A _little_ red rust makes a fine lapping compound for close-fitting
metal parts... just sayin'. ;D
On Feb 12, 2013, at 3:03 PM, Vaughn Mcdowell wrote:
I got one frozen up too from Ebay which was supposed to have been refirbished; resisted taking it apart and realized that it was dry ( completely drained of oil and apparently sat on the shelf ). I put some oil in it and gently wiggled it ( hopping not to break the vain shaft) with some force; but with care. Believe it or not it finally gave way no longer frozen. When I flushed it I realized that the vanes were slightly rusted to the stator. Amazingly this initially frozen Welch 1400 turned out to be one of my best Ebay investments; at least if I believe my TC gauge ( less than 2 microns). Maybe you can get your frozen pump working.
I feel extraordinarily lucky to have had so few complaints with roughing pumps.
I lucked into my first one (a Cenco HyVac7) at an electronics surplus store who despaired
of ever being rid of it. It was _well_ used (ahem) with a leaking shaft seal, no motor, not even a mounting base, for $50.
It pumped okay, but the rebuild sounded like more than I wanted to take on, so I wound up giving it to another friend after someone gave me a Hyvac 14 in good working order. :)
- Bill "Gomez" Lemieux,
The Highland Tinker
