USE OF IMPLEMENTS
GR3_4_5
EVOLUTION
The outer booms of the crane and of the hydraulic jib can reach both the alfa1 (tem-
porary block) and alfa2 (definitive block) limits, independently from the position of the
other booms.
But if one of these two booms reaches the second limit alfa2, this condition evidently
stops any other lifting.
Only if neither the crane outer boom nor the hydraulic jib reach the first angle limit
alfa1, the inner boom can attain its max limit alfa2, that is its mechanic stroke end.
Folding the crane
When you fold the crane, the outer boom is positioned with an angle that gene-
rally exceeds the second limit alfa2; this is because the safety device “Pro link”
never disables the descent of the inner and outer booms.
At this point the inner boom lifting is not permitted. To unfold the crane just turn
off the system; when you turn it on the message “Crane Folded” is displayed.
At this point the only manoeuvre allowed is the folding of the outer boom (we
recommend to perform this manoeuvre on all the cranes in order to ensure a cor-
rect and safe crane unfolding); if you activate it for some seconds, the message
“Crane Folded” will disappear and all the manoeuvres will be reactivated.
20.8
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