What is the reason why the water temperature and oil temperature of SY 135C-8 excavator of Sany Heavy Industry become higher?

Phenomenon: The water temperature of SY 135C-8 excavator of Sany Heavy Industry becomes higher after working for more than one hour. After inspection, it was found that the water tank was short of water and the water was boiling. When the water temperature rises, the oil temperature also rises. Then the excavator can't walk when the engine is heavily loaded. The water tank cover, water pump and 6-blade fan of the excavator have just been replaced. Sany Heavy Industry SY 135C-8 excavator has higher water temperature and oil temperature: 1 less water in the water tank. The water tumbling may be caused by combustion gas entering the water cavity. 2 Hydraulic oil radiator tank seepage, thermostat necrosis, hydraulic oil return check valve and tank aging may all cause the excavator water temperature to be high. Typical combustion gas enters the water cavity when the water rolls. Disassemble the engine and check whether the cylinder gasket is washed by high-pressure gas. Check whether the cylinder head or cylinder liner is broken. In fact, there are many reasons for the high water temperature: pumps, thermostats, radiators, fans and pipes may all cause the high water temperature. 1 Check the injection advance angle (13 degrees). 2 Remove the thermostat to block the small circulation. 4 Remove the fan belt, start the engine, and check whether there are bubbles in the water tank (water flows without removing the belt). Put the drain pipe into the water to see if it bubbles. 5. Measure the temperature difference between the upper and lower pipes. If it is too small, clean the inside and outside of the water tank. 6. Check whether the hydraulic oil temperature affects the water temperature. 7. Check the sponge around the water tank. 8. Change the pulley for lathe processing. 9. Replace the 9-blade fan. 10 block the heating pipe. 1 1 Buy a water tank freshener and clean a sewer.