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09-14-2015, 01:25 AM
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Join Date: Jan 2015
Location: Redcliffe, Queensland, Australia
Posts: 80
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Front wheel valve stem cap hitting fork
I have fitted the tube supplied in the kit to the front wheel. After installation of the wheel into the front fork I found that the tire would not rotate without the valve stem cap hitting the front fork. Van's replied the solution is to remove the cap. I'm not happy with this solution. Goodyear aviation tire manual states, "Make certain that every valve has a cap to retain inflation and prevent dirt, oil, and moisture from damaging the core."
Does anyone know of a tube that has a shorter valve stem that would allow the tire to be fitted with its cap and thus remain airworthy?
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09-14-2015, 08:14 AM
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Join Date: Feb 2005
Location: Wisconsin
Posts: 612
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I have the same issue and feel the same. Hoping I can
find an ultra low-profile cap or something to replace the
big yellow nut. I know my RV-10 has the same tire
on it, and while they do have clearance issues too, mine wasn't nearly as severe as with this tube. I'm not sure off hand which tube or stem design I use on that one, but certainly that will be getting replaced soon down the line because I'm not going without a cap long-term. There is a lot of rubber
dust and crud that builds up in there.
PS: I also replaced my axle. I'm surprised that they are still sticking with that same design. It's far from optimal. The wheel is a matco wheel, and Matco also makes a much better axle for the front wheel. Check it out, it's not that expensive.
WHLAXLE24 Axle Assembly, A24 1.25 Inch
WHLA24SPKIT
Those are the 2 part numbers you need.
Last edited by TimO : 09-14-2015 at 08:16 AM.
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09-14-2015, 10:12 AM
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Join Date: Mar 2005
Posts: 182
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We fitted a 500 x 5 nose wheel to our 9A and had the same problem. We did find a tyre with a short stem (made for gliders) but it was very expensive.
In the end we drilled a hole for the valve stem to exit through the opposite wheel half - so the valve tube exits the hub on the opposite side - because the valve hole is offset in the rim the amount of valve stem exposed becomes much shorter. Works a treat!
Description (and rather crappy diagrams) here
__________________
Dave Boxall
RV-9A / Wilksch WAM-120 diesel. Flying since April 09
Bath England
=VAF= membership dues paid April 2017
Last edited by Dave_Boxall : 09-18-2015 at 10:16 PM.
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09-14-2015, 04:32 PM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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Tim, if you have the Matco axle the wheel is closer to the fork on one side than the other. Check yours out, you can probably flip the wheel and have plenty of room. You can reverse the axle too, but if you already drilled you'd have an extra hole.
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Actual repeat offender.
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09-14-2015, 04:59 PM
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Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
Posts: 2,408
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Quote:
Originally Posted by aerhed
Tim, if you have the Matco axle the wheel is closer to the fork on one side than the other. Check yours out, you can probably flip the wheel and have plenty of room. You can reverse the axle too, but if you already drilled you'd have an extra hole.
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I was wandering why I had clearance on the RV-10 but not on the RV-14. I'm having trouble with the nose fork and have not done any drilling. I'll have to check your method and see if I can get enough clearance with the cap on like I had with the 10.
Thanks
__________________
Thanks Ron
RV-10 SOLD
RV-14 Flying
AirCam flying
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09-15-2015, 11:40 PM
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Join Date: Apr 2005
Location: Newnan, GA
Posts: 54
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Link...
Tim Olson, -10 builder, has a website, the link is on the mothership page. On it is a list of 'must fixes' for the -10. I'm not there yet (or even close) but one of the items he mentions is the valve stem clearance. Might be worth taking a look. Good luck!
2015 dues GLADLY paid!
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09-16-2015, 07:55 AM
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Join Date: Feb 2005
Location: Wisconsin
Posts: 612
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Aerhed, thanks for the reminder about flipping the axle. I will do that. I drilled the anti-rotation hole on the wrong side so just did the install witht he stem opposite too. I'll just drill the other side the same and flip the axle. That should take care of it. I think you're right, I do remember that it was different per-side, and on the RV-10 that does fix the issue.
One more reason to consider that axle...since it may give the opportunity to fix the stem nut clearance.
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09-16-2015, 09:18 AM
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Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
Posts: 2,408
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Measured mine last evening. The cap sticks out about a 1/16" now and by rotating the axle you gain just over a 1/16". It may clear but that's all on mine. Sure worth a try. Thanks for the tip.
__________________
Thanks Ron
RV-10 SOLD
RV-14 Flying
AirCam flying
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09-16-2015, 11:51 AM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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Ron, which wheel do you have? I got rid of the rubber seals on this last one, so I may have a hair more clearance.
__________________
Actual repeat offender.
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09-16-2015, 01:48 PM
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Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
Posts: 2,408
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I have the 5.00 X5 that Van's sent with the kit and the Matco axle. I'm still using the yellow cap that came with the supplied tube.
__________________
Thanks Ron
RV-10 SOLD
RV-14 Flying
AirCam flying
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