TROUBLESHOOTING
11-5
Problem Cause Solution
Only one actuator is inoperable. Broken control valve spool * Replace
Embedded foreign matter in valve spool * Repair or replace
Broken pipe and/or hose * Repair or replace
Loose pipe line joint Retighten
Broken O-ring at pipe line joint * Replace
Broken actuator * Repair or replace
Faulty pilot valve * Replace
Faulty pilot circuit line * Repair or replace
Faulty pilot solenoid valve * Repair or replace
Only one cylinder is inoperable or has
no power.
Broken oil seal in cylinder * Repair or replace
Oil leak due to damage to cylinder rod * Repair or replace
Faulty pilot valve * Replace
Faulty pilot circuit line * Repair or replace
Faulty pilot solenoid valve * Repair or replace
Hydraulic oil temperature increases. Stained oil cooler Clean
Insufficient engine fan belt tension Adjust
Insufficient rotation speed of hydraulically
driven fan
* Repair or replace
Oil leak from low pressure hose. Loose clamps Retighten
Faulty suction manifold * Repair or replace
Items with * mark: Consult your authorized dealer.
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