The water pump is one of the most important parts in generators that by circulating water inside the engine, controls temperature changes in the device and cools the engine and cylinder components; this component causes water to circulate in the engine to improve efficiency and performance.
Increasing the temperature of the device can cause problems with its operation and cause the device to fail, so there must be a component that controls this temperature when the engine is running, which is the responsibility of the water pump.
First, water enters the water pump from the radiator and thermostat, then it enters the oil cooler and the main cylinder bore. Finally, it goes to the cylinder head bushings, radiator cooling fan, thermostat, etc., and this rotational movement continues until the engine temperature reaches a balanced level.
Components of a water pump
Bearing
Three branches water pump installation
Felt bowl
Spacer plate
Water pump shaft
Water pump shell
Water pump impeller assembly
Signs of a broken water pump
The following could indicate a breakdown of this part of the device:
The temperature of the diesel generator increases.
The impeller fan is running continuously, but the temperature gauge is not decreasing.
Even though the device is at a high temperature, the radiator is cold.
Despite the previous symptoms, no water leakage is observed.
Water pump failure
Any damage to the generator water pump can cause irreparable damage to the generator. Of course, you should know that the water pump itself does not always fail, and it is possible that the thermostat or radiator may fail, causing an increase in temperature and also instability in the coolant temperature.
However, if the water pump itself is damaged, it is better to replace it and repairing it is not recommended in most cases. Below, we will introduce you to the causes of water pump failure and the cases that cause damage to this part:
Rusting of the blades inside the water pump
As a result of using empty water, using non-standard water, or not adding antifreeze to the water, deposits and rusting of the internal passages of the engine occur.
The deposits that form inside the radiator narrow the water channels and eventually cause them to clog. On the other hand, these deposits create thermal insulation and cause heat dissipation. This type of problem can also occur in the bushings, block, and cylinder.
In order to remove the deposits, the upper and lower radiator sources must be opened and the channels opened using a tool called a skewer.
Of course, in channels where the amount of deposits inside them is very high, this operation does not work, and in this situation, the entire radiator network must be replaced.
To descale the water inside the cylinder, it must be immersed in an acidic solution and, depending on how thick the deposits are, kept in the solution and finally washed and dried using hot water.
Water freezing inside the engine and breaking the body of the part
In this case, a radiator water leak occurs.
Cutting of the drive shaft
This causes the fluid flow to stop, and if the engine is not shut off in this condition, the parts will melt and the gaskets will burn, causing serious damage to the engine.
Damage to the bearing or primary ring
Damage to the primary ring, bearing, or seal can cause issues such as water leaks, water infiltration into the oil or the radiator.
Corrosion in the ribs and other parts
Not using antifreeze
Using non-standard antifreeze
Retaining ring failure
Wear and tear of the inner blades
Durability and longevity of the water pump This part works continuously and allows the engine to withstand the heat caused by the combustion process.
When we talk about the lifespan of this part, we can say that it has a very high durability and longevity. However, since the failure of this part can lead to the failure and damage of the entire device, its manufacturers do their best to increase its durability as much as possible.
However, it is recommended that you pay close attention to the warning signs of the device to avoid damage to this part.
Replacing the diesel generator water pump To replace the water pump, the following steps are performed:
First, the diesel generator must be cold and the radiator water must be drained.
The radiator bolts and hose clamps must be loosened.
The radiator must be separated from the engine.
Next, the impeller and pulley bolts and the bolts around the shell must be loosened.
Finally, to close it, the shell gasket is evenly tightened with the water pump bolts, and then the impeller and pulley, and finally the radiator bolts and hose clamps are tightened.
Disadvantages of diesel generator water pump
First of all, you should know that this component is like the heart for humans, and its absence will cause the device to malfunction. However, it may have some disadvantages:
Due to the water pump bearing or bushing failure, there is a possibility that this part of the device will make noise during operation. Also, at times, water may leak from the water pump. Sometimes, the water pump blades may break, which is caused by the water freezing inside the cylinder block when the temperature drops and there is no antifreeze.
One of the important points that you should keep in mind for the proper functioning of the water pump is to pay attention to the water pumping pressure. If this pressure is higher or lower than the standard limit, it will cause significant damage to the thermostat, hoses, radiator, connections, etc.
