HOUSING-FAN DRIVE 3261877 - Caterpillar

Start By:a. remove attachment pump. 1. Remove plug (1) and the needle valve.2. Remove four cap screws (2) and valve assembly (3). 3. Remove three seals (4). Remove plug (5) and disassemble the valve. Measure the distance from the body to the end of socket setscrew (13) before removal. Spool (6) has three balance grooves.4. Remove locknut seal (12) and socket setscrew (13) if necessary.5. Remove O-ring (11), spring guide (10), spring (9), spring stop pin (8), spring guide (7) and spool (6) from valve assembly (3). Measure the distance from the body to the end of socket setscrew (21) before removal. Spool (15) has three balance grooves.6. Remove locknut seal (20) and socket setscrew (21) if necessary.7. Remove O-ring (19), spring guide (18), spring (17), spring guide (16) and cutoff spool (15) from valve assembly (3). 8. Remove six bolts (22) and head assembly (23). Heat the head to 121°C (250°F) to remove rod (26) and (27).9. Remove pin (25) and bearing cup (24) if necessary.10. Remove rod (26) and (27) if necessary. 11. Remove gasket (28), coupler (29) and plate (30).12. Remove spring (31) and piston (32). Remove piston (33).
Exploded view of spring (31), piston (33), coupler (29), plate (30) and piston (32). 13. Remove three bolts (34) and cover (35). 14. Remove plug (36). 15. Check the condition of O-ring seal (37) on plug (36) and O-ring seal (38) on cover (35). 16. Remove two allen bolts (39) on each side.17. Remove bearing (40) and spacer (41) on each side. Remove bearing (42) and shim under bearing (42). 18. Mark a piston and the barrel assembly so the pistons can be returned to the same location.19. Remove barrel (43), pistons (44) and guide ring (45).
Exploded view of retaining ring (49), washer (48), spring (47) and washer (46) from barrel (43).20. Remove the pistons (44) and the guide ring (45) from the barrel (43).21. Use