UPPERSTRUCTURE / Pump Device Disassemble Main Pump Remove Drive Gear 1. Remove retaining ring (1) from drive disc (49). 2. Remove drive gear (2) from drive disc (49). CAUTION: Main pump weight: 67 kg (148 lb) 3. Secure the main pump on the workbench (ST 5050). 4. Remove bolts (5) (4 used) and spring washers (6) (4 used) from regulator (4). Remove regulator (4) from casing (11). : 8 mm 5. Remove O-rings (12) (5 used), (3) and spring pins (13) (2 used) from casing (11). 6. Remove bolts (39) (8 used) and spring washers (40) (8 used). Remove head cover (31) from casing (11). : 10 mm 7. Remove O-rings (12) (3 used) from casing (11). 8. Place valve plate (45) on casing (11). 9.
Remove cylinder block (46) upward and remove valve plate (45) and the link (27) assembly. 10. Remove spring (47) from center shaft (48). W2-4-23