LXG520R
Grapple
Troubleshooting
29
9. Troubleshooting
WARNING!
Before troubleshooting, read and understand
the
. Set the
machine to a safe condition.
The following table lists some of the problems that you may
encounter and provides possible causes and solutions.
If you encounter a problem that is difficult to solve, even after
reading this information, please contact your local dealer, the
distributor, or Wallenstein Equipment. Before you call, please
have the serial number for your product handy.
To find the serial number on your machine, see
Problem
Possible Cause
Solution
Hydraulics functions move slowly
or do not move.
No pressurized hydraulic fluid. The filter is
plugged.
Change the filter.
Low hydraulic fluid level.
Add hydraulic fluid, as required.
Hoses are connected incorrectly.
Correct the hose connections.
Low hydraulic fluid flow. Flow control set
too low.
Adjust the hydraulic fluid flow control.
Selector valve is not powered (machines
that require a selector valve kit).
Connect the selector valve solenoid to a 12 VDC electrical power source.
Wrong function is selected.
(machines that require a selector valve kit).
Make sure that the electrical harness is connected to the correct function.
Electrical harness connector is loose or
damaged
(machines that require a selector valve kit).
Check the connection. Inspect the electrical harness for damage. Repair or
replace a damaged electrical harness.
Low excavator engine speed.
Increase the excavator engine speed.
Hydraulic functions are jerky.
Leak in the hydraulic system. Air getting into
the system.
Tighten all hydraulic connections. Check for leaks in the hoses.
Hydraulic hose couplers are dirty or
incompatible.
Clean the hose couplers. Makes sure that the connecting couplers are the
correct type.
Leaking hydraulic hose.
Hydraulic hose is worn, damaged, or a
connector is loose.
Inspect the hose for damage. Replace damaged hydraulic hoses immediately.
Make sure that all the connectors are tight. For specifications, see
Leaking hydraulic cylinder.
Cylinder seals are worn or damaged.
Disassemble and overhaul the cylinder. Check the fluid for debris.
