Air compressor not building pressure

Air Compressor Trouble-Shooting, Problems, The Causes ...

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Provided below is a general list of common air compressor problems, and a few quick ... Loose pulley, flywheel, belt, belt guard, cooler, clamps or accessories. ... Piston rings installed up-side down. ... Receiver does not hold pressure when compressor is unloaded. ... Turn on power, check fuse, breaker, or motor overload.

Reasons Why an Air Compressor Will Not Build Pressure

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An air compressor that will not build pressure runs on long past the point where it normally ... air compressor with at least one piston that moves up and down or side to side to pump air - cycles, .... I have an Ingersoll rand 7100 compressor 2stage 175 psi 120 gal tank ... The motor is a 2.5hp 3450 rpms with a 4 inch pulley.

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Mar 16, 2006 - 15 posts - ‎8 authors
I have a 27 gallon belt driven Sanborn (Coleman) compressor and I have been ... I'mnot suggesting they won't compress air or give good service. .... Most any small oil-less compressor will serve a nailor, pump up the snow tires ... A two stagecompressor pumps 20 to 30% more CFM per motor HP thanks to ...

The problem with compressors not building pressure is usually a bad pressure switch or bad regulator. Does the motor shut off at 20psi or does it continue running and not build pressure? If the motor continues to run with no increase in pressure, the you should go over the machine looking for air leaks from your regulator back all the way to the motor. Any air leak while the compressor is running can cause the pressure to "peak" way before the intended shutoff that it is regulated to.

Bad check valve. But I would check the regulator, by turning it down to about 10 PSI and running it and see if it builds again, if that works then it is the check valve. But from what you are saying I would replace the check valve anyways.

when i turn it on motor runs but it will not build up air pressure

sounds like valves in head have failed and need to be replaced, that is where I would start looking first.

look at he check valve

It looks like there might be a knob which sets the max air pressure coming from the compressor. If there is one, this may have been turned down.

There are usually 3 pressure settings on an electric compressor. Compressor max, pressure switch cut on, and pressure switch cut off.

Your problem falls into one of two categories the first is the tank is leaking the second is the compressor is leaking. Try this run the compressor for a minute or two and turn it off if to hear a hiss the tapers off slowly your tank is leaking some were check the drain on the bottom of the tank, the pressure relief valve on the top or side of the tank and all other connections between the compressor and tank.

In the event there is no hiss this means the problem is the compressor you may have a bad reed valve or a bad check valve depending on the type of compressor.

hope this helps

THE COPPER LINE IS SUPPOSED TO GET HOT, SCALDING HOT ACTUALLY. THE MOST COMMON REASON FOR COMPRESSORS NOT BUILDING PRESSURE IS CLOGGED AIR FILTER OR THE VALVES IN THE HEAD ARE BROKEN OR NOT OPENING AND CLOSING CORRECTLY. YOU MAY POSSIBLY HAVE A BAD AIR LEAK DOWNSTREAM BUT YOU CAN CLOSE THE DISCHARGE VALVE ON THE TANK TO ELIMINATE THAT PROBLEM. HOPE THIS HELPS OR GET YOU STARTED.

compressor will not build pressure