PRODUCT SUPPORT PROGRAM FOR REPLACING THE MAIN CONTROL VALVE CENTERING SPRING ON CERTAIN 824K WHEEL DOZERS, 825K SOIL COMPACTORS, AND 826K LANDFILL COMPACTORS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE MAIN CONTROL VALVE CENTERING SPRING ON CERTAIN 824K WHEEL DOZERS, 825K SOIL COMPACTORS, AND 826K LANDFILL COMPACTORS

Usage:

TEBE7810-00

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04Jul2018

U-374

A-278

D-327

O-337

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Before/After	PRODUCT SUPPORT PROGRAM FOR REPLACING THE MAIN CONTROL VALVE CENTERING SPRING ON CERTAIN 824K WHEEL DOZERS, 825K SOIL COMPACTORS, AND 826K LANDFILL COMPACTORS
5051		PS45939

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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 must be administered either before or after failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS45939" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. If administered after failure, use "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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TERMINATION DATE

31Jul2020

PROBLEM

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The existing centering springs in the main control valve may fail on certain 824K Wheel Dozers, 825K Soil Compactors, and 826K Landfill Compactors.

AFFECTED PRODUCT

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Model	Identification Number
824K	23400258, 4001-4011 RWB00100-00135
825K	23300257, 5001-5023 SEE00200-00213
826K	23200256-00257, 6001-6047, 6200-6307 SET00300-00311, 500-515

PARTS NEEDED

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Qty	Part Number	Description
1	5297729	SPRING-SPOOL
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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Refer to UENR3817, Disassembly and Assembly, 826K Landfill Compactor, 825K Soil Compactor and 824K Wheel Dozer Machine Systems, "Main Control Valve - Disassemble and Assemble".

Refer to the table in Image1 for the main control valve part numbers.

Refer to Image2 for an example of a typical main control valve cross-section.

If the existing centering spring fails, replace the failed spring with a new 529-7729 Spool Spring.

1. Access the main control valve and clean the area. Do NOT remove the main control valve from the machine.

2. Remove the cap from the main control valve.

3. Remove the directional stem from the main control valve.

NOTE: Use a clean, lint-free, towel to handle the directional stem assembly. Do NOT damage the directional stem running surfaces.

4. Disassemble the directional stem. Replace the failed broken spring with a new 529-7729 Spool Spring.

5. Assemble the directional stem assembly. Tighten to a specified torque of 8 +/- 0.5 N.m (5.9 +/- 0.4 lb. ft).

6. Clean the directional stem assembly as needed and install in the main control valve.

7. Install the end cap on the main control valve. Tighten the bolts to a specified torque of 8 +/- 0.5 N.m (5.9 +/- 0.4 lb. ft).

NOTE: Ensure proper orientation and alignment of the directional stem assembly and end cap. Refer to Image2.

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Image1

Image2

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%
6001-8000 hrs, 37-48 mo	33.0%	50.0%	0.0%	0.0%	50.0%	50.0%

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NOTE: This is a 4.0-hour job If there has been a previous repair, part age/hours will apply. Retain a copy of the previous repair invoice in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim.
Note: Up to $100 US Dollars is allowed for lost oil.

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