Malfunctions in driving mode
8.5 Emergency operation and breakdown assistance
Operating manual 3 302 690 en 8 - 39
GMK4100L-1
23.11.2017
8.5.6 Emergency operation, steering 3rd axle line
If there is a warning message in the steering system – lamp (1) lights and
symbol (2) is red – the steering of the 3rd axle line is will be locked. The
3rd axle line can then no longer be steered from the driver's cab or from
the crane cab.
In this case, you can steer the wheels of the 3rd axle line with the emergency
operation to the straight running position in order to enable a drive to the
workshop.
Operating elements
• If need be, lift the counterweight from the
rear counterweight platform.
• Remove the cover (1).
• Fasten the covering (1) after the emergency
operation.
Performing
emergency
operation
If the current situation allows it, you can slightly lift the mobile crane with
the support to relieve the 3rd axle line.
For the operation, you must
– Take out two fuses.
– Switch on the continuous operation at the check valves.
– Steer the 3rd axle line into the straight running position.
– Switch off the continuous operation at the check valves.
– Insert two fuses.
s
2 Check valve
3 Valve for the operation
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