Troubleshooting and Replacement Methods for Excavator Water Pump Malfunctions

Excavators are widely used in construction and mining industries, and the water pump is an essential component of the excavator's cooling system. However, water pumps may encounter various faults, which can cause the excavator's engine to overheat, resulting in reduced performance and potential damage. In this blog post, we will discuss common fault inspection and replacement methods for excavator water pumps that are not working correctly.

How to check if the water pump is working?

The first step in troubleshooting a water pump is to check if it is working correctly. To do this, remove the thermostat, start the engine, and run it at idle speed and high speed. Then press the water pipe to see if water is passing through the water pipe. If the water pipe is hard, it means the pressure is normal. Next, open the water tank cover and observe whether the water flow speed is normal.

What should I do if the water pump leaks?

If the water pump is leaking, the first step is to open the top cover and disassemble the water blocking ring of the fan. Then check the inner side of the water pump belt and open the bottom plate of the oil pan to confirm the specific location of the leakage. If the water pump oil seal and water pump cushion are damaged, they should be replaced directly.

What should I do if the water pump cannot discharge water?

If the water pump cannot discharge water, there is no drainage on the water pump. However, you can open the drain switch under the water tank to drain the water. Additionally, there is a drain plug on the engine block that can be opened to drain water.

How to replace the water pump?

If the water pump needs to be replaced, follow the steps below:

1. Loosen the bolts and remove the old water pump.

2. Use a scraper to remove the dirt on the joint surface of the water pump and the cylinder block and degrease. Then apply liquid sealant on the water pump. Make sure to apply the sealant evenly without break marks, and the application width should be 2-3mm. After applying the sealant for 20 minutes, install the water pump. The groove on the flange surface of the water pump should also be filled with sealant.

3. Align the positioning pins of the cylinder block and install the water pump. When installing the water pump, use guide bolts to prevent misalignment of the liquid sealant.

In summary, excavator water pumps play a vital role in the cooling system of an excavator. It is essential to inspect and maintain the water pump regularly to avoid any potential faults. If any faults occur, follow the above methods to troubleshoot and replace the water pump. By doing so, you can ensure the smooth and efficient operation of your excavator.

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