After Failure Only
| PRODUCT SUPPORT PROGRAM FOR REWORKING THE REAR SUSPENSION CYLINDER ON CERTAIN 770, 772, 773F, 775F, AND 777F OFF-HIGHWAY TRUCKS |
| 7201 7200 7213 |
PS51741 |
| 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 "PS51741" 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. |
| 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. |
| The existing rear suspension cylinder can leak on certain 770, 772, 773F, 775F, and 777F Off-Highway Trucks. If the existing rear suspension cylinder rod does not have an adequate surface, the suspension cylinder can leak and loose ride height. |
Qty |
Part Number |
Description |
|
*******Group 1*******
|
| 1 |
2976848 |
Seal Kit |
| In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 1% 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. |
|
*******Group 2*******
|
| 1 |
2976849 |
Seal Kit |
| In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 3% 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. |
|
*******Group 3*******
|
| 1 |
2976848 |
Seal Kit |
| 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. |
Suspension cylinders that are leaking need to have rods polished to meet the surface finish requirements and resealed prior to being reinstalled on the vehicle.
Suspension cylinders on these vehicles have an HVOF surface coating. The HVOF coating has different surface finish requirements then chrome. Proper surface finish of the HVOF coating is Rz < 0.7 micrometer when measured using a profilometer with a 5 micrometer stylus. Information on polishing HVOF components can be found within SEBF8072.
For Reuse And Salvage Guidelines, reference:
SEBF8072: Inspection and Salvage of Hydraulic Cylinder Components
For Disassembly and Assembly Procedures, reference:
RENR8311: 777F Off-Highway Truck Machine Systems
RENR8286: 773F and 775F Off-Highway Trucks Machine Systems
RENR8273: 770 and 772 Off-Highway Trucks Machine Systems |