CONVERTER-POWER 3482134 - Caterpillar

Agricultural Tractors:
Challenger 75 (S/N: 4CJ1-UP)
Challenger 75C (S/N: 4KK1-UP)
Challenger 75D (S/N: 5AR1-UP)
Challenger 85C (S/N: 9TK1-UP)
Challenger 85D (S/N: 4GR1-UP)
Challenger 65E (S/N: 6GS1-UP; 1GM1-UP)
Challenger 75E (S/N: 6HS1-UP; 1HM1-UP)
Challenger 85E (S/N: 6JS1-UP; 1NM1-UP)
Challenger 95E (S/N: 6KS1-UP; 1SM1-UP)
Description of Change: The profile of the flywheel has been changed on Challenger Tillage Tractors. Clearance has been added behind the drive coupling. The additional clearance improves the flywheel in the following ways: less heat transfer, more airflow around the coupling and less fretting of the drive coupling. This change should extend the life of the drive coupling in high torque and high ambient conditions.Adaptable To: The 163-0424 Flywheel replaces the 102-2887 Flywheel. The 163-0424 Flywheel is effective with Challenger 65E (S/N: 6GS645; 1GM219), Challenger 75E (S/N: 6HS647; 1HM313), Challenger 85E (S/N: 6JS670; 1NM232), and Challenger 95E (S/N: 6KS987; 1SM290) Agricultural Tractors. The improved flywheel can be retrofitted to all earlier machines that are listed above. The 0R-7759 Flywheel remanufactured part is also available.Note: If a failure of the drive coupling occurs, the flywheel should be updated to the design with the improved profile. In addition, alignment of the driveline should be checked. The alignment can be visually checked by bolting up the drive shaft to the drive coupling. Then check the alignment of one bolt hole on the drive shaft coupling to the bolt hole on the coupling on the transmission. The bolt hole centers should be within an axial distance of 6 mm (0.24 inch). In order to adjust the alignment, loosen the engine mounts or transmission mounts, if necessary. In some cases, you may need to use fabricated shims to shim the frame mounting surface for proper alignment of the driveline to the correct specifications.