991 (Effective February 1, 1991) U-81 E-50.1 O-60 PRODUCT SUPPORT PROGRAM FOR INSTALLING NEW VALVE LOCKS ON CERTAIN D8L TRACTORS AND 631E SCRAPERS 1109 PS4614 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 "PS4614" as Part Number, "7755" as Group Number, and "96" as Description Code.
Termination Date
April 30, 1992
Problem
The shoulders of the valve locks (keepers) may wear prematurely on certain D8L Tractors and 631E Scrapers.
Affected Product
Model Identification Number D8L 7YB1067-1572, 1578-1582 631E 1NB700-736, 738-777
Parts Needed
64 - 2A4429 Valve Lock
Action Required
***** Before Failure ***** Replace the existing valve locks with new 2A4429 Valve Locks from parts stock. This repair can be performed without removing the cylinder heads from the engine or the engine from the chassis. Several tools will be needed: 7F4292 Valve Spring Compressor Group, and taking a 7W2315 Injector Retainer in which an air-hose-quick-change fitting be attached (brazed/threaded to retainer). By positioning piston to top dead center and removing injector/pressurizing cylinder, you insure the valves will not drop into cylinder. By using the compressor group, you can compress springs to remove/install keepers. Or, a four-valve spring compressor (1U9347 Compressor Group) can be used to compress all four valve springs per cylinder at one time. Regardless of which compressor group is used, piston location relative to TDC should be verified with a small rod down the injector hole prior to removal of the valve locks. ***** After Failure ***** Repair the engine.
Service Claim Allowances
Product Caterpillar Dealer Suggested Customer Suggested smu/age Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. whichever (D/N) (Cost) (C/L) (Sell) comes first ***** Before Failure ***** 0-5000 100% 8 0 0 0 0 0-24 mo NOTE: This is an 8-hour job. ***** After Failure ***** 0-5000 100% 40 0 0 0 0 0-24 mo NOTE: This is an 40-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Caterpillar Information System:
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