16.4.2 "Winch off" (when fitted)
Crane in overload condition by the intervention of the load limiter of the winch
Manoeuvres not allowed
- Clockwise/anticlockwise rotation
- Inner boom lift/descent
- Outer boom lift/descent
- Exit of the crane extension boom sections
- Hydraulic jib lift/descent (if crane is equipped with)
- Exit of the jib extension boom sections (if crane is equipped with)
- Winch rope lift
Crane in overload condition for winch rope totally unwound
Manoeuvres not allowed
- Winch rope descent
16.4.3 "Lifting block" (Prolink)
Function of the safety device controlling the articulation "Prolink"
When the first angle limit alfa1 is reached, the safety device temporarily stops all
movements and activates the flashing red light; "Warning angle" is displayed on
the screen. In order to reactivate all the crane functions (except for the lifting of the
inner boom that in this case is definitely disabled) just put the all the levers in neu-
tral position. Press the LMI button to remove the message "Warning angle" (it will
disappear when the temporary block angle alfa1 is no longer exceeded).
When the second angle limit alfa2 is reached, the safety device definitively stops
all lifting movements and activates the fixed red light; "Max angle crane" or "Max
Angle jib" are displayed according to which boom has reached the limit.
The outer booms of the crane and of the hydraulic jib can reach both the alfa1
(temporary 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.
Lift stop by the activation of crane angle sensor
Manoeuvres not allowed
- inner boom lift
- outer boom lift
Lift stop by the activation of hydraulic jib angle sensor
Manoeuvres not allowed
- inner boom lift
- outer boom lift
- hydraulic jib lift
- winch lift
16.4.2
CONTROLS TO OPERATE
THE CRANE
GR4_5 - EVOLUTION
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