Troubleshooting
Printed in U.S.A. 169 50940411/G0219
Hydrostatic Travel Drive System Troubleshooting
Lift and/or tilt functions inconsistent/jerky
Air in hydraulic system
Cycle lift and tilt cylinders to maximum
stroke and maintain for a few seconds to
clear air from the hydraulic system
Low hydraulic oil level
Top-off hydraulic oil. See “Checking
Hydraulic Oil Level” on page 138
Cylinder(s) malfunction Contact dealer
Joystick/electrical malfunction code
displayed
See “Error Codes” on page 172
Lift arm does not maintain position with
control joysticks in neutral
Hydraulic oil leaking past cylinder seals
(external leak)
Contact dealer
Hydraulic oil leaking past lift spool in
control valve
Contact dealer
Leaking hydraulic hoses, tubes of fittings
between control valve and cylinders
Contact dealer
Auxiliary hydraulics not functioning
Spool in control valve not actuated or
leaking
Contact dealer
Hydraulic oil leaking past seals Contact dealer
Auxiliary hydraulics connected
improperly
Correct hydraulic connections
Table 51: Hydrostatic Travel Drive System Troubleshooting
Problem Possible Cause Corrective Action
Hydrostatic drive and lift/tilt not responsive
Hydraulic oil viscosity too heavy
Allow longer warm-up
Replace hydraulic oil with proper type/
grade. See “Fluids/Lubricants Types and
Capacities” on page 35
Control system malfunction with error
code displayed
See “Error Codes” on page 172
Drive does not operate in either direction
Parking brake applied
Disengage parking brake. See
“Disengage Parking Brake” on page 74
Low hydraulic oil level
Top-off hydraulic oil. See “Checking
Hydraulic Oil Level” on page 138
Low or no charge pressure Contact dealer
Hydrostatic pump(s) relief valves
malfunction
Contact dealer
Control system malfunction with error
code displayed
See “Error Codes” on page 172
Table 50: Hydraulic System Troubleshooting
Problem Possible Cause Corrective Action
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