Driving modes and rigging for on-road driving
6.3 Removing/installing main boom
Operating manual GMK 6400 3 112 993 en 6 - 21
12.07.2013
6.3.4 Retracting/fitting the derricking cylinder head pin
The derricking cylinder head axle is retracted and fitted with a pulling
device.
Derricking
cylinder support
Before retracting the head pin, the derricking cylinder support must be
erected.
• Place the derricking cylinder support (1)
between the holders (2)
• Set down the main boom on the boom rest
Operating the
lifting device
A lifting device is needed in order to relieve and level the derricking cylinder.
• Attach the lever in the holder (2)
(A) – Raising
• Close the drain plug (1) and pump the lever.
The piston rod (3) extends
(B) – Lowering
• Slowly open the drain screw (1).
The piston rod (3) retracts
s
S
Danger from using unsuitable lifting device
Have the lifting device serviced in time before the maintenance interval
specified on the label expires.
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