1、 Daily inspection and maintenance

1. Fuel and lubrication system
   • fuel tankCheck the fuel level daily, replenish clean fuel in a timely manner, and prevent impurities from entering the system.
   • Oil levelCheck the oil level in the oil pan to ensure that the oil level is within the range marked on the oil dipstick. If it is insufficient, add it to the specified amount, but not exceeding the upper limit.
   • Fuel injection pump speed controllerCheck the oil level and replenish it if it is insufficient to prevent wear on the governor.
   • lubricating greaseRegularly check the oil injection point of the water pump (such as the bearing body), and if it is insufficient, use an oil gun to inject calcium based grease or special lubricating grease, which occupies 70% of the bearing body space.
2. cooling system
   • Water tank capacityCheck if the water tank is sufficient, replenish clean fresh water (such as tap water or softened groundwater), and avoid using hard water that can cause scale buildup.
   • Antifreeze configurationIn cold northern regions, add antifreeze according to low temperatures to prevent the cooling system from freezing.
   • heat exchangerCheck the cooling water flow rate and control the water temperature between 85 ℃ and 95 ℃ by adjusting the ball valve to ensure the normal operation of the engine.
3. Electrical system
   • storage batteryCheck the electrolyte level daily (10-15mm above the electrode plate), and add dilute sulfuric acid or distilled water with a specific gravity of 1.400g/cm ³ if it is insufficient. Avoid using river water, well water, or concentrated sulfuric acid.
   • Starting systemCheck if the wiring of the electric starting circuit is secure and if the battery is fully charged to ensure smooth starting.
4. Sealing and leakage inspection
   • Three leakage inspectionCheck the oil pipes, water pipe joints, exhaust pipes, cylinder head gaskets, and turbocharger daily for oil, water, and gas leaks. If any leaks are found, they should be dealt with immediately.
   • pump sealCheck if the packing seal is worn and replace it if necessary; Observe whether the water pump body is overheated to prevent seal failure.

2、 Regular maintenance measures

1. Weekly maintenance
   • Pump room environmentClean the inside and outside of the pump room, ensure good ventilation (ordinary electric pump room ≥ 4 ℃, diesel pump room ≥ 21 ℃), and avoid dust and debris from entering.
   • Pump operationStart the water pump and run it for at least 30 minutes, check the outlet pressure, flow rate (the maximum flow rate should be 150% of the rated flow rate), and the reliability of the sealing ring.
   • Valves and pipelinesCheck whether the gate valve, check valve, and water hammer elimination device of the inlet and outlet pipelines are normal, remove debris at the inlet of the suction pipe, and prevent blockage.
   • power switchingTest the main and backup power switch function to ensure that the backup power can start the water pump within 30 seconds and the backup water pump automatically switches normally.
2. Monthly maintenance
   • Fire water pool and pneumatic equipmentCheck the water level, quality, and pressure of the fire water pool and water supply equipment to ensure sufficient water storage and no risk of freezing.
   • Instrumentation and ControlWipe the dashboard (pressure gauge, vacuum gauge, tachometer, etc.) to ensure that the indication is normal; Check the indicator lights, alarm signals, and backup power start function of the control cabinet.
   • Coupling alignmentCheck if the screws on the drive connection plate of the fuel injection pump are loose, recalibrate the fuel injection advance angle and tighten the screws to ensure that the coupling is aligned (radial displacement ≤ 0.1mm, angular displacement ≤ 0.15mm).

3、 Professional maintenance and in-depth inspection

1. Filter element and oil replacement
   • filter elementReplace the fuel filter and oil filter every 3 months or 100 hours to prevent impurities from entering the system.
   • engine oilChange the engine oil every 6 months or 500 hours, using specialized engine oil that meets the requirements of diesel engines.
2. Cooling system cleaning
   • Use professional cooling water cleaner to clean the cooling system, rinse it clean, and then add new coolant to prevent scale and corrosion.
3. Unit alignment detection
   • Regularly inspect the straightness (alignment) of the unit, adjust deviations caused by foundation sinking, bearing wear or thermal deformation, and ensure smooth operation of the unit.

4、 Long term shutdown management

1. anti-corrosion treatment
   • When shutting down for a long time, apply rust proof oil to metal parts such as diesel engines and water pumps to prevent them from getting damp and rusting.
   • Drain the fuel tank and pipelines to prevent gum buildup from blocking the oil circuit.
2. Regularly start
   • Start the water pump and run it for at least 30 minutes every month to maintain equipment lubrication and sealing performance, and prevent component jamming.