PRODUCT IMPROVEMENT PROGRAM FOR TIGHTENING FINAL DRIVE BOLTS ON CERTAIN D6N AND D6T TRACK-TYPE TRACTORS AND PL61 PIPELAYERS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR TIGHTENING FINAL DRIVE BOLTS ON CERTAIN D6N AND D6T TRACK-TYPE TRACTORS AND PL61 PIPELAYERS

Usage:

REBE7634-00

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14Oct2011

U-440

A-362

D-391

O-389

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR TIGHTENING FINAL DRIVE BOLTS ON CERTAIN D6N AND D6T TRACK-TYPE TRACTORS AND PL61 PIPELAYERS
4050		PI31932

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI31932" 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 "PI31932" 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
30Apr2012	31Oct2012

PROBLEM

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The torque on the Planetary Gear bolts needs to be inspected on certain D6N and D6T Track-Type Tractors and PL61 Pipelayers. The bolts need to be tightened if found below specification. If the bolts are below specification severe damage to the final drive can occur.

AFFECTED PRODUCT

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Model	Identification Number
D6N LGP	GHS00998-01014, 1017-1019, 1021, 1024-1025, 1029, 1031, 1033, 1037, 1041-1043, 1054
D6N XL	MLW00542-00543, 545-547, 550-555, 557-558
D6T	PEZ00687-00691
D6T LGP	LKJ00632-00635
D6T P LGP	JWD00324-00329, 331-332
D6T P XL	ZEB00215-00218
D6T XL	LAE00566-00574
D6T XW	LBD00205-00208
PL61	WGS00188-00191

PARTS NEEDED

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No parts needed for this program

ACTION REQUIRED

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Adjust torque wrench to 200 Nm. Check the 3 external bolts on the final drive. If they move, adjust the torque wrench to 240 Nm and re-tighten.

NOTE: The factory torque specification for the bolts is 240 +/- 40 Nm. It is important to check them at minimum torque.

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Image1

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 1.0-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 TIGHTENING FINAL DRIVE BOLTS ON CERTAIN D6N AND D6T TRACK-TYPE TRACTORS AND PL61 PIPELAYERS

MODELS INVOLVED - D6N and D6T Track-Type Tractors and PL61 Pipelayers

Dear Caterpillar Product Owner:

The planetary gear bolts need to be inspected and tightened to the correct torque if found below specification on the products listed below. If the bolts are below specification severe damage to the final drive can occur.

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 14Oct2011 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 14Oct2011 Service Letter