Husqvarna DXR300, Operator'S Manual

Page: 52 / 60

52 –
English
TROUBLESHOOTING
* If cylinder 3 and 4 slowly sink (approx. 1 cm/min) this is entirely normal as they do not have any counter balance valves.
An individual function is
not working.
Joystick in an operative
position when starting the
remote control.
Restart the remote control with the joystick in neutral position.
Fault in the pilot control
valve or the spool in the
valve i stuck or damaged.
Contact your service agent.
The machine sinks on
the outriggers. Leaking check valves in
outrigger cylinders.
Contact your service agent.
Jerky arm movements.
The hydraulic fluid has
been heated up in a cold
machine.
Warm up the machine.
A slide valve is seizing due
to contamination.
Contact your service agent.
Air in the pilot control valve. Contact your service agent.
Broken O-rings in the pilot
control valves.
Contact your service agent.
Fault in the pilot pressure
circuit.
Contact your service agent.
Cylinder sinks*.
Contamination in the
hydraulic system.
Investigate any leaks there might be. Change hydraulic fluid and oil filter.
Leakage in the cylinder. Locate the leak and replace any components that might be damaged.
Defective valve. Contact your service agent.
Faulty counter balance
valve.
Contact your service agent.
Overheating in the
hydraulic system.
Cooler blocked or
obstructed.
Clean the cooler
Too high ambient
temperature.
Use forced cooling.
Maximum pressure or
standby pressure set too
high in the pump.
Contact your service agent.
Defective hose or coupling. Replace faulty component.
Restriction in main pipe or
pipe to tool.
Replace faulty component.
Power extraction too high
due to faulty or unsuitable
tool.
Check that the tool’s pressure and flow are compatible with the machine’s
specification.
Defective hydraulic pump. Contact your service agent.
Knocking noise in the
hydraulic system.
Not enough hydraulic fluid
in the tank. Stop the motor at once. Investigate and rectify any leaks there might be.
Replenish hydraulic fluid.
Air in the hydraulic fluid. Run the machine without a load until air and fluid have separated.
Defective hydraulic pump. Contact your service agent.
Discoloured hydraulic
fluid.
Cloudy grey fluid indicates
water in the system. Investigate and rectify the cause of water entering. Change hydraulic fluid
and oil filter.
Black fluid indicates carbon
formation due to too high
operating temperature.
Investigate and rectify the cause of overheating. Change hydraulic fluid
and oil filter.