Hydraulics — Work Hydraulics Troubleshooting Problem
Possible Cause
Corrective Action
Lift and/or tilt functions too slow, inconsistent or jerky.
Low engine speed.
Increase engine speed.
Hydraulic oil level is too low.
Add hydraulic oil; check for leaks. See “Checking Hydraulic Oil Level” on page 29.
Oil leaking past cylinder piston seals.
See “Work Cylinder Leakage Test” on page 124. Repair/ replace cylinder if required. Also see “Hydraulic Cylinder Disassembly/Assembly” on page 141.
Hydraulic pump malfunction.
Repair/replace hydraulic pump. Refer to flowcharts on page 115 for more detailed hydraulic pump troubleshooting.
Oil leading past lift cylinder seals.
See “Work Cylinder Leakage Test” on page 124. Repair/ replace cylinder if required. Also see “Hydraulic Cylinder Disassembly/Assembly” on page 141.
Oil leaking past lift spool in control valve.
Repair/replace control valve. See “2-Spool Control Valve Removal” on page 126 or “3Spool Control Valve Removal” on page 128. Also refer to the parts manual for control valve parts information.
Leaking hydraulic hoses, tubes or fittings between control valve and cylinders.
Repair/replace as required.
Spool in control valve not actuated or leaking.
Repair/replace control valve. See “2-Spool Control Valve Removal” on page 126 or “3Spool Control Valve Removal” on page 128. Also refer to the parts manual for control valve parts information.
Hydraulic oil leaking past seals.
Repair/replace as required.
Lift arm does not maintain raised position with multi-purpose joystick centered (neutral).
Auxiliary hydraulics do not function.
PRINTED IN U.S.A.
105
50940008/AP0311
