Question about Air Tools & Compressors
The air sompressor worked perfect for a couple jobs, then when I pulled it outfor work another day, I turned it on and let it build air. The tank filled up with air then it kicked on and off. I shot a few nails with it to see if it would happen again and sure enough, it did. I changed the oil and tried again, same thing. A friend of mine told me that it was something to do with 3 cross threaded rings at the "nipple". But I'm not too sure which direcion to turn the rings to tighten/loosen or whatever the case might be, Or even if this is the problem. He sounded kinda vague. Anyways, thanks for the consideration.
The pressure switch needs adjustment. If there is a cross thread on the regulator then by all means fix that too. It's dangerous. The threads can let go at any time and cause injury to any one near by.
Posted on Jan 29, 2014
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Posted on Jan 02, 2017
SOURCE: air compressor not filling tank
Most compressors with the problem that you are having suffer from leaking valves. As in a gasoline engine, leaking valves will lower efficiency. Valves in a compressor are in the form of reeds that seal against valve plate. Leaking reed valves or gaskets will increase the discharge air temperture. Inspect these parts with a magnifying lense. Look for evidense of wear or leaks. Also look for signs of air leaking from one cylinder to the other thru gaskets. Replace valve plate as necessary. Simple test, as your compressor is filling, check the intake for strong suction; as it neers the 92 psi mark suction will probably deminish if you have leaking valves. If suction remains strong at 92psi then you have a leak at the discharge side. Check with soapy water on all parts. Good luck
Posted on Jan 19, 2009
sounds like you need a new check valve which should be somewhere between the compressor outlet piping,tubing,etc and the tank which prevents the air in tank to back feed to the compressor which would cause hard starting and could damage the motor easy way to check is when you shut off the compressor with some air in the tank if the check valve is bad it would continue to bleed air out out the unloader valve .the unloader valve on your unit is most likely part of the pressure switch when the unit shuts of it should only bleed down the pressure in the pump so it would make it easy to start when needed hope i didn't confuse you
Posted on Mar 23, 2009
It sounds like you may have a broken reed on the diaphragm plate. This is located at the block. Remove the cover, and look for a cast metal assembly with fins. It will be attached to the side.
Posted on Apr 23, 2009
Sounds like the compressor has failed -- probably the valve -- tear down and rebuild is probably the solution, or replace compressor, or just buy another unit. My nature would be to tear it down and see what's going on.
Posted on Mar 23, 2010
SOURCE: porter cable 3hp air compressor
Check to see if the switch will kick in if the pressure is released from the hose going to activate it...if so then the problem is the air being trapped between a check valve and the switch in the hose...
I think that is your problem...
There should be a way for the air pressure to change and represent the tank air pressure accurately....
The different compressors all have different ways of checking the air and then allowing it to release as the the tank pressure decreases..
There is a small hole there somewhere that is clogged with dirt and or oil...find that and clean it and you are in business again...
Posted on Jul 27, 2011
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