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gummy valves

Postby bloke » Fri Mar 09, 2018 9:50 pm

I did a little experiment today, and "greased" my slides with rotor bearing oil (i.e. "something THICKER than valve oil").

My slides are extremely well-aligned, and I always use (nothing but) valve oil on them.

After a few hours, the thicker oil ("grease", if you will) migrated to my pistons, and (sure) they gummed up.

This is the first time that has ever happened to me.

Try doing what I do: (again) Use the same viscosity oil on your slides that you use on your valves.
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Re: gummy valves

Postby toobagrowl » Fri Mar 09, 2018 11:56 pm

^Kinda weird that you use valve oil on your slides. I'd think the viscosity would be too thin and dry out too often on slides. For me, I use grease or thick oil like 3-in-1. Depends on the tuba and which slides I need 'moving' or 'stationary'.
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Re: gummy valves

Postby oedipoes » Sat Mar 10, 2018 2:46 am

I sometimes have the opposite problem:
After generously oiling pistons, slides fall out...
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Re: gummy valves

Postby bloke » Sat Mar 10, 2018 9:28 am

"weird" = unusual, but not "wrong".

With perfect slides, valve oil works just fine.

Slides are really close (by design, obviously) to valves. It's really easy for two viscosities to mix into one...or almost one.
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Re: gummy valves

Postby windshieldbug » Sat Mar 10, 2018 12:52 pm

Image
Knowledge is knowing a tomato is a fruit. Wisdom is not putting it in a fruit salad.
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