Gehl SL7600 Operator's Manual page 70

Hydrostatic System
Problem Possible Cause
Hydraulic oil viscosity is
too heavy.
Air in hydraulic system.
Hydrostatic (drive)
system is noisy.
Drive motor(s) or
hydrostatic pump(s) have
internal damage or
leakage.
Rear hydrostatic pump
arm control lever loose.
Left side doesn't
Relief valves on rear
drive in either
hydrostatic pump
direction. Right
malfunctioning.
side operates
Control rod linkage to rear
normally.
hydrostatic pump
disconnected.
Relief valve on rear
hydrostatic pump is
Left side doesn't
malfunctioning.
drive in forward
direction.
Rear hydrostatic pump
malfunctioning.
Front hydrostatic pump
arm control lever loose.
Right side doesn't Relief valves on front
drive in either hydrostatic pump
direction. Left side malfunctioning.
operates normally.
Control rod linkage to
front hydrostatic pump
disconnected.
Relief valve on front
hydrostatic pump is
Right side doesn't
malfunctioning.
drive in one
direction.
Front hydrostatic pump
malfunctioning.
67
Remedy
Allow longer warm-up or replace
existing oil with the proper
viscosity oil.
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.
Contact your dealer.
Tighten.
Contact your dealer.
Attach control rod linkage.
Contact your dealer.
Contact your dealer.
Tighten.
Contact your dealer.
Attach control rod linkage.
Contact your dealer.
Contact your dealer.
908274/BP1202