Yongmao STT113 - Maintenance and Fault Clearance; Instruction for Special Dangerous

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
2B - 5
（3）After one day’s work:
a). Lift the hook below the limit point, meanwhile, it is forbidden to leave any
load on the hook;
b). Drive the trolley close to the mast;
c). Starting the weather vane;
d). Grip the clamp rail on the track;
e). Cut off the power supply and locked.
5. Maintenance and fault clearance during the tower crane operation
（1） Debug, maintenance and check-up each part of the crane according to the
method and cycle specified in operation manual; and replace some parts and
devices according to the regulation;
（2） If it needs to service and maintenance the tower crane with power outage, adopt
necessary measures to prevent false starting of the crane. First, lock the power
supply panel, and take off the key. Second, hang warning plate on the panel;
（3） If it needs to dismantle some safety devices during service and maintenance,
after this, it should be assembled and readjusted.
6. Instruction for special dangerous
（1） When operating tower crane near the air line, there should be enough distance
between the tower crane and air line.
a). Once the tower crane connected with the air line, the drive should stay in the
cab, to prevent from getting an electric shock;
b). Drive the crane out of dangerous zone at once;
c). Notify the person around don’t close to the crane;
d). Cut off the power supply which connected with the air line;
e). Don’t leave the tower crane unless you can confirm that the electric wire has
been cut off