During operation, improper use and maintenance have led to a persistently high transmission failure rate. Particularly during use, failure to strictly adhere to maintenance procedures and the lack of timely inspections and routine maintenance accelerate transmission damage and malfunctions, even exacerbating existing problems.
Severe oil seal leakage in the transmission lines: Check the sealing of the oil line from the transmission oil pan to the transmission pump suction line. If leaks are found, repair or replace the line.
Inappropriate adjustment of the pressure regulating valve: The pressure regulating valve core controls the transmission's output pressure. Insufficient output pressure can lead to low transmission oil pressure. Adjust the pressure regulating valve to the specified value, remove the pressure regulating spring, and the valve core will be visible. When the pressure is less than 1.08 MPa, remove one pressure regulating ring and shorten the length of the pressure regulating valve retaining sleeve; conversely, increase the length to adjust the valve to the appropriate parameters.
Damaged pressure regulating spring: The pressure regulating spring adjusts the high input pressure to the specified output pressure and maintains output pressure balance. If the pressure regulating spring of the pressure reducing valve is damaged, the transmission will be unable to output pressure normally.
Check if the pressure regulating spring is damaged. Remove the accumulator plug bolts and take out the accumulator piston until the pressure regulating spring is visible. Check if the spring has lost its elasticity, if the spring seat is broken, or if the valve stem or accumulator piston is stuck, preventing the pressure regulating spring from adjusting.
Clogged transmission filter: A clogged hydraulic transmission oil filter can lead to poor oil supply, resulting in low transmission oil pressure. Find the cause of the blockage and replace the oil or filter promptly.
The normal pressure range for a transmission is 1.08MPa to 1.47MPa. If the oil pressure is too low, it can easily lead to insufficient driving force, a lack of power, and inability to shift gears. There are four possible causes for this malfunction; please be familiar with them!
