Diesel engine maintenance points mainly include ** air filter, oil filter and fuel filter regular maintenance and replacement **, in addition to ** crankcase ventilation system cleaning, periodic cleaning of the fuel system and regular maintenance of the water tank **. The details are as follows:
1. ** Air filter ** : regular cleaning according to the conditions of use, paper dust cup type air filter should be dusted once every 50-100 hours, surface dust can be brushed off with a soft brush; The oil bath air filter should use a clean diesel clean filter and replace the lubricating oil every 100-200 hours [^3^].
2. ** Oil filter ** : should be replaced every 180-200 times or every 500 hours of operation, to ensure that the oil smoothly through the filter, prevent dirt back to the lubricating parts, accelerate engine wear [^3^].
3. ** Fuel filter ** : every 250-500 hours should be checked or replaced, and clean the fuel tank and all oil pipes, pay attention to clean the filter element and seals should be careful, if there is damage should be replaced in time [^3^].
4. ** Craxle box ventilation system ** : Regularly clean up the dirt around the PCV valve to ensure that the pollutants in the exhaust gas will not accumulate around the valve, and avoid the polluted gas to the air filter and aggravate the engine wear [^4^].
5. ** Fuel system ** : clean the fuel system regularly to remove the colloid and carbon deposits in the oil circuit, injection nozzle and combustion chamber, so as to ensure the smooth flow of fuel and maintain the best air-fuel ratio [^4^].
6. ** Water tank ** : clean the water tank regularly to remove rust and scale, ensure the flow of coolant in the system, improve the heat dissipation efficiency, and prevent the engine from overheating [^4^].
7. ** Daily maintenance ** : including checking fuel tank fuel amount, oil pan oil plane, oil plane of injection pump governor, and eliminating oil leakage, water leakage phenomenon of sealing surface such as oil, water pipe joint; Check the installation of the accessories of the diesel engine, including the degree of installation stability and the firmness of the grounding screws and the connection with the working machinery [^5^].
In general, diesel engine maintenance requires a comprehensive consideration of multiple aspects, from the air filter, oil filter to fuel filter, to the crankcase ventilation system, fuel system and water tank, all requiring regular inspection and maintenance. At the same time, daily maintenance can not be ignored, such as checking the fuel amount, oil level, governor oil level and eliminating oil leakage, water leakage, air leakage and so on. Only comprehensive and meticulous maintenance can ensure the normal operation and prolong the service life of diesel engines.