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Noisy rods on rotary valve linkage
Posted: Sat Jan 14, 2017 9:19 pm
by Tuba5547
I have a Cerveny CBB 686-4 Series 4-Valve 4/4 BBb Tuba . The linkage rod on the first valve is real noisy. I can quiet it somewhat by putting a little slide grease on the ball; but it doesn't last too long. There is a little screw on each end, but it looks like it is tight already. I don't want to force it. Any suggestions?
Thanks!
Tom
Re: Noisy rods on rotary valve linkage
Posted: Sat Jan 14, 2017 9:54 pm
by scottw
58mark wrote:post a pic. Never heard of that brand
Maybe he is going for "Cerveny"?
Re: Noisy rods on rotary valve linkage
Posted: Wed Feb 19, 2025 8:41 pm
by circusboy
Does anyone have an answer to the OP’s question?
Re: Noisy rods on rotary valve linkage
Posted: Thu Feb 20, 2025 12:00 am
by Older Pro
yeah, Cerveny linkage with the screw in the end SUCKS. Replace the full linkage will some kind of ball and socket system, even if it's dubro hobby parts
Re: Noisy rods on rotary valve linkage
Posted: Thu Feb 20, 2025 1:04 pm
by circusboy
Suggestions on how to source just what would be needed from Dubro or any other company, including instrument makers?
Asking for a friend. Thanks.
Re: Noisy rods on rotary valve linkage
Posted: Thu Feb 20, 2025 7:40 pm
by Older Pro
sure it's easy. go to a hobby shop. you'll want some ball ends that screw into you existing hardware (stop arms and spatula levers) and then some connecting rods. If the ball ends are 3M, get 3m connecting threaded rods, and maybe some brass sleeves to put over there. If the ball ends are 4-40, use 4-40 rods.
PM me if you need more help