Hydraulic System Troubleshooting - Husqvarna Wacker Neuson CRT60-74LX Operator's Manual

Troubleshooting
8.2

Hydraulic System Troubleshooting

Problem
Blades do not
rotate
Steering system
responds slowly
or not at all
Pitch function
responds slowly
or not at all
Cause Remedy
Pedal signal incorrect, Refer to the separate Repair Manual for
or not present detailed instructions on servicing and
repairing the machine.
Controller signal Refer to the separate Repair Manual for
incorrect, or not detailed instructions on servicing and
present repairing the machine.
Insufficient auxiliary Refer to the separate Repair Manual for
pressure (hydro pump detailed instructions on servicing and
control source repairing the machine.
pressure)
Contamination in Verify system pressure.
servo piston
■
Contamination in
■
control cartridge
Excessive machine
■
load
If system pressure exists:
■
■
■
If system pressure does not exist:
■
Blade rotation Allow machine to idle and warm up.
disabled due to cold
hydraulic oil
Controller signal Refer to the separate Repair Manual for
incorrect, or not detailed instructions on servicing and
present repairing the machine.
Controller error code
■
exists
■
Insufficient auxiliary Refer to the separate Repair Manual for
pressure (Steering detailed instructions on servicing and
control source repairing the machine.
pressure)
Control cartridge Refer to the separate Repair Manual for
signal incorrect or not detailed instructions on servicing and
present repairing the machine.
Insufficient auxiliary Refer to the separate Repair Manual for
pressure detailed instructions on servicing and
(Pitch cylinder repairing the machine.
pressure)
88
CRT60-74LX
Start engine, set engine speed to high
idle, and set pedal at full travel.
Check system pressure at left and right
motor closed loop gauge ports.
Maximum system pressure is 5400 psi.
Blades are excessively overloaded.
Lower unit motors may have failed.
Contact Wacker Neuson Service.
Hydro pumps may have failed.
Contact Wacker Neuson Service.
If no error code exists, check wiring and
connector integrity.
Contact Wacker Neuson Service for
assistance.
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