# Professional Guide to Daily Maintenance and Care of Loaders

As the primary equipment in engineering construction, the maintenance and care of loaders directly affect equipment lifespan and operational efficiency. According to statistics, standardized daily maintenance can reduce the failure rate by 40% and extend the overhaul cycle by 2,000 working hours. This guide will provide a detailed introduction to scientific maintenance methods for loaders. I. Pre-Operation Daily Inspection (15 minutes) Visual inspection: Walk around the machine to check for signs of oil or water leakage; check tire pressure (refer to the calibrated value ±10%); observe tire tread depth (not less than 5 mm); check the bucket and linkage for cracks or deformation. Fluid inspection: Engine oil (check 10 minutes after shutdown); hydraulic oil level (between the scale marks at an oil temperature of 40°C); coolant level (between MAX and MIN on the expansion tank); brake fluid level (not below the lower limit). Key component inspection: Tightness of drive shaft bolts; leakage at hydraulic line connections; lubrication status at all lubrication points; lighting, horn, and other electrical equipment. II. Key Points for Every 8 Hours of Maintenance Cleaning tasks: Remove debris from the radiator (use compressed air to blow in reverse); clean dust from the engine compartment (do not use a high-pressure water gun directly); clean the interior and exterior of the cab (keep the operating environment tidy). Lubrication maintenance: Steering joints (use lithium-based grease); bucket pins (3-5 strokes per lubrication point); drive shaft universal joints (until old grease is expelled). Function testing: Test whether all instruments are working properly; check braking performance (braking distance at 20 km/h ≤5 m); verify parking brake (hold for 5 minutes on a 15° slope). III. Weekly Maintenance Content (50 working hours) Fluid management: Drain water from the fuel tank; check engine oil contamination level (blotter paper method); test coolant freezing point (not higher than -35°C). Filter inspection: Clean the air filter (reverse blow with air pressure ≤0.5 MPa); check the sealing condition of the engine oil filter; observe water accumulation in the fuel filter. Key component inspection: Check brake pad thickness (not less than 5 mm); test steering system sensitivity (free play ≤15°); check tire bolt torque (standard value ±5%). IV. Monthly Maintenance Items (250 working hours) Fluid replacement: Replace engine oil and filter; replace hydraulic oil return filter element; check transmission oil level. System inspection: Test hydraulic system pressure (±5% of calibrated value); check hydraulic cylinder sealing condition; adjust engine belt tension. Electrical system: Clean battery terminals (apply petroleum jelly); check wiring harness insulation; test all safety alarm devices. V. Key Points for Seasonal Maintenance Summer maintenance: Clean the cooling system (improve cooling efficiency); switch to high-temperature hydraulic oil; check air conditioning cooling performance. Winter maintenance: Switch to low-temperature engine oil (5W-30); add fuel anti-gelling agent; install a battery insulation cover. VI. Maintenance for Long-Term Storage Pre-storage preparation: Thoroughly clean the interior and exterior of the equipment; fill each oil chamber with new oil to the standard level; apply anti-rust grease to exposed metal parts. During storage: Start and run for 30 minutes each month; periodically rotate tires to prevent deformation; recharge the battery monthly. Pre-commissioning inspection: Replace all oil and filters; check the sealing condition of all systems; test braking system performance. VII. Maintenance Precautions Safety regulations: Perform maintenance after shutting down and turning off the engine; use dedicated tools; properly recycle and dispose of fluids. Parts selection: Use original factory filters; select oil according to the specified grade; use the designated grease for key components. Record management: Establish maintenance files; record information on replaced parts; keep oil testing reports. Professional advice: Implement the "five fixed" maintenance system (fixed points, fixed personnel, fixed timing, fixed standards, fixed records). After a certain construction site adopted this method, equipment availability increased from 82% to 98%, and maintenance costs decreased by 35%. By strictly implementing these maintenance specifications, your loader will always remain in optimal working condition. Remember: the cost of preventive maintenance is only 1/6 of breakdown repair, making it the most economical investment in equipment management. It is recommended to incorporate the maintenance plan into daily management assessments to ensure full implementation of the specifications.