Driving modes
6.4 Main boom, removing/installing
Operating Manual GMK6300L 3 112 xxx en 6 - 29
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6.4.5 Switching the pressure relief on/off
Pressure relief prevents the derricking cylinder from extending when the
engine runs, after the main boom has been removed.
When removing
• Switch the pressure relief on before pulling the derricking cylinder head
axle.
When installing
• Only switch off the pressure relief after fitting the derricking cylinder head
axle.
• Remove the padlock (2).
• Bring the lever (1)
– Used for switching on into position A.
Depending on its design, the lever will
face up or down.
– To position B to switch off.
• Secure the lever with the lock (2) and
remove the key.
H
When the pressure relief is switched on, the main boom cannot be raised.
G
Risk of accident from falling boom!
Check to see whether the main boom is in the boom rest before switching
off the pressure relief.
This prevents the raised main boom from dropping down.
G
Risk of accident from falling boom!
Never switch on the pressure relief during crane operation.
This prevents the raised main boom from dropping down.
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