If you keep the instrument clean, you almost never have to remove the rotors. Just squirt oil down the leadpipe once in a while to keep them coated, and oil the bearings with light machine oil, which can be done without disassembly.Jonathantuba wrote:Having recently got my rotary valve PT-6, I am interested in how often existing rotor users dismantle and clean out the valves to keep them in good working order.
I just did it to the valves on my Miraphone, after at least ten years of sometimes-heavy use. I have flushed the instrument during that time on occasion, and have oiled the bearings frequently. Probably the only reason I needed to take them apart this time was that the oil I used on the rotors had thickened too much and I needed to clean it off with a solvent and start over.
I once owned a VMI stencil that needed disassembly more often. The new valves would attract deposits far more than my Miraphone ever has, but I think it was because I didn't dump oil down it like I should have. I had to take those valves apart four times in two years, but I told its new owner to dump oil in the leadpipe before every use and as far as I know it has not required disassembly since that time (about 8 years ago).
Rick "thinking rotary valves were not made to be disassembled too often" Denney