How To Use The Radiator For Diesel Generator Sets?

- May 03, 2018-

How to use the radiator for diesel generator sets? 


The radiator of the diesel generator sets plays a significant role in the entire body of the generator set. If the radiator water tank is used improperly, it will cause considerable damage to the diesel engine and the generator. In severe cases, the diesel engine will be scrapped. Thus, the proper use of a diesel generator tank becomes a more important topic. Below, summarize the following points for your reference:


1. Use clean soft water

Soft water usually has rainwater, snow water and river water. These waters contain less minerals and are suitable for use in engines. And the mineral content in well water, spring water, and tap water is high. These minerals are easily deposited on the tank walls, water jackets, and waterway walls when heated and form scales and rust. This deteriorates the ability of the engine to dissipate heat and can easily cause the engine to overheat. The added water must be clean. Impurities in the water can clog the water channel and aggravate the wear of the pump impeller and other components. If hard water is used, it must be softened in advance. The softening method is usually heating method and adding lye (usually caustic soda) method.


2. Do not add water after starting

Some users, in order to facilitate the start in winter, or because of water sources, often  add water after start-up. This method is very harmful. After the engine is started, there is no cooling water in the body, and the various components of the engine heat up quickly. In particular, the temperature at the water jacket outside the injector of the cylinder head and the diesel engine is particularly high. If cooling water is added at this time, the cylinder head and water jacket are is easy to crack or deform due to quenching. When the engine temperature is too high, the engine load should be unloaded first, then idle at low speed, and then add cooling water when the water temperature is normal. 


3. Prevent burns when open the tank cover

Do not blindly open the tank lid to prevent burns. The correct course of action is to idly idle for a while and then extinguish the generator. After the temperature of the generator is reduced and the pressure in the tank drops, unscrew the tank lid. When unscrewing, cover the lid with a towel or cloth to prevent hot water and steam from being sprayed on the face and body. Do not look down at the water tank, and quickly withdraw it after unscrewing. When there is no hot gas or steam, remove the tank cover to prevent scalding.


4. Add hot water in winter

In the cold winter, the generator is hard to start. If cold water is added before starting, it is easy to freeze in the water tank and the inlet pipe when the water is added or when the water is not added in a timely manner. This causes the water to be unable to circulate, and even causes the tank to crack. Adding hot water, on the one hand, can increase the temperature of the engine to facilitate starting; on the other hand, the above freezing phenomenon can be avoided as much as possible.


5. Antifreeze should be high quality

At present, the quality of antifreeze on the market is uneven, and many are using inferior products to disguise quality products. If there is no preservative in the antifreeze, it will seriously corrode parts such as the engine head, water jacket, radiator, water stop ring, and rubber parts. At the same time, a lot of scale will be produced, which will cause the engine to dissipate heat and cause engine overheating failure. Therefore must use the regular manufacturer's products.


6. Add soft water in time

After filling the tank with antifreeze, if it is found that the level of the tank is reduced, it is only necessary to add clean soft water (distilled water is better) under the premise of ensuring no leakage. Because the commonly used glycol-based antifreeze has a high boiling point and evaporates water in the antifreeze, it does not need to be supplemented with antifreeze but only soft water. It is worth mentioning: Do not add hard water that has not been softened.


7. Discharge antifreeze in time to reduce corrosion

Whether ordinary antifreeze or long-lasting antifreeze, it should be released in time when the air temperature becomes higher, which can prevent the corrosion of the machine parts. Because the antiseptic added to the antifreeze will gradually decrease or fail with the extension of the use time. What's more, some simply do not add preservatives, which will have a strong corrosive effect on the parts. Therefore, the antifreeze should be released in time according to the temperature conditions, and a thorough cleaning of the cooling pipeline should be performed after the antifreeze is released.


8. Change the water regularly, clean the pipeline

The frequent replacement of cooling water is not recommended because after the cooling water is used for a period of time, the minerals have been deposited. Unless the water is very dirty and it may block the pipes and radiators, do not change them easily. Because even if the newly replaced cooling water is softened, it still contains certain minerals. These minerals will deposit on the water jacket and form scales. The more frequently the water is replaced, the more minerals are precipitated and the thicker the scale is, so the cooling water should be replaced on a regular basis according to actual conditions. During the replacement, the cooling pipeline should be cleaned. The cleaning fluid can be prepared with caustic soda, kerosene and water. At the same time pay attention to the maintenance of the drain switch, especially in the winter, replace the damaged switch in time, can not be replaced by bolts, sticks, rags and so on. 


9. Open the tank cover when putting water

If the water tank lid is not opened when the water is drained, although the cooling water can flow out of part, as the amount of water in the radiator decreases, a certain degree of vacuum will be generated due to the tightness of the tank, which will slow down or stop the flow of water. In winter, parts are frozen because the water is not fully discharged.


10. It is not appropriate to immediately release water at high temperature

Before the engine stalls, if the engine temperature is high, do not stop immediately and release water. The load should be unloaded first to allow it to run at idle, and then when the water temperature drops to 40-50°C, the water can be discharged again. This is to prevent the temperature of the outer surface of the cylinder block, cylinder head, and water jacket in contact with water from suddenly dropping due to sudden water discharge. The temperature inside the cylinder is still very high, shrinkage is small, easy to cause cracks in the cylinder block, cylinder head due to excessive temperature difference between inside and outside. 


11. Idle the engine after putting water in winter

In the cold winter, after releasing the cooling water from the engine, the engine should be started to idle for a few minutes. This is mainly due to the fact that the water pump and other parts may retain some moisture after the water is discharged. After starting again, the body temperature can be used to dry the residual water at the pump to ensure that there is no water stored in the engine and to prevent water leakage due to freezing of the pump and tearing of the water seal.

radiator for diesel generator sets.JPG