Malfunctions during crane operation
14.5 Emergency operations and programs
Operating manual 3 302 736 en 14 - 29
GMK4090
xx.xx.xxxx
Mechanical
emergency
activation
The following requirements must be met before manually unlocking a lock:
– The main boom must be lowered to the horizontal position so that the tel-
escopic section cannot retract by itself.
or
– The telescopic section to be unlocked is secured against retracting by
itself by using an auxiliary crane. Telescoping is done with the auxiliary
crane.
H
If the telescoping cylinder is positioned at a locking point, the correspond-
ing telescopic section cannot be locked or unlocked manually.
There are two M8 bolts for every telescopic section:
You will need a suitable tool (5), at least
250 mm (9.8 in) long.
Depending on the execution, the bolts (4) are
turned into bore (1) or (2) of the locking pin to
unlock.
If necessary, you must remove the lubricating
nipple (6) from the bore (1).
Pins located further inside are reached
through the bores (3).
s
G
Risk of accidents due to sudden retraction of a telescopic section
Before unlocking the telescopic section, secure it against automatic retrac-
tion. This prevents the retracting telescopic section severing one of your
limbs or the truck crane being damaged or overturned by the telescopic
section suddenly retracting.
Telescopic section: I II III IV V
Length:
235 mm
(9.3 in)
205 mm
(8.1 in)
175 mm
(6.9 in)
145 mm
(5.7 in)
115 mm
(4.5 in)
To Next Page
Loading...
Need help?
General
