Maintenance and Care

Faults and fault rectification
Boom will not move. Steering switch turned on. Turn off steering switch.
Shut-down valve will not switch Check shut-down valve.
No pilot pressure. Clean supply pressure filter.
Changeover valve will not Electric solenoid valve will not switch. Check electric solenoid valve and ensure power supply
switch.
Valve piston jams (clogged). Remove changeover valve, strip down and clean.
Valve corroded. Replace valve.
Working pressure too low. Leak in system. Fix leak.
Working pump oil level too low. Ensure oil supply.
Working pump sucks in air. Check intake line for leaks.
No LS signal Measure LS pressure. Rectify LS pressure lost.
Working pump does not swivel out. Check power supply at working pump; disconnect cable from
pump control (pure hydraulic control).
Pressure limiting valve will not close. Remove pressure limiting valve, replace if necessary.
Machine slow to move. Pilot pressure too low. Clean supply pressure filter.
No LS signal Measure LS pressure. Rectify LS pressure lost.
Hydraulic oil temperature Radiator clogged. Clean radiator.
gets too warm.
Hydraulic oil too low. Top up hydraulic oil.
Radiator fan turns too slow Check speed and if too low disconnect electric cable from the
fan control (full speed).
Excessive consumption, possibly from additional
equipment.
Reduce consumption.
Incorrect operation. Adapt operation.
Temperature sensor or cable defective. Check temperature sensor cable and replace temperature sensor.
Machine performance drops. Machine overheats. Reduce load, clean radiator and check cooling liquids.
Engine output too low. See Trouble Shooting, Engine „Impaired performance“.
Machine not serviced. Carry out maintenance.
Incorrect settings. Have settings checked and adjusted by a specialist dealer.
Certain components worn. Replace worn components.
No message in display. Power supply interrupted. Replace fuse, check connection.
Operation Manual Menzi Muck A81 Page 185