In the normal operation of the air compressor, some failures cannot be avoided. So what should we do if the compressor fails, and what is the cause of this failure? then, let's watch it together compressor repair reasons and corresponding measures.

1. Lack of air pressure in the air compressor

cause:
1. The barometer fails;
2. The transmission belt between the air compressor and the motor is loose and slipped, or the pipeline between the air compressor and the air storage tank is broken or the joint leaks;
3. The oil-water separator, pipeline or air filter has too much sediment and is blocked;
4. The air compressor exhaust valve is not tightly sealed, the tension spring is too soft or broken, the cylinder head bolt of the air compressor is loose, the blisters and the cylinder head gasket are damaged and the air leaks;
5. The cylinder liner, piston and piston ring of the air compressor are too worn or even leaked.
Repair method:
1. Investigate the air pressure gauge. If the indicated pressure is insufficient, let the motor run at 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 intense, indicating that the air pressure gauge is damaged. Correct the barometer;
2. If there is no or very little sound of deflation in the above test, check whether the drive belt of the air compressor is loose, from the air compressor to the air storage tank to the air inlet pipe of the control valve, whether the joints are loose, cracked or leaked;
3. If the air compressor does not inflate the air storage tank, check whether the oil separator, the air filter and the pipeline are too much dirt and blocked. If it is blocked, the dirt should be removed;
4. It is necessary to further check whether the exhaust valve of the air compressor is leaking, whether the tension spring is too soft or broken, whether the cylinder head has blisters, and whether the gasket is damaged, and replace or correct the damaged parts according to the faults found;
5. Check whether the cylinder liner and piston ring of the air compressor are excessively worn, and check and adjust whether the installation direction of the unloading valve is the same as the direction of the marking (arrow).

2. Air compressor overheating

cause:
1. The unloading valve or unloading valve does not work, resulting in no rest of the air machine;
2. The serious leakage of the air brake system causes the air compressor to stop working;
3. Lack of oil supply and cylinder pulling at the working part;
4. The power supply voltage is too high or too low;
5. The ambient temperature is too high or it is exposed to direct sunlight outdoors.
Repair method:
1. Check the pressure supply valve assembly when the intake air is unloaded. If there is a stuck one, clean and remove or replace the failed part; when the exhaust is unloaded, check the unloading valve.
2. Check the brake system components and pipelines, and replace the faulty parts;
3. Poor smoothness between the piston and the cylinder liner, too small clearance or pulling the cylinder can lead to overheating. In this case, check, correct or replace the failed parts;
4. Adjust the power supply voltage;
5. Ventilate, avoid direct sunlight, reduce operations or implement continuous work.

3. Abnormal noise of air compressor

cause:
1. The connecting rod bush is severely worn, the connecting rod bolt is loose, the connecting rod bushing is severely worn, and the main shaft is severely worn or damaged, resulting in impact sound;
2. The transmission belt is loose, and the grooves of the main and forced transmission belts do not match, resulting in slippage and whistling;
3. After the air compressor is running, there is no immediate oil supply, and the metal conflict will whistle;
4. The fixing bolts are loose;
5. The tightening gear nut is loose, resulting in excessive backlash and knocking sound;
6. There is a foreign body on the top of the piston;
7. The motor bearing is worn.
Repair method:
1. Check whether the connecting rod bush, connecting rod bushing and main bush are worn, strained or burned, whether the connecting rod bolt is loose, and check whether the main oil passage of the air compressor is clear; it is recommended to replace the severely worn or strained bearing bush, bushing Sleeve, main bush, tighten the connecting rod bolts (torque specification 35~40N.m), when reassembling, pay attention to the orientation of the main shaft bearing device;
2. Check whether the grooves of the main drive pulley and the forced drive pulley are the same, if not, please replace it, and adjust the tightness of the drive belt (press the drive belt with your thumb, and the interval between pressing the drive belt should be 10mm);
3. Check the oil inlet pressure of the lubricating oil and whether the oil pipeline is damaged or blocked. If the pressure is insufficient, the failed pipeline should be adjusted, sorted out, and replaced immediately; ; Check whether the air compressor is supplied with oil, if there is no oil supply, a comprehensive inspection should be carried out immediately;
4. Check whether the fixing bolts of the air compressor are loose and tighten them;
5. The gear-driven air compressor should also check whether the gears are loose or the cooperation status of the gear device. If the nut is loose, tighten the nut. If there is a problem with the cooperation, it should be replaced;
6. Remove foreign bodies;
7. Replace the motor bearing.

Fourth, the air compressor is not encouraging

cause:
1. The power supply has no voltage;
2. The contactor is faulty;
3. The release valve of the air compressor is stuck, and the valve plate is deformed or cracked;
4. Excessive carbon deposits at the intake and exhaust ports;
5. The air compressor motor is burnt;
6. The transmission organization is stuck.
Repair method:
1. Check the power supply voltage;
2. Check the working circuit of the contactor to remove the fault or replace the contactor;
3. Check the relief valve assembly, clean and replace the failed parts, disassemble and inspect the cylinder head, check the valve plate, and replace the deformed and cracked valve plate;
4. Disassemble and inspect the cylinder head, and sort out the valve seat plate and valve plate;
5. Repair the fault of the motor or replace the motor;
6. Check the repair transmission organization.

5. The compressor does not load

cause:
1. The pressure on the gas pipeline exceeds the rated load pressure, and the pressure regulation is disconnected;
2. The solenoid valve fails;
3. There is leakage in the control pipeline between the oil and gas separator and the unloading valve.
Repair method:
1. There is no need to take measures. When the pressure on the gas pipeline is lower than the loading (position) pressure of the pressure regulator, it will be automatically loaded at the time of compression;
2. Remove the solenoid valve to check and replace if necessary;
3. Check the pipeline and joints, if there is leakage, it needs to be repaired.

6. The air compressor consumes too much fuel

cause:
1. The oil level is too high;
2. The oil and gas separation filter element fails;
3. Too much foam;
4. The restrictor hole at the joint of the oil return pipe of the oil and gas separator filter element is blocked;
5. Use the wrong oil.
Repair method:
1. Check the oil level, remove the pressure and drain the oil to the normal position;
2. Remove and check or replace the filter element;
3. Replace the oil with the appropriate trademark;
4. Clean the restrictor hole;
5. Replace the oil with the appropriate brand.