a. When lifting heavy objects in each class for the first time (or the maximum load weight), should be lifting height of 0.5 meters from the ground after the heavy down again, check the brake performance, reliable after confirmation, then normal operation.
b. Operator in the job, should be required for the following operations to ring the alarm.
① lifting, landing weight; great start when the car driving. 1.5 ton electric chain hoists
② clear sight of the crane when traveling through to continuous-ringing alarm;
③ traveling crane when the crane near the cross in another.
④ lifting heavy objects near the staff.
c. Operation running under a unified command signal should be. 15 ton electric chain hoist
d. Work in a power outage, the controller should handle all placed in the "zero" position, re-work should be checked before the crane movements are normal.
e. Large cranes, trolley during normal operation, parking brake open anti prohibited; transform large trolley direction of movement, the handle