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Subject Topic: Rental trumpet valves Post ReplyPost New Topic
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RonRobbins
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Joined: January.13.05
Location: USA
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Posts: 5
Posted: January.19.05 at 5:46pm | IP Logged Quote RonRobbins

When preparing your rental return trumpets to be put back on the shelves after the chem clean do most of the shops oil the valves or leave them dry? If you use an oil what do you use?

Ron
Band Instrument Repair Shop
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stevemarti
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Joined: January.19.05
Location: USA
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Posts: 7
Posted: January.19.05 at 8:16pm | IP Logged Quote stevemarti

I've noticed that if I oiled them and then they sat around until sept. Sometime they would be sticky. I'm inclined to leave them dry if it's going to be stored for long periods. I might consider applying Feree's Z8 additive. My undestanding is the liquid part is just the carrier part that evaporates and leave a solid particle lubricant.  
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marksteenis
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Joined: January.13.05
Location: USA
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Posted: January.20.05 at 7:32am | IP Logged Quote marksteenis

we leve them dry. it seems like if we oil them, by the time they get played, the oil has dried out leaving mineral deposits.

mark
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davidlaws
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Joined: January.22.05
Location: USA
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Posted: January.22.05 at 8:31pm | IP Logged Quote davidlaws

I am retired now but always left them dry. This caused a big argument between me and my last boss. I told her at least fifty times that if the valves came out of the shop oiled they would be glued solid by September, and in September I didn't have time to deal with them. She finally gave up and secretly oiled them as they came out of the shop. And then, of course, expected you-know-who to deal with them. Needless to say, I was not pleased. She finally learned to have her staff oil them right before rental season.
Please be aware (and I say this knowing I will get a raft of refutation) that "oil" for valves has always been mostly kerosene. I can't speak for the new synthetics, but any old-fashioned oil is going to evaporate the parts of it which can, leaving only the parts that can't (a technical term for this substance is "glue"). And the controversial part of this post is that any oil, new or old, petro-based or "synthetic," is not to lubricate but to fill space. That's why the valve that has a minor problem will work fine dry but drag when oiled.
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stevemarti
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Joined: January.19.05
Location: USA
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Posted: January.23.05 at 7:52am | IP Logged Quote stevemarti

The gap filling/sealing aspect might be noticeable on a leakdown test with nice close fitting valves. I like to check action bone dry before I oil them.

I guess you can think of sticky oiled happening like two wet pieces of glass stuck together. If the film is too thin you get drag. Makes sense to me.  
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AllenLangdon
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Joined: March.17.05
Location: Canada
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Posted: April.01.05 at 6:48pm | IP Logged Quote AllenLangdon

As I was getting our trumpets ready to be rented I oiled the valves. Seen as all did not get rented and it has been nearly a year I will pull some off the shelf and see what the valves are like and post the results here.
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