Large truck maintenance items:
1. Oil change and three filters for oil filter, air filter and diesel filter;
2. Wheel hub maintenance. Due to the large load capacity of large trucks, their bearings use conical bearings, which need to be added with high-grade butter;
3. Change the oil of the transmission. Due to the excessive load of the transmission of large trucks, the transmission wears a lot. In order to reduce the wear and tear, the gear oil should be replaced regularly;
4. The rear axle tooth package is similar to the transmission. Basically, if the oil is changed twice, the tooth package gear oil should be changed once.

1. The replacement of oil and oil filter is mainly for the maintenance of the lubrication system. The main function of the lubrication system is to effectively lubricate the various parts of the automobile engine to prevent excessive wear. The function of the oil filter is to remove various impurities in the oil and ensure the normal operation of the lubrication system. The oil filter should be replaced with the oil when the oil is changed. Under normal circumstances, the car needs to be maintained once every 5000KM of driving.
2. The function of the air filter element is to filter the air before it enters the cylinder to remove the impurities, dust, sand and other foreign objects entrained in it. The cleaning and maintenance of the air filter element depends on the usage environment. Gasoline filter elements are generally replaced when driving to 20000-25000KM.
3. The spark plug is a consumable part and should be replaced every 20000KM. In addition, brake fluid, transmission oil, battery, throttle valve, fuel injector, brake pads and other components are all inspection items during routine maintenance, and maintenance and maintenance are carried out according to the usage.

Regular maintenance cycle:
10,000 kilometers of small maintenance is the oil filter and three oil filters: machine filter, air filter, steam filter, 20,000 kilometers is the medium maintenance, and the major maintenance is carried out every 40,000 kilometers. 20,000 kilometers of maintenance to replace the oil, machine filter, air filter and air conditioning filter, as well as some routine inspections:
1. Air filter: The correct installation of the air filter can reduce the wear of parts such as cylinders, pistons and piston rings. (Generally, it is cleaned every 5,000 kilometers, and the air filter must be replaced every 10,000 kilometers).
2. Oil filter: The correct installation of the oil filter can prevent impurities from mixing into the oil during the use of the internal combustion engine, and prevent the wear of moving parts and blockage of the oil circuit. When replacing the lubricating oil, the oil filter must be replaced at the same time, otherwise the quality of the lubricating oil will be affected. The period of changing the oil and oil filter is generally 5000 kilometers.
3. Fuel filter: Correct installation of fuel filter can prevent cylinder wear caused by impurities and moisture mixed in gasoline during storage, transportation and filling. In order to ensure the good operation of the engine, the replacement cycle of the fuel filter is generally 20,000 kilometers or 1 year. At the same time, it should be noted that the "three filters" must be maintained by professional maintenance personnel, because some professional maintenance tools are involved, and it is very difficult for car owners to do it themselves.