PRODUCT SUPPORT PROGRAM FOR REPLACING THE PUMP DRIVE GROUP ON CERTAIN 793D OFF-HIGHWAY TRUCKS
Usage:
REBE8946-01
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| 21Nov2012 |
| (Revised 10Jun2014) |
U-626
A-495
D-534
O-576
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| After Failure Only | PRODUCT SUPPORT PROGRAM FOR REPLACING THE PUMP DRIVE GROUP ON CERTAIN 793D OFF-HIGHWAY TRUCKS |
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| 3108 | PS52342 |
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| NOTE: | This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS52342" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "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 Caterpillar product analyst. |
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| NOTE: | This Revised Service Letter replaces the 21Nov2012 Service Letter. Changes have been made to Problem Statement and Action to mention the alternative pump drive used on some earlier machines. |
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TERMINATION DATE |
| 30Nov2015 |
PROBLEM
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| The existing 149-3060 Pump Drive Group (304-6663 on some earlier machines) can overheat, due to elevated oil levels, and fail the bearings and/or gears on certain 793D Off-Highway Trucks. The magnetic plug for the pump drive needs to be inspected every 500 hours. If debris is present on the magnetic plug, the pump drive will need to be replaced. Refer to the images in the attached rework procedure to determine whether the plug has sufficient debris to require the replacement of the pump drive. |
AFFECTED PRODUCT
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| Model | Identification Number |
| 793D | FDB00105-01690 |
PARTS NEEDED
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Qty |
Part Number | Description |
| 2 | 6V5553 | SEAL-O-RING |
| 2 | 6V7681 | SEAL-O-RING |
| 1 | 6V8636 | ADAPTER-STR |
| 1 | 6V8724 | ADAPTER-ELBOW 90 |
| 3 | 6V8774 | ADAPTER-TEE |
| 1 | 6V8781 | ADAPTER-TEE |
| 1 | 6V9836 | ADAPTER-TEE |
| 1 | 6V9850 | ADAPTER-ELBOW |
| 1 | 8T1682 | ADAPTER-ELBOW |
| 1 | 1587594 | ADAPTER-ELBOW |
| 4 | 1600011 | STUD-TAPERLOCK |
| 6 | 2147568 | SEAL-O-RING-STOR |
| 13 | 2287089 | SEAL-O-RING-ORFS |
| 2 | 2287095 | SEAL-O-RING-ORFS |
| 1 | 2287096 | SEAL-O-RING-STOR |
| 1 | 2385086 | SEAL-O-RING-STOR |
| 1 | 2958735 | TUBE AS. |
| 1 | 2958740 | TUBE AS. |
| 1 | 2958741 | TUBE AS. |
| 1 | 3864053 | TUBE AS |
| 1 | 3864054 | TUBE AS |
| 1 | 3864902 | DRIVE GP-PUMP |
| 1 | 3867464 | HOSE AS |
| In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 2% 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. |
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ACTION REQUIRED
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| Remove the pump drive shaft - refer to the "Pump Drive Shaft (Hydraulic) - Remove and Install" section of RENR8332. Remove the piston pump - refer to the "Piston Pump (Steering) - Remove and Install" section of RENR8332. Remove the piston pump - refer to the "Piston Pump (Hydraulic Fan) - Remove and Install" section of RENR8332. Remove the gear pump - refer to the "Gear Pump (Brake, Hoist) - Remove and Install" section of RENR8332. Remove the pump drive - refer to the "Pump Drive - Remove and Install" section of RENR8332. Inspect and clean the torque convertor sump screen - refer to the "Suction Screen (Torque Converter)- Clean" section of SEBU7792. Refer to the attached rework procedure for assembly of pump drive. Reinstall components in reverse order. Note: If replacing a 304-6663 Pump Drive, the 300-3304 Yoke As. from the 304-6663 must be retained and used in place of the 173-5798 Yoke As. that comes with the 386-4902 Pump Drive. |
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SERVICE CLAIM ALLOWANCES
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0-18 mo |
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19-36 mo |
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| NOTE: This is a 28.0-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. |
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| Unacceptable amount of debris. |
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| Image1.1.1 |
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| Image1.1.2 |
| Acceptable amount of debris. |
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| Image1.2.1 |
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| Image1.2.2 |
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| Image1.3.1 |
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| Image1.3.2 |
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| Image1.3.3 |
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| Image1.3.4 |
Caterpillar Information System:
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