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Tool Talk Discussion Forum

kellogg air compressor

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larry ennis

10-16-2003 03:09:37




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I have a kellogg #k321 two stage compressor.
What is the best grade/weight oil for this old dog?
It has a sight glass for the oil level but no mark as to where the proper oil level should be???
It set unused for a long time so I had to finess it to the point where I felt it was safe to power up the motor. It seems to work OK. Pumps up to my preset(145lbs)and holds pressure at that point.
Seems like it could use more motor. It has an Ajax 1hp on it. Man I got it from bought it new and said the motor is original?? It's big for a 1 horse so I guess it's OK. The motor appears to have bushing bearings. There are small plugs at each end of the shaft which I think are oil ports??
Where can I get an intake filter? This unit has a 3/4" pipe thread inlet on top of the large cylinder head. I can't find a factory filter so I wonder if a home made filter would work just as well?
Any advice would be helpful.
Larry

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Roger

10-16-2003 19:50:21




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 Re: kellogg air compressor in reply to larry ennis, 10-16-2003 03:09:37  
Hard to believe, but the 321 is indeed a 1 1/2 hp compressor. These days, it would probably be running at 1500 RPM and be sold as a 5hp. Any good, non detergent oil will work fine in this compressor. 20-30 weight is good. You should be able to buy an aftermarket filter assembly from any local compressor supply shop. You can get them with 3/4" NPT fittings, so they will screw right into the head with no modifications. The oil level should be up to the bottom of the threads in the oil filler hole. If you can unscrew the sight glass, remove it and clean it. Enjoy your "new" compressor. It is of a far, FAR higher quality than anything you will buy new. Parts may still be available from CompAir.

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Larry E

10-20-2003 04:20:33




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 Re: Re: kellogg air compressor in reply to Roger, 10-16-2003 19:50:21  
Thanks for the feedback on my compressor. I was able to make a pretty decent intake filter using what I could scounge up. Total cost was $10.00
One question about the oil level in the crankcase. The filler port is at the level where the cylinder joins the crankcase. I have about 1 inch of threads in filler hole. It will take about 2qts to reach that level. Does that seem about right??? Takes about a qt to fill sight glass.
Is there such a thing as a group devoted to old compressor's? I started out just wanting a small unit for use on small job's. Got one of the little buzz and shake piston types but saw rightaway that it was not much use for anything but bike tires and air mattresses? I have now collected three more including the Kellogg.
Next project is an old "no name" unit that has an old Westinghouse wound rotor type motor. Tag on motor claims it is a one horse but it's as big as a 10 horse. This may well be a homemade unit. The pump itself is a two cylinder unit although to look at it, it appears to be a single. Both piston's run in a single casting that has been bored for two cylinders. Whole mess is mounted on a horizontal 40gal tank that looks tiny under all the iron mounted on top of it.
Larry

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R. Marg

10-16-2003 08:24:32




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 Re: kellogg air compressor in reply to larry ennis, 10-16-2003 03:09:37  
I use valaline raceing old in my compressor its the the same brand as yours but it work well in it and as far as the filter you should be able to get hold of the company that made the compressor and get a filter or make some thing to hold a lawn mower filter as it would be just about the same as the one it had



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