PRODUCT SUPPORT PROGRAM FOR REPLACING THE 158-9956 CHECK VALVE IN THE FAN/BRAKE MANIFOLD ON CERTAIN 12M, 14M, 120M, 140M, AND 160M MOTOR GRADERS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE 158-9956 CHECK VALVE IN THE FAN/BRAKE MANIFOLD ON CERTAIN 12M, 14M, 120M, 140M, AND 160M MOTOR GRADERS

Usage:

REBE5323-00

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30Jul2009

U-280

A-237

D-244

O-252

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*Before/After*	PRODUCT SUPPORT PROGRAM FOR REPLACING THE 158-9956 CHECK VALVE IN THE FAN/BRAKE MANIFOLD ON CERTAIN 12M, 14M, 120M, 140M, AND 160M MOTOR GRADERS
5051 5467 5479 5069 5264		PS42950

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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 "PS42950" 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

31Jul2011

PROBLEM

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A high frequency noise in the cab may be heard on certain 12M, 14M, 120M, 140M, and 160M Motor Graders when operating in warm ambient conditions. The noise is created when the hydraulic fan is at high fan speed and system pressure is higher than the accumulator charge pressure which allows continuous accumulator charging. The new check valve will reduce flow to the accumulators after they are fully charged which will reduce the high frequency noise in the cab.

AFFECTED PRODUCT

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Model	Identification Number
*****Group 1*****
14M	B9J00105-01051

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*****Group 2*****
120M	B9C00130-00509 B9N00130-00268 B9W00100-00187 D9W00100-00132
12M	B9F00012-00643 B9R00012-00158
140M	B9D00125-02046 B9G00100-00251 B9M00125-00900 D9G00100-00189
160M	B9E00115-00375 B9L00115-00120, 150-443 B9T00100-00155 D9T00100-00120

PARTS NEEDED

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Qty	Part Number	Description
*****Group 1*****
1	3480421	VALVE GP-CHECK-E
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 32% 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.
*****Group 2*****
1	3480421	VALVE GP-CHECK-E
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 18% 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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Replace the existing ball type 158-9956 Check Valve with a new popet type 348-0421 Check Valve. 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%
*****Group 1*****
0-4000 hrs, 0-36 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

NOTE: This is a 1.0-hour job for Group 1

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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%
*****Group 2*****
0-4000 hrs, 0-36 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

NOTE: This is a 1.0-hour job for Group 2

PARTS DISPOSITION

Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

Rework Procedure

Group Number 1

Refer to the Service Manual if/as necessary.

NOTE: Pay special attention the the section on releasing system pressure in the Operation and Maintenance Manual.

Remove the (4) bolts on the right rear enclosure panel to access the Fan/Brake Manifold. Image 1.1.1

Image1.1.1

The check valve is located on the bottom of the Fan/Brake Manifold. Image 1.2.1 Replace the existing check valve with new 348-0421 Check Valve and tighten to a torque of 40 +/- 4 Nm.

Image1.2.1

Group Number 2

Refer to the Service Manual if/as necessary.

NOTE: Pay special attention the the section on releasing system pressure in the Operation and Maintenance Manual.

Open the right side engine enclosure door to access the Fan/Brake Manifold. Image 2.1.1

Image2.1.1

The check valve is located on the bottom of the Fan/Brake Manifold. Image 2.2.1 Remove the 2 bolts securing the Fan/Brake Manifold to the bracket. Move Fan/Brake Manifold to access the check valve. Replace the existing check valve with new 348-0421 Check Valve and tighten it to a torque of 40 +/- 4 Nm. Install the 2 previously removed mounting bolts and tighten them to a torque of 30 +/- 7 Nm.