Insufficient output air pressure 90234 compressor?

by Greg
(San Antonio)

compressor with regulator removed and pressure switch cover off

compressor with regulator removed and pressure switch cover off

Hi Bill,


Re: insufficient output air pressure from Central Pneumatic 90234 compressor

I have a Central Pneumatic 90234 air compressor I got a couple of years ago from Harbor Freight. It has had light, occasional use, just a few hours total.

Lately I'm having a problem with what seems to be insufficient air output -- not enough to add air to a tire that has 26 PSI and not enough to run a long reach air scraper, also from Harbor Freight.

The compressor seems to run fine and both the main and regulator gauges show 100 PSI plus before the pressure switch shuts off the motor.

The ball valve shut off where you connect the hose is visually clear when open. I removed the regulator assembly to bypass it and still have no usable air output when the hose is connected directly to where the regulator normally screws in.

The hose is not obstructed and air output when sent thru a hand operated blower knozzle seems fairly strong, but obviously not enough to do most work needed. It looks like the problem may be somewhere in the main output/switch assembly.

Any troubleshooting ideas are appreciated.

Greg
_________________
Greg, thanks for the photo.

I don't think your compressed air flow has anything to do with the pressure switch. Though it looks like the discharge line is coming off the switch, from my perspective it's actually coming off the switch manifold. Whether the pressure switch works or not (and based on what you wrote yours is) it should have not effect on the air flow from the compressor tank.

If that is the tank gauge I'm seeing in the photo, where is the regulator gauge? And for that matter, where is your regulator? I see the line coming off the switch manifold, but don't see the regulator at all.

Typically, the only thing between your air tool and the air in the compressor tank is the regulator and the discharge coupler.

From the photo it looks like you have the hose hard plumbed into the manifold, and there is no coupler, just the ball valve.

So, my guess that it is your regulator that is your compressed air flow problem, though I could be more sure if I could actually see the darn thing in your photo.

How about starting a new thread, include this photo, but also 2 or 3 more of the pressure switch area from all sides?

Cheers,

Bill

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Need parts for model 90234 compressor?

by Tim
(Sparta, Tn)

Central Pneumatic compressor model 90234 (photo: hfreviews.com)

Central Pneumatic compressor model 90234 (photo: hfreviews.com)

I need a fan blade and housing cover for model 90234 ten gallon air compresser where can i find the parts that I need. Tim
_____________________
Ask your local Harbor Freight store where they send their air compressors for warranty repair. If the Harbor Freight store doesn't have the parts, perhaps their repair depot will.

Of course, you can call them directly for help, since your 90234 compressor does not seem to be current:

For technical product questions, please call 1-888-866-5797, Monday thru Friday, 6:00 am to 6:00 pm PST.

Cheers,

Bill



Bill

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