CYLINDER GP-HYDRAULIC 3683244 - Caterpillar

SEBE7949-01 March 23, 2002
(Revised May, 2002)
U-66
AU-42
S-42
H-42
O-54
TT-2
TM-3
beforeor
afterfailure PRODUCTSUPPORT PROGRAM FOR RESETTING VALVE LASH ON CERTAIN C-10 AND C-12 ENGINESIN ON-HIGHWAY TRUCK AND COMMERCIAL APPLICATIONS, AND IN CERTAIN 3196 MARINEENGINES
1105 PS40914
This Program can be administeredeither before or after failure. In either case the decision whether toapply the Program is made by the dealer. When reporting the repair, use"PS40914" as the Part number and "7755" as the Group Number. If administeredbefore failure, use "56" as the Warranty Claim Description Code and use"T" as the SIMS Description Code. If administered after failure, use "96"as the Warranty Claim Description Code and use "Z" as the SIMS DescriptionCode. The information supplied in thisservice letter may not be valid after the termination date of this program.Do not perform the work outlined in this Service Letter after the terminationdate without first contacting your Caterpillar product analyst. This Revised Service Letter replacesthe March 23, 2002 Service Letter. Changes have been made to the Mail Codesto add TM-3.
TERMINATION DATE
March 31, 2003PROBLEM
Engines within the specified ranges mayhave mis-adjusted valve lash settings and/or low torque on the valve lashadjusting screw jam nut. This program is to cover resetting the valve lashon those engines as soon as possible to avoid possible engine damage.AFFECTED PRODUCT
The serial number ranges listedbelow reflect the entire range of engines suspect for this problem. However,a significant number of these engines were inspected and/or reset eitherat Caterpillar or the OEM factory. Those engines were marked with the letters"YD" stamped near the serial number plate on the cylinder block. Enginesalready marked "YD" are not affected by this Service Letter.
Model IdentificationNumber
C-10Truck 3CS24644-24790
C-12Truck 2KS77195-776329SM2294-23709NS20382-20396
C-10Industrial BCX483-511
C-12Industrial BDL627-703
3196Marine 2XR4639-4661PARTS NEEDED
No parts needed Valve cover seals should reused.ACTION REQUIRED
See the attached Rework Procedure.SERVICE CLAIM ALLOWANCESFor Truck Engine applications, claimas follows: Code 1105-025, Inlet / Exhaust Valve(s) Adjust. Allowable timesper chassis are as follows:
SC MC CV CO
2.4 1.9 1.7 1.9For all other applications, claim asfollows:
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts Labor Hrs Parts Labor Hrs Parts Labor Hrs
0-400000-12 mos 100% 2 0 0 0 0
This is a 2.0?hr job.PARTS DISPOSITION
Handle the parts in accordance with yourWarranty Bulletin on warranty parts handling.Attach. (1-Rework Procedure)Rework Procedure
Inspect the serial number plate area onthe cylinder block (right rear corner of block) to determine if the letters"YD" are stamped on the block. If stamped "YD", then the engine has alreadybeen reworked and no further action is necessary. If there is no "YD" stamp,proceed with the rework procedure.
Visually inspect the valve rocker armsto see if there are any loose or missing adjusting screw jam nuts. If anynuts are missing, locate and retrieve the missing nut(s). Do not reuseany nuts that may have backed off; replace as necessary.
Depending on the miles/hours on the engine,identify the extent of service required as follows:
For affected engines with LESSthan 10,000 miles / 16,000 km / 300 hours, only valve lash adjustmentis required. For these low hour engines, the normal complete overheadadjustment maintenance must still be performed on schedule as specifiedin the Engine Operation and Maintenance Manual.For engines over 10,000 miles /16,000 km / 300 hours, the normal COMPLETE overhead adjustment (includingvalves, injectors, and Jake Brake) should be performed under thisPSP. In this case, this initial adjustment will sufficefor the normal