1. The screws of the standard parts of the electric forklift are loose, the guide wheel and roller of the body are damaged seriously, and the gap is too large;
2. The gap between the transmission chain and the shaft pin of the chain piece is too large or the gap between the upper and lower staples of the fork of the forklift and the load-bearing beam of the wheel frame is too large;
3. Check whether the contradictory rolling clearance of the guide wheel, roller and gantry is too large. Whether the cooperation gap between the forklift fork and the wheel frame load-bearing beam is too large, this reason will cause the electric forklift to produce abnormal noise during use;
4. Check whether the tire screws of the electric forklift are loose, and whether the rolling bearings are damaged;
5. There is an abnormality in the gear oil pump of the electric forklift. For example, the gas enters the pump from the suction pipe or the seal, and the friction resistance of the suction pipe is too large, or even a part of it is blocked. The precision of the gear oil pump is not high. The pump is not the same shaft as the coupling.
Maintenance method: add appropriate grease to the joint, if the abnormal noise is reduced to a certain extent, it indicates a leakage problem, just tighten the joint or replace the sealing ring immediately; if there is no change, check the transmission gear fineness and carry out Grind and adjust, and replace the transmission gear when necessary. Finally, check the parallelism of the pump and the coupling, pay attention to the difference between the running state and the static state, and adjust according to the technical standards.
There are many factors that cause abnormal sound in the actual operation of electric forklifts. Forklift maintenance staff should check and find out the reasons one by one, so that the common fault of abnormal sound of electric forklifts can be dealt with from the source.