11
4
CONTROL VALVE
DISASSEMBLY AND ASSEMBLY
4J0AX00CONTROL VALVE
Pilot operated section
1. Remove the cap screws and cover (1), and then re-
move the O-ring from the cover (1).
Cap screw: 7.3 N·m (5.4 ft-lb.)
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 from the cover.
Cap screw: 7.3 N·m (5.4 ft-lb.)
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 from the housing.
• Donotfurtherdisassembletheanti-driftvalve.
Cap screw: 9.3 N·m (6.9 ft-lb.)
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 from the cover (1).
Cap screw: 7.3 N·m (5.4 ft-lb.)
2. Remove the cap screws and cover (3), and then re-
move the O-ring from the cover (3).
Cap screw: 7.3 N·m (5.4 ft-lb.)
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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