In the working process of loader, the failure rate of gearbox caused by improper use and maintenance has been very high. Today, we analyzed the suspension and out of gear problems of loader gearbox:
? 1. When engaging the gear, you cannot enter the gear smoothly.
? the reasons are as follows:
??1. The pressure of pressure valve is too low;
??2. Poor operation and sealing of hydraulic pump;
??3. Hydraulic pipeline is blocked;
??4. The clutch sealing ring is damaged or leaked;
??5. The shift valve rod is not in place.
? second, when the transmission changes speed, the gear cannot be separated.
? the reasons are as follows:
??1. Piston ring bulges;
??2. Burn the clutch friction plate;
??3. Clutch return spring is invalid or damaged;
??4. The oil return pipe is blocked.
?? possible hazards caused by excessive hydraulic oil temperature of loader:
??1. The viscosity of hydraulic oil, volumetric efficiency and working efficiency of hydraulic system are reduced, the leakage is increased, and even the mechanical equipment can not work normally.
??2. Accelerate the aging and deterioration of rubber seals, shorten the service life, and even lose its sealing performance, resulting in serious leakage of the hydraulic system.
??3. The parts of the hydraulic system expand due to overheating, which destroys the normal fit clearance of relative moving parts, resulting in increased friction resistance and easy jamming of the hydraulic valve. At the same time, the lubricating oil film becomes thinner and the mechanical wear increases, resulting in the failure or scrapping of precision mating surfaces such as pumps, valves and motors due to premature wear.
??4. Oil evaporation and water evaporation are easy to cause cavitation of hydraulic components; The oil oxidizes to form colloidal deposits, which is easy to block the small holes in the oil filter and hydraulic valve, making the hydraulic system unable to work normally.
