Tire valve question
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Topic author - Posts: 64
- Joined: Sat Apr 15, 2023 9:29 am
- First Name: Jim
- Last Name: Sarc
- * REQUIRED* Type and Year of Model Ts owned: 1926 Roadster Pickup
- Location: West Islip, NY
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Tire valve question
My first T so learning quite a bit. I have 21” wood wheels on my 26 Roadster Pickup. I went to check tire pressure but was surprised when I removed the dust cap on one of the wheels. It looks like the stem and valve are inserted into a larger stem and valve. At first I thought the dust cap cap apart and left part on the wheel but in comparison to the other dust caps it doesn’t seem that’s the case. Before monkeying around I figured I’d asked the club. What setup do I have in this wheel and how do I access the valve to check pressure and pump up? Didn’t want to break anything
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Re: Tire valve question
Those are accessory stem covers to look like old timey covers ! The adapter came off from inside.
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Re: Tire valve question
You have an aftermarket dust cap setup designed to adapt to a modern rubber stem tube. The threaded insert inside is adjustable to compensate for different heights of rubber stems. I am running them right now on my 1912 Flanders 20 because it came to me with rubber stem tubes and I don't want to change them out for now.
https://www.modeltford.com/item/DC-RSBR.aspx
Model T Fords originally came with Schrader 777 stems that clamped the rubber tube, see the attached pics. Although valve caps and dust covers are fairly available, the stems and other parts themselves can be hard to find. If you want to switch to Schrader 777 metal stems, keep an eye out on Ebay and the classifieds here. Schrader 888 stems will also work, they are 1/4 inch shorter than the 777 stems. You can cut the rubber stem off of a modern tube and insert the Schrader 777 or 888 stem like this:
http://sheepisland.com/cars/tech/metal_stems/
The metal stem tubes currently available from the vendors use a larger size metal stem, not compatible with Schrader 777 hardware. Some folks run them anyway.
Do a Google search for "schrader 777 stem mtfca" and lots of older threads will show up.
https://www.modeltford.com/item/DC-RSBR.aspx
Model T Fords originally came with Schrader 777 stems that clamped the rubber tube, see the attached pics. Although valve caps and dust covers are fairly available, the stems and other parts themselves can be hard to find. If you want to switch to Schrader 777 metal stems, keep an eye out on Ebay and the classifieds here. Schrader 888 stems will also work, they are 1/4 inch shorter than the 777 stems. You can cut the rubber stem off of a modern tube and insert the Schrader 777 or 888 stem like this:
http://sheepisland.com/cars/tech/metal_stems/
The metal stem tubes currently available from the vendors use a larger size metal stem, not compatible with Schrader 777 hardware. Some folks run them anyway.
Do a Google search for "schrader 777 stem mtfca" and lots of older threads will show up.
Mark Strange
Hillsboro, MO
1924 Cut-off Touring (now a pickup)
Hillsboro, MO
1924 Cut-off Touring (now a pickup)
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Re: Tire valve question
Jim
the answer to your question is this: your aftermarket valve cover has come apart and left part of itself stuck/threaded onto the tire valve. Use a padded pair of pliers on those threads and they will screw right off, leaving a normal looking rubber stem exposed, to which you may add air.
Your old cover may or may not be repairable by applying a small dab of epoxy and screwing the thread adapter back in.
the answer to your question is this: your aftermarket valve cover has come apart and left part of itself stuck/threaded onto the tire valve. Use a padded pair of pliers on those threads and they will screw right off, leaving a normal looking rubber stem exposed, to which you may add air.
Your old cover may or may not be repairable by applying a small dab of epoxy and screwing the thread adapter back in.
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
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Re: Tire valve question
Jim - carefully twist off the little brass piece off the tube stem then air up your tire. You need a large hex wrench to screw the adapter back into the cover.
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Re: Tire valve question
The metal stem tubes currently available from the vendors use a larger size metal stem, not compatible with Schrader 777 hardware. Some folks run them anyway.
That would be me. When I first started replacing rubber stems with original metal ones, I used the larger size (Schrader 724 and 725) because they were what I happened to have. All the new dust covers and most of the decent originals I've found fit that size, so I continue to use them. It's unlikely that I'll buy any new metal stem tubes, but if I do my dust covers will fit them.
https://dauntlessgeezer.com/DG110.html
The inevitable often happens.
1915 Runabout
1923 Touring
1915 Runabout
1923 Touring
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Re: Tire valve question
It shouldn't be on there super-tight. Once you get it off, screw it into the inside of the dust cover far enough to keep it from bottoming out on the threaded part of the rubber stem before the dust cover bottoms out on the felloe. The ones I bought for my Flanders came with a round rubber gasket on the bottom to act as a cushion between the dust cover and the wheel felloe.
Mark Strange
Hillsboro, MO
1924 Cut-off Touring (now a pickup)
Hillsboro, MO
1924 Cut-off Touring (now a pickup)
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Re: Tire valve question
Here is same type repro cap for rubber stem tubes in brass. The insert is threaded for the valve stem, and is adjustable for depth depending on the wheel application. Once you get the insert out, it has very small splits that you can pry out just a little, and that gives resistance to backing off with the larger threads inside the repro cap. The insert uses a 3/8" hex wrench to position it back to where you want it, trial and error, but you'll want the cap to bottom out on the wheel felloe, or that insert can stick like that one did.
The best way is always the simplest. The attics of the world are cluttered up with complicated failures. Henry Ford
Don’t find fault, find a remedy; anybody can complain. Henry Ford
Don’t find fault, find a remedy; anybody can complain. Henry Ford
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- Posts: 2401
- Joined: Fri Jan 04, 2019 4:17 pm
- First Name: Mark
- Last Name: Strange
- * REQUIRED* Type and Year of Model Ts owned: 1924 Cut Off Touring (now a pickup)
- Location: Hillsboro, MO
- MTFCA Number: 30944
- MTFCI Number: 23667
- Board Member Since: 2013
Re: Tire valve question
Now if they only made those with a round, knurled base instead of hex!
Mark Strange
Hillsboro, MO
1924 Cut-off Touring (now a pickup)
Hillsboro, MO
1924 Cut-off Touring (now a pickup)
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Topic author - Posts: 64
- Joined: Sat Apr 15, 2023 9:29 am
- First Name: Jim
- Last Name: Sarc
- * REQUIRED* Type and Year of Model Ts owned: 1926 Roadster Pickup
- Location: West Islip, NY
- Board Member Since: 2023
Re: Tire valve question
Thanks to all. Got it straightened out.