Dually tire valves???

[Creativepart]

I'm guessing you are mistaken and perhaps the extension valve stem is just not screwed all the way down on the inner tire OR you have a cap on the end that's not working properly.

Ours came with a kind of cap on the end of the extension that had a spring loaded ball bearing on the end that sealed the stem but was supposed to let you check pressure and add air through it. I found a number of those that didn't work - and you couldn't add air or check the pressure through them as designed.

All I had to do is remove those "caps" and everything worked normally.

[MNtraveler]

Originally Posted by Creativepart

I'm guessing you are mistaken and perhaps the extension valve stem is just not screwed all the way down on the inner tire OR you have a cap on the end that's not working properly.

Ours came with a kind of cap on the end of the extension that had a spring loaded ball bearing on the end that sealed the stem but was supposed to let you check pressure and add air through it. I found a number of those that didn't work - and you couldn't add air or check the pressure through them as designed.

All I had to do is remove those "caps" and everything worked normally.

Take off the cap on the end and what you have is basically a hollow tube. Something is wrong. The dealer gets that on the punch list. Glad to find it in town, not in the boonies.

[elynnkelley]

I decided to put a TPMS on my Forester, and also went ahead with metal valve stems and extenders. I have read that original equipment rubber stems often fail with monitoring systems. It's not a cheap add on, but I think I will feel better knowing the pressure is ok on the RV and toad.

[Tireman9]

Originally Posted by MNtraveler

Next dumb question! We were surprised on our new 2401R to find that the extension tubes for both inside rear tires seem to have "nothing" inside the tubes. When putting a pressure gauge on the tubes, no reading can be taken and there is no apparent way to add air. What's this about? Shouldn't the extender tube extend the ability to check and add air?

There are two types of hose extenders

"Airless" These have a long wire inside that is suppose to open the valve core in the valve on the tire. This would then fill the hose with the air from the tire and allow a pressure check to be made or for air to be added to the tire. You can confirm this with the hose removed and press the pin in the outboard end. Is there a pin that moves at the tire end? If so you have an Airless hose extender. If you can't measure or add air with this host then the valve core in the valve stem on the wheel is set too far into the valve body. You may need a new core. I believe that with this type hose you should not hear air leak when you first attach the hose.

Pressurized hoses have a regular valve core at the outer end and a solid pin at the tire end. When you screw this type of hose on you should hear air leak out till the hose is tightened 1/4 to 1/2 turn past the point when air leak stops. This means the hose is carrying the air from inside the tire all the time. So when you check the pressure or add air you only open the standard valve core at the outer end.

Hope this helps.

[MNtraveler]

Originally Posted by Tireman9

There are two types of hose extenders

"Airless" These have a long wire inside that is suppose to open the valve core in the valve on the tire. This would then fill the hose with the air from the tire and allow a pressure check to be made or for air to be added to the tire. You can confirm this with the hose removed and press the pin in the outboard end. Is there a pin that moves at the tire end? If so you have an Airless hose extender. If you can't measure or add air with this host then the valve core in the valve stem on the wheel is set too far into the valve body. You may need a new core. I believe that with this type hose you should not hear air leak when you first attach the hose.

Pressurized hoses have a regular valve core at the outer end and a solid pin at the tire end. When you screw this type of hose on you should hear air leak out till the hose is tightened 1/4 to 1/2 turn past the point when air leak stops. This means the hose is carrying the air from inside the tire all the time. So when you check the pressure or add air you only open the standard valve core at the outer end.

Hope this helps.

Thanks - there is neither a wire nor a normal valve core within the extension tube. It is hollow on both sides from what I can see.

[JLeising]

On the "AirFlex" airless extenders I find the black plastic "core" is easy to pull out. Possible, if run without valve caps, that the cores flew out.
Also of note, several of us have found the AirFlex cores were in place, but were too short to be properly depressed by either a tire pressure guage or an air chuck. I corrected by cutting off some (maybe 1/8 inch) of the outer "tube" to better expose the core. Pulled the core out while cutting the tube (didn't want to cut both...).

[MNtraveler]

Originally Posted by JLeising

On the "AirFlex" airless extenders I find the black plastic "core" is easy to pull out. Possible, if run without valve caps, that the cores flew out.

Also of note, several of us have found the AirFlex cores were in place, but were too short to be properly depressed by either a tire pressure guage or an air chuck. I corrected by cutting off some (maybe 1/8 inch) of the outer "tube" to better expose the core. Pulled the core out while cutting the tube (didn't want to cut both...).

Thanks! I'll get to the bottom of this!

[Tireman9]

Originally Posted by MNtraveler

Thanks - there is neither a wire nor a normal valve core within the extension tube. It is hollow on both sides from what I can see.

Sounds like the part was defective in that parts were missing. I see no reason to have to modify this type of safety related part. The selling dealer should stand behind what they sell.

A hose extender that does not allow either the measurement or addition of air is defective IMO and a complaint should be filed with NHTSA,

[JLeising]

Several past threads on this issue - e.g.
http://www.forestriverforums.com/for...ure-45973.html

[MNtraveler]

Update: our dealer says the valve extensions have to be replaced and they are on order. He may have said they were missing but we discussed multiple items in that call.

[Creativepart]

I have two inside tires missing valve stems from the factory. My dealer said they are "on order".