Craftsman 1/2" Impact Wrench - Page 5 - Answered Questions & Fixed issues

In 80% of the cases this is the problem. I sulose that you use a lot this compressor so the one way valve gets worn out. The first stel is to pull out the smal hose when the unit stops and see if air escapes. If so then change the black piece in the photo. It will last for a small period of time. I recomend to change the piece in the photo.
This is a way to solve the problem if air escapes trough the small hose.7

Sounds like a leaking valve to me thats why no shut off.

if you go to you tube Craftsman 3 gallon air pump oil change ,it tells you the brand of oil and shows the amount needed . hope this helps .

15 amps at 12 volts = 180 watts.

Broken hose or pressure line ? membrane plates broken cilinder gasket blown out or check valve is dirty

Your old valve plate can be repaired. Usually only one or two reeds break. Carefully trim off broken reed exposing port hole. Tap hole with fine thread and make plug with proper matching bolt. plug should be same thickness as plate. Thread in plug using thread locker then ping in several spots. Works without loss of volume. You could also replace the reeds. Good luck..

if shuts down at 20 psi regulator is set wrong it runs but only builds 20 psi, compressor is probably worn out

The motor should have that information on the nameplate

I've been working on air compressors for a while now and so far haven't found any that give a specific amount of oil to put in the air pump crank case. They all have one of two methods to get the oil to the proper level. First, and my favorite, is a sight glass at the bottom of the crank case. About the size of a quarter, it lets you see how much oil is in the pump as you add it. Usually they have a red center dot which is where you want the oil level. A little over or under is OK but the sight glass should not be completely full or completely empty, both are hard on the pump and drive motor. Another method is a dip stick usually on the end of the fill hole cap. Only bad thing about these is you have to put in some oil, check the oil level with the dip stick, then add more oil and check it with the dip stick until you get to the full mark. Again, not over and only a little under is where you want the oil level.

does it have oil? take it back for a replaement. pull the belt off and see if the motor is still good. turn the pump by hand to check for free turning.

If the blue arc is coming from the motor it might be an older motor that uses brushes. If the motor is serviceable you would need to take apart the motor and change the brushes. Blue arcs don't usually come from shorts

Could be a faulty compressor its self. Leaky hoses or lines. Mine had a tiny rust hole in the tank its self and had to get it welded. Is your pressure setting up where they should be. mine has settings where you turn a knob to set pressure up or down for different operations. These are just ideas to help Good luck.

w/o other details, one can only presume that the tank pressure switch has be adjusted to high or it has failed/broke. Adjust pressure downward (if not already). Replace tank switch.

You either didn't get it back together correctly or you will need a new pressure regulator.

Loosing line a little bit going into tank and see it the pressure continues to come out if so, you might want to consider replacing the check valve. It is designed to keep the pressures in the tank and when they leak off it causes back pressure on the motor making it hard to restart...hope that helps.

For the money and reliability campbell hausfeld makes good all around air compressors, God bless

on amazon you can find replacement parts to fix it. Amazon com Jobsmart Hope this was helpful. cheers

you may be using to small a hose, I use a 3/8" on mine if you are using the same your pressure regular is bad or out of adjustment I bought a new one at home depot i think it was about $20

you can get quick connect adapters at home depot, lowes or most auto parts houses

My compressor runs for about 5 min and shuts off.....does any one knows what could be the problem? thanks