SEAL-SHAFT 1941983 - Caterpillar

Remove & Install Air Starting Motor
1. Close the air pressure supply and drain the air pressure from the system. 2. Disconnect the air lines from air starting motor (1).3. Fasten a hoist to air starting motor (1). Remove bolts (2) and remove the air starting motor from the flywheel housing. The weight of air starting motor (1) is approximately 54 kg (120 lb). The following steps are for the installation of the air starting motor.4. Fasten a hoist to air starting motor (1) and put it and the gasket in position. Install bolts (2) that hold the air starting motor to the flywheel housing.5. Connect the air lines to air starting motor (1) and open the air pressure supply to the system. Disassemble Air Starting Motor
Start By:a. remove air starting motor Make sure there is a complete set of new gaskets, vanes, seals and O-ring seals before the air starting motor is disassembled. 1. Remove elbow (1) from cover assembly (2).2. Remove silencer group (4) from motor housing (3). 3. Make marks to show the position of motor housing (3) in relation to gear case (7) for assembly purposes. Remove bolts (5) to remove gear case (7) and drive housing (6) as a unit from motor housing (3). 4. Use Tool (A) to remove ring (9) from drive gear (8). This air starting motor is a right hand model and bolt (10) has left hand threads. The bolt for a left hand model air starting motor has right hand threads. 5. Remove bolt (10) and washer (11) to remove drive pinion (12), a sleeve and spring from the end of the drive shaft.6. Make marks to show the position of drive housing (6) in relation to gear case (7) for assembly purposes. Remove bolts (13) and remove drive housing (6) from gear case (7). 7. Remove O-ring seal (14) from drive housing (6).
The drive shaft assembly, the piston and drive gear are under a spring force.
8. Install Tooling (B) between drive gear (8) and piston (15). Use a press to make a compression of the piston return spring and remove the ring that holds the drive shaft assembly and piston in the drive housing. 9. Slowly release the press to remove the force of piston return spring (17). Remove Tooling (B) from between the drive gear and piston and remove ring (16) from the piston. Remove the drive gear, the piston and drive shaft assembly as a unit from the drive housing. Remove piston return spring (17) from the drive housing. 10. Use a (5/16 in) hex wrench to loosen the drive gear bolt until the threads are free and remove drive shaft assembly (18) and piston (15) as a unit from drive gear (8). 11. Remove bulkhead (19) from piston (15). 12. Remove O-ring seals (20) from bulkhead (19). 13. Remove ring (21) from piston (15) and remove the piston from drive shaft assembly (18). Later model air starting motors will not have bumper (23). 14. Remove