There are two kinds of cleaning agents commonly used to remove scale, one is to add 750g of caustic soda and 250g of kerosene in 5000g of water; the other is to add 1000g of soda powder and 500g of kerosene in 5000g of water. The amount of cleaning agent should be determined according to the amount of cooling water. The descaling step is:
1. The engine of the tank truck is extinguished at the normal working temperature, and the net cooling water is immediately discharged (the thermostat with a thermostat shall be removed), and the cleaning agent shall be added to the cooling system.
2. Start the engine of the tank truck and run at medium speed for 5 to 10 minutes. During this period, several revolutions can be changed to change the flow rate of the cleaning agent and flush out the deposits in the system. Then stop for 10-12 hours to allow the cleaning agent to fully react with the scale.
3. Restart the tank car engine and turn off the engine after 5 to 10 minutes of medium speed operation. Remove the cleaning agent while hot.
4. Change into clean water and continue to clean it two or three times until the released water is free from dirt.
5. Reinstall the thermostat and clean up.
  
Tank car engine maintenance is a long-term process. Regularly cleaning the scale of the engine cooling system can achieve better results.
CNC Grinding is mainly used for finishing or semi-finishing, usually as the last or last few steps. Its advantages are high precision and high surface finish, but its cutting amount is small, the speed is slow, and the efficiency is low. Generally, the components is machined with CNC machining, wire cutting or EDM, etc. Grinding Machining usually includes surface grinding machining, cylindrical grinding machining and internal grinding machining. With the continuous development of technology and the continuous improvement of products requirements, more and more CNC grinding machining, PG machining and JG machining are used, and this type of machining is becoming more and more common, and the precision is higher than ordinary grinding.
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