HOSE-UPPER 2320978 - Caterpillar

TERMINATION DATE
30Sep2019
PROBLEM
The existing hydraulic brake cooling tubes can crack and fail on certain 793D and 793F Off-Highway Trucks. If the existing tube fails, it will result in high brake temperatures.
AFFECTED PRODUCT
Model Identification Number
793F SSP00791, 856, 976-977, 982
PARTS NEEDED
Qty
Part Number Description
2 1H0474 SEAL-O-RING (After Failure Only)
2 5F3092 SEAL-O-RING (After Failure Only)
1 1023482 GASKET
1 2938183 TUBE AS. (After Failure Only)
1 3677901 TUBE AS (After Failure Only)
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
Before Failure Inspection Only:
When performing a scheduled oil change, while the tank is empty, remove the access panel and inspect two brake cooling tubes for cracks at or near the flange. Refer to Image1. If no cracks are found, this Rework Procedure is completed. If the inspection reveals a cracked tube, replace the failed tube with a new tube (current part).
After Failure:
We believe that most tube failures are due to misalignment of the tube and pump. Follow these steps when replacing a failed tube.
1. Loosen all bolts, pump to tank, support bracket to tank, and support bracket to pump holding the pump in place.
2. Remove failed tube assembly and install new tube assembly (current part) to the pump and tighten.
3. Then adjust to center the tube in the hole in the block on tank wall.
4. Tighten the pump to tank bolts taking care not to change alignment of tube in hole.
5. Adjust the support plate so that it sits flat against both the bottom of the tank and the end of the pump stack.
6. Tighten the bolts in support plate to tank bottom.
7. Tighten the bolts in support plate to end of pump stack.
Image1
SERVICE CLAIM ALLOWANCES
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
0-24000 hrs,
0-60 mo 100.0% 100.0% 0.0% 0.0% 0.0% 0.0%
This is a 2.0-hour job
2.0 hours is allowed for inspection of the tubes. An additional
2.0 hours is allowed if a failed part is found during an
inspection.
An allowance of 6.0 total hours can be applied if a failure occurs
outside of a scheduled oil change interval.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.