10 common problems of forklift trucks and their solutions

Q: The drive axle oil leakage 　　 A: All oil seals are damaged and need to be replaced; the gasket is damaged and needs to be replaced; the stud is loose and the bolt needs to be re-tightened; the vent plug is blocked and needs to be cleaned and removed.　　Q: The drive axle is heated. 　　A: Lack of lubricating oil or oil deterioration, lubricating oil should be added or replaced; the bearing adjustment is too tight and needs to be re-adjusted. Q: The drive axle is noisy. A: The lubricating oil is insufficient, and the lubricating oil needs to be added according to the specified requirements; gears, bearings and other parts are excessively worn or damaged, and need to be inspected, repaired or replaced; improper adjustment, excessive gear meshing clearance or bearing pre-tightening Improper, need to re-adjust and check; differential cross shaft transition loose, need to replace cross shaft. Q: The oil circuit system cannot be established. Pressure A: The oil circuit is not sealed in the high and low cavities, and the internal leakage is serious. It is necessary to check the pipeline to remove dirt and replace the seals; the outlet back pressure valve does not produce back pressure, check, repair and replace; oil pump Damaged and need to be replaced. Q: Torque converter oil temperature is high. A: The guide wheel is stuck or does not rotate flexibly and needs to be inspected, repaired and replaced; the working oil does not meet the requirements and needs to be replaced with new oil; the oil level is too low or the system generates bubbles, increase the working oil to remove the bubbles; The oil pipe cooler in the system is blocked, and the dirt in the system needs to be removed; bearings and gears are damaged and need to be replaced; internal leakage is serious, check and replace the seals.　　Q: The gearbox cannot be disengaged.　　A: The friction plate burns and needs to be replaced; the return spring is damaged and needs to be replaced; the oil return line is blocked and foreign objects need to be removed; the micro-valve brake interlock valve does not return, and the spring needs to be replaced.　　Q: The gearbox is noisy. 　　A: Gears or bearings are worn and need to be replaced; the bearing preload is insufficient and needs to be re-adjusted.　　Q: The gearbox is overheated.　　A: The oil level is too high or too low, and the oil level needs to be adjusted according to regulations; the friction plate is burned, and the friction plate is replaced; the bearing gear is damaged and needs to be replaced.　　Q: The gearbox brake valve is stuck and does not act. 　　A: The return spring is invalid, replace the return spring. Q: The gearbox cannot be put into gear A: The gear pressure is not enough, the pressure of the pressure regulating valve is too low, adjust the pressure of the pressure regulating valve to the specified value; the oil pump is not working properly, the seal is not good, repair the oil pump and replace the seal; the pipeline is blocked , The filter element of the oil filter is blocked, clean and remove the dirt or replace the filter element; the oil level is too low, the oil volume is insufficient, and enough oil needs to be added; the clutch seal is damaged and leaks, replace the seal; the control valve stem is not in place, adjust to the correct s position.