Valve stem assembly leaks

Post your tech questions here, lots of knowledge available.
Post Reply
jamie200a+
Junior Member
Posts: 5
Joined: Fri Mar 26, 2021 10:47 pm

Valve stem assembly leaks

#1

Post by jamie200a+ »

Hi guys and gals, I am new to the hobby. I have a 1955 200A that I am trying to restore. My problem is: the valve stem assembly does not shut off fuel. When pumped up, it continues to feed fuel up through the generator, regardless if the valve stem is on or off. Any suggestions for help would be greatly appreciated. Thank you for taking the time to read my “rookie” issue.😊
zoomkat
Super Colemanaholic
Posts: 1701
Joined: Mon Sep 28, 2015 11:17 pm

Re: Valve stem assembly leaks

#2

Post by zoomkat »

You might search the forum for "valve tip" and similar for previous post about valve tip leakage and wear, and how to fix.
jamie200a+
Junior Member
Posts: 5
Joined: Fri Mar 26, 2021 10:47 pm

Re: Valve stem assembly leaks

#3

Post by jamie200a+ »

Ok!.. thank you for your response.👍😊
User avatar
Tgarner01
Super Colemanaholic
Posts: 5571
Joined: Sun Nov 03, 2019 10:47 pm

Re: Valve stem assembly leaks

#4

Post by Tgarner01 »

Check for crud on the valve seat while you're in there. Not common, but it does happen.
Toby Garner, from SW Missouri
ICCC #1939
User avatar
JimL
Super Colemanaholic
Posts: 6409
Joined: Thu Mar 05, 2015 3:54 pm

Re: Valve stem assembly leaks

#5

Post by JimL »

Yeah, that can happen when a previous owner thinks a lantern should shut off like a light switch and they keep cranking down on the valve stem. It can take up to a minute or two for a lantern to completely extinguish. The reason is that there is still fuel in the generator vaporizving and feeding fuel to the mantle. When it's cranked down, a groove gets worn into the soft brass of the valve stem cone, and often where it enters the valve.

On the chance that there's debris preventing shutoff, you could try removing the generator, opening the valve, pumping up a bit to get a gusher of fuel through the valve, shut it off and reassemble. Although I really suspect it's a grove worn in as that is generally more common.

Here's one thread on addressing a groove in the stem.
https://www.colemancollectorsforum.com/ ... =5&t=10485
-Jim

I threw a boomerang a couple years ago; I now live in constant fear.

Flammable liquids, open flame, what could go wrong?
jamie200a+
Junior Member
Posts: 5
Joined: Fri Mar 26, 2021 10:47 pm

Re: Valve stem assembly leaks

#6

Post by jamie200a+ »

Thanks guys, I will try your suggestions and keep my fingers crossed. LOL.😊
User avatar
Stovie
Colemanaholic
Posts: 388
Joined: Thu Dec 17, 2020 1:46 am

Valve stem assembly leaks

#7

Post by Stovie »

If it's just the stem needle that is buggered it's a pretty easy (and effective) repair to make. Probably something that should be done anyway as part of "fettling" in general, brass is very soft and prone to this. But, by the same token since it is so soft it cleans up quickly.
Broad is the path that leads to destruction.

Especially those red headed broads, they are a sure path to ruination.
jamie200a+
Junior Member
Posts: 5
Joined: Fri Mar 26, 2021 10:47 pm

Re: Valve stem assembly leaks

#8

Post by jamie200a+ »

Ok! It appears as if a few of the stem threads are damaged/ stripped.Can I “ re-tap” the threads?
User avatar
Stovie
Colemanaholic
Posts: 388
Joined: Thu Dec 17, 2020 1:46 am

Valve stem leaks

#9

Post by Stovie »

I believe the issue at hand here most likely isn't the threads, but rather the needle & seat. The "pointy tip" as it were, gets gouged, or has groove damage. Can try running a thread chaser over the threads I guess. Maybe just purchase a replacement stem.
Broad is the path that leads to destruction.

Especially those red headed broads, they are a sure path to ruination.
jamie200a+
Junior Member
Posts: 5
Joined: Fri Mar 26, 2021 10:47 pm

Re: Valve stem assembly leaks

#10

Post by jamie200a+ »

Ok! Thanks again for the advice.😊
User avatar
Stovie
Colemanaholic
Posts: 388
Joined: Thu Dec 17, 2020 1:46 am

Valve stem assembly

#11

Post by Stovie »

Pics, man, we need pics!
Broad is the path that leads to destruction.

Especially those red headed broads, they are a sure path to ruination.
Post Reply