Menzi Muck A91 - 9.2 General Machine Troubleshooting

Operation Manual Menzi Muck A91 Page 223
Faults and fault rectification
Entire machine will not move. Diesel engine will not run. Start diesel engine. In the event of a fault, see „Trouble Shooting
Engine“.
Armrest not closed. Close armrest.
Armrest switch inoperable. Check armrest switch, replace as required.
Main fuse / fuses burned out. Check fuses and replace.
No or insufficient hydraulic oil in the system. Top up hydraulic oil. Vent pumps.
No pilot pressure. Clean supply pressure filter.
Diesel engine speed too low Increase speed. When machine is cold or in emergency gas
mode, max. speed is 1450 rpm.
No LS pressure. Measure LS pressure. Check LS pressure lost.
Traction drive inoperable Fully retract traction drive fine control. Run up fine control.
Fuse burned out. Replace fuse.
Control inoperable. Read off fault from display; check connections, replace any
defective parts.
Leak in system. Fix leak.
Brakes do not disengage. Inadequate brake pressure, check BR solenoid valve and power
supply to the support block.
Wheel gear uncoupled. Couple wheel gear.
Traction drive pump does not swivel out. Check release solenoid at traction drive pump.
Actuating the traction drive
increases the engine speed.
Automatic drive activated. Deactivate automatic drive. (Set bucket steering switch to first
position.)
Support will not move. Fuse burned out. Replace fuse.
CAN bus inoperable. Read off fault from display; check connections, replace any
defective parts.
LS solenoid valve on support block will not
switch.
Check solenoid valve and power supply.
Certain solenoid valves on support block will
not switch.
Check solenoid valve and power supply.
No LS pressure. Measure LS pressure. Rectify LS pressure lost.
Bucket will not move. Steering switch to steering. Set steering switch to bucket position. (Switch off)
Changeover valve piston jams (clogged). Remove changeover valve, strip down and clean.
Changeover valve corroded. Replace changeover valve.
Steering inoperable. Steering switch off Turn on steering switch.
Changeover valve will not switch. See „Changeover valve will not switch“.
Changeover valve corroede. Replace changeover valve.
Fuse burned out. Replace fuse.
9.2 General trouble shooting on the machine