PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE STUDS OF THE DAMPER GROUP ON CERTAIN C32 MARINE ENGINES Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE STUDS OF THE DAMPER GROUP ON CERTAIN C32 MARINE ENGINES

Usage:

REBE6075-00

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28Apr2010

U-148

D-130

O-136

TM-11

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE STUDS OF THE DAMPER GROUP ON CERTAIN C32 MARINE ENGINES
1205		PI31738

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI31738" 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 "PI31738" 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
31Oct2010	30Apr2011

PROBLEM

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The existing studs used in the damper group may have been tightened improperly on certain C32 marine engines. Improper tightening can result in a premature failure of the studs.

AFFECTED PRODUCT

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Model	Identification Number
C32	RNY00679, 681, 686-687, 698, 728, 739 RNZ00297

PARTS NEEDED

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Qty	Part Number	Description
12	1F7958	NUT-FULL
12	3D0471	STUD-TAPERLOCK
1	4C4200	PAINT-YELLOW (As Required)
1	1402576	PAINT-WHITE (As Required)
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 35% 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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Replace the existing studs and nuts with new 3D0471 Studs and new 1F7958 Nuts.

Refer to the attached Rework Procedure.

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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 1.5-hour job

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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 REPLACING THE STUDS OF THE DAMPER GROUP

MODELS INVOLVED - C32 Marine Engines

Dear Caterpillar Product Owner:

The studs in the damper group need to be replaced on the products listed below. The existing studs may have been torqued incorrectly. 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 28Apr2010 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 28Apr2010 Service Letter

Rework Procedure

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1. If a damper guard is installed, remove all bolts/washers/spacers. Place all hardware inside the guard and retain for reuse. The guard will be reinstalled with same hardware after rework is complete.

2. Remove 10 of the nuts from the damper group adapter, leaving two nuts installed that are directly across from each other to hold the damper assembly in place. Use the 8S-1378 stud remover and resetter kit or equivalent to remove these 10 studs.

NOTE: The end of each previously installed stud will be painted the color of engine. This will assist in knowing which studs have been replaced with new ones.

3. Install two new 3D0471 Studs directly across from each other. Hand start each stud and then tighten the stud to a torque of 65Nm. Use the 8S-1378 stud remover and resetter kit or equivalent to achieve proper torque. Install two new 1F7958 Nuts on studs. Hand start each nut and then tighten the nut to a torque of 120Nm.

4. Remove remaining two studs with painted ends using the 8S-1373 stud removal tool.

5. Install the remaining 10 new 3D0471 Studs. Hand start each stud and then tighten the stud to a torque of 65Nm. Install new 1F7958 Nuts on studs. Hand start each nut and then tighten to a torque of 120Nm, following the tightening sequence shown in Image1.1.1. Do not tighten nuts using a circular pattern.

Image1.1.1

6. Perform a redundant torque check on all nuts, confirming that each nut has been tightened to a torque of 120Nm. A circular torque pattern may be used for performing the redundant torque check.

7. Paint damper group as needed.

8. Install damper guard (if equipped), using same hardware that was removed in Step 1.