how to add air in rear tires with weird stem

[Kayaker37]

my B7500 has liquid filled rear tires. the left one has a cap with a groove cut in it, that when you flip it over and insert into where you would fill it with air, unscrew an insert. I'm afraid if I unscrew it, the tire will spray liquid or collapse, it's damp on the outside, and too soft when I push in on the center of the tire. is the inner thing you unscrew merely pressing down on a normal valve? seems too deep.

the other rear tire has a normal stem, but when I checked with tire gauge, blew out brown smelly liquid into it. this tire was repaired a few years ago, and it may be beet juice. I rinsed the tire gauge with water in the bathroom and flicked it downwards and sprayed my bathroom door with brown dots! what's the trick here?

I'll upload a picture shortly when I figure out how.

thanks, I realize I should have figured this out years ago, but was afraid to ask.

 

[Jchonline]

If filled properly to about 75% you can rotate the tire so the stem is around 12 oclock. That should be all air. If you still get all fluid they were filled up too much. If you have already done this I wonder if you have a clogged valve stem. I am sure someone here has run across this and will respond soon.

 

[RCW]

If filled properly to about 75% you can rotate the tire so the stem is around 12 oclock. That should be all air. If you still get all fluid they were filled up too much.

Not necessarily. Generally filled without weight on the tire, so with the tire on the ground it might squirt....doesn't mean it's overfilled.

 

[Kayaker37]

If filled properly to about 75% you can rotate the tire so the stem is around 12 oclock. That should be all air. If you still get all fluid they were filled up too much. If you have already done this I wonder if you have a clogged valve stem. I am sure someone here has run across this and will respond soon.

the normal valve stem was at 12:00 when I added air, it's just that some brown liquid came out. I subsequently jacked up the back to deal with the left side with the strange stem. not sure whether or not to completely unscrew what's inside?

 

[200mph]

The 1st picture shows a valve stem cap with integral valve core removal tool built in. Unscrew this cap, flip it over and the inner valve can be removed with it. It's not uncommon to remove the inner valve core when changing tires or any time it's necessary to air down quickly.

In you case, you don't want to remove the valve stem unless you want to get sprayed with fluid. The cap does have to be removed when inflating the tire with air.



https://www.amazon.com/Suriel-Metal-Slotted-Valve-Remover/dp/B01M357RW6/ref=sr_1_3?ie=UTF8&qid=1543690697&sr=8-3&keywords=tire+valve+stem+cap+with+valve+remover

 

[Kayaker37]

If filled properly to about 75% you can rotate the tire so the stem is around 12 oclock. That should be all air. If you still get all fluid they were filled up too much. If you have already done this I wonder if you have a clogged valve stem. I am sure someone here has run across this and will respond soon.

the normal valve stem was at 12:00 when I added air, it's just that some brown liquid came out. I subsequently jacked up the back to deal with the left side with the strange stem. not sure whether or not to completely unscrew what's inside?
hi res pic here:
https://drive.google.com/file/d/1LGR1lSNhb6kL4FyRvxXDrOlw2gfdWRab/view?usp=drivesdk

 

[Kayaker37]

The 1st picture shows a valve stem cap with integral valve core removal tool built in. Unscrew this cap, flip it over and the inner valve can be removed with it. It's not uncommon to remove the inner valve core when changing tires or any time it's necessary to air down quickly.

In you case, you don't want to remove the valve stem unless you want to get sprayed with fluid. The cap does have to be removed when inflating the tire with air.

Guess I'm still not understanding. if I unscrrw the thing that is inside, is there a normal spring loaded valve underneath? The hi res link I posted above should show it better. I tried this cap inverted on a normal valve and it release air. On the weird vskve, something is unscrewing but it does not depress, nor is it shaped like a normal valve. have to add air to the tire I just released air from.

https://drive.google.com/file/d/1F2v6IfaptGZHie28h9eJUMhw2QpfA-EH/view?usp=drivesdk

 

[Kayaker37]

I unscrewed the inner thing and that looks like this?

 

[jzeurcher]

That is called a valve core. You do not want to unscrew that unless you want to release all the air in your tire or if you want to pump out the tire ballast !!!!! Since you took that out it means you now have no air pressure in your tire. Oh by the way all valve stems have to have that valve core in them. Even your auto.


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[North Idaho Wolfman]

You normally wouldn't need to remove the valve in order to put air in the tire, thats a schrader valve / valve core, a broken one at that, that's why it doesn't work, it's supposed to have a stem sticking up.

Go to an auto parts store and get a new one, it might look a little different but as long as the length is the same (there are long and short ones) it will work.

https://en.wikipedia.org/wiki/Schrader_valve

 

[200mph]

It looks like the valve stem core is broken. The part that normally depresses is not there. It could be the valve stem is corroded from the liquid ballast.

It seems like the valve stem core needs to be replaced with a new one.

Link included so you can see what it looks like.
https://www.amazon.com/dp/B0756YTNWG?pf_rd_m=ATVPDKIKX0DER&psc=1&pf_rd_p=7ebdab82-de3b-42f2-8032-aa63ae38b0fa&pf_rd_r=3GHAQX1QRSEX7G98Q3RT&pd_rd_wg=HtbWZ&pf_rd_s=desktop-huc-carousels&pf_rd_t=40701&pd_rd_i=B0756YTNWG&pd_rd_w=5WwqF&pf_rd_i=desktop-huc-carousels&pd_rd_r=9930a685-58cb-4b37-bdd4-0df6bfca91ec&ref_=pd_luc_rh_crh_rh_sbs_02_03_t_img_lh


You might be able to replace using the following style if you can't get the core out.

Example: https://www.ebay.com/i/332563374561?chn=ps

 

[Russell King]

Try looking here for information
http://yourtireshopsupply.com/category/9_865_345/liquid-valves

It looks like you have a normal Shraeder valve that has a dust cap that could be used to remove the core from the valve stem.

Take the cap off like in your picture and you should be able to use a standard air chuck to put air into the valve.

Looking at the picture you posted it looks like the core may be damaged somehow. Take the caps off other tires and compare how this one looks to one that functions properly.

I have never messed much with fluid filled tires so am reluctantly providing the following steps (that may not be 100% correct)

You need to get a good valve stem core to replace the bad one
The tire needs tires have the valve as high as possible at 12:00
You need to jack the tire off the ground so no weight is on it to push fluid out the valve when you remove the core.
Put a jack stand under the axle for safety.
Take the cap off and push the valve stem core down to release the air pressure. Use a small screwdriver or the head of a small brad (nail) to push with.
Don’t be surprised if some fluid sprays out so prepare for that by putting rags or plastic where you don’t want it.
After pressure is gone then remove bad core and replace with good core
Air tire to correct pressure.
Replace dust cap
Remove jack stand and lower tractor to ground

Sorry I see others typed faster than me!

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[Kayaker37]

You normally wouldn't need to remove the valve in order to put air in the tire, thats a schrader valve / valve core, a broken one at that, that's why it doesn't work, it's supposed to have a stem sticking up.

Go to an auto parts store and get a new one, it might look a little different but as long as the length is the same (there are long and short ones) it will work.

https://en.wikipedia.org/wiki/Schrader_valve

OK, thanks, I was slowly coming to the conclusion it was broken!

I can just buy the core itself?

 

[North Idaho Wolfman]

OK, thanks, I was slowly coming to the conclusion it was broken!

I can just buy the core itself?

Yes go to an auto parts store and get one, might look a little different but as long as the length is the same it's good.

 

[Kayaker37]

replaced the core, went to add air, not filling. tried a different air compressor the kind that plugs into the cigarette lighter with built in gauge and pressure maxes out instantly. tried on the front tire and works fine.

could the valve stem have corrosion deeper inside that is blocking air flow? I tried inserting a wd40 extension straw that plugs into the spray nozzle but it stops. there may be a little bit of air in there, wasn't sure whether to try inserting something like a needle, or just call the tractor repair place. I drove the tractor out to the jeep to get to a cigarette lighter outlet, but of course don't want to collapse the tire.

edit: moved back into garage, jacked up, removed tire valve stem core, and inserted opened up paper clip, pushed something in, then a little air and fluid came out, and was able to add air! I'm guessing there is some liquid left in there since it was just low. on to the snowblower.

 

[200mph]

Judging by the picture in post #8 it looks like the bottom half of the valve is broken off and likely still in place. Since the photo isn't ideal in confirming this, I suggest you compare the original to a new one to verify.

You're wd40 straw/tube should likely pass through.

 

[Kayaker37]

Judging by the picture in post #8 it looks like the bottom half of the valve is broken off and likely still in place. Since the photo isn't ideal in confirming this, I suggest you compare the original to a new one to verify.

You're wd40 straw/tube should likely pass through.

I jacked it back up, removed the tire valve stem core, and poked an opened up paper clip through and pushed something through, then some fluid and air came out, reassembled and all good. thanks for everyone's help!

 

[200mph]

Congrats!!!!!!!

Glad you're up and running.