Husqvarna DXR250 Operator's Manual page 71

An individual function is
running slowly.
An individual function is not
working.
The machine sinks on the
outriggers.
Jerky arm movements.
Cylinder sinks*.
Overheating in the hydraulic
system.
Knocking noise in the
hydraulic system.
Discolored hydraulic fluid.
* If cylinder 3 and 4 slowly sink (approx. 1 cm/min) this is entirely normal as they do not have any counter balance valves.
TROUBLESHOOTING
Internal leakage in the cylinder.
Restriction in a hydraulic hose.
Fault in the pilot control valve.
Joystick in an operative position when
starting the remote control.
Fault in the pilot control valve or the
spool in the valve i stuck or damaged.
Leaking check valves in outrigger
cylinders.
The hydraulic fluid has been heated up
in a cold machine.
A slide valve is seizing due to
contamination.
Air in the pilot control valve.
Broken O-rings in the pilot control
valves.
Fault in the pilot pressure circuit.
Contamination in the hydraulic system.
Leakage in the cylinder.
Defective valve.
Faulty counter balance valve.
Cooler blocked or obstructed.
Too high ambient temperature.
Maximum pressure or standby pressure
set too high in the pump.
Defective hose or coupling.
Restriction in main pipe or pipe to tool. Replace faulty component.
Power extraction too high due to faulty
or unsuitable tool.
Defective hydraulic pump.
Not enough hydraulic fluid in the tank.
Air in the hydraulic fluid.
Defective hydraulic pump.
Cloudy grey fluid indicates water in the
system.
Black fluid indicates carbon formation
due to too high operating temperature.
Extend the cylinder to end position without any load
and check the pump pressure on the display. The
sealing in the cylinder is OK if maximum pressure is
obtained.
Run an unloaded cylinder. Check the pump pressure
on the display. If you receive max. pressure but not full
speed on the cylinder, this indicates a strangulation in
the hydraulic hose.
Contact your service agent.
Restart the remote control with the joystick in neutral
position.
Contact your service agent.
Contact your service agent.
Warm up the machine.
Contact your service agent.
Contact your service agent.
Contact your service agent.
Contact your service agent.
Investigate any leaks there might be. Change
hydraulic fluid and oil filter.
Locate the leak and replace any components that
might be damaged.
Contact your service agent.
Contact your service agent.
Clean the cooler
Use forced cooling.
Contact your service agent.
Replace faulty component.
Check that the tool's pressure and flow are compatible
with the machine's specification.
Contact your service agent.
Stop the motor at once. Investigate and rectify any
leaks there might be. Replenish hydraulic fluid.
Run the machine without a load until air and fluid have
separated.
Contact your service agent.
Investigate and rectify the cause of water entering.
Change hydraulic fluid and oil filter.
Investigate and rectify the cause of overheating.
Change hydraulic fluid and oil filter.
English – 71