PRODUCT IMPROVEMENT PROGRAM FOR TESTING AND ADJUSTING THE LOAD CHECK VALVES ON CERTAIN 924K, 930K, 938K, 926M, 930M, AND 938M SMALL WHEEL LOADERS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR TESTING AND ADJUSTING THE LOAD CHECK VALVES ON CERTAIN 924K, 930K, 938K, 926M, 930M, AND 938M SMALL WHEEL LOADERS [UEBE1394]

HYDRAULIC SYSTEM

LINES GP-CYLINDER

PRODUCT IMPROVEMENT PROGRAM FOR TESTING AND ADJUSTING THE LOAD CHECK VALVES ON CERTAIN 924K, 930K, 938K, 926M, 930M, AND 938M SMALL WHEEL LOADERS

UEBE1394-00

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09Nov2020

U-654

D-615

O-606

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Priority	PRODUCT IMPROVEMENT PROGRAM FOR TESTING AND ADJUSTING THE LOAD CHECK VALVES ON CERTAIN 924K, 930K, 938K, 926M, 930M, AND 938M SMALL WHEEL LOADERS
5102 5057 5051 5067		PI33232

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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 as soon as possible. When reporting the repair, use "PI33232" as the Part Number and "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. Exception: If the repair is done after failure, use "PI33232" as the Part Number, "7751" as the Group Number, "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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COMPLETION DATE	TERMINATION DATE
31May2021	30Nov2021

PROBLEM

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The existing load check valves may be improperly adjusted at the factory resulting in failure to meet ISO8643:2017 on certain 924K, 930K, 938K, 926M, 930M, and 938M Small Wheel Loaders.

AFFECTED PRODUCT

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Model	Identification Number
924K	KW402143, 2299, 2325, 2329, 2334, 2339, 2343, 2394, 2401, 2429, 2507, 2514
926M	W5L00103, 498
930K	FRK00778-00788 P3K01015, 1023, 1029, 1033, 1035, 1051, 1054, 1072
930M	KTG05386
938K	REP00930, 936 W8K02051, 2102, 2152, 2259, 2261, 2263-2264, 2267, 2270, 2288, 2291, 2299, 2374, 2384-2385, 2388, 2393
938M	P5K00693

PARTS NEEDED

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Qty	Part Number	Description
1	4208629	SFWR GP-A3000
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 45% 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 attached Rework Procedure.

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OWNER NOTIFIAVSION

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Owners in the following countries will receive the attached Owner Notification:
US
Canada

SERVICE CLAIM ALLOWANCES

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AVSpare		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
100%	100%	0%	0%	0%	0%

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NOTE: This is a 1.5-hour job

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PARTS DISPOSITION

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

MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

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EXAMPLE COPY OF OWNER NOTIFIAVSION

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR TESTING AND ADJUSTING THE LOAD CHECK VALVES

MODELS INVOLVED - CERTAIN 924K, 930K, 938K, 926M, 930M, AND 938M SMALL WHEEL LOADERS

Dear Cat Product Owner:

The existing load check valves needs to be adjusted on the products listed below. The existing load check valves may be improperly adjusted at the factory resulting in failure to meet ISO8643:2017. You will not be charged for the service performed.

Contact your local Cat dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service.

If you are no longer the owner of this product(s), please contact your local Cat dealer so that our records can be updated. Please refer the dealer to their Service Letter dated 09Nov2020 when scheduling this service.

We regret the inconvenience this may cause you, and urge you to have this service performed as soon as possible to prevent unscheduled downtime.

AVSpare Inc.

Identification #(s)

Attached to 09Nov2020 Service Letter

Rework Procedure

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1. Install machine software 4208629V51, contact Small Wheel Loader Product Support team for flash file.

Note: Refer to UENR6086, Testing and Adjusting, "Machine preparation for Testing and Adjusting".

2. Remove the caps on both valves to expose the valve adjustments. Refer to Image1.2.1.

Image1.2.1

3. Adjust the valves according to the result achieved in the test. The adjustment screw takes a 10mm allen wrench to adjust. Both left valve part number 522-6651 and right valve part number 522-7608 on the lift cylinders will need to be adjusted if a failing result is achieved. Both left and right valves should be adjusted by the same amount each time.

Note: The valves are sensitive, small adjustments can lead to large changes. To avoid many iterations, it is best to make small adjustments to start.

If Start Current 2 minus Start Current 1 less than 10 mA, the setting of both valves need to be increased.

Increase the valve setting by rotating the adjustment screw clockwise, starting with a small 1/8 of a turn or less adjustment.

Before re-running the calibration, verify that lower modulation feels acceptable.
If Start Current 2 minus Start Current 1 is greater than 20 mA, the setting of both valves need to be decreased.

Decrease the valve setting by rotating the adjustment screw counter-clockwise, starting with a small 1/8 of a turn or less adjustment.

4. Repeat the calibration process in E.T. If Start Current 2 minus Start Current 1 equals 10 to 20 mA, no further adjustment of the load check valves is needed. Repeat process until a passing result is achieved.

5. Install the latest version of machine software available in SIS web.