Can't put air in rear tires

[rquad]

I can't get an air chuck on the valve stem of my rear tires to put air in them. They have an oddball stem that my research shows to be a special valve used for air/liquid fill. The valve has a "screwdriver" cap on it, but underneath that it appears to be a regular Schraeder (sp?) valve fitting with threads and the little activator tip in the middle. The only visual difference is that the stem is metal instead of rubber. After removing the cap, my air chuck appears to fit over it, but will not press down enough to activate the tip and flow air.

There's more back-story to this. I found the hard way that the previous owner had filled the tires with some sort of liquid - best guess is antifreeze. I was trying to check the tire pressure, and it turned out the valve stem wasn't tight, and instead of unscrewing the cap, the whole stem came off and sprayed most of the liquid all over my shop floor. I'm glad the rear tires only run 20 psi!

I rotated the tire up and was going to just put air in it until I got a chance to re-do the liquid fill, but my chuck won't engage. I have a standard air chuck (the kind that's about 8 inches long, and has the double-ended tip set at about 45 degrees). The chuck works fine on the front tires, and on all my other vehicles.

Where can I get a chuck that works with these stems, and what do I even look for to find one?

 

[Tx Jim]

I've never seen the type valve stem you describe & I've filled more rear tractor tires with fluid than I desire to count. Can you please post a photo of your tractors valve stem?

 

[Tooljunkie]

Some chucks can be an issue if valve core is screwed in too far. I haev had some chucks that wouldnt fill all tires. Guess thats why you call them chucks-chuck em when they dont work.

 

[rquad]

I've never seen the type valve stem you describe & I've filled more rear tractor tires with fluid than I desire to count. Can you please post a photo of your tractors valve stem?

I'm not where I can get a picture right now, but here's a link to something that looks exactly like what I have...

https://www.amazon.com/Milton-464-Valve-Core-Housing/dp/B001O2W1VY/ref=pd_sim_263_8?_encoding=UTF8&pd_rd_i=B001O2W1VY&pd_rd_r=C3X7CA5TAAMEM2ZZGHWB&pd_rd_w=yWra6&pd_rd_wg=ad5Iw&psc=1&refRID=C3X7CA5TAAMEM2ZZGHWB

 

[scdeerslayer]

That's a valve stem cap that you can use to remove the valve core. I've got at least one on every tractor so I know where to find one. Remove the cap and fill as normal (at the 12 O'clock position). Use a small screwdriver to see if you can press in on the valve core stem. The valve cores may be corroded shut and need replacing (at least you've got two tools to remove them).

 

[D2Cat]

Look into the piece you removed to allow the fluid out. You should be able to see light through it. Probably has a piece of crud lodged in it. Need to take a piece of wire and clean it out.

When you go to refill the tire the connector used to fill fluid into tires will screw onto the piece that is now left on the wheel, for a faster fill. Just have to be sure the valve stem is in 12 O'clock position.

 

[North Idaho Wolfman]

If I'm understanding your issue, you don't remove the center portion to fill with air, just to fill with liquid.
As D2Cat said, sounds like you have a plugged up valve, use a Schrader valve remover (like the silver piece in your picture), remove the core, remove the stem insert from the rim (with stem at 12:00), clean out the hole and the stem so air will pass through the stem.

 

[redfernclan]

That's the same stem as in the tubes they use on skidders here in the PNW. Small stem has a standard schrader.

 

[Russell King]

By the way take the weight off the tires before you do anything to the valve stems- but you already know that!


Sent from my iPad using Tapatalk

 

[rquad]

And the winner is...ToolJunkie. You were correct that it was the air chuck. I bought a new one and was able to fill the tire with no trouble. I have no idea why the old chuck didn't work since it worked on other tires I tried.

As for the valve stems I have, I don't know why they're called air/water valves. After investigating they don't seem any different than any other valve stem. The thing that fooled me was core removal tool for a cap - I'd never seen one of those before.

Anyway, thanks for all the responses, and for getting me "back on the road."

 

[D2Cat]

And the winner is...ToolJunkie. You were correct that it was the air chuck. I bought a new one and was able to fill the tire with no trouble. I have no idea why the old chuck didn't work since it worked on other tires I tried.

As for the valve stems I have, I don't know why they're called air/water valves. After investigating they don't seem any different than any other valve stem. The thing that fooled me was core removal tool for a cap - I'd never seen one of those before.

Anyway, thanks for all the responses, and for getting me "back on the road."

Look at the picture of the Milton you linked to. The part with the knurl and part number is removed from a threaded stem that was still on your wheel when you removed that core. When you add a liquid you can screw the fitting directly onto the part after you removed the stem for better volume flow.

That is what's different from regular air only valve stems. You can get liquid in the regular stems, but you will take some time.