UPPERSTRUCTURE / Control Valve 19. Remove socket bolts (52) (10 used). Remove caps (98) (4 used), (103) and O-rings (51) (5 used) from housing (1). Disassemble Arm Anti-Drift Valve 23. Remove socket bolts (8) (4 used). Remove flange (72), O-rings (20) (3 used), (13), spring (73) and poppet (74) from housing (1). : 8 mm Disassemble Digging Regenerative Valve, Auxiliary Flow Combining Valve 20. Remove socket bolts (91) (4 used). Remove caps (92) (2 used), O-rings (6) (2 used), spring eats (93) (2 used), springs (96, 94) and spools (97, 95) from housing (1). : 8 mm Disassemble Arm 1 Flow Rate Control Valve 24. Loosen plugs (56, 63) from body (104). 25. Remove socket bolts (58) (4 used).
Remove O-rings (20, 13) from housing (1). : 5 mm Disassemble Overload Relief Valve IMPORTANT: Do not disassemble the overload relief valve. If the overload relief valve is disassembled, pressure must be adjusted. (Refer to the Operational Performance Test section / TROUBLESHOOTING in the separated volume, T/M.) 21. Remove overload relief valve (99) from housing (1). : 8 mm 26. Remove plug (63), spring seat (61), spring (60) and spool (59) from body (104). Remove plug (56). 27. Remove sleeve (64), spring (65), plug (66), spring (67) and poppets (68, 69) from housing (1). : 32 mm Disassemble Check Valve 22. Remove socket bolts (8) (2 used).
Remove flange (7), O-ring (6), spring (5) and poppet (83) from housing (1). : 8 mm W2-5-43