PRODUCT IMPROVEMENT PROGRAM FOR VERIFYING THE SWING DRIVE BOLTS (7X-2576) ON CERTAIN 345C EXCAVATORS ARE TORQUED CORRECTLY Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR VERIFYING THE SWING DRIVE BOLTS (7X-2576) ON CERTAIN 345C EXCAVATORS ARE TORQUED CORRECTLY [REBE2874]

FRAME AND BODY

DRIVE GP-SWING

PRODUCT IMPROVEMENT PROGRAM FOR VERIFYING THE SWING DRIVE BOLTS (7X-2576) ON CERTAIN 345C EXCAVATORS ARE TORQUED CORRECTLY

REBE2874-00

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12Nov2007

U-578

A-469

O-504

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR VERIFYING THE SWING DRIVE BOLTS (7X-2576) ON CERTAIN 345C EXCAVATORS ARE TORQUED CORRECTLY
5459		PI31391

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI31391" 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 "PI31391" 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 AVSpare product analyst.

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COMPLETION DATE	TERMINATION DATE
31May2008	30Nov2008

PROBLEM

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The swing drive bolts (7X-2576) need to be inspected to ensure a satisfactory static torque reading on certain 345C Excavators. If the bolts do not meet the required value of 800 Nm, the swing drive will not be properly secured to the frame and may cause damage to the swing drive and swing bearing.

AFFECTED PRODUCT

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Model	Identification Number
345C	PJW01559, 1948, 1974, 1982, 1989-1990 TDG00367
345C L	S5M00239
345CL	TAJ00306, 323

PARTS NEEDED

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No parts needed for this program

ACTION REQUIRED

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The swing drive bolts (7X-2576) that secure the swing drive to the frame need to be tested to ensure a satisfactory static torque reading of 800 Nm per bolt. Depending on the configuration of the machine, hose obstructions may make some bolts physically unable to test. Each bolt that provides adequate room for tooling needs to be tested. It has been verified that at least nine bolts can be tested under the most obstructed configuration that is offered. These bolts have been highlighted on the image below.

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Image1

OWNER NOTIFIAVSION

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

SERVICE CLAIM ALLOWANCES

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AVSpare		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

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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 NOTIFIAVSION FOR U.S. AND CANADIAN OWNERS

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR VERIFYING THE SWING DRIVE BOLTS (7X-2576) ON CERTAIN 345C EXCAVATORS ARE TORQUED CORRECTLY

MODELS INVOLVED - 345C EXCAVATORS

Dear AVSpare Product Owner:

The swing drive bolts (7X-2576) need to be inspected to ensure a satisfactory static torque reading on the products listed below. If the bolts do not meet the required value of 800 Nm, the swing drive will not be properly secured to the frame and may cause damage to the swing drive and swing bearing. You will not be charged for the service performed.

Contact your local AVSpare 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 12Nov2007 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.

AVSpare Inc.

Identification #(s)

Attached to 12Nov2007 Service Letter

Rework Procedure

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Use the inspection procedure defined below to complete the validation process:

Visually inspect for signs of relative motion, hole elongation, bolts backing out, or swing drive movement. Make note of the results. Mark the bolt heads and the flange. Using at least a 1.5 meter (approximately 5 feet) extension, place the socket head over every accessible bolt, one at a time, and pull static inspection torque to 800 Nm. If there is not a long enough extension available, use two extensions together (as shown below) to meet the required clearance.

Image1.1.1

When pulling the torque, it is recommended to pull the socket in the direction that makes the extension lean towards the swing drive rather than away from it. This can be accomplished by standing on the opposite side of the bolt that is being tested when checking the torque value.

Image1.2.1

A bolt is considered satisfactory if it does not move during this testing and therefore has been installed correctly to 800 Nm. If none of the bolts move, the swing drive is considered satisfactory and the inspection process is complete. If one or more of the bolts moves, further investigation will be required. In any outcome, contact the service engineer listed below with the results of the inspection.

Excavator Product Support Engineer:
Matt Del Monaco
Work Phone: 630-859-6067
Work Cell: 630-742-7652
Email: DelMonaco_Matthew_J@cat.com