The electric chain block hoist installed after the electric hoist is newly installed or dismantled and tested shall first be air-tested several times. However, do not switch on the power before the installation is completed. Before normal use, a static load test of 125% of the rated load and lifting of about 100 mm from the ground for 10 minutes shall be carried out and checked for normality.
The dynamic load test of the electric hoist is repeated lifting and left and right movement test with the rated load weight. After the test, it is checked whether the mechanical parts of the mechanical transmission part and the connecting part are normal and reliable. It is absolutely forbidden to use in an unacceptable environment and in excess of the rated load and the rated number of closings per hour (120 times).
When installing, adjusting and maintaining the electric hoist, it is necessary to strictly check whether the limit device is flexible and reliable. When the hook is raised to the upper limit position, the distance from the hook casing to the reel casing must be greater than 50mm (10t, 16t, 20t must be greater than 120mm). When the hook is lowered to the lower limit position, the effective safety ring of the wire rope safety ring on the reel must be more than 2 turns.