Driving modes and rigging for on-road driving
6.3 Removing/installing main boom
6 - 22 3 112 993 en Operating manual GMK 6400
12.07.2013
Retracting the
derricking cylinder
head axle
After you have pulled the head pin, you can no longer derrick the main
boom.
#
(A) – Releasing the head pin
• Loosen the bolt (3) and remove the disc
(B) – Relieving the head pin
• Place the lifting device (2) underneath the
middle of the derricking cylinder
• Carry out the movement Raise until the
bracket (1) is resting firmly on the derricking
cylinder
Pulling out the head pin
• (A) – Turn the switch (1) to the Pull ä
position
• (B) – Insert the lever into the clamp (2)
• Pump until the head pin (3) is completely
drawn out
• Carry out the movement Lower until the
derricking cylinder is in the derricking
cylinder support
• (C) – Fasten the disc with the bolt (4)
• Stow away the lever and the lifting device
G
Risk of accident from falling derricking cylinder
Always take the load off of the derricking cylinder using the lifting device
before retracting the head pin. This prevents the derricking cylinder from
falling down, injuring people or being damaged when the bolts are undone.
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