PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REPLACING CLUTCH HOUSINGS ON CERTAIN 793F OFF-HIGHWAY TRUCKS Caterpillar


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PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REPLACING CLUTCH HOUSINGS ON CERTAIN 793F OFF-HIGHWAY TRUCKS [UEBE1155]
POWER TRAIN
TRANSMISSION GP
PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REPLACING CLUTCH HOUSINGS ON CERTAIN 793F OFF-HIGHWAY TRUCKS
UEBE1155-01

06Oct2020
(Revised 11Nov2020)


U-589
A-485
D-556

 

Before/After

  
  

PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REPLACING CLUTCH HOUSINGS ON CERTAIN 793F OFF-HIGHWAY TRUCKS

3160
PS46879
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 "PS46879" 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.

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.

 
NOTE:

This Revised Service Letter replaces the 06Oct2020 Service Letter. Changes have been made to the Parts Needed and Action Required.


TERMINATION DATE

31Oct2022

PROBLEM

The existing clutch 5 housing can fail on certain 793F Off-Highway trucks equipped with AS6 transmissions causing shifting problems and low pressure in Clutch 6. The failure of the Clutch 5 housing occurs with a crack at the oil passage port.

AFFECTED PRODUCT

Model Identification Number
793F D3T00143-00175, 181-183

SSP01234-01271

PARTS NEEDED

Qty

Part Number Description
2 5D6428 SEAL-O-RING (After Failure Only)
1 6I8171 RING-SEAL (After Failure Only)
1 7G6373 GASKET
4 8M5254 SEAL-O-RING (After Failure Only)
1 9N4146 RING-SEAL INT (After Failure Only)
1 5076121 HOUSING AS (After Failure Only)
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

Please refer to Special Instruction M0121793, "Procedure for Ultrasonic Inspection of Planetary Group Housing for 793D and 793F Off-Highway Trucks". Please note that the inspection can be completed with an assembled transmission and an assembled transmission installed on 793F's.
To inspect on an installed transmission:
1. Remove Transmission Top Cover (249-7054) and gasket (7G-6373)
2. Keep the controls manifold in place. Do not remove to inspect Clutch Housing as this may introduce debris into the system.
3. Perform the inspection with instructions from M0121793 and Image 2.
.. If all measurements are greater than 6 mm, than there is no additional action to take and the part will perform to full life.
.. If any measurement is between 5-6 mm, then replace the clutch 5 housing at the next PCR.
.. If any measurement is below 5 mm, then replace the housing as soon as possible.
4. Replace gasket (7G-6373) and reinstall transmission cover.

Multiple quality checks and improvements have been made to the 507-6122 Clutch Housing. Housing with casting code xxNRMN have no concern of having a thin walled section. Image 3 shows casting code location.
Image1
Image2
Image3

SERVICE CLAIM ALLOWANCES

Product smu/age whichever comes first
AVSpare
Dealer Suggested
Customer Suggested
Parts %
Labor Hrs%
Parts %
Labor Hrs%
Parts %
Labor Hrs%
0-6000 hrs,
0-12 mo 
100.0%
100.0%
0.0%
0.0%
0.0%
0.0%
6001-12000 hrs,
13-24 mo 
33.0%
50.0%
0.0%
0.0%
50.0%
50.0%
 NOTE: This is a 2.0-hour job
2 hours of labor will be allotted for ultrasonic inspection.

If all measurements of the housing are 6 mm or more, the 2 hours of labor will be provided.

If there is a measurement between 5-6 mm, then a new housing will provided at PCR with no additional labor provided.

If there is a measurement below 5 mm, then 40 hours of labor and parts listed in the letter will be provided.



PARTS DISPOSITION

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

Information System:

PRODUCT SUPPORT PROGRAM FOR REPLACING REAR SPINDLES AT PCR ON CERTAIN 777F OFF-HIGHWAY TRUCKS
PRODUCT SUPPORT PROGRAM FOR REPLACING THE 262-9948 BOLTS AND 476-7141 HOUSING ASSEMBLY USED IN THE PLANETARY ON CERTAIN R1700 LOAD-HAUL DUMP MACHINES
PRODUCT SUPPORT PROGRAM FOR REPLACING THE HANDLE ASSEMBLY IN THE CAB LEFT HAND SIDE DOOR GROUP ON CERTAIN 773E AND 777E OFF-HIGHWAY TRUCKS
PRODUCT SUPPORT PROGRAM FOR REPLACING THE YOKE ON CERTAIN CS54B AND CP54B VIBRATORY SOIL COMPACTORS
PRODUCT SUPPORT PROGRAM FOR REBUILDING THE DIFFERENTIAL ON 777E OFF-HIGHWAY TRUCKS
PRODUCT SUPPORT PROGRAM FOR REBUILDING THE DIFFERENTIAL ON 777E OFF-HIGHWAY TRUCKS
PRODUCT SUPPORT PROGRAM FOR REPLACING TRANSMISSION CLUTCH CONTROL VALVES ON CERTAIN 735C, 740, 740 EJ, 745, AND 745C ARTICULATED TRUCKS
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PRODUCT SUPPORT PROGRAM FOR REPLACING THE PRODUCT LINK HARDWARE ON CERTAIN 18 MOTOR GRADERS
PRODUCT SUPPORT PROGRAM FOR REPLACING THE WATER PUMP ON CERTAIN 745 ARTICULATED TRUCKS
PRODUCT SUPPORT PROGRAM FOR INSTALLING ADDITIONAL BOLTS TO THE TOW ARM AND DROP ARM JOINT FOR CERTAIN AP655F ASPHALT PAVERS EQUIPPED WITH SE60 V XW AND SE60 VT XW SCREEDS
PRODUCT SUPPORT PROGRAM FOR REWORKING THE TRANSMISSION ON CERTAIN 745 AND 745C ARTICULATED TRUCKS
PRODUCT SUPPORT PROGRAM FOR REPLACING THE WHEEL (HUB) ON CERTAIN 745C ARTICULATED TRUCKS
PRODUCT SUPPORT PROGRAM FOR RELOCATING THE THERMOSTATIC CONTROL MODULE ON CERTAIN 797F OFF-HIGHWAY TRUCKS
PRODUCT SUPPORT PROGRAM FOR REPLACING THE RADIATOR ON CERTAIN 793D OFF-HIGHWAY TRUCKS
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 583-6638 GRADER BLADE WING KITS IN DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR REROUTING THE HOSE ASSEMBLY FROM TOP OF THE CHARGE PUMP ON CERTAIN 259D3 COMPACT TRACK LOADERS AND 236D3/242D3 SKID STEER LOADERS
PRODUCT SUPPORT PROGRAM FOR REPLACING THE SHIFT VALVE ON CERTAIN CP54B, CP56B, CS54B, CS56B, CS74B, AND CS78B VIBRATORY SOIL COMPACTORS
PRODUCT IMPROVEMENT PROGRAM FOR REMOVING ALL 516-2725 DEF PUMPS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND REPLACING 395-5455 AND 395-5456 HOSE ASSEMBLIES ON CERTAIN MH3037 MATERIAL HANDLERS
PRODUCT SUPPORT PROGRAM FOR REPLACING THE SPEED SENSOR ON CERTAIN COMPACTORS AND AP355F PAVERS
PRODUCT SUPPORT PROGRAM FOR INSPECTING AND POSSIBLY REROUTING THE EXCITION LEADS ON CERTAIN GENERATORS USED ON CERTAIN 795F AC OFF-HIGHWAY TRUCKS