Air pump motor operation, but not how to do the air pump?
See if there is a problem with the sealing element. If the seal fails, the intake and exhaust can not be reached.
It is estimated that the valve plate of the air pump is broken.
What is your type of pump, oil free piston pump if that happens, it is the main source of air leakage, there are several aspects, one is the piston ring, a valve plate, there is a sealing ring, these words, it needs to put the top cover open the three places each check again, which is bad for which OK, I said that this figure, if this is just to do as I say Ok, if what do not understand, I can call on the name.
