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TROUBLESHOOTING
PROPORTIONAL CONTROL SOLENOID VALVE
“4. Disassembly and assembly, Proportional control solenoid valve”
Symptoms Major causes Remedies
Solenoid valve does not operate •
Wiring short-circuit or wire break • Replace.
• Coil assembly short-circuit or wire break • Replace.
• Catching of foreign matter by the spool • Overhaul and repair or replace.
• Damage on the outer circumference of
the spool
•
Overhaul and repair or replace.
• Defective proportional controller • Repair or replace.
• Primary pressure is insufficient • Keep the primary pressure.
Oil leakage from solenoid valve • Damaged O-ring • Replace.
• Damaged seal nut • Replace.
PROPORTIONAL CONTROL SOLENOID VALVE
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