ENGINE AR-COMPLETE 3243969 - Caterpillar

Be cautious of hot oil when draining the oil from the transmission and when disconnecting any transmission oil lines. Hot oil can cause burns. Stay clear of any oil that may spill during disconnection of transmission oil lines or draining of oil.
1. Drain the transmission oil in a suitable container for storage or disposal. The capacity of the power train system on the 143H and the 163H motor graders is 47 Liters (50 qt). 2. Remove bolts (1), the washers, the bolts (2) and the washers from two guards (3). Remove two guards (3) from the front of the transmission. 3. Remove four bolts (4), the nuts, four bolts (5) and the washers from universal joint group (6). Remove universal joint group (6) from the drive shaft.
Do not disconnect any air line from the machine until all air pressure in the air tank is at zero. Release air pressure from the air tank by loosening the bleed valves. The bleed valves are underneath the rear bumper on the sides of the air tank.
4. Release the air pressure from the air tank.5. Disconnect air line (8) from the parking brake housing.6. Remove bolt (9) and the washer that hold yoke (10) to the transmission shaft.7. Remove yoke (10) and its O-ring seal from the transmission shaft.8. Remove yoke (7) from the differential.9. Remove all but two of bolts (11) from parking brake housing (12). Leave one bolt at the top and one bolt at the bottom of parking brake housing (12). 10. Attach Tooling (A) to parking brake housing (12).11. Remove remaining bolts (11) from parking brake housing (12). Remove parking brake housing (12) from the transmission. 12. Remove plug (13) and O-ring seal (14) from parking brake housing (12).13. Remove plug (15) and O-ring seal (16) from parking brake housing (12). 14. Remove six bolts (19) and the washers from piston (17). Remove piston (17) from parking brake housing (12).15. Remove O-ring seal (18) from parking brake housing (12). 16. Remove plug (20) from piston (17). 17. Turn piston (17) over 180 degrees. Separate piston (21) from piston (17).18. Remove O-ring seal (22) from piston (21). 19. Remove 20 springs (23) and 20 springs (24) from parking brake housing (12). 20. Remove O-ring seal (25) from parking brake housing (12).21. Remove lip seal (26) from parking brake housing (12).22. Remove O-ring seal (27) from parking brake housing (12).23. Remove O-ring seal (28) from parking brake housing (12). 24. Remove six clutch plates (29) and five friction discs (30) from the transmission.25. Remove six reaction dowels (31) from the transmission. 26. Remove clutch hub (32) from the transmission.Install Parking Brake
During the installation of the parking brake, check the condition of all O-ring seals used in the assembly. If any of these seals are damaged, use new parts for replacement. 1. Install clutch hub (32) to the transmission. 2. Install six reaction dowels (31) in the transmission.3. Starting with a clutch plate, install six clutch plates (29) and five friction