Generally, it is carried out when the vehicle travels to 1500~2000km, mainly for fastening and lubrication.

1, clean the car, and the engine and chassis should be free of oil stains after wiping.

2. Clean the engine oil, gasoline (or diesel oil) and air filter, remove or eliminate the deposits in the filter, and remove the oil in the oil storage pipe.

3. Check and add lubricating oil to the engine oil pan, transmission, rear axle and steering gear to make the lubricating oil level reach the standard position.

4. Lubricate the water pump, distributor, steering rod ball pin, clutch pedal bracket pin, rotating shaft, front and rear leaf spring pins, doors and other lubrication parts (according to the lubrication points specified in the operating instructions of each vehicle), and complete the nozzles of each lubrication point.

5. Check and tighten the connecting bolts and nuts outside the engine, chassis and body. Each locking device shall be equipped according to the specified specifications and quantity, and shall be securely fastened.

6. Check and adjust the tightness of drive belts such as air compressors and generators.

7. Check and adjust the free deformation of pedal and the clearance between steering wheel and front wheel bearing and steering knuckle; Check and adjust the connection of tie rod, the side slip of front wheel and the braking performance of the car.

8. Check and tighten the U-shaped bolts of the front and rear leaf springs and the connecting bolts of the transmission, transmission shaft, main reducer and half shaft.

9, check the hood, radiator pull rod and shutter operating mechanism, cab or bus door and window seat.

10, check tire appearance, tire pressure and inflation.

1 1, check whether the electrical system, such as generator, starter and various instruments work normally; Check whether the battery liquid level and shell are leaking and whether the air holes are unobstructed. The electrolyte should be higher than the electrode plate 10~ 15mm, and the battery filler plug should be complete.

12. Check the fixing of the spare tire elevator and spare tire, and lubricate all parts of the spare tire elevator.

13. Eliminate faults and defects found during inspection.

Secondary maintenance

Mainly to check and adjust. Secondary maintenance is to check and adjust the technical condition of vehicles that have driven for a certain mileage, so as to keep good running performance of vehicles for a long time.

1, all the contents of primary maintenance.

2. Measure the cylinder pressure of the engine and adjust the valve clearance.

3. Clean all filters, oil pan and float components of the filter collector.

4, check and adjust the connecting rod bearing wear and clearance.

5. Check and tighten the engine front and rear bracket bolts.

6, check and adjust the brake, tire transposition.

7. Check and adjust the working condition of the clutch, and check other components that need to be adjusted.