Gehl SL3640E, Operator'S Manual, Page: 64 / 88

60 917334/BP0310
Hydrostatic System
Problem Possible Cause Remedy
No response from
either hydrostatic
drive or the lift/tilt
systems.
Hydraulic oil viscosity is too
heavy. Allow longer warm-up or
replace existing oil with the
proper viscosity oil.
Hydraulic oil supply is too
low. Check for low oil level in
reservoir. Add oil.
Drive coupling failure. Replace the coupling.
Traction drive will
not operate in either
direction.
Parking brake is engaged. Disengage parking brake.
Hydraulic oil supply is low. Check for low oil level in
reservoir. Add oil.
Control rod linkage
disconnected. Check linkage connection at
control levers and neutral
centering mechanisms.
Reconnect linkage.
Low or no charge pressure. Contact your dealer.
Hydrostatic pump(s) relief
valves are malfunctioning. Contact your dealer.
Sluggish response
to acceleration.
Air in hydraulic system. Cycle lift and tilt cylinders to
maximum stroke and
maintain pressure for a short
time to clear air from system.
Also check for low oil level in
reservoir, fill as needed.
Automatic parking brake
partially engaged. Contact your dealer.
Hydraulic oil supply is too
low. Check for low oil level in
reservoir. Add oil.
Low hydrostatic system
charge pressure. Contact your dealer.
Drive motor(s) or hydrostatic
pump(s) have internal
damage or leakage. Contact your dealer.