PRODUCT SUPPORT PROGRAM FOR REWORKING HEEL MOUNTING HARDWARE ON CERTAIN 559C, 579C, 2384C, AND 2484C KNUCKLEBOOM LOADERS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REWORKING HEEL MOUNTING HARDWARE ON CERTAIN 559C, 579C, 2384C, AND 2484C KNUCKLEBOOM LOADERS

Usage:

TEBE4396-01

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09Mar2016

(Revised 11Jul2016)

U-124

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After Failure Only	PRODUCT SUPPORT PROGRAM FOR REWORKING HEEL MOUNTING HARDWARE ON CERTAIN 559C, 579C, 2384C, AND 2484C KNUCKLEBOOM LOADERS
6520 6502		PS53161

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NOTE:	Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.
NOTE:	This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS53161" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "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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NOTE:	This Revised Service Letter replaces the 09Mar2016 Service Letter. Changes have been made to the Affected Product.

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TERMINATION DATE

31Mar2018

PROBLEM

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The existing hardware can become loose on certain 559C, 579C, 2384C, and 2484C Knuckleboom loaders. If the existing mounting hardware loosens, it can cause damage to the heel and stick boom.

AFFECTED PRODUCT

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Model	Identification Number
2384C	KAW00251-00291 KB600300-00410, 412-415, 417-424
2484C	KAZ00251-00261 KB700300-00323
559C	KAS00250-00391 KB400100-00477, 480-494, 496-497, 500-516, 521-526, 528, 533-534, 537-546, 548-553, 555, 565, 567, 569-570, 572-574, 577, 579, 589
579C	KAX00250-00273 KB500101-00169, 171-175, 177

PARTS NEEDED

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Qty	Part Number	Description
4	7X2489	BOLT-HEX HEAD
10	7X2582	BOLT-HEX HEAD
10	8C8722	NUT-HEX
4	8T4001	NUT-HEX
20	1984783	WASHER-HARD
8	2673507	WASHER-HARD
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 1% 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 attached Rework Procedure.

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SERVICE CLAIM ALLOWANCES

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Product smu/age whichever comes first	Caterpillar		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
0-6000 hrs, 0-36 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 5.0-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.

Rework Procedure

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1. Follow all safety guidelines as outlined in the machines Operation and Maintenance Manual, before starting any work on the machine.

2. With the boom fully rested on the ground, remove the heel from the machine. Once removed, clean the mating surfaces of the heel and stick. These surfaces must be free of all dirt, paint, and metal burrs that may have occurred while the heel was being operated loosely.

3. Once the mating surfaces are clean, re-install the heel back onto the stick boom. Align the mounting holes and secure the heel in four locations. Tighten the hardware to maintain the heel?s position.

4. Any damaged holes through the heel and stick boom will need to be drilled out to 30mm and new hardware is to be installed. A frame drill will work best for this procedure. Once these holes have been machined, install the new hardware. Do NOT tighten this hardware to the listed specifications yet. Refer to Image1.2.1 for assembly of the new hardware.

Image1.2.1

5. Drill four additional 25mm holes, two per each side of the heel. Use the attached dimensions shown in Image1.3.1 in order to locate the position of these additional mounting locations (A). Once drilled, install the new hardware. If you have not already, remove the original hardware used to secure the heel so that those holes can be drilled to 30mm. Drill these holes to the larger size, if needed, or add the new 24mm hardware.

Image1.3.1

IMPORTANT: This step is extremely important and must be followed using the correct torque tooling. The use of an impact gun is NOT allowed for this procedure.

6. Tighten all the hardware in the steps and in the sequence shown in Image1.4.1.