1. Fuel Treatment: Prevent Deterioration and Blockage

• Drain all fuel (recommended for storage over 6 months): Run the generator at no load until the fuel tank is empty and the engine stops automatically, ensuring that there is no residual diesel in the fuel tank, fuel pipelines, and injectors. After draining, close the fuel valve to prevent air and moisture from entering the fuel system. The drained diesel can be filtered and reused if it is not deteriorated; otherwise, it should be properly disposed of according to environmental protection requirements.

• Add fuel stabilizer (suitable for storage within 3-6 months): If it is not convenient to drain the fuel, add a professional diesel stabilizer (in strict accordance with the product manual ratio) to the fuel tank, then run the generator at no load for 10-15 minutes to ensure the stabilizer is fully mixed with the diesel. The stabilizer can inhibit fuel oxidation, prevent colloid formation, and keep the fuel in good condition during storage.

2. Oil Replacement and System Protection: Avoid Wear Caused by Deteriorated Oil

• Replace engine oil: Run the generator for 5-10 minutes to make the engine oil warm (facilitate full discharge of impurities), then shut down and drain the old engine oil completely. Replace it with new engine oil that meets the specifications, and ensure the oil level is within the standard scale. The new oil can form a protective film on the surface of engine components, preventing rust and corrosion during storage.

• Replace oil filter: Synchronously replace the oil filter while changing the engine oil to avoid impurities remaining in the old filter from polluting the new oil and affecting the protection effect.

3. Battery Protection: Prevent Power Loss and Damage

• Disconnect the battery: First, fully charge the battery (ensure the charge is above 80%), then disconnect the negative electrode cable (to avoid self-discharge and electrical system leakage). For units with two batteries connected in series (24V), disconnect the negative electrode of each battery separately and做好 insulation protection of the terminals to prevent short circuits caused by contact with metal parts.

• Regular supplementary charging: If the storage period exceeds 1 month, it is recommended to charge the battery once a month (use a dedicated charger, adopt constant current and constant voltage charging mode) to maintain the battery charge at 70%-80%. In low-temperature environments (below 0℃), the charging frequency should be increased to once every 2 weeks to avoid battery damage caused by low temperature and power loss.

• Storage of disassembled batteries: If the battery is disassembled for storage, place it in a dry, ventilated and cool place, avoid direct sunlight and high temperature, and do not place it upside down or tilt it significantly.

4. Cover and Moisture-Proof: Prevent Corrosion and Component Damage

• Clean the unit before storage: Wipe the surface of the generator with a dry cloth to remove dust, oil stains and water stains, especially the electrical control panel, terminals and other parts, to avoid moisture causing short circuits.

• Professional covering: Use a special generator cover (waterproof, dustproof, corrosion-resistant) to fully cover the unit, ensuring that the cover is tightly fitted and there is no gap. Do not use plastic cloth directly to cover the unit, because plastic cloth is not breathable, which will easily cause moisture to accumulate inside and accelerate corrosion.

• Moisture-proof in the storage environment: Place a moisture-proof agent (such as silica gel desiccant) around the unit, especially in humid areas, to absorb ambient moisture and keep the air dry.

5. Regular Crankshaft Turning: Avoid Component Seizure

• Operation frequency: Turn the crankshaft once every 15-30 days. For units with manual crankshaft turning, use a crank to turn the engine crankshaft 2-3 full circles (clockwise) to make the engine oil evenly distribute on the surface of each friction component, forming a protective film.

• Key points: Before turning the crankshaft, ensure the generator is shut down, the power supply is disconnected, and the fuel valve is closed to avoid accidental startup. If the crankshaft is difficult to turn, do not force it to avoid component damage; check whether there is rust or jamming and deal with it in time.

6. Storage Environment Requirements: Ensure Long-Term Stability

• Dry and ventilated: The storage room should be well-ventilated to avoid moisture accumulation; the relative humidity should be controlled below 60%, and avoid storing in basements, low-lying areas or places prone to water accumulation.

• Constant temperature: The ambient temperature should be kept between 5℃ and 25℃. Avoid long-term storage in extreme high temperature (above 40℃) or extreme low temperature (below -20℃), which will accelerate the aging of rubber parts and damage the battery.

• 远离 harmful substances: Keep the unit away from corrosive gases (such as sulfur dioxide), chemicals, and flammable and explosive materials to avoid corrosion of metal components and potential safety hazards.

• Anti-theft and anti-collision: Place the unit in a safe and fixed position, avoid collision and damage to components; for mobile units, lock the wheels and fix the trailer to prevent theft or displacement.

7. Professional Storage Notes

• Before storage, conduct a comprehensive inspection of the generator, check for oil leakage, water leakage, and loose components, and repair them in time to avoid deterioration of faults during storage.

• Record the storage start time, maintenance items (fuel treatment, oil replacement, etc.) and battery charging time to facilitate subsequent inspection and restart.

• When restarting after long-term storage, first check the fuel, oil, battery, and electrical system, then run the generator at no load for 10-15 minutes to check the operation status, and load it after confirming normal operation.

• For generators stored for more than 1 year, in addition to the above measures, it is recommended to disassemble and inspect key components (such as injectors, fuel pumps) before restarting to ensure they are in good condition.

Summary