Slide loader winter maintenance how to choose high-quality antifreeze

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There are two main indicators to measure antifreeze: first, the freezing point, ordinary antifreeze can reach -40 ° C, and high-quality antifreeze can reach about -60 ° C; The second is the boiling point, the antifreeze should reach at least 108 ° C.

Corrosion and rust resistance is also very important, which is directly related to the service life of the equipment cooling system. Also consider scaling resistance. More than 65% of the equipment cooling system has scale and rust, which seriously affects the cooling function of the cooling system, so it is best to clean the scale and rust points in the radiator before replacing the antifreeze and then add the antifreeze.

Under normal circumstances, antifreeze should be changed once a year, and after one year, the batch standards of antifreeze have not met the original care requirements. Different types of antifreeze must not be mixed to avoid chemical reactions, precipitation or bubbles.

2. Check the pump

Some equipment in the replacement of antifreeze in the oil after the phenomenon of antifreeze, this is due to the aging of the water seal of the pump, resulting in antifreeze through the water seal into the lubrication chamber, and eventually reach the oil pan. Therefore, the oil level should be closely observed after replacing the antifreeze. If the oil level is found to be elevated, it should be stopped for inspection, and the method of replacing the water seal or pump assembly is generally used.

After repair, under the no-load idling operation of the machine, use the new oil to take away the residual antifreeze that enters the engine lubrication system. Note: Shorten the interval time for the next oil replacement to ensure that the engine lubrication system plays a normal role.

Three, cooling system anti-corrosion filter element

The anti-corrosion filter element of the cooling system contains ion exchange resin, anti-corrosion agent, magnesium plate and other additives, which can effectively protect the relevant parts. Ion exchange resins prevent scale formation. Corrosion preventers can form an anticorrosive film in the coolant jacket to prevent oxidation. Because the metal activity of magnesium is stronger than that of iron, the corrosive ions in the coolant first react with the magnesium plate, effectively preventing the iron from being corroded. In addition, the anti-corrosion filter can also filter rust, scale and sediment. The anti-corrosion filter element must be replaced with the antifreeze at the same time, and the anti-corrosion filter element should be replaced in the 1000th hour (engine working time) to ensure that the anti-corrosion filter element plays an effective protective role.

Four, fuel oil circuit maintenance

(1) Normal selection of fuel

Diesel should be selected according to the local temperature and the cold filter point and freezing point of diesel.

(2) Maintain the fuel oil circuit

Thoroughly clean the oil-water separator: the appearance is clean, check the sewage mark, discharge impurities in time, and replace those that cannot be cleaned; Clean the diesel tank: remove the sediment at the bottom; Replace the nozzle with poor atomization; Check the fuel injection pump in poor working condition to ensure normal operation.

Five, lubricating oil selection

The appropriate lubricating oil should be selected according to the local temperature, combined with the freezing point, pour point and viscosity of the lubricating oil. Lubricants with a high freezing point cannot be used at low temperatures. On the contrary, in areas with higher temperatures, it is not necessary to use lubricants with low freezing point. The freezing point and pour point are both indicators of low temperature fluidity of lubricating oil, and there is no difference in principle between them, but the measurement 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 ° C higher than the freezing point.

Six, equipment three leakage maintenance

The phenomenon of thermal expansion and cold contraction is more obvious in the seals of hydraulic systems, gas routes, waterways, especially rubber O-rings, rectangular rings and other seals. When the temperature continues to be lower than 0 ° C, the machine will have oil leakage, air leakage and water leakage, especially when the temperature continues to be close to -10 ° C. Before the equipment enters the winter, it is necessary to carry out a comprehensive overhaul of the three leakage situations of the whole machine to eliminate the three leakage faults and hidden faults.

Seven, repair electrical equipment

Winter aging equipment more difficult to start failure, so before the seasonal maintenance to check and replace the aging electrical lines and components is an essential measure to reduce the difficulty of starting, but also need to thoroughly check and maintain the battery.

Warm air equipment is essential for outdoor operations in winter, so before the severe winter should check the work of warm air equipment, repair warm air equipment.

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