1. The screws of the fasteners of the electric forklift are loose, the guide wheels and rollers of the vehicle body are severely worn, and the gap is too large;
2. The wear gap between the chain and the chain pin shaft is too large, or the gap between the upper and lower nails of the fork and the crossbeam of the fork frame is too large;
3. Check if the collision rolling gap between the guide wheel, roller, and gantry is too large. Is the cooperation gap between the fork and the crossbeam of the fork frame too large? These factors can cause abnormal sound when using electric forklifts;
4. Check if the tire screws of the electric forklift are loose, if the bearings are damaged, etc;
5. The gear pump of an electric forklift has malfunctioned, such as air entering the pump through the suction pipe or seal, causing excessive resistance in the suction pipe, and even partially clogged. The precision of the gear pump is not high. The pump and coupling have different shafts.
Maintenance method: Add appropriate lubricating oil to the connection. If the abnormal noise is reduced, it indicates a leakage problem. Tighten the joint or directly replace the sealing ring; If there is no change, check the gear accuracy, perform grinding and adjustment, and replace the gear if necessary. Then check the coaxiality between the pump and coupling, pay attention to the difference between the working state and the static state, and adjust according to technical requirements.