English – 71
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
running slowly.
Internal leakage in the cylinder.
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.
Restriction in a hydraulic hose.
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.
Fault in the pilot control valve.
Contact your service agent.
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.
Discolored 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.
Summary of Contents for DXR-310
Page 75: ...English 75 TECHNICAL DATA Range and transport diagram DXR250 4483 176 5 2020 79 5 4815 189 5 ...
Page 77: ...English 77 TECHNICAL DATA DXR270 4483 176 1986 78 4849 191 1435 56 ...
Page 79: ...English 79 TECHNICAL DATA DXR300 4868 192 2368 93 5231 206 1818 72 ...
Page 81: ...English 81 TECHNICAL DATA DXR310 5182 204 2129 84 2678 105 5549 218 ...
Page 84: ...1158619 27 z Z 78 z Z 78 2016 12 19 US Original instructions ...