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4
CONTROL VALVE
DISASSEMBLY AND ASSEMBLY
Pilot operated section
1. Remove the cap screws and cover (1), and then re-
move the O-ring fr
om the cover (1).
Cap screw: 8.8 to 10.8 N·m
2. Remove the spring holder (2), spring (3) and spring
holder (4).
3. Remove the spool (5) from the housing.
• Make sure to insert the spool in the correct direc-
tion.
Boom section
WARNING
If the anti-drift valve is disassembled with the control
valve still installed, parts may be ejected due to the
internal pressure. Remove it after relieving the internal
pressure by gradually loosening the cap screw.
1. Remove the cap screws and cover (1), and then re-
move the O-ring fr
om the cover.
Cap screw: 8.8 to 10.8 N·m
2. Remove the spring holder (2), spring (3) and spring
holder (4).
3. Take out the cap screws and housing (5), and then re-
move the O-ring fr
om the housing.
• Do not further disassemble the anti-drift valve.
Cap screw: 8.8 to 10.8 N·m
4. Remove the spring holder (2), spring (3) and spring
holder (4).
5. Remove the spool assembly (6) from the housing.
• Make sure to insert the spool in the correct direc-
tion.
Switch valve
1. Remove the cap screws and cover (1), and then re-
move the O-ring fr
om the cover (1).
Cap screw: 8.8 to 10.8 N·m
2. Remove the cap screws and cover (3), and then re-
move the O-ring fr
om the cover (3).
Cap screw: 8.8 to 10.8 N·m
3. Remove the spring holder (4), spring (5) and spring
holder (6).
4. Remove the spool (7) from the housing.
• Be sure to insert the spool in the correct direction.
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