Subject: Teflon O-rings
From: ACRE NL
Date: 5/14/2001, 10:28 PM


Hi Ken,
I did manage to get the outer oil control O-ring installed with great
difficulty.  I was concerned that all the pushing and prying had damaged it
so I took it out to inspect the 0-ring.  The outer Teflon sheath was nicked
in several places and crimped around most of the diameter.  I purchased the
inner Teflon encapsulated O-ring that was recommended on the Internet several
months ago.   Anyway, it wouldn't work at all and it was destroyed
completely.  I think I may have even damaged an oil control ring while trying
to force things too much.

Don

Measure your O-ring section sizes Don. The ones I had were .105
for the outer and .128 for the inner. I tried installing the outer
and I had similar problems to those that you had. I think the section
sizes are too large by about .010. If you measure the stock rings
with a vernier caliber I think you will get .090 for the outer 
and .118 for the inner.

I chucked my junk rotor in the lathe and used a file to chamfer the dividing
wall. I then polished the chamfer with emory cloth. Worked great. Did not help.
You will need a 10 power  jewelers loupe to inspect the chamfer. 
I also used vaseline. Did not help.

I think our TES rings section sizes  are too large by about .010. Don't 
know how that happened. In any event Creavey has the right size so I will 
try to buy some tomorrow and try again. Hang in there awhile. I am working
on it. I will also order some Kalres and try those. They look almost
as good as TES.

Paul Lamar
 
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