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Master Power MPAC521 manual and testing?

Published Categorized as Alltrade 8 Comments on Master Power MPAC521 manual and testing?

by william clough
(spray, oregon)

I’m looking for service manual and/or user manual for Master Power air compressor by cooper tools model #mpac521 twin stacked tanks w/150psi max.

Master Power air compressor MAC 521
Master Power air compressor MAC 521

Trouble shooting and testing of condenser and check valve.


Is this it?
by: Doug in s.d.ca.

Please copy and past the URL in to your browser to see if it still works, and, is this close to yours?



by: Anonymous

I’m looking for the parts listing/manual for mpac521 t00.


mpac 521 compressor
by: Bill

There is a URL to a compressor by Alltrade Tools in this thread.

If that URL isn’t the manual you want, the only other Alltrade compressor I can find is here:


Maybe visit this page, get the contact info for Alltrade and give them a shout?

By Bill Wade

About Air Compressors has been helping folks with their Air Compressor Problems since 2002 online. We're a community of DIY and Compressed Air professionals who are keen to support everyone across the globe with their air compressor issues and troubleshooting. Whether you're trying to identify an old air compressor, or troubleshoot an error code on a sophisticated new industrial air compressor - the community at About-Air-Compressors.com is here to help you

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