PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE UPPER TRANSMISSION MOUNT BOLTS ON CERTAIN AD55 UNDERGROUND ARTICULATED TRUCKS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE UPPER TRANSMISSION MOUNT BOLTS ON CERTAIN AD55 UNDERGROUND ARTICULATED TRUCKS

Usage:

REBE7658-00

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25Oct2011

D-409

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE UPPER TRANSMISSION MOUNT BOLTS ON CERTAIN AD55 UNDERGROUND ARTICULATED TRUCKS
3082 7553		PI31941

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI31941" 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 "PI31941" 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 upper transmission mounting bolts need to be replaced on certain AD55 Underground Articulated Trucks. The existing upper transmission mount bolts can stretch and break.

AFFECTED PRODUCT

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Model	Identification Number
AD55	DNW00618

PARTS NEEDED

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Qty	Part Number	Description
1	2S4078	SEAL-O-RING
1	3J1907	SEAL-O-RING
4	4J0522	SEAL-O-RING
14	4J0524	SEAL-O-RING
4	4J0527	SEAL-O-RING
1	5F3106	SEAL-O-RING
4	6V3823	BOLT-HEX HEAD
8	7K4370	BOLT-LOCKING
8	8T0281	BOLT
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 41% 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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Refer to the following Disassembly & Assembly manuals:
Disassembly & Assembly, RENR8505, "AD55 Underground Articulated Truck Power Train".
Disassembly & Assembly, RENR8512, "AD55 Underground Articulated Truck Machine Systems".

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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 20.0-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 REPLACING THE UPPER TRANSMISSION MOUNT BOLTS ON CERTAIN AD55 UNDERGROUND ARTICULATED TRUCKS

MODELS INVOLVED - AD55 UNDERGROUND ARTICULATED TRUCKS

Dear Caterpillar Product Owner:

The upper transmission mounting bolts need to be replaced on the products listed below. The existing upper transmission mount bolts can stretch and break. 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 25Oct2011 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 25Oct2011 Service Letter

Rework Procedure

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Remove the transmission & output transfer gears. Refer to D & A, "Transmission & Output Transfer Gears ? Remove."

Image1.1.1

Remove the eight 7K-4370 Transmission Support Bracket Bolts and the washers. The bolts will not be reused. Refer to Image 1.1.1
Install eight new 7K-4370 bolts and the existing washers. Tighten the bolts to a torque of 215 +/- 40 Nm (160 +/- 30 lb/ft).
Install the transmission & output transfer gears. Refer to D & A, "Transmission & Output Transfer Gears ? Install".