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Operating instructions
149 443 143
C 4.74
Troubleshooting guide
Problem Cause Remedy
Hydraulic oil heats too quickly, system
works against excess pressure.
(engine under load)
Cylinder at limit stop
Implement not connected but
joystick in work position (quick
coupling)
Put joystick in neutral position
(free circulation)
Put joystick in neutral position
(free circulation)
Hydraulic oil foams Leaks in suction area Check all pipe connections and
tighten, if required
Hydraulic system working too slowly,
accompanied by whistling noise
Hydraulic oil level too low
Temperatures too low
Fill up as specified
Fill proper type of oil as specified in
maintenance instructions
Steering not working Proportional valve dirty
Relief valve in hydraulic steering not
closing
Clean proportional valve (installed
on right side of body)
Remove and clean (authorized
workshop)
Lost steering motion when steering
direction is changed rapidly
Leaks in steering return line Check hose couplings for leaks