In general, the working temperature of the tractor hydraulic system is suitable in the range of 35-60°C. The system temperature should not exceed the specified range during use and maintenance. Due to the energy loss (including pressure loss, volume loss and mechanical loss) of the hydraulic system during operation, the hydraulic oil temperature rises. Increased oil temperature will cause the viscosity of hydraulic oil to drop, increase leakage loss, reduce volumetric efficiency, and even affect the normal movement of the working mechanism. If the oil temperature is too high, the oil will degenerate, produce oxide impurities, and block small hydraulic components. Holes or gaps make it impossible to work properly. Due to the relative movement of the expansion coefficient caused by the increase of the oil temperature, the clearance of the part becomes smaller, and even the card is dead and unable to move. High temperatures also cause the seals to rapidly age and lose their sealability, and can cause parts to increase friction or get stuck. After the hydraulic fluid has passed through - working cycle, the temperature rise is unavoidable. The key problem is that the oil must be cooled down before entering the tank and then enter the system to ensure that the oil temperature is within the specified range. The following measures should be taken in actual maintenance. 1. When the pressure control valve setting value is high, the working pressure should be reduced in order to reduce energy loss. 2. When heat is generated due to the loss of volume caused by the leakage of the hydraulic pump and its system components, the joints should be tightly sealed and tightened. 3. Since the viscosity of the oil is too high, the internal friction should be increased and the heat should be used when the heat is low. 4. Keeping the system's heat dissipation device in good condition is an effective measure to reduce the temperature of the system. 5. Keep the pipelines of the system unblocked to prevent the tubes from squashing, dirty oil filtering, or partial blocking of throttling paths. 6. As the ambient temperature is too high to increase the oil temperature, insulation materials and reflectors must be used to isolate the system from external heat sources.
