Yes I found out about Duniway kits for repairing vacuum pumps from the Sam's FAQ link after I had already fabricated my gaskets and used them on my pump. I haven't had a chance to check them out for future projects.
I am curious about their vacuum pump oil. I spent a fortune ( in beer budge terms) on? flushing my 1402 with oil then testing and retesting with more oil. The oil is expensive too!! The Duniway catalog price appears to be good but haven't investigated it yet. Recently to keep within my
beer budget I have purchased diffusion and mechanical pump oil from: http://www.vacuumoil.com/vacuumpumpfluid.htm? and mechanical oil from http://www.ebay.com/itm/4-LITERS-MORE-THAN-1-GALLON-INLAND-19-TOP-QUALITY-HIGH-VACUUM-PUMP-OIL-/370757280683?pt=LH_DefaultDomain_0&hash=item5652db23ab
I don't know enough about the Duniway oil; which one is best for my 1402 and price comparison. I have purchased a few Welch pumps form Ebay on the cheap ( except for freight of course) that require flushing or cleaning. It seem that every time I go through the exercise of refurbishing them I have to spend $$ flushing etc.
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.
