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Author Topic: New Bach 42 problem  (Read 1391 times)
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RMVerdi
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« on: Mar 01, 2017, 06:29PM »

Hello,

I have a new 42b with which I am having a problem.  Namely, the two haves of the instrument tend to get stuck together and resist disassembly.  Anyone else have this problem?  I've owned many horns, many 42s and this a new one to me. Can I expect this issue to abate with use?  Or is this a manufacturer's defect?

I welcome all ideas and advice!

Thanks,

Roger Verdi
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Lawrie

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« Reply #1 on: Mar 01, 2017, 08:03PM »

Hi Roger,
<snip>  Or is this a manufacturer's defect?
I'd be thinking the opposite actually - to me it suggests that the mating tapers on the slide and receiver are actually an excellent match.

Perhaps be a little less, umm, energetic when assembling?  The nut is more for security than actually holding things together, at least until the taper starts to wear.
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daveyboy37

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« Reply #2 on: Mar 02, 2017, 08:37AM »

Yeah, sounds like you should put it together less energetically. It just needs to not move when you hold it. I'd be worried that you may torque other parts of the instrument getting it that tight, and then getting it apart.
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David Sullivan
Bass Trombone - Livingston Symphony Orchestra
Horns: Bach 39, King 3B, Yamaha YSL-640, Bach 42T, Kanstul 1570CR, Kanstul 1588CR, Yamaha YBL-612RII
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BillO
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« Reply #3 on: Mar 02, 2017, 10:47AM »

I have a Shires that is the same way.  Just get used to tightening it up enough to keep it from moving.
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elmsandr

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« Reply #4 on: Mar 02, 2017, 11:04AM »

The taper is 'self-locking' so this is prone to happening.

1. yeah, a little less torque on the nut sounds good.
2. Assemble and disassemble in opposite directions.  Just like preventing a stuck mpc.  Turn Clockwise when assembling the taper, and pull it apart counterclockwise.  Surprising how effective that can be.
...
978,623,486. You could rough up one side of the taper a little bit so that it isn't quite so smooth and round.  (I would probably just deal with it for a couple of years before doing this, but that's me)

Cheers,
Andy
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Andrew Elms
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« Reply #5 on: Mar 13, 2017, 11:25PM »

DONT  PUT ANY TEFLON GREASE ON IT  Amazed Amazed
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« Reply #6 on: Mar 14, 2017, 04:37AM »

The taper is 'self-locking' so this is prone to happening.

1. yeah, a little less torque on the nut sounds good.
2. Assemble and disassemble in opposite directions.  Just like preventing a stuck mpc.  Turn Clockwise when assembling the taper, and pull it apart counterclockwise.  Surprising how effective that can be.
...
978,623,486. You could rough up one side of the taper a little bit so that it isn't quite so smooth and round.  (I would probably just deal with it for a couple of years before doing this, but that's me)

Cheers,
Andy

Yes, this is good info. 
I have Edwards that do this too.
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RMVerdi
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« Reply #7 on: Mar 22, 2017, 01:48PM »

Thanks for all the input and suggestions.

Now that I've been playing the horn for a spell, the problem has disappeared.

Overall, it's finely built and playing instrument.

Thanks again!
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Keith Hilson
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« Reply #8 on: Mar 23, 2017, 04:51AM »

I have similarly seen this issue on a few new Bachs.  Our repair shop has been able to correct the problem by cleaning and polishing the tenon and receiver.
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Keith Hilson
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« Reply #9 on: Apr 06, 2017, 05:37PM »

This^
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wgwbassbone
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« Reply #10 on: Apr 07, 2017, 06:53AM »

The two haves? I don't understand.
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