79VetteMike

My Sears air compressor needed some new parts. I replaced the piston, piston sleeve and a few other things. It is a 3.5 hp with about a 20 gallon tank. It's an electric motor that moves the piston that requires no lubrication. Anyway, air blows in and out of the muffler(which was replaced also). I've opened everything, and cleaned it all. It was running crappy before, so it's hard to say if there is any difference. I bought it used from a friend, so I don't know how it acted when new. I removed the check valve and it seemed to be working, but I'm wondering if it's getting caught up. When I first put it back together, it seemed to be working, but I'm thinking the check valve is intermittent. Now it isn't even pumping up passed 40 psi-the max rated is 125psi. Is it normal for air compressors to get really really hot?


[Modified by 79VetteMike, 8:45 PM 5/23/2004]

Sharky Guam

Easy fix....replace the check valve.......

TLChydraulics

I agree, most likey the check valve assembly... I have repaired numerous compressors, but mostly big industrials in my line of work, and 90% of them wether they needed other parts too or not needed a new check valve assy or reeds depending on the make. Shouldn't cost you much.

Take care and good luck,

Loren :cheers:

79VetteMike

Ordered a new check valve last night. Thanks for the help guys. :thumbs:

Dalannex

Sounds like a check valve to me as well. Oilless compressors do run hotter than conventional ones too. Glad to see somebody else out there fixing their compressor. I have fixed and sold 3 smaller garage style compressors that people threw out because something was wrong with them, all of them took just a few bucks in parts to repair. :D Let us know how it goes for you.


-Justin