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01-21-2017, 07:20 PM
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#1
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Senior Member
Join Date: Oct 2014
Location: Dallas
Posts: 377
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Valve Stem Extenders & TMPS
We have a Redhawk with the factory installed inner dual extenders and the TST 507 TMPS. The driver side sensor reads the pressure just fine but the passenger side either reads nothing or 5psi. I've tried changing the sensors around among other things with no success to get it to work. That particular extender is also more difficult to get air into.
I can't decide if I want to get new extenders or ditch them entirely and just put the sensor straight onto the valve stem.
What configuration have you had good luck with? If you've used extenders do you have any brands you could recommend.
Thank you!
__________________
2017 Jayco Redhawk 29XK - SOLD 10/19
2015 Wrangler JKU
2019 Ford F-250
2019 Open Range 310BHS - (a Jayco Division)
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01-21-2017, 09:55 PM
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#2
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Senior Member
Join Date: Mar 2015
Location: Port Orchard
Posts: 2,064
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I use 135 degree Wheelmaster valve extenders on my outside duals and my 507s work fine. Go with the Wheelmaster extenders as I went with cheaper ones that immediately ended up in the trash.
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Don
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01-21-2017, 11:25 PM
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#3
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Senior Member
Join Date: Apr 2016
Location: Morganton
Posts: 724
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I had one valve extender that acted the same way inside extender was a rubber liner it had collapsed
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01-22-2017, 09:44 AM
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#4
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Senior Member
Join Date: Jun 2010
Location: Saskatoon Sask Canada
Posts: 10,714
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I have found that sometimes the valve stem gets run too far into the tire valve so try taking a tool and backing out the valve stem 1 turn if that don't work try 2 turns.. and see if that helps...
__________________
Seann
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 900watts of solar, Lithium batteries (400amp hour), 2000 watt (4000 surge) whole house inverter.
145days boondockinig in2023 2022/151 2021[/COLOR]
93/2020,157/2019219/2018 206/2017,215/2016, 211/2015, 196/14, 247/13, 193/12
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01-22-2017, 07:41 PM
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#5
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Senior Member
Join Date: Mar 2015
Location: Riverview
Posts: 316
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As I got the flow thru valves, I had to remove the fancy hubcaps. Also I removed the valve extenders. 30,000 miles later, and I still like these.
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Carl & Dawn
2015 Greyhawk 31FS (with 4x4 conversion by Ujoint Offroad)
2012 Lincoln MKZ Hybrid (our TOAD on a DEMCO Dolly)
DW, DSx2, DDx2 Catx2 Dog
Tampa Bay Area of FL
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01-23-2017, 03:36 PM
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#6
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Senior Member
Join Date: Feb 2016
Location: Lafayette, LA
Posts: 285
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I asked my tire dealer about removing those tire extenders completely.
He said they are needed because of the high tire pressure (75 lbs front / 80 lbs rear) of the RV tires.
Without the extenders, there is a possibility of tire valve failure.
SO, I left mine on.
__________________
Wilson Boudreaux
From Cajun Country
Jayco 2016 Grey Hawk 29MV Champagne
Toad - '16 Subaru Forester (Pearl White - manual transmission)
Blue Ox (everything) for the TOAD
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01-24-2017, 07:33 AM
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#7
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Senior Member
Join Date: Mar 2015
Location: Riverview
Posts: 316
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My TST flow through sensors did not work with the valve extenders at all. All wheels have steel valve stems, and the flow through sensors are nearly as long as the extenders. I can reach them with no problem.
Without the flow through sensors, the inner valve stems would be nearly impossible to get to.
The passenger inner is the one that gets the hottest, which is a lead indicator for tire failure. The exhaust runs down the passenger side of the chassis causing more heat on that tire. Got stuck in traffic in Atlanta during the summer and my tire temp rose to over 130f, and I decided it was time for us to take a break... We made lunch and let the tires cool off.
As to what your tire guy said, the outer tire doesn't have an extender, so I am thinking his reasoning might be flawed or he was answering a different question that he thought he heard.
Your cold psi quickly rises once you roll. Cold front tires at 75 quickly get to over 80 and the rears quickly get to over 90 in nominal conditions. What I have begun doing lately (last 10,000 or so) is running the inner duallies a couple pounds less when cold. Once rolling they quickly equalize with the outer tires and has less thermal load than normal.
I have over 30,000 miles with this configuration over the last 18 months.
__________________
________
Carl & Dawn
2015 Greyhawk 31FS (with 4x4 conversion by Ujoint Offroad)
2012 Lincoln MKZ Hybrid (our TOAD on a DEMCO Dolly)
DW, DSx2, DDx2 Catx2 Dog
Tampa Bay Area of FL
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01-24-2017, 02:31 PM
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#8
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Senior Member
Join Date: Oct 2014
Location: Dallas
Posts: 377
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Thank you for the info.. This is exactly what I wanted to do but hadn't found anyone to validate my theory.
I'll order a set of flow through sensors for the inner duals and remove the extenders.
Quote:
Originally Posted by CarlB
My TST flow through sensors did not work with the valve extenders at all. All wheels have steel valve stems, and the flow through sensors are nearly as long as the extenders. I can reach them with no problem.
Without the flow through sensors, the inner valve stems would be nearly impossible to get to.
The passenger inner is the one that gets the hottest, which is a lead indicator for tire failure. The exhaust runs down the passenger side of the chassis causing more heat on that tire. Got stuck in traffic in Atlanta during the summer and my tire temp rose to over 130f, and I decided it was time for us to take a break... We made lunch and let the tires cool off.
As to what your tire guy said, the outer tire doesn't have an extender, so I am thinking his reasoning might be flawed or he was answering a different question that he thought he heard.
Your cold psi quickly rises once you roll. Cold front tires at 75 quickly get to over 80 and the rears quickly get to over 90 in nominal conditions. What I have begun doing lately (last 10,000 or so) is running the inner duallies a couple pounds less when cold. Once rolling they quickly equalize with the outer tires and has less thermal load than normal.
I have over 30,000 miles with this configuration over the last 18 months.
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__________________
2017 Jayco Redhawk 29XK - SOLD 10/19
2015 Wrangler JKU
2019 Ford F-250
2019 Open Range 310BHS - (a Jayco Division)
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01-24-2017, 03:29 PM
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#9
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Senior Member
Join Date: Feb 2016
Location: Lafayette, LA
Posts: 285
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Quote:
Originally Posted by CarlB
My TST flow through sensors did not work with the valve extenders at all. All wheels have steel valve stems, and the flow through sensors are nearly as long as the extenders. I can reach them with no problem.
Without the flow through sensors, the inner valve stems would be nearly impossible to get to.
The passenger inner is the one that gets the hottest, which is a lead indicator for tire failure. The exhaust runs down the passenger side of the chassis causing more heat on that tire. Got stuck in traffic in Atlanta during the summer and my tire temp rose to over 130f, and I decided it was time for us to take a break... We made lunch and let the tires cool off.
As to what your tire guy said, the outer tire doesn't have an extender, so I am thinking his reasoning might be flawed or he was answering a different question that he thought he heard.
Your cold psi quickly rises once you roll. Cold front tires at 75 quickly get to over 80 and the rears quickly get to over 90 in nominal conditions. What I have begun doing lately (last 10,000 or so) is running the inner duallies a couple pounds less when cold. Once rolling they quickly equalize with the outer tires and has less thermal load than normal.
I have over 30,000 miles with this configuration over the last 18 months.
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Hi Carl ..... All six of my tries on my '16 Greyhawk MV came with a valve extender .....
__________________
Wilson Boudreaux
From Cajun Country
Jayco 2016 Grey Hawk 29MV Champagne
Toad - '16 Subaru Forester (Pearl White - manual transmission)
Blue Ox (everything) for the TOAD
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01-24-2017, 11:03 PM
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#10
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Senior Member
Join Date: Mar 2015
Location: Riverview
Posts: 316
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Quote:
Originally Posted by Boudreaux
Hi Carl ..... All six of my tries on my '16 Greyhawk MV came with a valve extender .....
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That is just plain odd. My 2015 only had one pair of valve extenders. Do you have rubber valve stems? All the valve stems are metal on mine.
If you don't have metal valve stems, you should get them if you are wanting to run the flow through sensors. The non flow through sensors might be good to go with the rubber valve stems.
__________________
________
Carl & Dawn
2015 Greyhawk 31FS (with 4x4 conversion by Ujoint Offroad)
2012 Lincoln MKZ Hybrid (our TOAD on a DEMCO Dolly)
DW, DSx2, DDx2 Catx2 Dog
Tampa Bay Area of FL
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01-25-2017, 10:45 AM
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#11
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Senior Member
Join Date: Feb 2016
Location: Lafayette, LA
Posts: 285
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Quote:
Originally Posted by CarlB
That is just plain odd. My 2015 only had one pair of valve extenders. Do you have rubber valve stems? All the valve stems are metal on mine.
If you don't have metal valve stems, you should get them if you are wanting to run the flow through sensors. The non flow through sensors might be good to go with the rubber valve stems.
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Yes all six tire air valves on my '16 Greyhawk are metal air valves, and yes all six valve have that (about two inch) air valve extender....!!!
__________________
Wilson Boudreaux
From Cajun Country
Jayco 2016 Grey Hawk 29MV Champagne
Toad - '16 Subaru Forester (Pearl White - manual transmission)
Blue Ox (everything) for the TOAD
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01-26-2017, 05:41 AM
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#12
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Senior Member
Join Date: Jul 2016
Location: Atlanta
Posts: 307
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Quote:
Originally Posted by Boudreaux
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I have the same on mine
__________________
2017 Greyhawk 29MV
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01-26-2017, 02:03 PM
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#13
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Senior Member
Join Date: Jun 2010
Location: Saskatoon Sask Canada
Posts: 10,714
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Quote:
Originally Posted by Boudreaux
I asked my tire dealer about removing those tire extenders completely.
He said they are needed because of the high tire pressure (75 lbs front / 80 lbs rear) of the RV tires.
Without the extenders, there is a possibility of tire valve failure.
SO, I left mine on.
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I'd find a new tire dealer... You NEED metal valve stems with tire pressures that high but the valve extenders are there merely for convenience.
__________________
Seann
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 900watts of solar, Lithium batteries (400amp hour), 2000 watt (4000 surge) whole house inverter.
145days boondockinig in2023 2022/151 2021[/COLOR]
93/2020,157/2019219/2018 206/2017,215/2016, 211/2015, 196/14, 247/13, 193/12
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01-26-2017, 02:08 PM
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#14
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Senior Member
Join Date: Feb 2016
Location: Lafayette, LA
Posts: 285
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Quote:
Originally Posted by Seann45
I'd find a new tire dealer... You NEED metal valve stems with tire pressures that high but the valve extenders are there merely for convenience.
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I already have metal tire air valves in addition to those 2" metal extenders. Better safe than sorry.
__________________
Wilson Boudreaux
From Cajun Country
Jayco 2016 Grey Hawk 29MV Champagne
Toad - '16 Subaru Forester (Pearl White - manual transmission)
Blue Ox (everything) for the TOAD
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