PRODUCT SUPPORT PROGRAM FOR UPDATING THE STEERING SYSTEM CONTROL VALVE PUMP ON CERTAIN 12K, 140K, AND 160K MOTOR GRADERS Caterpillar

PRODUCT SUPPORT PROGRAM FOR UPDATING THE STEERING SYSTEM CONTROL VALVE PUMP ON CERTAIN 12K, 140K, AND 160K MOTOR GRADERS [UEBE0604]

HYDRAULIC SYSTEM

PUMP GP

PRODUCT SUPPORT PROGRAM FOR UPDATING THE STEERING SYSTEM CONTROL VALVE PUMP ON CERTAIN 12K, 140K, AND 160K MOTOR GRADERS

UEBE0604-00

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15Apr2020

U-198

A-154

O-184

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Before/After	PRODUCT SUPPORT PROGRAM FOR UPDATING THE STEERING SYSTEM CONTROL VALVE PUMP ON CERTAIN 12K, 140K, AND 160K MOTOR GRADERS
5070 5455		PS46636

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NOTE:

AVSpare’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 AVSpare.

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 "PS46636" 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 AVSpare product analyst.

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TERMINATION DATE

30Apr2022

PROBLEM

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Certain 12K, 140K, and 160K Motor Graders may experience difficult steering when coming out of a ditch or when steering into/up a bank. The reason is some 484-6745 Piston Pumps (Steering) were built with a 572-8132 Pump Control Valve that has an orifice installed instead of a plug, allowing pressure to bleed off in select applications.

AFFECTED PRODUCT

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Model	Identification Number
*****Group 1*****
12K	SZP20112
140K	SZL20290-20306, 20313-20316, 20325
160K	SZM20156, 20158

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*****Group 2*****
12K	JJA03613-03615, 3618-3630
140K	JPA05144-05146, 5149-5155, 5157, 5163-5167, 5170-5199, 5202-5240, 5245-5277, 5279-5281

PARTS NEEDED

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Qty	Part Number	Description
*****Group 1*****
1	1R7495	SETSCREW-SOCKET
1	0951751	SEAL-O-RING
1	2807870	GASKET
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	1R7495	SETSCREW-SOCKET
1	0951751	SEAL-O-RING
1	2807870	GASKET
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.

ACTION REQUIRED

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Update 572-8132 Pump Control Valve with a 1R-7495 Plug to improve operation in all applications.

WARNING. Read and understand the Operation and Maintenance Manual for safety information and safe working practices before starting this Rework Procedure.

Park on a level surface. If you must park on a grade, chock the machine.

Apply the service brake to stop the machine. Move the transmission control to the NEUTRAL position.

Move the speed control lever to the LOW IDLE position.

Engage the parking brake.

Lower all attachments to the ground.

Stop the engine.

Operate all hydraulic controls through all positions to relieve hydraulic pressure.

Repeat this step until all hydraulic pressure is released.

Turn the engine start switch to OFF position and remove the key.

Turn battery disconnect switch to the OFF position.

Locate 484-6745 Piston Pump

Locate 572-8132 Pump Control Valve

1.1 - Remove four bolts holding control valve (572-8132)

1.2 ? Remove valve and any paint chips nearby valve oil passages

2.1 ? Make a line between valve body and adjustment cap

2.2 ? Loosen FR valve unit with a 3/4 inch size wrench or adjustable wrench. Be sure not to turn nut (#3 - 469-3296) as that is preset by the factory.

2.3 ? Carefully remove FR valve components paying special attention to avoid mishandling of spool and ingression of contaminants.

3.1 ? Locate 0.35 mm Orifice in valve

3.2 ? Keep valve on vertical position and unscrew orifice with a 2mm Allen bit / wrench

3.3 ? Ensure 0.35 mm Orifice is removed from valve

4.1 ? Use contact cleaner or any similar solution to flush any Loctite residue from removed orifice. Use case drain oil passage as shown to flush it.

5.1 ? Use 1R-7495 Plug

5.2 ? Apply one single drop of Loctite 603 on plug thread

5.3 ? Install the 1R-7495 Plug in valve

5.4 ? Apply final torque of 0.8 Nm to the plug.

6.1 ? Re-install spool, spring plate and springs to into valve body.

6.2 ? Re-torque valve cap until line made on step 2.1 is aligned to line on valve body.

7.1 ? Re-install valve, gasket (280-7870) and re-install bolts, apply final torque of 15.4 Nm.

Ensure hydraulic fluid is within acceptable range

Return machine to service.

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SERVICE CLAIM ALLOWANCES

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Product smu/age whichever comes first	AVSpare		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
*****Group 1*****
0-5000 hrs, 0-60 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

NOTE: This is a 2.0-hour job for Group 1

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Product smu/age whichever comes first	AVSpare		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
*****Group 2*****
0-5000 hrs, 0-60 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%