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05-01-2013, 08:20 AM
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#1
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Winnebago Owner
Join Date: Feb 2013
Location: Delray Beach, FL
Posts: 65
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Tire Valve Stem Extentions
I have a new 2013 Itasca Sunstar 30T that has been amazingly problem free so far in its first month & three trips, but I can't seem to find a good solution to adding air to the tires.
It came with a long flexible tube valve extention on one of the rear tires & a short rigid extender on the other. I cannot find a way to fill all 6 tires with a single air chuck. Because of the pressure (110 lbs) & the time it takes with a 150 LB air compressor, I need to use a lock-on air chuck but I can't get it to work on all but the two tires with the flexible tube extender without removing the hub caps to get to the stems. The dealer gave me 90 degree rigid extenders to use but they are too long to fit through the holes in the hub caps.
It seems like all 6 tires should be set up so I can easily use the same lock-on chuck to easily fill all 6 tires.
What are others doing?
Thanks,
Cass Sumrall
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05-01-2013, 10:10 AM
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#2
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Winnebago Master
Join Date: Jun 2003
Location: Palisade CO
Posts: 895
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Quote:
Originally Posted by Cass Sumrall
I have a new 2013 Itasca Sunstar 30T that has been amazingly problem free so far in its first month & three trips, but I can't seem to find a good solution to adding air to the tires.
It came with a long flexible tube valve extention on one of the rear tires & a short rigid extender on the other. I cannot find a way to fill all 6 tires with a single air chuck. Because of the pressure (110 lbs) & the time it takes with a 150 LB air compressor, I need to use a lock-on air chuck but I can't get it to work on all but the two tires with the flexible tube extender without removing the hub caps to get to the stems. The dealer gave me 90 degree rigid extenders to use but they are too long to fit through the holes in the hub caps.
It seems like all 6 tires should be set up so I can easily use the same lock-on chuck to easily fill all 6 tires.
What are others doing?
Thanks,
Cass Sumrall
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I bought DuallyValve rigid stems that are long enough to use a lock on chuck, They come with a rubber stabilizer that fits in the wheel hand hole
See HERE
I had them installed when I put new tires on at seven years. I wish I had done it years earlier.
__________________
Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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05-01-2013, 11:06 AM
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#3
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Winnebago Owner
Join Date: Apr 2011
Location: Federal Way, Wa.
Posts: 97
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I reccommend Dually Valves as well.
Expedition Exchange Incorporated :: Wheels & Tires :: Alligator Double Seal Valve Cap (V2B)
I added Alligator valve caps as well which makes filling and checking tires a breeze. You can fill and check your tire w/o removing them. The Alligator brand is solid and reliable.
__________________
I do all my own stunts
03 Dolphin LX 6355, Workhorse W22, 8.1 vortec, 04 CR-V, Blue Ox, Brake Pro----Norm, Barb and
Doc(He's a PhD)
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05-01-2013, 11:16 AM
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#4
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Winnebago Watcher
Join Date: Dec 2010
Location: Ocala, FL
Posts: 4
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Why are you running 110# in your tires. Have you had your rig weighed? I only run about 75# in my Fiesta as it weighs 15000# ready to roll. Is 110# the pressure on the side of the tire? If it is, that's the maximum pressure for the maximum load that the tire is rated to carry.
__________________
2002 Fleetwood Fiesta 31H--F53, 2002 Toyota Tacoma Xtra cab.
2 cats: "Rusty"--male, 26 lb, 10 year old red mackerel tabby with white DSH, & "Penny"--female, 14 lb, 10 year old black and white DLH.
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05-01-2013, 11:20 AM
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#5
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Winnebago Master
Join Date: May 2011
Location: Vancouver, WA
Posts: 560
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Quote:
Originally Posted by wackymac
Is 110# the pressure on the side of the tire? If it is, that's the maximum pressure for the maximum load that the tire is rated to carry.
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Actually it's the MINIMUM cold pressure required to support the maximum weight rating of the tire.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Lifetime GS Member, SKP, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '14 CR-V
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05-01-2013, 11:25 AM
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#6
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Winnebago Owner
Join Date: Jun 2012
Location: BC
Posts: 77
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Quote:
Originally Posted by wackymac
Why are you running 110# in your tires. Have you had your rig weighed? I only run about 75# in my Fiesta as it weighs 15000# ready to roll. Is 110# the pressure on the side of the tire? If it is, that's the maximum pressure for the maximum load that the tire is rated to carry.
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X2, I run 100 in the rear & 105 in the front and I weigh 36K plus. 110# sounds like high to me but suggest you get your rig weighed and inflate to the tire mfg. ratting based on actual loaded weight.
__________________
Dennis & Carol
2003, 4006, 41' DutchStar, [SIGPIC][/SIGPIC] Spartan, ISC 8.3L W/BanksPower - 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake. And the 04 Bird, Sunshine Car.
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05-01-2013, 11:34 AM
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#7
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Registered User
Join Date: Sep 2007
Location: REGINA
Posts: 15
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Quote:
Originally Posted by Clay L
I bought DuallyValve rigid stems that are long enough to use a lock on chuck, They come with a rubber stabilizer that fits in the wheel hand hole
See HERE
I had them installed when I put new tires on at seven years. I wish I had done it years earlier.
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I have those on my 22.5 duals and they are AWESOME. With the black rubber support plug you can hardly notice they are actually there.
On the outside dual I replaced the long valve stem with stubbies so the wheels are easier for buffing/polishing around the valve stem area.
Very easy and FAST for pressure checking.
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05-01-2013, 11:46 AM
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#8
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Winnebago Owner
Join Date: Feb 2013
Location: Delray Beach, FL
Posts: 65
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Does the DuallyValve attach to the existing stem or do the tires have to be removed to install them?
I am experimenting with tire pressure. I picked it up from the dealer with 90 all around, but the dealer said it would handle better with 110 & it does so far. 110 is the minimum pressure at max weight as stated on the tires. I have not had it weighed but my calculations tell me I am probably about 500 lbs under max.
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05-01-2013, 11:46 AM
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#9
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Winnebago Owner
Join Date: Jun 2012
Posts: 123
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I inflate my tires to what the decal inside the motorhome next to the drivers says to run: which is 105 front, 100 rear. I didn't even look at what the sidewall says since the tire is manufactured for many different types of vehicles.
__________________
2008 Newmar Dutchstar 4023, 425hp Cummins ISL
SOLD: 2005 Winnebago Journey 39K, 350HP C-7 Cat
Toad: Flat deck car trailer hauling a 1932 ford tudor sedan
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05-01-2013, 11:51 AM
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#10
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Registered User
Join Date: Sep 2007
Location: REGINA
Posts: 15
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Quote:
Originally Posted by Cass Sumrall
Does the DuallyValve attach to the existing stem or do the tires have to be removed to install them?
I am experimenting with tire pressure. I picked it up from the dealer with 90 all around, but the dealer said it would handle better with 110 & it does so far. 110 is the minimum pressure at max weight as stated on the tires. I have not had it weighed but my calculations tell me I am probably about 500 lbs under max.
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I know mine are straight and screw on to the existing stem. There is an actuator rod inside to press on the valve core when checking and filling.
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05-01-2013, 12:21 PM
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#11
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Winnebago Watcher
Join Date: Jul 2012
Location: SoCal
Posts: 4
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During our second Freightliner service the oval rubber inserts to support the inner dual valve stems were found. They had been somehow stuffed between the aluminum wheels and had survived over 11,000 miles before being properly installed!
__________________
Fred & Mary RVM135
2012 Dutch Star 3735 ISL 400
2012 GMC Sierra Ext Cab 4x4
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05-01-2013, 02:08 PM
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#12
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Winnebago Master
Join Date: Aug 2008
Location: Texas
Posts: 1,665
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Quote:
Originally Posted by Mr_D
Actually it's the MINIMUM cold pressure required to support the maximum weight rating of the tire.
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Actually it is the "Maximum Cold Inflation" and load rating on the side of the tires.
Chart
So if the Max Cold Inflation is 110PSI, the load for that pressure is stamped on the tire. Inflating past that pressure void warranties and is dangerous. Inflating less than that is okay as long as you do not go past the manufacturer's lowest pressure rating for the load.
Choice of wording I guess!
__________________
Wayne MSGT USMC (Ret) & Earlene (CinCHouse)
2015 Winnebago Tour 42QD - 2020 Lincoln Nautilus Reserve (TOAD)
(RVM-14) It is what it is, and then it is what you make of it.
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05-01-2013, 03:17 PM
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#13
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Winnebago Owner
Join Date: Oct 2009
Location: Warner Robins, GA
Posts: 51
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Quote:
Originally Posted by Cass Sumrall
Does the DuallyValve attach to the existing stem or do the tires have to be removed to install them?
I am experimenting with tire pressure. I picked it up from the dealer with 90 all around, but the dealer said it would handle better with 110 & it does so far. 110 is the minimum pressure at max weight as stated on the tires. I have not had it weighed but my calculations tell me I am probably about 500 lbs under max.
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The dually valve stems replace the OEM valve stems so the tire has to be removed to install them.
Dually valve stems with the alligator caps as stated above make it easy to check your tire pressure and add/deflate if needed.
Jon
__________________
Jon & Sue Francis (Retired U.S.A.F.)
Lil Girl-Rescued, Abby Rescued, Peaches Rescued
06 Allegro 35TSA Workhorse Chassis
2013 Chevy Spark Dinghy
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05-01-2013, 03:52 PM
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#14
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Winnebago Owner
Join Date: Feb 2013
Location: Delray Beach, FL
Posts: 65
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The Dually system sounds like the way to go but I think I'll wait for a tire change since it sounds like the tires have to be pulled to install them & the coach is new. I can do the fronts easily with the Alligator extenders & its pretty easy to pull the hubcaps for the rears & then they are easy as well with my lock-on air chuck.
I wish I could get a better handle on tire pressure but opinions seem to vary widely. The dealer says anything from the 82 PSI on the plackard by the drivers seat to the 110 max on the tires will be fine - its just a matter of experimenting with the ride at different pressures. I do prefer the stiffer feel at 110 PSI so far to the softer feel at 90 PSI.
Maybe I will hear from someone with the same coach eventually & gain from their experience.
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05-01-2013, 11:22 PM
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#15
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Winnebago Owner
Join Date: Feb 2005
Location: Anderson, IN
Posts: 141
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It's important to know the actual, loaded weight of your motor home. Weighing four corners is best so that any big discrepencies side to side and front to rear can be revealed. If that is not feasible then weighing front, rear, and total at a truck scale can be useful as well. The manufacturer's web site can then be used to find the recommended pressure. My 22,000 lb coach had 90 psi front and 85 psi rear on the tag. This number is a factory best guess that can't take into account how a coach is actually loaded. After four corner weights were known I now have 80 psi all around. I do run 5 psi more in front for a little extra leeway. The coach rides much better at the reduced pressure.
Good luck,
Dave
__________________
2004 37B Adventurer, 8.1 WH, Ultrapower, DIY CAI, Henderson Track Bar, Tru Center, Koni FSD's, Roadmaster Even Brake, Scan Guage II, 180 Thermostat,
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05-02-2013, 01:24 AM
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#16
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Winnebago Owner
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 227
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I have the flexible stainless steel ones from each rear tire. They terminate near the center hub on brackets.. Some say they eventually will leak, but Mine were put on tight and have never leaked.
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05-02-2013, 03:20 PM
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#17
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Winnebago Owner
Join Date: Oct 2012
Location: Le Claire, Iowa
Posts: 169
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Mine came with the inter dual flex extention, only. I ordered Roadmaster extensions for the fronts, and the outer duals. Roadmasters are rigid and I have no problem with leakage. They are easy to fill as well.
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05-02-2013, 03:32 PM
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#18
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Winnebago Master
Join Date: May 2011
Location: Vancouver, WA
Posts: 560
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Quote:
Originally Posted by Deucenut
I inflate my tires to what the decal inside the motorhome next to the drivers says to run: which is 105 front, 100 rear. I didn't even look at what the sidewall says since the tire is manufactured for many different types of vehicles.
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That "decal" is only good if you have the exact same tires as the rig shipped with and then ONLY if you're loaded to the RV's GVWR on each tire, otherwise it's wrong.
Weigh the rig four "corners", use the weight/inflation charts for your exact tire. Take the highest weight on the axle and use that weight to find the minimum pressure you can run on all tires on that axle.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Lifetime GS Member, SKP, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '14 CR-V
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05-02-2013, 10:55 PM
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#19
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Winnebago Owner
Join Date: Jun 2012
Posts: 123
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Quote:
Originally Posted by Mr_D
That "decal" is only good if you have the exact same tires as the rig shipped with and then ONLY if you're loaded to the RV's GVWR on each tire, otherwise it's wrong.
Weigh the rig four "corners", use the weight/inflation charts for your exact tire. Take the highest weight on the axle and use that weight to find the minimum pressure you can run on all tires on that axle.
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Interesting you should suggest that because when I checked the pressure, all the tires were 6 lbs below what I put in them. I just figured they all leaked down the same but maybe the previous owner set the pressure at that.
__________________
2008 Newmar Dutchstar 4023, 425hp Cummins ISL
SOLD: 2005 Winnebago Journey 39K, 350HP C-7 Cat
Toad: Flat deck car trailer hauling a 1932 ford tudor sedan
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