What is the reason for oil leakage in the air compressor?

First, the oil seal of the air compressor falls off or the oil seal is defective (such as wear, etc.) and causes oil leakage.

Second, the main shaft of the air compressor is loose, causing the oil seal to leak.

Third, the joint surface of the air compressor head leaks, and the joints of the oil inlet pipe and the oil return pipe are loose.

Fourth, the belt is installed too tightly during the installation of the air compressor, causing the main bearing to wear.

Fifth, the casting or processing is incomplete during the production of the air compressor.

Let’s analyze the treatment methods in accordance with these five possible reasons:

First, check the oil seal of the air compressor to confirm whether the oil seal is cracked, whether the inner lip is cracked or flanging. If there is any of the above conditions, it should be replaced; check whether there are scratches and defects on the joint surface between the oil seal and the main shaft. If there are scratches and defects, it should be replaced. Secondly, check whether the oil return is unobstructed. If the oil return is not smooth, the crankcase pressure is too high, causing the oil seal to leak or fall off. Ensure the minimum diameter of the oil return pipe, and do not twist or bend, and the oil return is smooth. Check the matching size of the oil seal and the housing, and replace those that do not meet the standard.

Second, move the main shaft with force to check whether the neck clearance is too large. If the clearance is too large, the bearing and oil seal should be replaced at the same time. As for how large is too large, each brand is different. The spacing of Fuda is generally about 1 cm.

Third, check the sealing of the gaskets at each joint of the air compressor, repair or replace the gaskets; check whether the inlet and return oil joint bolts and the housing threads are loose, and ensure that they are not loose. The working environment of some air compressors may be relatively harsh, and the upper and lower fuselages may be covered with oil. This requires our air compressor repair master to work hard and clean the air compressor first.

Fourth, check and readjust the tightness of the entire belt of the air compressor head. It is advisable to press 10 mm with your thumb. If it is too large or too small, it must be adjusted. This is the easiest to ignore, so students should pay attention to it. Fifth, check the defects in the casting or processing of the air compressor casing (such as whether the oil return hole at the casing installation is unobstructed), repair or replace defective parts, and check whether it has been severely impacted.