What is the reason for insufficient air supply of air compressor

Trouble phenomenon: When the engine is running and the air compressor is inflating the air tank, the air pressure indicator indicates that the air pressure cannot reach the starting pressure value.

Cause of failure:

1. Failure of barometer

2. The transmission belt between the air compressor and the engine is too loose and causes slippage, or the pipeline between the air compressor and the air storage tank is broken and the joint leaks.

3. Excessive deposits in the oil-water separator, pipeline or compressed air filter cause blockage.

4. The air compressor exhaust valve is not tightly sealed, the spring is too soft and broken, the air compressor cylinder head bolts are loose, sand holes and cylinder head gasket are damaged and air leakage.

5. The cylinder liner and piston ring of the air compressor are seriously worn, resulting in air leakage.

Fault diagnosis and troubleshooting methods:

1. Observe the barometer to determine whether it is a barometer problem. When the barometer indicates that the air pressure is insufficient, you can let the engine run at a medium speed for a few minutes, and the pressure still does not rise or rises slowly. When the brake pedal is stepped on, the sound of deflation is very strong, indicating that the barometer is damaged. At this time, the barometer should be repaired.

2. If the above test does not have the sound of deflation or the sound of deflation is very small, it is necessary to check whether the belt of the air compressor is too loose, from the air compressor to the air tank, to the intake pipe of the control valve, and whether the joints are loose, cracked or leaking.

3. If the air compressor does not inflate the air storage tank, it is necessary to check the oil-water separation and compressed air filter and whether there are pollutants in the pipeline that cause blockage. If it is because of blockage, the pollutants should be removed in time.

4. After the above inspection, if the cause of the failure cannot be found, then it is necessary to further check whether the exhaust valve of the air compressor is leaking, whether the spring is too soft or even broken, and whether the cylinder head and gasket are damaged. Replace and repair damaged parts.

5. Check whether the cylinder liner and piston ring of the air compressor are seriously worn.

6. Check and adjust whether the installation direction of the unloading valve is consistent with the marked arrow direction.