1、 OIL FILTER:ENGINE OIL MAY CONTAIN SOME IMPURITIES AND PARTICLES DURING USE, INCLUDING PARTICLES GENERATED BY FRICTION, DEBRIS LEFT BEHIND BY UNCLEAN PARTS, AND EARLY OXIDATION AND DETERIORATION PARTICLES GENERATED BY HIGH TEMPERATURES IN CERTAIN AREAS. THESE PARTICLES INCLUDE IRON PINS, SAND PARTICLES, RUBBER PARTICLES, ETC. MIXING WITH ENGINE OIL CAN CAUSE FRICTION SIDE EFFECTS, DAMAGE, AND EVEN TILE BURNING, REDUCING SERVICE LIFE AND RELIABILITY. DIESEL ENGINES MUST USE FACTORY OIL FILTERS, WHICH MAINLY USE PAPER FILTERS TO FILTER OUT IMPURITIES IN THE OIL THROUGH FILTER PAPER. SOME FILTERS CAN BE DIVIDED INTO COARSE FILTERS AND FINE FILTERS, WHICH CAN FILTER OUT 100% OF PARTICLES WITH A DIAMETER OF 0.040MM, 99% OF PARTICLES WITH A DIAMETER OF 0.030-0.040MM, AND PARTICLES WITH A CONCENTRATION LOWER THAN 0.030MM CAN ALSO CAUSE ENGINE OIL DETERIORATION IF THE CONCENTRATION IS TOO HIGH; PARTICLES LARGER THAN 0.010MM CAN BE FILTERED OUT BY 100%, AND PARTICLES LARGER THAN 0.005MM CAN BE FILTERED OUT BY 94.2%. IF A LOW-QUALITY OIL FILTER IS USED, IT MAY CLOG OR INCREASE RESISTANCE DURING USE, CAUSING A DECREASE IN OIL PRESSURE IN THE MAIN OIL PASSAGE AND INSUFFICIENT OIL IN THE MAIN BEARING, RESULTING IN SERIOUS CONSEQUENCES.2、 DIESEL FILTER:THE DIESEL FILTER MAINLY FILTERS OUT DUST AND IMPURITIES THAT ENTER THE FUEL PUMP, AS THESE DUST AND IMPURITIES CAN DAMAGE COMPONENTS SUCH AS THE FUEL PUMP AND INJECTORS. THEREFORE, USERS MUST CHOOSE HIGH-QUALITY AND STANDARD DIESEL FILTERS.3、 WATER GRID:THE COOLANT SHOULD BE FILTERED BECAUSE IT CONTAINS SEDIMENT, DUST, OIL AND SCALE, PROCESSED IRON, RUST DEPOSITS, SETTLED PROTECTIVE AGENTS, AND DETERIORATED GASKET DEBRIS. THESE DIRTY THINGS ACCUMULATE IN THE ENGINE, ESPECIALLY AFTER A CERTAIN PERIOD OF STORAGE (THE SUPPLEMENTARY WATER ALSO CONTAINS DUST, SEDIMENT, ETC.), WHICH CAN HINDER THE OPERATION OF THE THERMOSTAT, CONTAMINATE AND BLOCK THE WATER PIPES IN THE OIL COOLER, BLOCK THE RADIATOR (WATER TANK), HOSES, PIPELINES, AND COOLING WATER CHANNELS IN THE CYLINDER BLOCK. METAL SHAVINGS SUCH AS SEDIMENT AND WATER SCALE MAY CAUSE WEAR ON THE IMPELLER AND SHAFT OF THE WATER PUMP, DAMAGE TO THE CYLINDER LINER SEALING RING, WEAR ON THE WATER PUMP END FACE SEAL AND THERMOSTAT. THESE PARTICLES, ALONG WITH METAL SHAVINGS, SEAL FRAGMENTS, ETC., IF INSERTED INTO THE THERMOSTAT, WILL PREVENT IT FROM OPENING AND CLOSING AGAIN. THEREFORE, A STANDARD WATER FILTER MUST BE SELECTED AND REPLACED REGULARLY.4、 AIR FILTER:THE DIESEL ENGINE (USED FOR GENERATOR SETS) ADOPTS ORDINARY LIGHTWEIGHT SINGLE-STAGE DRY AIR FILTERS. THE HIGH-QUALITY STANDARD FILTER ELEMENT IS MADE OF SPECIALLY TREATED FILTER PAPER, WHICH CAN BE REPLACED AND HAS AN EFFICIENCY OF UP TO 99.5%. FRESH AIR ENTERS THE AIR FILTER FROM AROUND IT, AND THE AIR REQUIRED FOR DIESEL ENGINE COMBUSTION ALSO DEPENDS ON THE AIR FILTER. THEREFORE, THE SMALLER THE RESISTANCE OF THE AIR FILTER, THE BETTER. AFTER USING THE AIR FILTER FOR A CERTAIN PERIOD OF TIME, THE FILTER ELEMENT WILL BECOME DIRTY AND THE RESISTANCE WILL INCREASE ACCORDINGLY. IF THE RESISTANCE INCREASES BEYOND THE SPECIFIED VALUE, THE DIESEL ENGINE WILL NOT RECEIVE ENOUGH AIR FOR COMBUSTION, RESULTING IN SMOKING, INSUFFICIENT POWER AND OTHER PHENOMENA. THE AIR RESISTANCE INDICATOR INSTALLED ON THE INTAKE CAN INDICATE WHETHER THE AIR RESISTANCE IS NORMAL. IF THE RESISTANCE EXCEEDS THE SPECIFIED VALUE, THE INDICATOR WILL CHANGE FROM NORMAL GREEN TO ABNORMAL RED. AT THIS TIME, THE FILTER SHOULD BE REPLACED, AND THEN PRESS THE END OF THE INDICATOR TO RESTORE ITS GREEN COLOR.5、 ENGINE OIL:USING HIGH-QUALITY ENGINE OIL AND ADOPTING APPROPRIATE OIL AND OIL FILTER REPLACEMENT INTERVALS ARE IMPORTANT FACTORS IN EXTENDING THE SERVICE LIFE OF DIESEL ENGINES.THE FUNCTION OF ENGINE OIL:1. THE ENGINE OIL USED IN HIGH-SPEED DIESEL ENGINES MUST BE MULTIFUNCTIONAL AND HAVE THE FOLLOWING MAIN FUNCTIONS:LUBRICATION: PROVIDE OIL FILM LUBRICATION BETWEEN MOVING PARTS TO REDUCE FRICTION AND WEAR.COOLING: AS A HEAT MEDIUM, IT TAKES AWAY HEAT FROM THE INTERFACE AND PLAYS A COOLING ROLE.SEALING: FILL THE CYLINDER WALL, UNEVEN SURFACES ON THE VALVE STEM, AND PROVIDE SEALING IN THE OIL SEAL OF THE TURBOCHARGER.CLEANING: SUSPEND DIRT IN IT TO PREVENT THE FORMATION OF SCALE ON THE SURFACE OF ENGINE PARTS, THUS ACHIEVING A CLEANING EFFECT.DAMPING AND BUFFERING EFFECTS: ESPECIALLY FOR HIGH-PRESSURE COMPONENTS SUCH AS GEARS AND PUSH RODS.PREVENTING OXIDATION AND CORROSION: PROVIDING PROTECTION FOR PARTS.2. WHEN THE ENGINE OIL IN THE DIESEL ENGINE LOSES ITS ABOVE-MENTIONED FUNCTIONS, IT MUST BE REPLACED. UNDER NORMAL CIRCUMSTANCES, ENGINE OIL IS RARELY LOST, BUT IT IS EASILY CONTAMINATED, THEREBY LOSING ITS PROTECTIVE FUNCTION FOR THE DIESEL ENGINE. OIL POLLUTION IS A NORMAL RESULT OF DIESEL ENGINE OPERATION. BECAUSE DURING THE OPERATION OF THE DIESEL ENGINE, MANY POLLUTANTS ENTER THE ENGINE OIL. THEY ARE BYPRODUCTS OF DIESEL ENGINE COMBUSTION: ASPHALT LEAN, SOOT, AND ACIDS PRODUCED BY INCOMPLETE COMBUSTION OF FUEL. ACID, CARBON DEPOSITS, AND SCALE DEPOSITS: GENERATED DUE TO THE CRACKING, DECOMPOSITION, OR OXIDATION OF ENGINE OIL.DIRT: DIRT THAT ENTERS THE DIESEL ENGINE THROUGH INTAKE, FUEL, AND WHEN ADDING OR CHANGING ENGINE OIL.  3. PERFORMANCE SPECIFICATIONS OF ENGINE OILTHE CF-4 AND SAE15W-40 LEVELS CLASSIFIED BY API (AMERICAN PETROLEUM INSTITUTE) ARE CURRENTLY THE LEVELS DESIGNATED BY THE AMERICAN PETROLEUM INSTITUTE FOR HIGH-SPEED DIESEL ENGINES.6、 COOLANT:THE COOLING WATER USED FOR DIESEL ENGINES SHOULD BE CLEAN AND FREE OF CORROSIVE COMPOUNDS SUCH AS CHLORIDES, SULFATES, AND ACIDS. THE WATER SHOULD BE SLIGHTLY ALKALINE WITH A PH VALUE BETWEEN 8.5-10.5, AND DCA ANTI RUST WATER SHOULD BE ADDED IN A CERTAIN PROPORTION.