PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REPLACING ROCKER ARM SHAFT ASSEMBLIES ON CERTAIN MARINE C32 ACERT ENGINES Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REPLACING ROCKER ARM SHAFT ASSEMBLIES ON CERTAIN MARINE C32 ACERT ENGINES

Usage:

REBE4684-00

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24Nov2008

U-597

A-494

D-509

O-548

TM-31

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REPLACING ROCKER ARM SHAFT ASSEMBLIES ON CERTAIN MARINE C32 ACERT ENGINES
1102 1123		PI31584

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NOTE:

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 Code and "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.

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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.

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COMPLETION DATE	TERMINATION DATE
31May2009	30Nov2009

PROBLEM

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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.

NOTE: 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

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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

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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

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NOTE: 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.

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Image1

Image2

OWNER NOTIFICATION

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U.S. and Canadian owners will receive the attached Owner Notification.

SERVICE CLAIM ALLOWANCES

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Caterpillar		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
100%	100%	0%	0%	0%	0%

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NOTE: This is a 4.0-hour job
NOTE: 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.

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PARTS DISPOSITION

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Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

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COPY OF OWNER NOTIFICATION FOR U.S. AND CANADIAN OWNERS

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REPLACING ROCKER ARMS AND ROCKER ARM SHAFTS ON CERTAIN MARINE C32 ACERT ENGINES

MODELS INVOLVED - C32 ACERT Marine Engines

Dear Caterpillar Product Owner:

The rocker arm shaft assemblies need to be inspected on the products listed below. The existing rocker arm shaft may contain manufacturing debris from the supplier, which could cause the rocker arms to stick or seize to the rocker arm shaft. You will not be charged for the service performed.

Contact your local Caterpillar dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service.

Please refer the dealer to their Service Letter dated 24Nov2008 when scheduling this service.

We regret the inconvenience this may cause you, but urge you to have this service performed as soon as possible to prevent unscheduled downtime.

Caterpillar Inc.

Identification #(s)

Attached to 24Nov2008 Service Letter