Preparation And Check Before Test Run  
 
 
 1. The general power shall be cut off before test run and check the crane according to the following content.
All the parts should be totally completed:
 
1) The installation and assembly of parts in each group should meet the technical requirements of the drawings.
2)Parts requiring lubrication should be injected sufficient lubricant (grease).
3) The wire rope and reel should be fixed firmly without the wire rope out of the pulley groove.The stopper performs 
 flexibly and accurately.
4)Each metal structure should not be deformed and the connecting bolts must be accurate and reliable;
5)All motors, reducers and bearing block should be fixed firmly.
6)The brake performs flexibly.
7)Check whether the operating system is correct or not and the operation direction coincides with the direction of movement or not.
8)Check the quality of the crane when it is put into operation on the ground.
9)Whether it is safe when the crane operates on the ground.
10)Disconnect the motor circuit and check if all wiring of the steering circuit is correct.Check whether the insulation resistance of the motor circuit and steering circuit meet the requirements or not.
 
2.Quality inspection departments should have detecting instrument available and mark the survey marks on the effective parts. Take notes about the data after detection.
 
3.Unloaded Run Test 
The purpose of the unloaded test is to check the quality defects in manufacturing and installation. First,make each mechanism operate alone, and you should closely observe whether voltage, current, power, starting current, steering and speed is normal. Then start the joint operation,including reversible operation and high and low speed car. Check whether all moving parts are loose and there should be no deflection and vibration out of specification. The transmission gear should not produce abnormal sound and the operating temperature not exceed the specified range,and the brake performs flexibly and stably.