The maintenance cycle and maintenance items of diesel engines vary depending on factors such as vehicle usage and manufacturer requirements. The following are general maintenance cycles and maintenance items:

Maintenance cycle:

Daily minor maintenance cycle: Usually, minor maintenance is carried out every 5000-10000 kilometers or every six months, whichever comes first. If the vehicle frequently travels in harsh road conditions, such as dusty construction sites, muddy rural roads, or frequently operates under heavy or high loads, the minor maintenance cycle may need to be appropriately shortened.

Major maintenance cycle: The mileage interval for major maintenance is generally around 20000-40000 kilometers, or every two years. However, the specific time for major maintenance also needs to be determined based on the actual usage of the vehicle.

maintenance program:

Oil and oil filter replacement:

Engine oil is the "blood" of diesel engines, playing a role in lubrication, cooling, sealing, and other functions. Change the oil every 5000-10000 kilometers or depending on the type of oil (mineral oil 5000 kilometers or 6 months, semi synthetic oil 7500 kilometers or 8 months, fully synthetic oil 10000 kilometers or 1 year).

The function of the oil filter is to filter impurities in the engine oil, preventing impurities from entering the engine interior. The oil filter should be replaced at the same time every time the engine oil is changed.

Maintenance or replacement of air filter:

The air filter can block dust, impurities, and other substances from entering the engine, ensuring the cleanliness of the intake air. The paper dust collection cup air filter should be dusted every 50-100 hours of operation, and the surface dust can be brushed off with a soft brush.

The air filter may need to be replaced every 10000-20000 kilometers or depending on actual usage. If driving frequently in dusty environments, the replacement cycle should be shortened.

Maintenance or replacement of fuel filter:

The fuel filter can filter out impurities in the fuel and avoid problems such as clogged fuel injectors. Every 15000-30000 kilometers, it is necessary to inspect and clean the fuel filter.

If the fuel filter is found to be damaged or the filtering performance is reduced, it should be replaced in a timely manner to ensure the cleanliness of the fuel.

Check and adjust valve clearance: With the use of the engine, the valve clearance may change, affecting the performance of the engine. Generally, every 20000 kilometers of driving, it is necessary to check and adjust the valve clearance to ensure the normal operation of the engine.

Check the injection condition of the fuel injector: The working condition of the fuel injector directly affects the injection and combustion effect of the fuel. Regularly check the injection condition of the fuel injector, such as injection pressure, spray shape, etc., and clean and correct it if necessary.

Check the cooling system:

Check the coolant level and quality to ensure sufficient coolant and good performance. The coolant is usually replaced every 30000 kilometers or two years. If problems such as coolant deterioration or leakage are found, they should be dealt with in a timely manner.

Check the appearance of the radiator for damage, blockage, etc., to ensure the heat dissipation effect of the radiator. If the radiator is clogged, it can cause the engine to overheat, affecting its performance and lifespan.

Check the condition of the belt: Check the engine belt (such as timing belt, fan belt, etc.) for wear, cracks, looseness, etc. If there is a problem with the belt, it may cause the engine to malfunction. Generally, the timing belt needs to be replaced every 60000-100000 kilometers of driving.

Check the electrical system: Check the battery level, electrode connections, etc., to ensure that the battery can work properly. At the same time, check if the output voltage of the generator is normal, and if there are any loose or worn wires, plugs, etc.

Cleaning the engine compartment: Regularly cleaning the engine compartment to remove dust, oil stains, and other impurities can not only keep the engine compartment clean, but also facilitate the timely detection of potential problems such as oil leaks and aging wiring.