Malfunctions during crane operation
14.4 Troubleshooting
14 - 20 3 112 993 en Operating manual GMK 6400
12.07.2013
14.4.8 Malfunctions in the hydraulic system/hydraulic oil cooler
14.4.9 Malfunctions when inclining the crane cab
14.4.10 Malfunctions when operating with the hand-held control
Malfunction Cause Solution
Hydraulic oil temperature
above 80°C (176°F), fan in the
hydraulic oil cooler running
Hydraulic system is under
extreme strain
Stop the crane operation and
keep the engine running until
the oil has cooled down
Hydraulic oil temperature
above 80°C (176°F), fan in the
hydraulic oil cooler not run-
ning
Fuse F1/7, F1/8 blown. Stop crane operation and
replace blown fuse;
à p. 14 - 6
Faulty temperature sensor in
the circuit of the hydraulic
system, error message is dis-
played
Have the temperature sensor
replaced
Symbol
g is red Corresponding hydraulic oil
filter soiled
Change hydraulic oil filter;
à Maintenance manual
Malfunction Cause Solution
Crane cab inclination function
not working
Fuse F1/1, F1/7 blown Replace blown fuse;
à p. 14 - 6
Mega Wing Lift in rigging
position
End rigging;
à Separate oper-
ating manual
Malfunction Cause Solution
CAN lamp flashes or stays off
after connecting the hand-
held control
A bridging plug is not inserted
in another socket
Insert bridging plug;
à p. 12 - 22
Fuse F2/6 blown Replace blown fuse;
à p. 14 - 6
Motor will not start Ignition in the driver's cab
switched on
Switch off the ignition in the
driver's cab;
à p. 4 - 25
Pre-selected function cannot
be performed
Another function has been
pre-selected
Pre-select the desired function
Operation not possible Malfunction in the control sys-
tem
Manitowoc Crane Care must
be notified
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