There will be many problems when antifreeze enters the engine oil in winter, and the radiator leaks. It is also necessary to change the corresponding diesel oil and lubricating oil in the deep winter. Therefore, all preparations should be made before maintenance.
One or three water pump inspection
Some equipment has antifreeze in the engine oil after replacing antifreeze. This is because the water seal of the water pump is aging and ineffective, which leads to the antifreeze entering the lubrication cavity through the water seal and finally reaching the oil pan. Therefore, the oil level should be closely observed after replacing antifreeze. If the oil level rises, it should be stopped for inspection. Generally, the method of replacing the water seal of the water pump or the water pump assembly is adopted.
After the repair, when the machine is idling, use new engine oil to remove the residual antifreeze entering the engine lubrication system. Attention: Shorten the interval of next oil change to ensure the normal function of the engine lubrication system.
Second, choose high-quality antifreeze.
There are two main indicators to measure antifreeze: first, freezing point, which can reach -40℃ for ordinary antifreeze and-60℃ for high-quality antifreeze; Secondly, the boiling point of antifreeze should reach at least 108℃.
Anti-corrosion and anti-rust performance is also very important, which is directly related to the service life of equipment cooling system.
Scale prevention performance should also be considered. More than 65% of the equipment cooling system has scale and rust, which seriously affects the cooling function of the cooling system. Therefore, before adding antifreeze, it is best to clean the scale and rust spots in the radiator.
In general, antifreeze should be changed once a year. One year later, the batch standard of antifreeze could not meet the original nursing requirements.
Different types of antifreeze should not be mixed to avoid chemical reaction, precipitation or bubbles.
Anti-corrosion filter elements of three cooling systems
The anti-corrosion filter element of cooling system contains additives such as ion exchange resin, corrosion inhibitor and magnesium plate, which can effectively protect related components. Ion exchange resin can prevent the formation of scale. Preservatives can form an anticorrosive film in the cooling water jacket to prevent oxidation. Because the metal activity of magnesium is stronger than that of iron, corrosive ions in the cooling liquid react with magnesium plate first, which effectively prevents iron from being corroded. In addition, the anti-corrosion filter element can also filter rust, scale and sediment.
Selection of four lubricating oils
The suitable lubricating oil should be selected according to the local temperature and the freezing point, pour point and viscosity of the lubricating oil.
Lubricating oil with high freezing point cannot be used at low temperature. On the contrary, in areas with higher temperature, it is unnecessary to use lubricating oil with low freezing point. Both freezing point and pour point are indicators of low-temperature fluidity of lubricating oil, and there is no principle between them, but the determination method is slightly different. The freezing point and pour point of the same lubricating oil are not exactly the same, and the pour point is generally 2-3℃ higher than the freezing point.
Maintenance of electrical equipment
In winter, it is difficult to start the aging equipment, so in the early seasonal maintenance, it is an essential measure to check and replace the aging electrical circuits and components, and at the same time, it is necessary to thoroughly check and maintain the battery.
Warm air equipment is essential for outdoor operation in winter, so the working condition of warm air equipment should be inspected and maintained before the severe winter comes.
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