Rotax Valve Maintenance

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harrisonreed
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Rotax Valve Maintenance

Post by harrisonreed » Sat Aug 18, 2018 9:00 am

I even asked the valve manufacturer, read my Edwards manual, and search on the YouTubes... but I can't find it.

I can disassemble and reassemble a conventional rotor. I can't figure out how to do the same on a Rotax valve. I also don't understand what the adjustable mechanism around the spindle does. The manual says: "adjustable with hex screw", but not what is adjustable about it.

Anyone know? Even better, anyone want to make a video of it?
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greenbean
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Re: Rotax Valve Maintenance

Post by greenbean » Sat Aug 18, 2018 9:38 am

You contacted Willson and they didn't help you? That would surprise me.
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Re: Rotax Valve Maintenance

Post by harrisonreed » Sat Aug 18, 2018 9:44 am

greenbean wrote:
Sat Aug 18, 2018 9:38 am
You contacted Willson and they didn't help you? That would surprise me.
Yeah, they had no manual to give me, and basically wondered why anyone would want to take tge valve apart....
:weep:
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BGuttman
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Re: Rotax Valve Maintenance

Post by BGuttman » Sat Aug 18, 2018 11:07 am

I wonder if it's like the old joke about boats: If you need to ask how much it costs you can't afford it.

In this case, "if you need to ask how to take the thing apart you aren't qualified."

I'm sorry it probably doesn't have pictures if it exists in our Archive, but I think Trav1s looked into putting one on a Conn 79H.
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Matt K
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Re: Rotax Valve Maintenance

Post by Matt K » Sat Aug 18, 2018 1:45 pm

Are the Rotaxes they put on the 396 (I assume that's the one you're talking about) different from the stock ones too? That might explain their recalcitrance as well.
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Trav1s
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Re: Rotax Valve Maintenance

Post by Trav1s » Sat Aug 18, 2018 1:58 pm

I had a Rotax installed on my 79H in 2011. Other than oil it with Hetmann oil I have not done anything to it. I don't play it as much as most people do but it was only sticky once because I had not oiled it in a LONG time. (shaking head in shame)
My install is also slightly different because I wanted to keep a string on the rotor because I like the quiet and quick response.

Now you have me curious...
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Trav1s
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Re: Rotax Valve Maintenance

Post by Trav1s » Sat Aug 18, 2018 1:59 pm

Here are pics of the install Benn H did the work.

https://www.facebook.com/media/set/?set ... d9b1e4ee92
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Re: Rotax Valve Maintenance

Post by harrisonreed » Sat Aug 18, 2018 2:14 pm

Matt K wrote:
Sat Aug 18, 2018 1:45 pm
Are the Rotaxes they put on the 396 (I assume that's the one you're talking about) different from the stock ones too? That might explain their recalcitrance as well.
No clue! I don't think so though.
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Re: Rotax Valve Maintenance

Post by harrisonreed » Sat Aug 18, 2018 2:17 pm

Trav1s wrote:
Sat Aug 18, 2018 1:59 pm
Here are pics of the install Benn H did the work.

https://www.facebook.com/media/set/?set ... d9b1e4ee92
That does look really cool, but I wish it showed more of the "front" of the valve (which is what trombonists think of as the back of the valve). That's usually where the work of popping the valve out is done.
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BGuttman
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Re: Rotax Valve Maintenance

Post by BGuttman » Sat Aug 18, 2018 2:20 pm

Thanks for posting that Trav1s. At least the history is not lost. And nice shots of the stripped down Rotax to boot.
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Re: Rotax Valve Maintenance

Post by Trav1s » Sat Aug 18, 2018 2:53 pm

I will see what I can do for some additional pics. Just picked up a 32H (dual bore .500/522) and want to play with the 32H slide and the 79H bell section. I hope I can get pics tomorrow and will add them to the album.
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Re: Rotax Valve Maintenance

Post by Trav1s » Sun Aug 19, 2018 6:44 am

You can see the valve alone in this album.

https://www.facebook.com/media/set/?set ... fd5ca92c4f
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Mikebmiller
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Re: Rotax Valve Maintenance

Post by Mikebmiller » Sun Aug 19, 2018 1:40 pm

FWIW, I have a Rotax valve on my Rath and the support guy at Rath told me they recommend using standard Dennis Wick valve oil on it.
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Re: Rotax Valve Maintenance

Post by Bonearzt » Sun Aug 19, 2018 5:49 pm

Cleaning, servicing and oiling is the same as any rotary valve, with the exception of the Olsen valves.
Rotax "might" need a slightly thinner oil that other, and Olsen DEFINITELY thin!!
Spindles still need heavier oil such as the Hetman 13 or other key oil.

Still need to be very careful when disassembling & reassembling ANY valve!!!

Eric
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Re: Rotax Valve Maintenance

Post by harrisonreed » Sun Aug 19, 2018 9:26 pm

Bonearzt wrote:
Sun Aug 19, 2018 5:49 pm
Cleaning, servicing and oiling is the same as any rotary valve, with the exception of the Olsen valves.
Rotax "might" need a slightly thinner oil that other, and Olsen DEFINITELY thin!!
Spindles still need heavier oil such as the Hetman 13 or other key oil.

Still need to be very careful when disassembling & reassembling ANY valve!!!

Eric
But what is the purpose of that adjustable silver metal piece with the hex screw around the spindle screw?

It seems like I shouldn't unscrew the spindle screw and then pop the rotor bearing if I don't know what that piece is doing.
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Re: Rotax Valve Maintenance

Post by Bonearzt » Mon Aug 20, 2018 8:45 am

It secures the stop arm onto the spindle, if we're talking about the same piece. A picture would help if not.

Other than that, they are all similar.

Eric
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tctb
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Re: Rotax Valve Maintenance

Post by tctb » Wed Jun 26, 2019 6:04 am

Trying to take a Rotax valve apart for cleaning. Does anyone have a video or pictures to help avoid doing any that might cause me a problem later when I try and get it back together again?
If I had known trombones were this much fun , I would have got one sooner! :cool:
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Re: Rotax Valve Maintenance

Post by Bonearzt » Wed Jun 26, 2019 1:14 pm

As I mentioned, it's the same as any standard rotary valve except for the stop arm which is held on with a small allen screw.
Everything else is the same!!

Eric
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tctb
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Re: Rotax Valve Maintenance

Post by tctb » Tue Jul 30, 2019 9:26 am

When I tried to take my rotax valve apart it would not comply. Once I had removed the mechanism driving the spindle and removed the rubber stop mechanism no amount of tapping the spindle end would persuade the rotor to come out of its casing. It looked to me as if you would need some sort of mechanical puller to get it to come apart without damaging the components . The screw fit circular cap at the spindle end looks like a neat way of hiding the threads for such a puller . I am stuck . Any ideas?
If I had known trombones were this much fun , I would have got one sooner! :cool:
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Re: Rotax Valve Maintenance

Post by Mikebmiller » Tue Jul 30, 2019 2:24 pm

My local tech had a hard time with the Rotax on my Rath. It took 3 trips to him for him to get it working right after a chem clean. And he is generally very good.
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Re: Rotax Valve Maintenance

Post by Bonearzt » Tue Jul 30, 2019 3:22 pm

As I mentioned, the Rotax valves are the same as any other rotary valve when disassembling other than the set screw holding the stop arm in place.

You unscrew the cap, remove the stop arm and tap on the spindle to pop the back bearing off, the plate under the cap, of the casing and remove the rotor.

Eric
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Re: Rotax Valve Maintenance

Post by harrisonreed » Tue Jul 30, 2019 11:43 pm

The spindle has two screws interacting with it. One is bigger and it's on the end of the spindle. The other is tiny and holds the C-ring onto the spindle.

The instructions say "adjust the stop arm with the screw". Which screw does what? Remove both screws to free the spindle?
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Re: Rotax Valve Maintenance

Post by brassmedic » Wed Jul 31, 2019 2:33 am

Never had a problem taking apart a Rotax valve. It's the same as any other rotary valve. If you have trouble, take it to your friendly neighborhood tech.
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tctb
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Re: Rotax Valve Maintenance

Post by tctb » Wed Jul 31, 2019 2:34 am

Bonearzt wrote:
Tue Jul 30, 2019 3:22 pm
As I mentioned, the Rotax valves are the same as any other rotary valve when disassembling other than the set screw holding the stop arm in place.

You unscrew the cap, remove the stop arm and tap on the spindle to pop the back bearing off, the plate under the cap, of the casing and remove the rotor.

Eric
I appreciate what you say but having hit it with a rubber mallet and then with a wooded one it will not budge . I am reluctant to hit it any harder for fear of doing some expensive damage .
I think this is one for the professionals!
If I had known trombones were this much fun , I would have got one sooner! :cool:
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Re: Rotax Valve Maintenance

Post by harrisonreed » Wed Jul 31, 2019 3:30 am

The C-ring around the spindle is not like just any other valve. I understand that the rest of it is the same, and talking it out after you get the C-ring off is just like any other valve, but I am frustrated by the instructions regarding the stop arm and that C-ring that come with the horn. "Adjust the stop arm with the screw." How? Does that mean I can loosen the tiny screw that goes through the C-ring (like this " Cl. " where C = the silver piece around the main spindle and bigger screw, and "l" is the tiny screw), rotate the rotor core independently of the stop arm, tighten it back up, and now have the rotor out of alignment? Or does it mean I can move the stop arm /C-ring up and down along the axis that the spindle sits on? Is the section of spindle it goes around square like most rotors, or round (friction fit, thus explaining the tiny screw and strange adjustment control idea)?

I was hoping I could figure out what the purpose of the stop arm screw and C-ring design choice was before taking it off (because it is not the same as a normal rotor), but I'm going to just take it apart and figure it out.

When I do I'll write up something here for the dolts like me who believe that the valve is indeed not quite the same design as a regular valve
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Burgerbob
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Re: Rotax Valve Maintenance

Post by Burgerbob » Wed Jul 31, 2019 4:01 am

Some pictures might help this topic.
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Re: Rotax Valve Maintenance

Post by harrisonreed » Wed Jul 31, 2019 4:19 am

Yep, when I get time to take it apart I'll take some pics. I have no doubt that it is nothing for an experienced tech to make sense of, but the design choice of that stop arm has me stumped until I get it off and see what it's around.
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Re: Rotax Valve Maintenance

Post by afugate » Wed Jul 31, 2019 6:22 am

This is from the TubeNet tuba forums.

Image

--Andy in OKC
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Re: Rotax Valve Maintenance

Post by harrisonreed » Wed Jul 31, 2019 7:34 pm

You can see both screws and the C ring/stop arm in the picture.
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