What is the reason why the water temperature of Sany Heavy Industry SY135C-8 excavator is getting higher and the oil temperature is getting higher?

phenomenon: after the excavator SY135C-8 of Sany Heavy Industry worked for more than an hour, the water temperature became higher, and it was found that the water tank was short of water, and the water rolled. After the water temperature rose, the oil temperature also rose, and then the excavator was unable to walk when the engine was under heavy load. The water tank cover, water pump and 6-blade fan of the excavator were just replaced. The water temperature of the excavator SY135C-8 of Sany Heavy Industry became higher, and the oil temperature increased: 1. The water tumbling may be that the combustion gas enters the water cavity. 2 The permeability of the hydraulic oil radiator tank, the necrosis of the thermostat, the hydraulic oil return check valve and the aging of the water tank may all cause the high water temperature of the excavator. 3 The typical combustion gas enters the water cavity when the water tumbling. Take apart the engine to check whether the cylinder pad is washed out by high-pressure gas. Check whether the cylinder head or cylinder liner is cracked. In fact, there are many reasons for the high water temperature: water pump, thermostat, radiator, fan, pipeline, etc. may cause the high water temperature. 1 Check the fuel injection advance angle (13 degrees). 2 Remove the thermostat to block the small circulation. 3 See the size of the water circulation. 4 Remove the fan belt, and start the engine to see if there are bubbles in the water tank (if you can't see clearly the water flow without removing the belt, press the water inlet of the water tank with your hand, Put the drain pipe into the water to see if it bubbles). 5 Measure the temperature difference between the upper and lower pipes, and clean the inside and outside of the water tank if it is too small. 6 Check whether the temperature of hydraulic oil affects the water temperature. 7 Check the sponge around the water tank. 8 Change the pulley for lathe processing. 9 Change the 9-blade fan. 1 Block the warm air pipe. 11 Buy a water tank freshener and clean the water channel.