UT
Handbook for Use and Maitenance – 50000 WB-80-87-95
Edition
01/11
Revisione
00
25
50000WB_e111_E.doc
2.6 - FOLDING OF THE BOOM
The boom of the crane shall be corretly positioned on the boom
support, while on the road. In case of incorrect positioning, on its support,
the boom could rotate on its own because of sudden curves or side slips.
COLLISION DANGER
NEVER DRIVE OR MOVE THE VEHICLE WITH THE BOOM RAISED OR THE LOAD
SUSPENDED.
2.7 - MANOEUVRING
DANGER OF OVERTURNING OR DANGER OF COLLISION
Before performing lifting operations make sure that:
•
the load does not exceed the load capacity shown in the table for that particular
boom
•
the slinging is correct, so as to prevent any sudden movements of the load
•
the hook is vertically over the centre of gravity of the load
•
no one is standing within the boom range of action
•
the area where the load is to be deposited is clear
•
the main boom is over the horizontal line,
IT IS FORBIDDEN
to lift object when
the main boom is fully lowered in folded position, (main boom lifting cylinders end
stroke); in this position the load limiting device could work incorrectly.
The control levers must be operated slowly, also when returning to neutral
position. Use special care when working with considerable outreaches as the
peripheral speeds are proportionally higher.
Sudden movements should be always avoided because they create hazardous
situations and force the crane parts and mechanisms to withstand unnecessary stress
and reduce their working life.
Do not reach the end-of-stroke positions at full speed. It forces the
crane structure end cylinder to withstand heavy stresses and brings the load
to oscillate dangerously.
Use special care when the slew sector is limited with mechanical stops.
