- Off-Highway Truck/Tractor
- 797 (S/N: 5YW260-260)
- 797B (S/N: JSM146-147,151-152,220-225,236-237,244-244,252-252,256-256,293-293)
Introduction
Reference: Special Instruction , M0087915, "Procedure to Improve the ATAAC Tubes on Certain 797 and 797B Off-Highway Trucks"
A procedure to improve the ATAAC tubes on certain 797 and 797B Off-Highway Trucks is now available. The procedure is adaptable to 797 and 797B Off-Highway Trucks that have been retrofitted with the Cat© C175 engine.
| |
| Illustration 1 | g06299494 |
|
A view of the new tube assembly configuration looking forward from the back of the cooling arrangement | |
| |
| Illustration 2 | g06299504 |
|
A view of the former tube assembly configuration looking forward from the back of the cooling arrangement | |
The 283-1973 Air Lines Gp (ATAAC) has been improved. New, stronger tube assemblies are now used on the machines. New, stronger bracket assemblies are now used to support the new tube assemblies. A new elbow is now used that is made from material that will provide longer service life in the field. The former elbow part number has been canceled. Refer to Table 1 for a partial list of new, and former part numbers.
| Parts List | |||
| Qty | New Part Number | Part Name | Former Part Number |
| 1
and 1 |
Bracket As
Bracket As |
||
| 1
and 1 |
Bracket As
Bracket As |
||
| 1
and 1 |
Bracket As
Bracket As |
||
| 1 | Tube As | ||
| 1 | Tube As | ||
| 1 | Elbow | ||
Refer to Special Instruction , M0087915, "Procedure to Improve the ATAAC Tubes on Certain 797 and 797B Off-Highway Trucks" for the necessary parts and correct procedures to update the ATAAC tubes to the current configuration.
The Special Instruction is available through the normal literature distribution system. The publication can also be found on the Caterpillar Service information System (SIS).