1. The screws of the fasteners of the electric forklift are loose, the guide wheels and rollers of the car body are seriously worn, and the gap is too large;
2. The wear gap between the chain and the pin shaft of the chain piece is too large, or the gap between the upper and lower staples of the fork and the beam of the fork frame is too large;
3. Check whether the conflict between the guide wheel, the roller and the gantry is too large. Whether the cooperation gap between the fork and the fork frame beam is too large, these factors will cause abnormal sound when the electric forklift is in use;
4. Check whether the tire screws of the electric forklift are loose, whether the bearings are damaged, etc.;
5. The gear pump of the electric forklift fails. For example, the air enters the pump from the oil suction pipe or the seal, and the resistance of the oil suction pipe is too large, or even partially blocked. Gear pump accuracy is not high. The pump and the coupling are not coaxial.

Maintenance method: add appropriate lubricating oil to the connection, if the abnormal noise is reduced, it means a leakage problem, just tighten the joint or replace the sealing ring directly; if there is no change, check the gear accuracy, carry out research and adjustment, and if necessary Change gears. Finally, check the coaxiality between the pump and the coupling, pay attention to the difference between the working state and the static state, and adjust according to the technical requirements.
There are many reasons for the abnormal sound of electric forklifts. Forklift maintenance personnel should test and find the reasons one by one, so as to fundamentally solve the problem of abnormal sound of forklifts.