Gehl SL3640E, Operator'S Manual, Page: 67 / 88

917334/BP0310 63
Hydraulic System
Problem Possible Cause Remedy
Lift/Tilt controls
fail to respond.
Hydraulic oil viscosity is too
heavy. Allow longer warm-up or
replace with proper viscosity
oil.
Hydraulic oil level is low. Check oil level in reservoir. If
oil is low, check for an
external leak. Repair and
add oil.
Solenoid valve(s)
malfunctioning. Check electrical connections
to lift solenoid and repair.
Restraint bar or seat switch
malfunction. Check switches.
Auxiliary hydraulics
do not function.
Restraint bar is raised. Lower the restraint bar.
Lock solenoid malfunctioning Check electrical connections
to lock solenoid and repair
connections as needed. If
lock solenoid is still not
functioning properly, contact
your dealer.
Restraint bar switch
malfunctioning. Check electrical connections
to restraint bar switch and
repair connections as
needed. If switch is still not
functioning properly, contact
your dealer.
Hydraulic cylinder
action is slow for lift
and/or tilt functions.
Low engine speed. Operate engine at higher
speed.
Hydraulic oil viscosity is too
heavy. Allow longer warm-up or
replace existing oil with
proper viscosity oil.
Control linkage is restricted. Check for control linkage
restriction and adjust.
Hydraulic oil leaking past
cylinder piston seals. Contact your dealer.
Worn gear pump. Contact your dealer.
Solenoid valve(s) could be
malfunctioning. Check electrical connections
to lift solenoid and repair
connections as needed. If lift
solenoid valve is still not
functioning properly, contact
your dealer.
Relief valve in control valve
not functioning correctly.
(Squealing noise should be
evident while operating.) Contact your dealer.