PRODUCT SUPPORT PROGRAM FOR REWORKING THE TILT CYLINDER ASSEMBLY ON CERTAIN 993K WHEEL LOADERS WITH TUBE/CAP WELD FRACTURES Caterpillar

PRODUCT SUPPORT PROGRAM FOR REWORKING THE TILT CYLINDER ASSEMBLY ON CERTAIN 993K WHEEL LOADERS WITH TUBE/CAP WELD FRACTURES

Usage:

REBE6815-02

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01Feb2011

(Revised 21Jul2011)

U-43

A-34

D-40

O-40

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*After Failure Only*	PRODUCT SUPPORT PROGRAM FOR REWORKING THE TILT CYLINDER ASSEMBLY ON CERTAIN 993K WHEEL LOADERS WITH TUBE/CAP WELD FRACTURES
5104		PS51981

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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 "PS51981" 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 01Feb2011 (Revised 17Feb2011) Service Letter. Changes have been made to the ICA program duration to cancel this field support plan within one (1) month, as we have just released the BEFORE & AFTER FAILURE PCA program PS43325 for complete cylinder assembly replacement on 18Jul2011.

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TERMINATION DATE

31Mar2011

PROBLEM

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The tilt cylinder group on certain 993K Wheel Loaders may develop cracks at the cylinder tube to cap weld (see illustration). These cracks could result in hydraulic fluid leaks as well as loss of implement function.

A modification can be made (use REHS5414, Special Instruction) to either of the existing configuration Tilt Cylinder Groups [Hi-Lift: 308-0835 & 308-0837 or Standard-Lift: 308-0832 & 308-0833], in order to significantly extend their life.

AFFECTED PRODUCT

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Model	Identification Number
993K	Z9K00269-00380

PARTS NEEDED

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Qty	Part Number	Description
1	1J5281	RING-WEAR
1	1U3174	SEAL-O-RING
1	3J1907	SEAL-O-RING
1	4T4143	SEAL AS
1	6V9746	SEAL-O-RING-ORFS
1	8C8762	ELBOW-SPL
1	8T3331	RING-WEAR
1	3465189	SEAL-U-CUP SPRG
1	3469381	SEAL AS-BUFFER
1	3469383	SEAL-WIPER
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 20% 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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It is suggested that the dealer re-work the failed cylinder(s) in accordance with the following rework procedure and Special Instruction REHS5414 "993K Wheel Loader Tilt Cylinder Cap Weld Rework Procedure". It is also requested that 3rd party inspection services be engaged to execute confirmation of weld repair using Non-Destructive Ultrasonic testing methods.

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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%
0-8000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
8001-12000 hrs, 25-36 mo	33.0%	50.0%	0.0%	0.0%	50.0%	50.0%
12001-20000 hrs, 37-60 mo	0.0%	0.0%	0.0%	0.0%	100.0%	100.0%

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NOTE: This is a 46.0-hour job
A Miscellaneous Cost Allowance for 3rd party weld repair inspection services for Non-Destructive Ultrasonic Testing is permissible up to a maximum of $2000 USD.

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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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The following Caterpillar Publications may be helpful, and can be located in the Caterpillar, Service Information System (SIS-Web):

KENR5832 "Tilt Cylinder ? Remove and Install"

SEBF8072 "Inspection and Salvage of Hydraulic Cylinder Components"

REHS5414 "993K Wheel Loader Tilt Cylinder Cap Rework Procedure"

1. Follow the published "Removal and Installation" guidelines in KENR5832 to remove the failed tilt cylinder from the machine and transport it to the Dealer Hydraulic Shop for modification.

2. Disassemble the cylinder in accordance with the "Disassembly" guidelines published in KENR5832.

3. Follow the "Inspection and Salvage" guidelines in SEBF8072 (-12 or later) to determine the correct disposition of the disassembled components and order new components if required.

4. Perform the "Tilt Cylinder Cap Rework Procedure" published in REHS5414 "993K Wheel Loader Tilt Cylinder Cap Weld Rework Procedure".

5. Make certain that all components are clean and free of contamination. Assemble the tilt cylinder in accordance with the "Assembly" guidelines published in KENR5832.

6. Reinstall the tilt cylinder on the machine and follow the normal commissioning processes required at the customer site.