GEHL R105 / MUSTANG 1050R
HYDRAULIC SYSTEM
Troubleshooting Guide Problem Lift arm will not raise a heavy load or any load
Possible Cause
Remedy
Lift solenoid malfunctioning
Check electrical connections to solenoid. Repair or replace as needed.
Lift spool in control valve not actuated or leaking
Check valve body for scores or cracks. Replace control valve as needed.
Main relief valve malfunctioning (squealing noise evident while operating)
Check pressures in relief valve. Repair or replace as needed.
Bucket does not level on the lift cycle
Self-leveling valve misadjusted or malfunctioning
Repair or replace self-leveling valve as needed.
Bucket will not tilt; lift arm works properly
Tilt solenoid valve malfunctioning
Check electrical connections to tilt solenoid and repair connections as needed. Replace solenoid as needed.
Tilt spool in control valve not actuated or leaking
Check hose or tube connection to valve. Check pressure and flow.
Control linkage misadjusted
Check linkage; readjust for full spool travel.
Low engine speed
Operate engine at higher speeds.
Hydraulic oil level low
Add oil to reservoir.
Hydraulic oil viscosity too heavy
Allow for longer warm-up period.
Control valve relief pressure low
Check pressure at control valve. Readjust if necessary.
Restraint bar raised
Lower restraint bar
Restraint bar switch or seat switch malfunctioning
Replace malfunctioning switch
Blown fuse or relay
Replace fuse or relay.
Faulty electrical connections
Check electrical connections for security, broken or damaged wires. Replace as needed.
Solenoid valve malfunctioning
Check electrical connections to solenoid. Repair or replace as needed.
Auxiliary hydraulics functions slowly
Auxiliary hydraulics do not function
PRINTED IN USA
50950298/AP0517
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