Under the influence of high-frequency use, complex stage environments (such as confined spaces and cross-operation of multiple devices) and improper operations during transportation and storage, various minor faults are inevitably prone to occur to stage hoists. To help on-site operators quickly troubleshoot problems, standardize disposal measures, and ensure operational safety as well as the smooth progress of events, the following guidelines are provided.
Fault PhenomenonWhen pulling the hand chain, the hand chain disengages from the sprocket tooth grooves, resulting in the phenomenon of "tooth skipping" or "derailment"; abnormal noises occur during the pulling process, the hand chain bears uneven force and fails to transmit power effectively, which leads to the interruption of lifting or traction operations.
Troubleshooting MethodsStop pulling the hand chain immediately and check the fixing condition of the equipment; if the main unit shakes, the fixing points need to be re-reinforced. Adjust the direction of the pulling force, align the hand chain and the sprocket to the same working plane, and gently push the hand chain to make it re-engage with the sprocket tooth grooves. If wear or deformation is found on the sprocket tooth grooves or the hand chain, timely repair and grinding shall be carried out, and the corresponding components shall be replaced if the wear is severe. Before resuming operations, pull the chain several times under no-load condition first, and only after confirming that the hand chain meshes smoothly with the sprocket without tooth skipping, proceed with the load-bearing operation.