Hydrostatic System
Problem
Possible Cause
Remedy
Hydrostatic (drive)
system is noisy.
Hydraulic oil viscosity is too
heavy.
Air in hydraulic system.
Drive motor(s) or hydrostatic
pump(s) have internal
damage or leakage.
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.
Right side doesn’t
drive in either
direction. Left side
operates normally.
Rear hydrostatic pump arm
control shaft key missing.
Relief valves on rear
hydrostatic pump
malfunctioning.
Control rod linkage to rear
hydrostatic pump
disconnected.
Contact your dealer.
Contact your dealer.
Attach control rod linkage.
Right side doesn’t
drive in forward
direction.
Relief valve on rear
hydrostatic pump is
malfunctioning.
Rear hydrostatic pump
malfunctioning.
Contact your dealer.
Contact your dealer.
Left side doesn’t
drive in either
direction. Right
side operates
normally.
Key missing on front
hydrostatic pump arm control
shaft.
Relief valves on front
hydrostatic pump
malfunctioning.
Control rod linkage to front
hydrostatic pump
disconnected.
Contact your dealer.
Contact your dealer.
Attach control rod linkage.
Left side doesn’t
drive in one
direction.
Relief valve on front
hydrostatic pump is
malfunctioning.
Front hydrostatic pump
malfunctioning.
Contact your dealer.
Contact your dealer.
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908268/BP0904
Summary of Contents for SL3635
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Page 69: ...Maintenance Log Date Hours Service Procedure 908268 BP0904 66...
Page 70: ...Maintenance Log Date Hours Service Procedure 67 908268 BP0904...