Sanborn labors as it approaches 100Psi

by Peter Hellermann
(Huntington, NY)


I have a 10 yr old (or older?) Sanborn 84TE20-8 compressor that's never been used.

Now, when I turn it on and it approaches about 100PSI, it starts to labor, slows down and then blows a house circuit breaker (20amp).

If I release the pressure and just let it pump air out of the tank with no pressure buildup it runs fine.

Could this be an unloader valve problem? how do find the valve on this model, and how can I get OEM or other suitable replacement parts?

I hope I can salvage this, its a great compressor.

2 stage, 2hp motor, 2 4 gallon torpedo tanks, wheelbarrow configuration, wired for 120VAC.

I can send pics of you like.

Regards, Peter Hellermann

Comments for Sanborn labors as it approaches 100Psi

Click here to add your own comments

Jan 29, 2019
Sanborn trips breaker
by: Doug in

Peter, you're not running it on an extension cord, are you?

Please send pix - that model # doesn't click...

Are you sure it's two stage, or is it maybe a straight twin? Where does the red start on the tank gauge? Or, if no red, how high does it go?

Anyway, pix please, we can work it out.

(To add photos to this existing post, start a new thread in this same forum, use this same post title and write that the photos are for an existing post with the same title. You can then upload up to four more photos. They will be moved here. Photos can be up to 1.5 MB and a maximum of 800 x 600 px in size. Moderator)

Click here to add your own comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Has Unloader Valve Issues.