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RonRobbins
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Joined: January.13.05
Location: USA
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Posts: 5
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| Posted: January.19.05 at 5:46pm | IP Logged
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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
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| Posted: January.19.05 at 8:16pm | IP Logged
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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
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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
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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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Posts: 7
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| Posted: January.23.05 at 7:52am | IP Logged
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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
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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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Topic: Rental trumpet valves
