my 91916522-1 compressor doesn't build any pressure

my air compressor model #91916522-1 doesn't build any pressure.

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There are a number of reasons why this happens.

Rather than re-type them all here, let me direct you to the sitemap page. Look under troubleshooting.

Follow the link to the page about why air compressor run but don't build pressure.

When you have applied that info to your air compressor, if you have further questions or are still stuck, please add a comment here.

Cheers,

Bill

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Dec 29, 2013
Simple fix
by: Anonymous

I've had this same problem and have the same compressor.I bought mine back around 1999 and this has happened twice.The problem is simple.Go to Sears or order online,a compressor ring kit.I think they run around $20.They are very easy to replace and takes about 10-15 minutes.The rubber ring gasket around the piston wears down after use.

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Model 919.167311 problems with my pressure

by Pedro Diaz
(Modesto Ca)

My air compressor model 919167311 , I turn on the compressor but it only builts up 50 psi and never stops , what could be the problem
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Could be a bunch of things causing the compressor to run and not build power. Most are covered on the page about this issue, linked from troubleshooting section on the sitemap page.

Have a look, see what you find, and add a comment here with details.

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Craftsman 921.153101 1.5hp 3 gallon compressor won't build pressure past 20lbs

by Randy
(North LIberty, Iowa)

Compressor won't build past 20-25lbs. When shut off, does not leak.

Air (while running) comes out of oil fill hole. (I can feel it come out of the 2 small holes on the plastic oil fill tube. If I remove the plastic piece, enough air is coming out that I can't keep the hole plugged with my thumb)

I'm assuming that is where all the air is going out?

Thanks,
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That's a pretty safe assumption, Randy.

And, it's mostly likely caused by very badly worn piston seals, or perhaps even a scored piston, given the amount of air that is escaping the vent on your oil fill tube.

A tear down and a piston seal kit are in your future. Tear it down before ordering a kit to be sure that's all you need. It were me, I'd be replacing the gaskets along with the seals too.

Good luck.

Bill


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Aug 26, 2013
update
by: Anonymous

Thought I would pass along what I found. I tore it down, piston and rings looked good. I end up finding one of the gaskets blew out internally (The gasket that has the thin strip in the center that seperates the intake and output ports. Replaced the gasket and works great!
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Excellent. Glad you found that. Gaskets and valves are the typical reason why an air compressor runs but doesn't build pressure.

B.

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Two Stage Craftsman increase in the time it takes the compressor to pump up

by Greg
(Troy MO)

Below the air compressor pressure switch

Below the air compressor pressure switch

I have a Two Stage compressor fairly new just around a year old. I've ran into a couple questions one being the first Cylinder Head the larger one runs allot cooler than the smaller one. I've also notice a increase in the time it takes the compressor to pump up to 175psi. Also more recent the regulator??? Below the power supply has begun to bleed of all the air if I shut it off automatic mode. Just turn it off manual, this it bleeds all the pressure off. I attached a picture. The air comes out of the black tube with the hole at the top of it. (I drew a red circle around it)
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Thanks for the photo, Greg. I can see the hole. I just can't see exactly where this device fits into the scheme of things on the whole compressor, though you did say that it is below the pressure switch.

So, I'm going to guess that what I'm seeing is part of the unloader circuit.

If it is, the fix should be fairly easy. Empty the tank of air with the compressor off, find where the air enters the tank. There should be a check valve there. Remove, clean / or replace this check valve as I suspect that it is not seating properly, and allowing air out of the tank and out the unloader when the compressor is stopped.

Bill

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Oct 25, 2013
Cleaned
by: Greg

Hi, thanks for the fast response. I cleaned it and no luck. It looks like the check valve is seating at an angle. So I'm going to order one. Thank you

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