It is recommended to avoid working with the cable hook or the block too
close to the pulley structure; the activation of the device could provoque
dangerous swinging.
The pulley structure is provided with a group with microswitch (fig. 27) whose
lever is kept in position by a balance weight (sliding on the cable); the cable
hook or the block lift the balance weight thus releasing the lever becomes
impossible with the consequent disactivation of the controls. Please note that
each movement of the crane resulting in the exclusion of the balance weight
action, engenders the disactivation of the controls.
Folding the crane in rest position
- withdraw the flying drive (it is assembled on the cable of the cable winder)
from the pin placed near the microswitch, placed on the pulley, assembled
on the booms extension rams.
- Release the cable from all support rings placed on the booms letting that
it winds free in the cable winder.
- Insert the flying drive in the pin placed in the cable winder; this operation
gets active all crane controls to complete the rest position operations.
- Withdraw the cable from the pulleys, then remove them from the crane
(reposition the pins and the security pins)
- Operate the ascent of the winch in order to wind the cable on winch drum, always
keeping the cable in tension; with the cable layer easing the regular rewinding and
without overlaps.
- Hook the thimble to a support apt to keep the cable sufficiently taut.
NOTE
On cranes fitted with hydraulic extension, in some cases the winch is mounted on
a rotating support to reduce the overall dimensions; to put the winch to the rest
position, operate as following:
- to position the outer boom vertically.
- to withdraw the security pin, the screw nut and the locking pin from the supports.
The pin should be withdraw easily and without putting up resistance; if so the
winch support is not enough vertical with consequent dangerous rotation of
the group when the pin is finally removed. Then position the crane outer boom
in vertical position, and try to withdraw the security pin once again.
- Rotate the winch support until it reaches its new position,
- Insert the locking pin, the screw nut and the security pin.
To put the crane in working position it is necessary to carry out the operations
in reverse.
Rotate the winch support with extreme care in order not to damage the hoses
and electric components.
To fold the crane in rest position see Paragraph H0.2
(!) ATTENTION (!)
Please remember that after placing the crane in working position it is
compulsory to reset the functionality of end stroke device, otherwise the
cable could be damaged.
L3.2 Winch for crane
(!) ATTENTION (!)
It is necessary to avoid, on pain of damaging the cable, that:
- in the lifting with the winch or in the booms extension rams exit the
cable hook (or the block) takes contact with the fixed pulley;
- in the unwinding the cable is completely wound from the winch drum;
three -3- turns must be wound at least, causing the controls quiescing.
(!)
On winches not equipped with cable layer, check the rewinding of the
cable on winch drum proceeds regularly and without overlapping: it is
suggested to rewind the cable only if it is sufficiently taut.
L3.1
USE OF IMPLEMENTS
F 170A
35
fig. 27
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