Valve caps popping off? Bookmark and Share

Valve caps popping off?

Postby emoran » Wed Jun 19, 2019 3:38 pm

I have a Bach 879 (Olds 99 clone) that used to throw the 1st valve cap off when I bought it 30 plus years ago. This was fixed by ordering all new caps, but now the 1st valve cap only threads on about 1 1/2 turns to full lock. Any ideas? Did the valve shrink, the cap expand?
ed..
Last edited by emoran on Sat Jun 22, 2019 11:10 am, edited 1 time in total.
emoran
lurker
lurker
 
Posts: 8
Joined: Sat Jun 15, 2019 11:32 am
Location: cocoa, fl.

Re: Vave caps popping off?

Postby KingBassTrombone » Thu Jun 20, 2019 8:38 am

I'm gonna guess that the threads on the valve casing were worn out by the old stripped caps. Screwing new/re-threaded caps onto half-worn casing threads can cause that to happen, since a few of the old threads are rounded off or missing.
1933 York 706 BBb tuba (adjustable rec. bell)
1902 C.G.Conn Elkhart & New York BBb HeliConn
1873 Evette & Schaeffer 4v Bb Bass Saxhorn
...and more than 15 other low brass...
User avatar
KingBassTrombone
bugler
bugler
 
Posts: 52
Joined: Mon Dec 11, 2017 4:45 pm
Location: Toledo, OH or Fremont, OH

Re: Vave caps popping off?

Postby The Big Ben » Thu Jun 20, 2019 11:01 am

emoran wrote:I have a Bach 879 (Olds 99 clone) that used to throw the 1st valve cap off when I bought it 30 plus years ago. This was fixed by ordering all new caps, but now the 1st valve cap only threads on about 1 1/2 turns to full lock. Any ideas? Did the valve shrink, the cap expand?
ed..


I feel your pain....

I had one cap that would get loose/stuck on my 099-4. It was on the 4th valve so it wasn't that big deal if it got stuck half on or half off during a practice but annoying. I tried one of the valve/valve caps I was not having trouble with in the 4th hole and it worked fine so it definitely was the cap. I replaced all four caps (with groovy silver plated caps) and haven't had the problem ever since. I was afraid that it was the thread on the casing which might have been a terminal disease (or at least a chronic condition) on one of these refugees from a junior high band room but I guess I got lucky.

I sometimes was able to get that 4th valve cap to work by jiggling it as I was screwing it in. A touch of grease helped a little, too. You might try one of the other valves in the 1st hole to see if it is just a worn cap. Maybe you could replace just one cap.
User avatar
The Big Ben
6 valves
6 valves
 
Posts: 3083
Joined: Sat Dec 16, 2006 12:54 pm
Location: Port Townsend, WA

Re: Vave caps popping off?

Postby emoran » Thu Jun 20, 2019 11:19 am

Thanks for the info. I did keep all the original caps, so I'll pull the first valve, and try them. I also want to try the grease on the casing. Hope I don't have to resort to duct tape!
emoran
lurker
lurker
 
Posts: 8
Joined: Sat Jun 15, 2019 11:32 am
Location: cocoa, fl.

Re: Vave caps popping off?

Postby bloke » Thu Jun 20, 2019 11:21 am

How about this?

Take it to someone who has successfully remedied that problem quite a few times before, and pay them a little bit of money to solve it with your instrument.

It's really easy to make problems like that worse, and it's a really good idea to hand these problems over to someone who immediately sees just what's wrong, and who knows just what to do.
User avatar
bloke
musician/technician/innovator
musician/technician/innovator
 
Posts: 44290
Joined: Sat May 08, 2004 6:04 pm
Location: western Tennessee

Re: Vave caps popping off?

Postby The Big Ben » Thu Jun 20, 2019 12:51 pm

bloke wrote:Take it to someone who has successfully remedied that problem quite a few times before, and pay them a little bit of money to solve it with your instrument.


I did. Where do you think I got the groovy silver caps?
User avatar
The Big Ben
6 valves
6 valves
 
Posts: 3083
Joined: Sat Dec 16, 2006 12:54 pm
Location: Port Townsend, WA

Re: Vave caps popping off?

Postby emoran » Sat Jun 22, 2019 11:15 am

bloke wrote:How about this?

Take it to someone who has successfully remedied that problem quite a few times before, and pay them a little bit of money to solve it with your instrument.

It's really easy to make problems like that worse, and it's a really good idea to hand these problems over to someone who immediately sees just what's wrong, and who knows just what to do.

I originally had this fixed by a tech in Orlando, fl. But he has since moved to Tennessee to build Trombones. He ordered the replacement caps for me. We are limited here on the Space Coast on repair locations, but I agree with your comments.
By the way, the felts I ordered from you for the valves are great. Thanks
emoran
lurker
lurker
 
Posts: 8
Joined: Sat Jun 15, 2019 11:32 am
Location: cocoa, fl.

Re: Valve caps popping off?

Postby Rick F » Sat Jun 22, 2019 3:22 pm

It's been awhile but I've used Billy Birthrong at Brass and Reed in Daytona Beach, FL. He does excellent work. I've taken my horn there on the recommendation of Gail Robertson when she was still in Orlando.
Miraphone 5050 - Warburton (Brandon Jones)
YEP-641S (on long-term loan to grandson)
DE mpc (102 rim; I-cup; I-9 shank)
User avatar
Rick F
5 valves
5 valves
 
Posts: 1654
Joined: Fri Mar 19, 2004 12:47 am
Location: Lake Worth, FL

Re: Valve caps popping off?

Postby groovlow » Sun Jun 23, 2019 12:16 pm

Second affirmation
Billy at Brass and Reed
Joe H
User avatar
groovlow
bugler
bugler
 
Posts: 211
Joined: Thu Jun 16, 2011 5:21 pm
Location: Nashville TN

Re: Valve caps popping off?

Postby emoran » Thu Jul 18, 2019 9:38 am

Got the horn back from the shop, and the first valve cap was replaced, more new caps on order. Also new water key corks, and a solder leak fixed I didn't know I had. All done with no missing of rehearsals. And yes Bloke, for not much money. Thanks for all the good info. everyone.
emoran
lurker
lurker
 
Posts: 8
Joined: Sat Jun 15, 2019 11:32 am
Location: cocoa, fl.

Re: Valve caps popping off?

Postby bloke » Thu Jul 18, 2019 9:34 pm

general observation:

Reynolds TB-10 tubas (same friggin' tuba with some cosmetic differences) top caps often seem to generally be subtly tighter-threaded than Olds O-99.

Someone else could possibly solve this problem in the future by swapping out a set of Olds for a set of found-somewhere Reynolds caps.

Too-tight caps can be fitted by turning and tapping until they screw down all the way (tedious/effective).

fwiw, the Reynolds caps call for a felt ring (like old-style King top caps).
User avatar
bloke
musician/technician/innovator
musician/technician/innovator
 
Posts: 44290
Joined: Sat May 08, 2004 6:04 pm
Location: western Tennessee


Return to Repair, Modification, and Construction

Who is online

Users browsing this forum: No registered users and 2 guests