Community Forums

rrtribble · 05-11-2019, 07:11 PM

Getting DP ready to hit the road real soon so was checking tire pressure and right inner dully registered ZERO. Got my hose out, started engine and brought air up to 130psi. Attempted to air up tire but it wouldn't go in. Extender was loose when I checked it so I removed it and tired to air the tire again to no avail.
Worse case senario was a bad tire - no bead or inside blow out.
Took it to POMPS. It was a piece of rubber from the o ring inside the extender that was blocking the inlet and had ruined the valve core. Replaced entire valve stem and all working well again.

Looking at the old valve stem the threads had been stripped, probably on installation.

Another lesson learned.

Stay safe - Richard

ByeTheWay · 05-11-2019, 08:10 PM

For future reference: One piece Valve Stems
Your Tire Shop
Your Tire Shop Supply | Supplies for Tire Shops
I've been using them on my 22.5" dually's for 3 years w/o an issue.

Wayne M · 05-11-2019, 08:47 PM

If you have run that tire flat - it's toast. Also the other tire was carrying all the load and should be checked by a professional or tossed.

vsheetz · 05-11-2019, 11:03 PM

Get rid of extensions. Imho.

Regular stems and reach through the outer wheel. Or one piece long valve stems (preffered) that extend through the outer wheel with a stabilizer.

Wayne M · 05-12-2019, 01:19 PM

Take a look at Dually Valve Stems

These are not extensions but actual valve stems for duals. Also a rubber grommet can be put in the hole of the rim to stabilize the stem.

Extensions "can" cause problems.

rrtribble · 05-12-2019, 01:50 PM

ByetheWay - Thanks, I'll check them out.

Wayne - tire wasn't actually flat, a little low. The rubber had blocked the valve stem keeping air from going in our out.

Thanks everyone. Having a molar pulled 5/22 and then planning on heading out - weather permitting.

Drive safe - Richard

tap4154 · 05-12-2019, 02:02 PM

I think the main thing, whether you use hard extenders or braid extensions, is to replace them every few years. Both have seals and cores that can go bad, and the braided extensions have a rubber tube under the SS braid that will eventually crack (as I found out recently).

Wayne M · 05-12-2019, 09:40 PM

Richard,
If it was 50% less than the maximum inflation pressure it is considered flat.

Just be careful.

Earl II · 05-12-2019, 09:49 PM

Quote:

Originally Posted by Wayne M

Take a look at Dually Valve Stems

These are not extensions but actual valve stems for duals. Also a rubber grommet can be put in the hole of the rim to stabilize the stem.

Extensions "can" cause problems.

Just went through the same scenario with our two month old Bay Star. The rubber tubed extenders are pretty risky. I had the dually valves installed and now have some confidence in the tires back. Just wish Newmar would have not installed these cheap valve extensions in the first place.

rrtribble · 05-13-2019, 10:01 AM

POMPS checked both tires and okay. There was a lot of air in the tire as the valve core was blocked by the torn o-ring from the extender but they didn't check air pressure once they got the rubber out as the valve core was damaged and started letting air out. They took out the valve sore and it took several minutes before they could start on breaking down the tire.
When I was checking it out before I took it in it looked full of air as there was no flat angle at the bottom but I couldn't get any air pressure - it was blocked.

I run with 80psi in the front and 90psi in the rear based on 4 corner weight and she rides like a dream. At 110psi in the front and 95psi in the rear according to placard it rides so rough it's like getting beat up.

Looking forward to hitting the road in June for some summer trips and revved up for winter as I hope to spend some time where it is warm.

riverforest · 05-13-2019, 09:10 PM

Quote:

Originally Posted by ByeTheWay

For future reference: One piece Valve Stems
Your Tire Shop
Your Tire Shop Supply | Supplies for Tire Shops
I've been using them on my 22.5" dually's for 3 years w/o an issue.

Quote:

Originally Posted by Wayne M

Take a look at Dually Valve Stems

These are not extensions but actual valve stems for duals. Also a rubber grommet can be put in the hole of the rim to stabilize the stem.

Extensions "can" cause problems.

been looking at these. they come chrome or brass. not sure which ones to order ?

TonyMac · 05-14-2019, 04:56 PM

Can these Dually Valve Stems support a TST 510 pressure/temperature sender?

Dmiles · 05-14-2019, 06:13 PM

Quote:

Originally Posted by TonyMac

Can these Dually Valve Stems support a TST 510 pressure/temperature sender?

The information on their web site says it "can" work with external sensors, but not internal. I may be splitting hairs (it's what I do) but I prefer hear "will" instead of "can".

They have a toll free number on their web site, option 4 for dually valve stems. I was able to just catch Kelly before they closed up for the day 5pm Pacific. She was very knowledgeable. She gave me the kit number that I needed just from my model year, and chassis. She verified that I have dual steel wheels with oval holes. I'm always impressed when I tell someone I have a Ford F53, and they don't reply with something like "you mean a 450, or super Duty?" Still amazed that most guys who spend their entire work days behind a counter in a parts store have no idea what a Ford F53 is. But I digress.

$140 bucks seems like a lot to spend on valve stems, but I've had it with whatever I can find to "make it work" And it's cheap compared to the price of a tire.

I just ordered new tires, and I've got a few weeks before my next trip. I think I'm going to bite the bullet.

Who votes for brass, and who votes for chrome, and why?

I see no reason why these would not support sensors, but I'm going to call them back tomorrow to discuss it further.