What Causes Excessive Transmission Fluid Temperature?
1 Answers
Excessive transmission fluid temperature is caused by insufficient fluid volume. Excessive fluid temperature: Frequent operation or prolonged operation of the oil pump can lead to excessive fluid temperature, which in turn causes the fluid to thin and prevents the oil pressure from rising. External leakage in the hydraulic system: Address any oil leakage points, primarily on sealing surfaces. Examples include damaged oil pipe joint seals causing leakage, leakage at the sealing planes of components such as relief valves, solenoid directional valves, and hydraulic check valves integrated with the oil circuit, as well as external leakage at the piston rod of the oil cylinder. The diagnosis and handling of this fault are relatively straightforward and intuitive. Internal leakage in the oil cylinder: Internal leakage in the oil cylinder due to seal failure is not visible externally, making it more difficult and complex to determine whether the internal seals are worn or damaged. The diagnostic method involves first performing a clamping action with the oil cylinder until it stops advancing and the pressure no longer increases. Maintain the clamping action, then disconnect the return oil pipe from the oil cylinder joint. If hydraulic oil continuously flows out from the return oil pipe joint on the oil cylinder, and since the piston has stopped advancing, it can be concluded that the piston seal is damaged and needs replacement.
