View Full Version : need parts for an old sears compressor
11-25-2003, 06:52 PM
I have a 20 year old Sears Air Compressor which I think needs new piston rings and sears no longer stocks that part. Anybody got any suggestions as a source for odd sized piston rings. The compressor is a 3 hp 2 stage unit with two side-by-side cylinders.
11-25-2003, 08:52 PM
Lawn mower rings,look for Briggs&stratton and etc,also motorcycle so long as they are cast.
I ended up replacing the compressor...and the motor...and the pressure switch, on my old Sears compressor. After I was all done, it was clear it would have been cheaper to just buy a new one.
Before you get in too deep....
11-26-2003, 08:28 PM
Are the rings completely shot?If not I did reuse a set on an old Kellogg I had by splipping them down onto the skirt and baking them in the oven on 550* for an hour,they worked good for about six months after that new compressor time.
11-27-2003, 01:00 AM
I took an old fire sprinkler type compressor adapted it to a 80 gallon Sears tank. The compressor is loosing its compression, I checked on price and all of that to rebuild it. So next month I drop a couple of hundred dollars on a new compressor and hook it in to my big air tank. More compression and more volume.
I like the new HF 4.5 HP compressor with the 21 gallon tank, I have one in my basement shop and it handles a lot there. I use my brad gun, nailer, air nibbler and air grinder from that one in the basement. Plus can run three air brushes at the same time.
11-27-2003, 02:14 AM
Lets see, 4.5 HF hp... is about 1.75hp in real life. You won't be running any sanders with that!
By the way, how do you hold that third air brush? http://bbs.homeshopmachinist.net//biggrin.gif
Pasofino - Check the valve plates (flaps). They usually wear (from dirt) before the rings go. Make sure they seat and seal.
[This message has been edited by CCWKen (edited 11-27-2003).]
11-27-2003, 03:39 AM
I agree with Ken. CHeck reed valves first. If it ain't using oil, the rings are most likely good (in a good compressor).
Reed valves and clogged filter are more likely culprits.