Sears 106.153782 twin cylinder trips breaker

by Avery
(Connecticut )

I got an air compressor given to me by a friend. His step dad has put a smaller motor on it.


The compressor is a Sears 150 psi twin cylinder utility paint sprayer 106.153782.

The compressor builds to about 80psi then trips the breaker.

Also it cannot be started when the tank has anything over about 8 psi.

In that case it tries to turn but just blows the breaker.

At first I thought it was the capacitor so we replaced that, still tripped.

Then I thought it was the check valve so I replaced that with a newer craftsman check valve and plugged the port for the bleeder.

Did the same thing.

So I’m wondering if this could be maybe a wiring problem with the motor when it was put in or could it just not be a big enough motor all together.

Or could there be some sort of valve or something in the pump that’s letting air back in.

I really am lost at this point but I want to fix it badly because these are really nice old compressors.

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Sep 16, 2018
Sears 106.153782 Try this
by: Doug in s.d.ca.

"Or could there be some sort of valve or something in the pump that’s letting air back in."

If the check valve is working, and you have the head with an unloader port, then probably the unloader in the pressure switch is inop.

You can test by putting a valve in the unloader port. Start the machine with the valve closed. Open it after pressure builds and it shuts off. You should get some air, and then nothing. Close your valve, let some air out, and see if it starts OK.

Alternately, you may be able to just loosen a fitting to make it leak, for the same effect, depending on if you need a temporary fix while waiting for a new switch.

Good luck. Let us know what happens, OK?

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