How Is The Engine Water Pump Controlled

The engine water pump is an important part of construction machinery, mainly responsible for circulating the coolant to maintain the normal operating temperature of the engine. In this article, MyMROmarts will introduce in detail how is the engine water pump controlled and how to tell if the water pump impeller is bad.

How Is The Engine Water Pump Controlled

The engine water pump provides the power to circulate the coolant by rotating the impeller. Its control principle is closely related to the working state and temperature of the engine.

a. The water pump is usually driven by the engine crankshaft. The rotation of the water pump is driven by the movement of the crankshaft. The speed at which the crankshaft drives the water pump is directly proportional to the engine speed. Thereby ensuring that the water pump provides a stable coolant circulation.

b. The control of the engine water pump is also related to the engine temperature. When the engine temperature is low, the water pump may be off. To prevent excessive flow of coolant, affecting the normal operating range of engine temperature. When the temperature rises, the water pump will automatically start to provide coolant circulation.

c. The engine water pump also needs to accommodate the pressure control system to maintain proper coolant circulation. Pressure control is usually achieved through valves and sensors. To ensure that the water pump provides proper circulation pressure and avoid excessively high or low coolant pressure.

How To Tell If The Water Pump Impeller Is Bad

The water pump impeller is the core component of the water pump, and its normal operation directly affects the efficiency of the engine cooling system. If the water pump impeller is damaged, the cooling water flow will be reduced. As a result, the engine temperature is too high, which may cause the engine to overheat or even be damaged in severe cases. Therefore, early detection of water pump impeller damage is crucial. Prevent from hindering the normal operation of other diesel engine parts.

a. Abnormal noise may be produced after the water pump impeller is damaged. When the water pump is running, if you hear abnormal rattling, clicking, or metal rubbing sounds. This is most likely a problem with the water pump impeller.

b. Open the engine cover and check the condition of the coolant. If it is found that the coolant becomes turbid, has impurities, or shows obvious corrosion. This may be caused by damage to the impeller. Also, be alert if the coolant level drops frequently.

c. Turn off the engine, and remove the diesel engine belt connecting the water pump to the engine. Turn the water pump impeller by hand to see if axial play is felt. If there is an obvious swinging feeling, the water pump impeller bearing may be damaged.

d. Sometimes a damaged water pump impeller can cause the water pump to leak. It can be judged by observing whether the water pump itself is leaking, or checking whether there are obvious signs of water around the water pump.

e. If the temperature of the engine continues to rise while other diesel engine cooling system components are normal. This is most likely a decrease in cooling efficiency caused by damage to the water pump impeller.

Engine water pumps play a key role in circulating coolant in construction machinery. Through the principle of driving mode, temperature control, and system pressure control. The water pump provides constant coolant circulation. In order to judge whether the water pump impeller is damaged, it is necessary to carry out wear inspection, blade integrity inspection, bearing wear inspection, and water leakage inspection. Regularly check and maintain the water pump and observe the correct operation method. This prolongs the life of the water pump and engine.