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High water temperature fault caused by excavator water pump

The excavator is most prone to high water temperature fault. Today, Xinsong shared with you the fault of high water temperature caused by water pump. How to check whether the excavator water pump works? Remove the thermostat, start the fire, run repeatedly at idle speed and high speed, press the water pipe to see if there is water passing through the water pipe. If the water pipe is hard, the pressure is normal. Then open the water tank cover and observe whether the water flow speed is normal. How to deal with water pump leakage? Open the top cover, remove the fan water stop ring, check the inside of the water pump belt, open the bottom plate of the oil pan, and confirm the specific leakage position. If the water pump oil seal and water pump cushion are damaged, they can be replaced directly.

Can't the pump drain? There is no drainage on the pump. If you need to drain, you can open the drain switch under the water tank to drain. In addition, there is a drain plug (yellow) on the engine block, which can be opened to drain. How to replace the water pump? Loosen the bolt and remove the old water pump; Use a scraper to remove the dirt on the joint surface of the water pump and the cylinder block and degrease, and then apply liquid sealant on the water pump. Note: the sealant should be applied evenly without broken marks, with a width of 2-3mm. Install the water pump 20 minutes after applying the sealant, and the groove on the flange surface of the water pump should also be filled with sealant. Align the locating pin of the cylinder block and install the water pump. PS: when installing the water pump, it is recommended to use the guide bolt to prevent the dislocation of liquid sealant.

The function and structure of excavator water pump is to pressurize the cooling water and make the cooling water circulate in the cooling system. Centrifugal water pump is widely used in automobile engine, which is composed of water pump shell, water pump shaft, impeller and water inlet and outlet pipes. The transmission mode of water pump is gear transmission, and the speed of water pump is 1.5 times that of diesel engine. Water pump installation and maintenance parts. Working principle when the water pump impeller rotates, the coolant in the water pump is driven by the impeller to rotate together, and is thrown to the edge of the water pump shell under the action of centrifugal force, and then is pressed into the engine water jacket through the outlet pipe on the shell which is tangent to the impeller. At the same time, the pressure in the center of impeller decreases; The cooling liquid in the radiator is sucked into the pump cavity through the water inlet pipe, so that the cooling liquid in the whole cooling system circulates.

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High water temperature fault caused by excavator water pump

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