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Originally Posted by mike ansberry The evidence of this is brown places on the valves. If this is the case, you can take a rag and some lava soap an polish the brown spots off the valve. |
I had this same problem with a) Kanstul (Besson International), b) Yamaha (YCR 2330), c) Bach 180-ML 37, d) Schilke (B1), and e) Jupiter 846L. Brown spots that looked like "varnish" showing up on the valves and that required the use of a cleaner to get it off. I used a stainless steel pot cleaner developed for highly polished stainless (Lagostina).
The final solution to the problem was to change valve oils. Have never had a recurrence since then.
FWIWCFM