On 2009-09-18, Joe wrote:

I might as well. Ran it for 10 seconds and it started rattling and smoking.
first and last tool I ever buy from HF.

That's what rotary vane pumps do when they've pulled a vacuum. The
smoking is oil vapor backstreaming. You should have said what you were
going to use it for in the first place. I thought you were going to
use it for pumping down refrigeration lines, its intended purpose.
Maybe HF will take it back. Tell 'em you didn't know about
backstreaming and can't tolerate any oil on the work.

nb