Gehl R190 - Hydraulic System Malfunctions

98 50950106/AP0313
Hydrostatic Drive System
Problem Possible Cause Remedy
No response from
either hydrostatic
drive or the lift/tilt
systems.
Hydraulic oil viscosity too
heavy.
Allow longer warm-up or
replace oil with proper
viscosity oil.
Hydraulic oil too low. Check for low oil level in
reservoir, add oil.
Drive coupling failure. Replace coupling.
Traction drive will not
operate in either
direction.
Parking brake is engaged. Disengage parking brake.
Hydraulic oil level low. Check for low oil level in
reservoir, add oil.
Low or no charge pressure. Contact your dealer.
Hydrostatic pump(s) relief
valves malfunctioning.
Restraint bar raised.
Restraint bar or seat switch
malfunctioning.
Contact your dealer.
Lower restraint bar.
Contact your dealer.
Sluggish
acceleration.
Air in hydraulic system. Cycle lift and tilt cylinders to
maximum stroke and
maintain pressure for short
time to clear air from system.
Also check for low oil level in
reservoir, fill as needed.
Hydraulic oil level too low. Check for low oil level in
reservoir, add oil.
Hydrostatic system charge
pressure low.
Contact your dealer.
Drive motor(s) or hydrostatic
pump(s) have internal
damage or leakage.
Contact your dealer.
Hydrostatic drive
overheating.
Drive system overloaded
continuously.
Improve efficiency of
operation.
Lift/tilt or auxiliary system
overloaded continuously.
Improve efficiency of
operation.
Drive motor(s) or hydrostatic
pump(s) have internal
damage or leakage.
Contact your dealer.
Oil cooler fins plugged with
debris.
Clean oil cooler fins.
Hydrostatic oil filter plugged
or restricted.
Replace filter.
Loader being operated in
high temperatures with no air
circulation.
Reduce duty cycle; improve
air circulation.