PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REWORKING THE SERVICE BRAKE HOSE LINES ON CERTAIN 966M AND 972M MEDIUM WHEEL LOADERS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REWORKING THE SERVICE BRAKE HOSE LINES ON CERTAIN 966M AND 972M MEDIUM WHEEL LOADERS [UEBE0016]

BRAKING SYSTEM

CONTROL GP

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REWORKING THE SERVICE BRAKE HOSE LINES ON CERTAIN 966M AND 972M MEDIUM WHEEL LOADERS

UEBE0016-00

Show/hide table

05Dec2019

U-735

O-640

Show/hide table

Safety	PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REWORKING THE SERVICE BRAKE HOSE LINES ON CERTAIN 966M AND 972M MEDIUM WHEEL LOADERS
4257 4265 5057		PI11233

Show/hide table

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 "PI11233" 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 "PI11233" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

Show/hide table

PROBLEM

Show/hide table

The existing 472-0163 and 472-0164 Brake Hoses, running from the service brake valve under the cab to front and rear axles, need to be inspected and possibly reworked on certain 966M and 972M Medium Wheel Loaders. The existing hose connections for the front and rear axles may have been improperly assembled at the service brake valve. Incorrect assembly will cause incorrect service brake pressure distribution between the front and rear axles, but will not impact brake performance (either stopping distance or slope holding).

AFFECTED PRODUCT

Show/hide table

Model	Identification Number
966M	MD700160-00196, 401-526
966M XE	DZL00260-00290, 501-587, 589-595
972M	WGN00170-00193, 401-469
972M XE	R1Z00270-00292, 501-574

PARTS NEEDED

Show/hide table

No parts needed for this program

ACTION REQUIRED

Show/hide table

Inspect the brake hose connections at the service brake valve under the cab for the 472-0163 and 472-0164 Brake Hoses running from brake valve to front and rear axles and reassemble, if necessary.

Refer to the attached Rework Procedure.

Show/hide table

OWNER NOTIFIAVSION

Show/hide table

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

SERVICE CLAIM ALLOWANCES

Show/hide table

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

Show/hide table

NOTE: This is a 1.0-hour job
Note: This is a 1.0 hour job for inspection only of the service brake valve hose connections. Note: An additional 3.0 hours will be allowed for rework of the service brake valve hose connections if they were found to be improperly assembled.

Show/hide table

PARTS DISPOSITION

Show/hide table

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

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

Show/hide table

EXAMPLE COPY OF OWNER NOTIFIAVSION

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

SAFETY - PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REWORKING THE SERVICE BRAKE HOSE LINES

MODELS INVOLVED - CERTAIN 966M AND 972M MEDIUM WHEEL LOADERS

Dear Cat Product Owner:

The existing 472-0163 and 472-0164 Brake Hoses, running from service brake valve under the cab to front and rear axles, need to be inspected and possibly reworked on the products listed below. The existing hose connections for the front and rear axles may have been improperly assembled at the service brake valve. Incorrect assembly will cause incorrect service brake pressure distribution between the front and rear axles, but will not impact brake performance (either stopping distance or slope holding). 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.

You may now search for open Safety Service Letters by entering your product serial number(s). Visit the AVS.COM/SAFETY website and click on SUPPORT, then SAFETY SERVICES for more information. Please refer the dealer to their Service Letter dated 05Dec2019 when scheduling this service.

We regret the inconvenience this may cause you, and urge you to have this service performed for your safety and satisfaction.

AVSpare Inc.

Identification #(s)

Attached to 05Dec2019 Service Letter

Rework Procedure

Show/hide table

Refer to UENR5562, Disassembly and Assembly, "Brake Control Valve (Service) - Remove and Install", to complete this Rework Procedure.

Refer to UENR0376, Testing and Adjusting Manual, "Service Brake System Pressure ? Test", for additional information.

Refer to UENR0376, Testing and Adjusting, "Service Brakes ? Test", for additional information.

Refer to UENR3825, Testing and Adjusting , "Service Brake System Pressure ? Test", for additional information.

Refer to UENR3825, Testing and Adjusting, "Service Brakes ? Test", for additional information.

1. Inspect the brake hose connections at the service brake valve under the cab for the 472-0163 and 472-0164 Hose Assemblies running from the brake valve to the front and rear axles as shown in Image1.1.1 and 1.1.2.

Note: Image1.1.1 shows the location of the brake control valve on left side of machine under the cab.

Note: Image1.1.2 shows the correct installation of the brake hoses to the appropriate ports on service brake valve.

2. Ensure that 472-0163 Brake Hose (B) is connected to the front axle pressure port (A1) on top half of the brake valve.

3. Ensure that 472-0164 Brake Hose (C) is connected to the rear axle pressure port (A2) on bottom half the brake valve.

- If the existing two brake hoses have been properly assembled, no further rework is required.

- If the existing two brake hoses have been improperly swapped between the two pressure ports on brake valve, reconnect the hoses as described above.

Note: Proper brake pressure should be set and tested for the service brake valve after each new installation or repair by following the instructions on below reference documents.