Routine maintenance includes using the specified oil (such as No. 6 hydraulic transmission oil), checking that the working oil level in the oil tank is between the upper and lower marks on the dipstick, and checking whether the bolts connecting the torque converter to the base and the torque converter to the radiator are loose.
Regular maintenance includes adding grease to the fan unit's oil cup every two weeks, cleaning the oil filter every two months, changing the working oil every 1000 operating hours, and changing the oil every 6000 operating hours under normal conditions. Regular inspections include checking the hydraulic torque converter for external damage and cracks, and for wear on the outer diameter of the bushings. Using a dial indicator, check the runout of the hydraulic torque converter bushings; if the dial indicator deflection exceeds 0.03mm during one revolution of the flywheel, it should be corrected by reinstalling the unit at a different angle. For torque converters with a drain plug, if the oil is found to be deteriorated, open the drain plug and repeatedly flush with new oil. For torque converters without a drain plug, a high-pressure air inverted cleaning method can be used.
