1. The group hoist electric hoist should be operated under the guidance of professionals with certain knowledge. Before using the group hoist electric hoist, you should carefully read the product manual. 2. The group hoist electric hoist is strictly prohibited to be overloaded. When lifting heavy objects, it is strictly forbidden for people to work or walk under the heavy objects. 3. Before using the group hoist electric hoist, make the lower hook in a state of natural sag, and tighten the chain connecting the lifting sprocket and the lower hook to check whether the lifting chain is straightened. It is strictly forbidden to chain the street and turn the chain. 4. The trial operation of the group hoist electric hoist checks whether the sprocket and chain are meshed properly, and no chain pile is allowed. 5. Observe the presence or absence of the chain at any time during the hoisting operation of the group crane electric hoist. The receiving and releasing chains are not allowed to exceed the limit position, and the lifting chain is not allowed to hang on other objects to avoid overload. 6. During the operation of the group hoist electric hoist, observe whether there is any oil leakage and the motor temperature is too high or abnormal noise. If the above situation occurs, it must be stopped and checked. 7. The group hoist electric hoist cannot be disassembled at will. If you need to change the chain or dismantle and repair, it must be guided by professionals. 8. The lubrication of the reducer adopts lithium-based grease, and the oil is cleaned and changed once every half year under normal circumstances. 9. When the group hoist electric hoist is used in a group at the same time, it must be equipped with a special electric control cabinet produced by our company, so as not to affect the synchronization of its speed. 10. Before using the group hoist electric hoist, you must check whether the power supply meets the requirements, and operate according to the electrician's specifications, and check the correctness before running. 11. Before using the group hoist electric hoist, you must check whether the brake is reliable, regularly check whether the parts are normal, and there should be no looseness or oil leakage. 12. In the transportation, transfer and use of the site and the use of the group hoist, collision and knocking are strictly prohibited, especially knocking and collision on the top surface of the disc brake motor shell, which affects the braking torque and cannot be used normally.