Problem filling air compressor tank on first use

by Tom
(Tinley Park, IL)

How long does it take to fill a 3 gallon air compressor tank? My new compressor has Ben running for over an hour and still has not been filled and shut down automatically.

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Tom... it takes a few minutes... certainly not an hour, to fill a 3 gallon air compressor tank.

Something is not right. Look on the sitemap page under troubleshooting and read the page that applies to your air compressor problem.

After that, if you have further questions, add a comment here.

Cheers,

Bill

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Craftsman gas compressor ... won't throttle down

when the pop off valve goes then it shuts off the engine. It won't go to idle.

Then there is no way on earth I can start again unless I take all the lines off from the pop off.

I've rebuilt the engine and it statrs on the first pull.

But after it gets it's air it will not start, even with ether.

Is it fixable or do I need new parts? I'm new at this, the engine was easy but the pop off systems seems to be whipping me...HELP!

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Bill says...

The unloader is supposed to allow the engine to throttle down to idle until there is greater demand for air.

It sounds like you either have an unloader that isn't working properly, or the throttle linkage/valve isn't doing it's job.

Cheers,

Bill

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921.153101 Craftsman 3-gallon, no air to air hose

by Kevin

Craftsman 3-gallon 1hp model 921.153101

The tank builds up pressure and the pressure gauge shows a normal readings.

However the regulator gauge shows zero pressure with the air hose connected but shows normal pressure if the hose is disconnected. Do I need a new regulator or is there something I can repair myself?

PS: bought this air compressor new but not from a Sears or Craftsman dealer. Looked like these units were sold to the aftermarket, may have been units with known problems.
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Kevin, when you plug an air line into the discharge connector on an air compressor, you are, essentially, opening the air from the compressor tank to the air tool. It takes a certain volume of air to fill an empty air line, more if the air line is 1" versus a 1/4" or 200' versus 50', for example.

That your air regulator gauge drops to zero when you plug a connector into the coupler tells me that your air regulator is not letter air flow through to the air line, and since the bit of air that was registering on the gauge from inside the regulator is now gone down the line, and it would appear that no new air is coming into the regulator from the tank, then yes, I would surmise that your regulator has failed.

If you know the make of regulator and want to source parts they can be fixed... however, by the time you find the parts and take the time to figure out how the compressed air regulator comes apart to fix it, spending the $30 - $40 or so for a new one might be your better option. Your call.

By the way, much of this is already covered on the page linked from the troubleshooting section on the sitemap page... the page that says... no air to hose!

Cheers,

Bill

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