PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE ELECTRIC RETARDING GRID FAN ASSEMBLY ON CERTAIN HIGH ALTITUDE 795F AC OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE ELECTRIC RETARDING GRID FAN ASSEMBLY ON CERTAIN HIGH ALTITUDE 795F AC OFF-HIGHWAY TRUCKS

Usage:

REBE8938-00

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03Oct2012

A-410

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE ELECTRIC RETARDING GRID FAN ASSEMBLY ON CERTAIN HIGH ALTITUDE 795F AC OFF-HIGHWAY TRUCKS
425R 3121 3120 1356		PI32102

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI32102" 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 "PI32102" 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
30Apr2013	31Oct2013

PROBLEM

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The electric retarding grid fan assembly needs to be replaced on certain High Altitude 795F AC Off-Highway Trucks. The existing retarding grid fan blades may have a high concentration of porosity that can cause the fan blade to break during operation.

AFFECTED PRODUCT

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Model	Identification Number
795F AC	ERM00163-00164, 168-169, 205, 264

PARTS NEEDED

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Qty	Part Number	Description
1	FAN	FAN ASSEMBLY
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 45% 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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The necessary replacement parts and guide pins for this repair will be shipped directly to the dealer. Contact John Pouwels (Pouwels_John_M@Cat.com) for parts or technical questions.

Remove and replace the fan assembly from the electric retarding grid. 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 8.0-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 ELECTRIC RETARDING GRID FAN ASSEMBLY ON CERTAIN HIGH ALTITUDE 795F AC OFF-HIGHWAY TRUCKS

MODELS INVOLVED - 795F AC

Dear Caterpillar Product Owner:

The electric retarding grid fan assembly needs to be replaced on certain High Altitude 795F AC Off-Highway Trucks. The existing retarding grid fan blades may have a high concentration of porosity that can cause the fan blade to break during operation. 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 03Oct2012 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 03Oct2012 Service Letter

Rework Procedure

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1. Remove the electric retarding grid from the machine.

2. Follow the disassembly procedure until you have removed all four Grid Elements and have full access to the Grid Fan. (Image1.1.1)

Refer to KENR8727, Disassembly and Assembly.

Image1.1.1

3. Remove the bolts and the retaining plate from the top of the fan assembly. (Image1.2.1)

Image1.2.1

4. Install the three guide pins into the holes as shown below. (Image1.3.1)

Image1.3.1

5. Use fabric lifting straps, that are rated to a minimum of 500 lbs, to lift the fan assembly off of the motor. Make certain that the fan is kept level and square to the rotor as to not make contact with the sides of the rotor coils. (Image1.4.1)

Image1.4.1

6. Clean the stator assembly with compressed air. (Image1.5.1)

Image1.5.1

7. Clean the top of the fan mounting surface with a soft cloth. (Image1.6.1)

Image1.6.1

8. Clean the top and bottom of the mounting surface of the new fan assembly. (Image1.7.1 and Image1.7.2)

Image1.7.1

Image1.7.2

9. Carefully lower the new fan assembly over the guide pins and onto the stator. Make certain that the fan is kept level and square to the rotor as to not make contact with the sides of the rotor coils. (Image1.8.1)