Malfunctions in driving mode
7.7 Troubleshooting
7 - 28 3 112 993 en Operating manual GMK 6400
12.07.2013
Engine does not
start –
Starter turns
Batteries insufficiently charged Charge the batteries;
à Maintenance manual
Fuel tank empty 1. Refuel;
à p. 4 - 8
2. Bleed the fuel system;
à Maintenance manual
à Separate engine manufac-
turer’s operating manual
Air intake inhibitor closed à Releasing the air intake inhibi-
tor
, p. 4 - 27
Fuse F4/6 on carrier blown Replace blown fuse;
à p. 7 - 20
The truck crane
cannot exceed
20 km/h (12 mph)
A locking procedure is not yet
completed
Lock the differential locks or
steering
Coolant tempera-
ture too high
Coolant level too low Top up coolant;
à Maintenance
manual
Oil level in the transmission too
low
Check the oil level;
à Maintenance manual
Outer surface of heat
exchanger dirty
Clean the heat exchanger
V-belt of coolant pump at
engine loose
Tighten V-belt;
à Separate engine manufac-
turer’s operating manual
The fan wheel on the engine
does not turn
Switch the fan wheel to emer-
gency operation;
à p. 7 - 39
Engine cannot be
turned off with
ignition key
Malfunction in the electronics Turn off the engine with
theemergency-stop device;
à p. 7 - 1
Motor brake
(engine retarder)
cannot be
switched on
Fuse F4/1 on carrier blown Replace blown fuse;
à p. 7 - 20
Engine/transmis-
sion diagnostics
plug not working
Fuses F1/2, F4/7 blown Replace blown fuse;
à p. 7 - 20
The engine per-
formance is
reduced
The coolant is too hot or
another malfunction.
The engine is not switched off
in order to drive on to the next
place where it is possible to
stop
Coolant too hot:
Wait until the coolant has
cooled down – the performance
will increase again
Other malfunctions:
Manitowoc Crane Care must be
notified
Malfunction Cause Solution