PRODUCT SUPPORT PROGRAM FOR INSTALLING A CHECK VALVE AND A NEW DIVERTER VALVE IN THE HYDRAULIC CONTROL SYSTEM FOR THE COOLING FAN ON CERTAIN 725, 730, AND 730 EJECTOR ARTICULATED TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR INSTALLING A CHECK VALVE AND A NEW DIVERTER VALVE IN THE HYDRAULIC CONTROL SYSTEM FOR THE COOLING FAN ON CERTAIN 725, 730, AND 730 EJECTOR ARTICULATED TRUCKS

Usage:

REBE4234-00

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30Oct2008

U-551

A-456

D-468

O-505

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*After Failure Only*	PRODUCT SUPPORT PROGRAM FOR INSTALLING A CHECK VALVE AND A NEW DIVERTER VALVE IN THE HYDRAULIC CONTROL SYSTEM FOR THE COOLING FAN ON CERTAIN 725, 730, AND 730 EJECTOR ARTICULATED TRUCKS
5059 5066 4286		PS51580

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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 "PS51580" 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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TERMINATION DATE

31Oct2010

PROBLEM

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Low brake pressure warnings may be incorrectly recorded on certain 725, 730, and 730 Ejector Articulated Trucks. The warnings may occur on machines that are operating in high ambient conditions. Excessive noise and vibration may also be noticed from the hydraulic lines for the cooling fan.

AFFECTED PRODUCT

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Model	Identification Number
*****Group 1*****
725	AFX01179-01648 B1L00111-01942
730	AGF01092-01561 B1M00121-02008
730EJ	B1W00161-00331

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*****Group 2*****
725	B1L02137-02600
730	B1M02352-03000
730EJ	B1W00351-00500

PARTS NEEDED

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Qty	Part Number	Description
*****Group 1*****
1	2P1314	CONNECTOR
2	3J1907	SEAL-O-RING
1	3J7354	SEAL-O-RING
1	3K0360	SEAL-O-RING
2	4J7533	SEAL-O-RING
2	6V0394	CONNECTOR-PORT
1	7J4026	ELBOW
2	7K1181	STRAP-CABLE
2	7X2534	BOLT
2	8T4121	WASHER-HARD
2	8T4186	BOLT
2	9X8256	WASHER
1	0307946	ELBOW
1	0308193	CONNECTOR-FLARED
3	2231353	HOSE AS
1	3220596	VALVE GP-CHECK
1	3221453	BODY
1	3234814	BRACKET AS.
1	3264489	VALVE GP-DVTR-C
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 2% 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	2P1314	CONNECTOR
2	3J1907	SEAL-O-RING
1	3J7354	SEAL-O-RING
1	3K0360	SEAL-O-RING
2	4J7533	SEAL-O-RING
2	6V0394	CONNECTOR-PORT
1	7J4026	ELBOW
2	7K1181	STRAP-CABLE
2	7X2534	BOLT
2	8T4121	WASHER-HARD
2	8T4186	BOLT
2	9X8256	WASHER
1	0307946	ELBOW
1	0308193	CONNECTOR-FLARED
3	2231353	HOSE AS
1	3220596	VALVE GP-CHECK
1	3221453	BODY
1	3234814	BRACKET AS.
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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Refer to the Service Manual and the attached Rework Procedure to install the new parts. A check valve can be added to the pilot oil control system for the cooling fan. Installing the check valve will prevent incorrect low brake charging pressure warnings from occurring. A new diverter valve prevents noise and vibration in the hydraulic lines for the cooling fan.

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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, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
4001-6000 hrs, 25-48 mo	33.0%	50.0%	0.0%	0.0%	50.0%	50.0%

NOTE: This is a 6.0-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, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
4001-6000 hrs, 25-48 mo	33.0%	50.0%	0.0%	0.0%	50.0%	50.0%

NOTE: This is a 5.5-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 Special Instruction REHS4059 "Installation of the 323-4207 Valve and Lines for 725,730, and 730 Ejector Articulated Trucks" for the proper procedure to install the check valve arrangement.

Remove the 239-0603 Diverter Valve from the 240-0678 Manifold and install a new 326-4489 Diverter Valve.

Group Number 2

Machines listed in Group 2 have had the new 326-4489 Diverter Valve installed at the factory and do not need to have it replaced.