LAMP GP-HEAD & SIGNAL 1950190 - Caterpillar

REBE4684-00
24Nov2008
U-597
A-494
D-509
O-548
TM-31
Priority
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REPLACING ROCKER ARM SHAFT ASSEMBLIES ON CERTAIN MARINE C32 ACERT ENGINES
1102 1123 PI31584
This Program must be administered as soon as possible.When reporting the repair, use "PI31584" as the Part Number and "7751" as the Group Number, "56" as the Warranty Claim Description Codeand "T" as the SIMS Description code. Exception: If the repair is done after failure, use "PI31584" as the Part Number, "7751" as the Group Number,"96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
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.
COMPLETION DATE
TERMINATION DATE
31May2009 30Nov2009
PROBLEM
The rocker arm shaft assemblies need to be inspected on certain Marine C32 ACERT engines. The rocker arm shafts may contain residual debris from manufacturing which can lead to sticking of the rocker arms to the rocker arm shaft.
This Program is a direct replacement for the cancelled PI31568. If this work was performed under PI31568 enter note in SIMS entry stating work was performed under PI31568 and work under this program is not required.
AFFECTED PRODUCT
Model Identification Number
C32 RNX00101
RNY00100-00101
T3T00101-00165, 167-168, 170-173, 175-177, 179-181, 183-187, 189, 193-195, 204-209
PARTS NEEDED
Qty
Part Number Description
4 5J5794 BOLT-12 POINT HD
4 6I1458 BRIDGE-VALVE
4 8L2777 SEAL-O-RING
2 0618639 SEAL-O-RING
2 1924151 BUTTON
2 1965069 SCREW-ROCKER ARM
2 1965070 NUT - JAM
4 2588721 BUTTON
4 2744491 SCREW-ROCKER ARM
4 2765317 NUT-FUL (SPL)
2 2781363 ARM AS-UI RKR
1 3134085 SHAFT AS-RKR ARM
2 3202795 ARM AS-V ROCKER
2 3202797 ARM AS-V ROCKER
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 40% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
ACTION REQUIRED
If this work was performed under PI31568, no further action is required.
Remove the rocker arm shaft assemblies from the engine and disassemble them. Refer to the Disassembly & Assembly manual of the engine being inspected for removal and installation procedures for the valve mechanism cover, rocker arm shaft assembly, and rocker arm. Check the assembly for freedom of movement between the rocker arms and shaft. Visually inspect all parts for evidence of material transfer or scuffing between the rocker arm and shaft. Refer to Image1 for a photo of scuffing of a rocker arm, and Image2 for scuffing and material transfer of a rocker arm shaft.
Inspect the bolts for any damage to the threads or the underside of the bolt head. If damage is seen, replace the bolts. Lubricate the bolt heads prior to assembly.
If the rocker arms and shafts have no evidence of material transfer or scuffing damage, reassemble the rocker arm shaft assemblies and install them back in the engine. If there is evidence of damage on any of the parts, replace the entire rocker arm shaft assembly using the parts list below. Refer to the Disassembly & Assembly manual for proper procedures. Set valve lash for the inlet and exhaust valves and adjust the electronic unit injectors, per the Testing & Adjusting manual.
Image1
Image2
OWNER NOTIFICATION
U.S.