PRODUCT IMPROVEMENT PROGRAM FOR ADDING A WELD TO THE MUFFLER STACK FOR VENTURI ON 24M MOTOR GRADERS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR ADDING A WELD TO THE MUFFLER STACK FOR VENTURI ON 24M MOTOR GRADERS

Usage:

REBE7950-00

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24Jan2012

U-45

A-38

D-42

O-45

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR ADDING A WELD TO THE MUFFLER STACK FOR VENTURI ON 24M MOTOR GRADERS
7263 1062 7251 0679		PI31982

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI31982" 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 "PI31982" 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
31Jul2012	31Jan2013

PROBLEM

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A weld needs to be added to some muffler stacks on certain 24M Motor Graders. If the weld is not added, there is a potential for the muffler Venturi cone to fall into the muffler causing back pressure and performance problems.

AFFECTED PRODUCT

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Model	Identification Number
24M	B9K00450-00524, 526-528

PARTS NEEDED

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No parts needed for this program

ACTION REQUIRED

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Refer to Special Instruction REHS7143 "Installation of the Venturi Stack for the 24M Motor Graders" for details on how to add the Weld to the Muffler Stack for the 24M.

NOTE: Ensure engine is cooled before touching a hot muffler stack
1. Open enclosure door, reach up into the muffler stack and feel for a weld. If a weld is present, it will be between the muffler stack inside wall and the muffler venturi cone as seen in the illustration below. No other work is needed.
2. If a weld is not felt, remove exhaust stack on the engine enclosure and ensure the weld is not present. Add a weld as descrbed in REHS7143 headings "Weld Specifications and Qualifications" and "Remove the Existing Exhaust" (Steps 1-8).

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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 0.5-hour job
This is a 0.5 hour job to check for the weld. 0.5 hour additional is allowed to add a missing weld per REHS7143

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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 A WELD TO THE MUFFLER STACK FOR VENTURI ON 24M MOTOR GRADERS

MODELS INVOLVED - 24M

Dear Caterpillar Product Owner:

The Muffler Stack needs to be welded on the products listed below. The existing Muffler has a Venturi cone inside of it that may become loose. 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 10Jul2011 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.

Please refer the dealer to their Service Letter dated 24Jan2012 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 24Jan2012 Service Letter