First-level car maintenance refers to maintenance operations centered on cleaning, lubrication, and fastening. It mainly involves cleaning internal sediments and inspecting safety-related components such as brakes and controls. These operations are performed by maintenance companies when the car has traveled between 1,500 km and 2,000 km. The tasks involved in first-level maintenance include: 1. Thoroughly washing the car to ensure the engine and chassis are free of oil and dirt after wiping; 2. Cleaning the engine oil, gasoline, and air filters; 3. Checking and adding lubricating oil to the engine oil pan, transmission, rear axle, and steering gear; 4. Lubricating the water pump, distributor, steering rod ball joint, clutch pedal bracket pin, drive shaft, front and rear leaf spring pins, and door components; 5. Inspecting and tightening connecting bolts and nuts on the engine, chassis, and exterior of the car body; 6. Checking and adjusting the drive belts of the air compressor and generator; 7. Inspecting and adjusting the free play of pedals, steering wheel clearance, front wheel bearings, and steering knuckles; 8. Checking and tightening the U-bolts of front and rear leaf springs, transmission, drive shaft, main reducer, and axle connecting bolts; 9. Inspecting the engine hood, radiator rods, louver control mechanism, and the doors, windows, and seats of the cab or passenger compartment.
