1、 INSPECTION OF FUEL TANK:1) CHECK THE FUEL LEVEL IN THE FUEL TANK DAILY;2) CHECK THE MAINTENANCE INDICATOR OF THE AIR FILTER;3) CHECK THE MAINTENANCE INDICATOR ON THE AIR FILTER DAILY. IF THE INSPECTION WINDOW DISPLAYS RED, IT INDICATES THAT THE INTAKE RESISTANCE OF THE AIR FILTER EXCEEDS THE SPECIFIED VALUE AND THE FILTER ELEMENT NEEDS TO BE REPLACED. AFTER REPLACING THE FILTER CORE, THE BUTTON ON THE END OF THE MAINTENANCE INDICATOR MUST BE PRESSED TO RESET IT;MATTERS NEEDING ATTENTION:1) AFTER REPLACING THE AIR FILTER ELEMENT, ENSURE THAT BOTH ENDS OF THE AIR FILTER ARE RELIABLY SEALED AND THERE IS NO AIR LEAKAGE;2) NEVER OPERATE A DIESEL ENGINE WITHOUT AN AIR FILTER (EXCEPT FOR MARINE DIESEL ENGINES). OTHERWISE, IT IS HIGHLY LIKELY TO CAUSE EARLY WEAR AND TEAR OF THE DIESEL ENGINE;2、 DIESEL ENGINE OIL LEVEL INSPECTION:CHECK THE OIL LEVEL EVERY DAY BEFORE STARTING OR WHEN THE DIESEL ENGINE IS STOPPED (AT LEAST 15 MINUTES AFTER STOPPING TO ALLOW SUFFICIENT TIME FOR THE OIL TO FLOW BACK TO THE OIL PAN). THE OIL LEVEL SHOULD BE BETWEEN THE UPPER MARK (FUL) AND THE LOWER MARK (ADD) ON THE DIPSTICK. IF THE OIL LEVEL IS INSUFFICIENT, ADD OIL TO THE NEAR HIGH OIL LEVEL MARK;MATTERS NEEDING ATTENTION:NEVER OPERATE THE DIESEL ENGINE WHEN THE OIL LEVEL IS BELOW THE LOW OIL LEVEL. OTHERWISE, IT MAY LEAD TO POOR PERFORMANCE OF THE DIESEL ENGINE AND EVEN DAMAGE TO THE DIESEL ENGINE. BUT THE OIL LEVEL MUST NOT EXCEED THE UPPER MARKING FUL;