UPPERSTRUCTURE / Control Valve Disassemble Control Valve 5-Spool Side Disassemble Spool 1. Remove socket bolts (52) (6 used). Remove cap (55) and O-rings (51) (5 used) from housing (1). 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.) 7. Remove overload relief valve (19) from housing (1). : 8 mm 2. Put the matching marks on spools (41, 45, 46, 45, 46, 47, 50) assemblies from housing (1). Disassemble Arm Anti-Drift Valve 3. Remove plug (36) from body (32). 47, 50) and housing (1).
Remove the spool (41, : 32 mm Disassemble Main Relief Valve IMPORTANT: Do not disassemble the main relief valve. If the main relief valve is disassembled, pressure must be adjusted. (Refer to the Operational Performance Test section / TROUBLESHOOTING in the separated volume, T/M.) 8. Remove main relief valve (17) from body (1). : 38 mm 4. Remove socket bolts (8) (3 used). Remove the body (32) assembly, O-rings (21, 31) and (20) (4 used) from housing (1). : 8 mm 5. Remove piston (34) and spring (33) from body (32). : 38 mm 6. Remove spool (30), sleeve (29), poppet (24), seat (23) and spring (22) from housing (1). Remove backup rings (25, 28) and O-rings (26, 27) from sleeve (29). :
32 mm Disassemble Check valve 9. Remove spacer (40), spring (38) and poppet (37) from housing (1). Remove backup ring (28) and O-ring (39) from spacer (40). 10. Remove socket bolts (8) (2 used). Remove flange (7), O-ring (6), spring (5) and poppet (4) from housing (1). : 8 mm 11. Remove socket bolts (8) (2 used). Remove flange (7), O-ring (13), spring (12) and poppet (11) from housing (1). : 8 mm W2-5-39