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06-11-2012, 04:13 PM
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Join Date: Jul 2007
Location: Molalla, Oregon
Posts: 955
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Main Wheels - Valve stem crooked
I've been putting my tubes, tires, and wheels together. The documentation for this task is really weak. I'm still trying to figure out how the brake calipers are held on. But meanwhile, the valve stem sticking out of the wheel is crooked. Is this a common problem? How do I fix it?
Here's what the tube looks like. The instructions tell you to remove the washer and nut at the base of the tube, next to the rubber, and discard them. I did it both ways, and mounted the tire on the wheel and inflated it, and it didn't make any difference. It's still crooked, either way.
Here's the inflated tire on the wheel. Is this normal? This just seems unacceptable to me. But I'm afraid to start bending things before checking with those more knowledgeable.
Do I modify this? If so, how is it best done? Thanks in advance for help and comments.
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06-11-2012, 04:18 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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Good to go, that's the way it is.
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Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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06-11-2012, 06:51 PM
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Join Date: Jan 2005
Location: Hopkinsville, KY
Posts: 957
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They use to make the stems different and they stuck straight out like they should, they have changed the design and now they bend over and touch the edge of the rim when you inflate them. I use to have a picture of both but can't find them. this drawing shows the difference.

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Bobby Hester - Builder/Pilot/A&P
Surfing the web from Hopkinsville, KY
N857BH RV7A XP-O360 - Garmin G3X ADS-B IN/OUT 2020 Compliant
Web site: http://www.newtech.com/bobbyhester/RVSite.htm
Dec. 2019 VAF donator - alot better than any magazine subscription
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06-11-2012, 06:59 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Are they new Aero Classic Leakguard tubes? My new ones did the same thing with Cleveland wheels....
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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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06-11-2012, 08:12 PM
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Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 3,156
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I agree, it sure sucks. Par.
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Scott Card
CQ Headset by Card Machine Works
CMW E-Lift
RV-9A N4822C flying 2200+hrs. / Cedar Park, TX
RV8 Building - fuselage / showplanes canopy (Done!)
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06-11-2012, 09:21 PM
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Join Date: Jan 2005
Location: Cincinnati, OH
Posts: 1,558
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I have new air stop tubes and they do the same thing. I think they are all like that now. I put a nut and washer on the inside it try to 're-align' it a little and it helped. No leaks after 200+ hours. They don't fit the rims like they should though.
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SH
RV6/2001 built/sold 2005
RV8 Fastback/2008 built/sold 2015
RV4/bought 2016/sold/2017
RV8/2018 built/Sold(sadly)
RV4/bought 2019 Flying
Cincinnati, OH/KHAO
JAN2020
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06-12-2012, 12:22 AM
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Join Date: Jan 2008
Location: KTCY
Posts: 643
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We had one that was reeeealy bad. Vans sent us a new one...
Now both look like yours.
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Dave & Trina
RV-9A Flying  - 330 Hrs. Painted  Finishing the interior.
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06-12-2012, 05:24 AM
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Join Date: Jul 2007
Location: Molalla, Oregon
Posts: 955
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Gentlemen, thank you for these responses! I've learned some things. Wow. I'm quite surprised, actually. However, I'll leave it as is and build on. I don't like the way it looks, but it sounds like there are no worries.
Gil, yes. These are the Aero Classic Leakguard tubes, came in the kit. Made in Mexico! Interesting that the Aero Classic tires are made here in the U.S.A., though.
Even though Vans says I should remove and discard the nut and washer at the base of the valve stem, Matco says to leave them on. So what do you do? I'm going to leave them on. They make this stuff, after all, and perhaps Vans hasn't updated the manual since switching over from Cleveland. ??? Anyway, thanks again!
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06-12-2012, 07:04 AM
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Join Date: Jul 2010
Location: Novi, MI & Venice, FL
Posts: 66
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Did you use tire talc on the tube? After that, inflate the tube in the tire just a bit to seat it, but leave the valve out of the stem. Then you can maneuver the tube a little to get things aligned. Re-insert the valve in the stem and inflate.
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06-12-2012, 10:19 AM
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Join Date: Jan 2005
Location: Roy, Utah
Posts: 1,144
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Isn't there supposed to be a grommet in the wheel where the valve stem pokes through?
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Five Sierra Fox
RV-9A
Utah
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