3Z180 Speedaire builds pressure very slowly then starts smoking after 2 or 3 minutes

by Tom
(Endicott NY USA)

At work we have a Speedair 3Z180 2 stage on a 60 gallon tank that has been working fine then started leaking air thru the intake air filter.


I was told thru a Grainger contact at Champion that I need to replace the valves. They sent me the valves and after changing them, now it builds air very slowly and the compressor starts smoking after a few minutes.

I did notice some oil on the top of the piston in the exhaust port when I had the manifold off.

Could I have replaced the valves incorrectly? I was sure to have the nut/screw head "UP" on each one so as not to interfere with the piston and they were sized to fit each port. Could the presence of oil atop the piston indicate bad rings? Tom
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Tom, my thoughts are thus. All reciprocating compressors that are oil lubed wick some oil past the piston seals. If the intake valve is faulty, then it allows some of the oil that has bypassed the piston seals to blow out the intake.

However, the oil that wicks past the piston seals should be in very small quantities. You don't say so, but I surmise from your comment, that you've got quite a bit of oil, yes?

So, yes, you may have pooched the valve repair. Don't know, but you still have, in my humble opinion, as significant seal issue on the piston, and that's what I would tackle next if it were my compressor. Assuming that there is a lot of oil???

If you ponder how the compressor works, you will see that if the piston seals are gone, you cannot build air properly into the air tank, as some of that air is blowing back into the oil sump and out the oil fill vent too.

Just my .02 cents worth. Good luck.

Cheers,

Bill


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making noise when running

by brian
(jasper indiana usa)

after tear down pistons, rods,crank all look good. was wondering about governor spring could be faulty or sticking?

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Lots of noise under pressure

by Joe Matousek
(Pismo Beach Ca)

Speedaire 3Z180 compressor pump (Photo:www.grainger.com)

Speedaire 3Z180 compressor pump (Photo:www.grainger.com)

I have a Speedaire compressor that is making a lot of rattling noises The pressure is real slow to build up and there is a lot of air coming out of the oil fill hole. The pressure eventually builds up to 125 but the noise just keeps getting loud and louder.

Should I replace the compressor head?
Thanks
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Well Joe, I cannot hear the sound your air compressor is making.

Based on what you say about a lot of air blowing out of the oil fill tube, I would guess that your piston seals are going, and you are getting a lot of blowby of air. Rather than the air going down into the tank, it's escaping by the piston seals.

Certainly, if this were my Speedaire air compressor, I would want to tear down the pump to have a look at the piston, cylinder walls, and while it was apart, I would replace the valves and gaskets.

If that isn't something you are into, then yes, maybe a pump replacement is in order.

Cheers,

Bill

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3z180 - what kind of motor

by alex
(fresno ca)

i have this compressor but no motor. what kind of motor do i need what size. and it compressor hasnt been used for years. but it works what can i do do tune it up?

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Hi Alex:

In theory, you can use any electric motor that has the same HP, same voltage, same mounting configuration, same shaft size, and if the old motor was a TEFC (totally enclosed fan cooled motor), that style too.

The reality is that identifying a compatible motor might be beyond the ability of folks that only do this sort of thing once or twice a lifetime.

So, may I suggest you visit the Speedaire page on this site, and follow the guidelines to contacting your local branch. They will be able to help you. Just go back to the home page and follow the link to the Speedaire page from the nav bar.

Regarding the 'tune up', if it hasn't a motor, how do you know it works?

In any case, if it is a lubricated model, I would change the oil. Other than that, you need to get a motor on it and get it to run up to cut-out pressure so you can see if any other issues surface.

Cheers,

Bill

Comments for 3z180 - what kind of motor

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Mar 16, 2009
Mod #
by: Barry

You may want to recheck that Mod# I think it may be 3Z180 as Bill said the folfs at Grainger will be of Great help

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