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As the core component of a loader, the engine's operating condition directly impacts the machine's overall efficiency, fuel consumption, and service life. Under high-load, extended-operation conditions, scientific and standardized engine maintenance is particularly crucial. To assist users in better managing equipment status, this article summarizes key points for daily and periodic maintenance of loader engines based on actual operating conditions, for reference.
I. Standard Management of Engine Oil and Filters Engine oil is vital for normal engine operation. It is recommended to change the oil every 200 hours or quarterly based on equipment usage intensity. In harsh conditions such as high dust or heavy loads, this interval may be shortened to every 100 hours. The oil filter should be replaced simultaneously to prevent contaminants from circulating within the system and causing wear to internal components. For the fuel system, clean or replace the fuel filter every 200 hours to maintain fuel cleanliness and prevent fuel line blockages. Inspect the air filter every 50 hours. Clean or replace it promptly when dust accumulation exceeds 50% of the filter capacity, especially in dusty environments like mining or earthmoving operations where inspection frequency should be increased. II. Key Maintenance Points for the Cooling System The condition of the cooling system directly impacts engine operating temperature and stability. In winter, use antifreeze with a freezing point below the local minimum temperature, and replace it annually to prevent corrosion or freezing damage to the cooling system. Additionally, regularly clean mud, oil residue, and other deposits from the radiator and cooling tank surfaces. A comprehensive cleaning every 600 hours is generally recommended to ensure heat dissipation efficiency and avoid power loss or premature component failure due to overheating. III. Phased Regular Maintenance Schedule To ensure long-term stable engine operation, establish a clear phased maintenance mechanism:
50-Hour Inspection: Tighten drive shaft bolts, check transmission fluid level and brake fluid volume, lubricate hinge points, bearings, and other components.
IV. Maintenance Recommendations for Special Conditions In low-temperature environments: Use diesel with a cold filter plugging point below ambient temperature. Regularly clean the fuel/water separator and tank sediment to prevent fuel line freezing. Simultaneously monitor the condition of the water pump and seals to prevent coolant from entering the oil system. In high-temperature operating environments, intensify monitoring of coolant levels and avoid prolonged high-load engine operation. When shutting down, it is recommended to idle the engine for a period to allow temperatures to drop before turning it off, thereby reducing thermal shock impact on the engine. V. Standardized Operation and Daily Inspection Before starting the equipment, inspect for oil, water, or air leaks, and confirm that gauges, lights, and tires are in normal condition. During operation, closely monitor parameters such as engine sound, coolant temperature, and oil pressure. Shut down immediately and investigate any abnormalities. After completing work, check the oil level, clean the air filter and remove dust from the machine body, and maintain detailed maintenance records to provide data for future servicing. Scientific maintenance of loader engines is a systematic endeavor encompassing multiple aspects: oil management, filter maintenance, cooling system upkeep, and standardized operation. Establishing clear maintenance schedules and strictly adhering to maintenance standards not only significantly extends engine lifespan but also effectively enhances equipment operational efficiency while reducing overall operating costs. Consistent, standardized maintenance management forms the critical foundation for ensuring the long-term stable operation of loaders.
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