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SJ2000-OMM0001
TROUBLESHOOTING
Leakage
Air leaks through exhaust
port of main valve
Air leaks through pilot
exhaust port of pilot valve
Foreign matter caught in core of pilot valve
④
⑨
⑤
⑥
⑩
④
Foreign matter caught in air seat of pilot valve
Foreign matter caught in core of pilot valve
Air leaks through gasket
Insufficient bolt tightening
Foreign matter caught in armature
Coil splashed by water
Burnt coil
Intrusion of foreign matter
Spool has not completely shifted
Foreign matter caught in air seat of pilot valve
①
②
③
④
Excessive amount of lubricant
Higher voltage or wrong coil used
⑦
⑤
⑥
Faulty wiring
Poor contact at contactor wire or connection part
Blown fuse or disconnection lead wire
Poor seal on actuator (cylinders, etc.) side
Faulty operation
Pilot valve is not operated
Though pilot valve does
shift, but main valve will not
shift or will be sluggish.
Disconnection coil wire
⑪
Should any trouble be found during operation, trace the source of the trouble in the following order and take corrective action.
Trouble phenomenon
Cause expected
Remedy
⑧
Fall of pilot pressure
Swelled out " spool ass'y " ring
Abrasion "spool ass'y" ring
⑫