1. ONLY KNOW HOW TO CLEAN THE AIR FILTER, IGNORE THE INTAKE SHORT CIRCUIT. AFTER THE LOSS OF THE INTERNAL GASKET OF SOME USERS' CLEAN AIR FILTERS, OR THE SEALING GASKET OF THE INTAKE PIPE JOINT, WITHOUT PRE-TREATMENT, THE HOSE ENDS ARE CLAMPED, AND THE HOSE RUPTURES, IT WILL CAUSE A SHORT CIRCUIT OF AIR. WITHOUT AN AIR FILTER, IT EXACERBATES THE WEAR OF COMPRESSION SYSTEM COMPONENTS.2. ONLY ADJUST THE VALVE CLEARANCE AND IGNORE THE TIMING OF GAS DISTRIBUTION. MOST USERS ADJUST THE VALVE CLEARANCE ACCORDING TO THE STANDARD VALUE, IGNORING THAT THE CHECK VALVE TIME IS CORRECT, ESPECIALLY FOR AGING MACHINES. DUE TO THE GEOMETRIC SHAPE CHANGES CAUSED BY CAM WEAR, THE OPENING AND CLOSING OF VALVES IN THE LATER STAGE LEADS TO INSUFFICIENT INTAKE, EXHAUST, FUEL CONSUMPTION, AND POWER REDUCTION. THEREFORE, WHEN ADJUSTING THE VALVE CLEARANCE OF AGING MACHINES, THE PHASE ERROR COMPENSATION GAS DISTRIBUTION OF THE VALVE CLEARANCE VALUE SHOULD BE APPROPRIATELY REDUCED TO ACHIEVE THE TIMING OF VALVE TIMING.3. ONLY FOCUS ON THE OIL PAN AND IGNORE ITS QUALITY. THIS DEPENDS ON THE QUALITY OF THE OIL AND ITS REGULAR REPLACEMENT. USING ENGINE OIL, WHICH CONTAINS A LARGE AMOUNT OF OXIDIZING SUBSTANCES AND METAL FRAGMENTS, DETERIORATES LUBRICATION PERFORMANCE AND AGGRAVATES WEAR ON COMPONENTS AND ASSEMBLIES. TO ACHIEVE THIS, ALWAYS CHECK THE QUALITY OF THE OIL.4. PAY ATTENTION ONLY TO THE QUALITY OF THE PLUNGER AND NOZZLE, AND IGNORE THE TECHNICAL STATUS OF THE OIL VALVE. AFTER THE OIL DISCHARGE VALVE WEARS OUT, THE REMAINING PRESSURE OF THE HIGH-PRESSURE OIL PIPE IS TOO HIGH, AND OIL DROPLETS FALL ON THE NOZZLE AND ENGINE KNOCKING, WHICH IS UNSTABLE AT HIGH AND LOW SPEEDS. THEREFORE, IF THERE IS NO DETECTOR TO CHECK AND ADJUST THE INJECTION QUALITY, THE AVAILABLE METHOD IS TO FLUSH THE AIR, DIESEL, AND DIESEL NOZZLES AT THE OUTLET OF THE HIGH-PRESSURE OIL PUMP, QUICKLY INVERT THE FLYWHEEL HALFWAY, AND OBSERVE THE DECREASE OF UNQUALIFIED DIESEL.5. PAY ATTENTION ONLY TO THE VALVE SEAT, WHETHER IT IS GOOD OR BAD, AND IGNORE THE QUALITY OF THE VALVE SPRING. WHEN THE VALVE LEAKS, THE ENGINE ONLY CHANGES THE VALVE AND SEAT, AND RARELY CHECKS THE SPRING TENSION. IN FACT, AFTER THE ELASTICITY WEAKENS, THE VALVE GRADUALLY CLOSES, AND THE VALVE IS NOT TIGHTLY SEATED OR LEAKING AIR, RESULTING IN INSUFFICIENT CYLINDER PRESSURE AND DETERIORATION OF DIESEL ENGINE OPERATION.6. ONLY CLEAN THE CORE OF THE OIL FILTER, NEGLECTING THE CLEANING OF THE OIL CHAMBER. THE CONNECTING SHAFT NECK OF VOLVO DIESEL GENERATOR SETS IS USUALLY HOLLOW, WITH OIL BLOCKS AT BOTH ENDS. IT IS CALLED A CLEAN ROOM. THE LUBRICATING OIL OF THE CONNECTING ROD BEARING AND THE INFLUENCE OF CENTRIFUGAL FORCE UNDER THE WALL OF THE CAVITY ARE USED TO IMPROVE THE LUBRICATION QUALITY. GENERALLY SPEAKING, AFTER 500 HOURS OF WORK (REFORM), IT IS NECESSARY TO REMOVE OIL PLUGS, CLEAN, CLEAN CHAMBERS, AND IMPURITIES IN THE OIL LANE.7. ONLY CLEAN THE COMBUSTION CHAMBER COKE, IGNORE CLEANING THE EXHAUST PIPE. SOME USERS HAVE CONCERNS ABOUT COCA COLA EXHAUST PIPES AND MUFFLERS, SUCH AS THICK CARBON DEPOSITS, REDUCED CROSS-SECTIONAL AREA OF EXHAUST CHANNELS, OBSTRUCTED EXHAUST, UNCLEAN EXHAUST GAS, AND INSUFFICIENT INTAKE OF NEW AIR FOR COMBUSTION DUE TO DETERIORATING ENGINE OVERHEATING.SOME COMMON MISTAKES IN USER MAINTENANCE, ABNORMAL SITUATIONS IN THE CONSTRUCTION OF MAINTENANCE AND ADJUSTMENT FIELDS, AND THE EXISTENCE OF SPECIAL DIESEL GENERATORS, MAY EXACERBATE THE "CONDITIONS" OF THE UNIT WHEN IT IS RESTORED TO A GOOD STATE OF USE. IMPROPER MAINTENANCE AND OPERATION MAY WORSEN THE STARTING POINT OF THE OPPOSITE. WE HOPE TO MASTER THE CORRECT MAINTENANCE METHODS.