Rigging work
12.3 Rigging work after driving with a dolly
12 - 20 3 302 690 en Operating manual
GMK4100L-1
23.11.2017
12.3.2 Switching off the slewing gear freewheel
If the slewing gear freewheel is switched on, switch it off prior to working
with the crane.
Prerequisites
– The engine for crane operation must be running.
– The slewing gear brake must be released, the lamp (1) must have gone
out;
à Releasing the slewing gear brake, p. 11 - 116
Switching off
• Remove the lock (4) from the bore (1).
• Pull the pin (3) out as far as possible.
• Secure the pin with the padlock in the
bore (2) and remove the key.
• Pull and secure the pin (3) on the other
slewing gear in the same way.
• Close the valve (5) – the slewing gear
freewheel is switched off.
Before slewing Support the truck crane with the necessary outrigger span, enter the corre-
sponding rigging mode and derrick the main boom to an angle permissible
within the working range.
G
Risk of accidents with the slewing gear freewheel switched on
Switch off the slewing gear freewheel before working with the crane.
If it is not switched off, the slewing gear brake will not work and you will be
unable to stop slewing movements in time.
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