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sarg314(at)gmail.com
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 Posted: Wed May 12, 2010 8:54 am Post subject: Interference problem with Matco WHLAXLE24 kit |
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I tried installing the WHLAXLE24 on my 6A last night. It's a good idea, but seems to be incompatible with the old style nose wheel fairing. My kit is from around 2000.
My wheel fairing has the old, bad, design where the big AN6 bolt that holds on the wheel ALSO holds on the wheel fairing. Matco has you install a 1/4-20 hex head bolt through the fork that screws into a threaded hole in the axle. This is to keep it from rotating within the fork. (You can see the drawings on the Matco website. )
http://www.matcomfg.com/AXLEASSEMBLYA24125INCH-idv-3657-1.html
 The hex head of that anti-rotation bolt is interfering with the mounting bracket of the wheel fairing. I called Matco who said I was the first to report this problem and was otherwise unsympathetic. I advised them to warn about this on the drawing, but his attitude was "hey, that's home building". I should have been on the look out for things like this, but it is sold specifically for RV forks and I assumed they had engineered it better than that.
There are several ways to deal with this.
1- Leave out the 1/4-20 bolt entirely. The friction of the fork griping the axle with the full torque on a AN-6 bolt will almost certainly keep it from rotating.
2- Use a countersunk 1/4-20 screw instead of the bolt. I don't like this because it requires excavating yet more aluminum from my already slim, new style, fork assembly. It is pretty close to the lightening hole as it is.
3- If I knew about this ahead of time, I could have drilled a hole for a #8 screw instead, thru the fork into the periphery of the axle and then tapped that for an 8-32. That would not have interfered. Why they chose a 1/4-20 bolt for that purpose is a mystery to me.
 It is way overkill.
4- Try using a 1/4-20 round head screw instead of a hex head bolt. The smaller head may be small enough to miss the bracket or be usable with just a little bit of grinding on the bracket.
I will try #4 and if that doesn't work, I'll go with #1.
--
Tom Sargent, RV-6A, almost ready to weigh.
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Dale Ensing
Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC
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| Posted: Wed May 12, 2010 9:25 am Post subject: Interference problem with Matco WHLAXLE24 kit |
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Tom,
How about a 1/4-20 set screw with the internal hex socket? Get one short/long enough so that it doesn't protrude and interfere with the fairing bracket when tight in the axle.
Dale Ensing
[quote] ---
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Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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sarg314(at)gmail.com
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| Posted: Wed May 12, 2010 10:00 am Post subject: Interference problem with Matco WHLAXLE24 kit |
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Dale:
A set screw isn't appropriate here because the screw doesn't just press on the Matco axle. They drilled and tapped a hole for a 1/4-20 all the way through the (expanded head of) the axle. So you have to use something with a head on it AND because of the geometry of the axle, the head has to be on the outside of the fork.
On Wed, May 12, 2010 at 10:22 AM, Dale Ensing <densing(at)carolina.rr.com (densing(at)carolina.rr.com)> wrote:
| Quote: | Tom,
How about a 1/4-20 set screw with the internal hex socket? Get one short/long enough so that it doesn't protrude and interfere with the fairing bracket when tight in the axle.
Dale Ensing
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--
Tom Sargent
[quote][b]
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Dale Ensing
Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC
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| Posted: Wed May 12, 2010 12:24 pm Post subject: Interference problem with Matco WHLAXLE24 kit |
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I understand.....would it be possible to put a short set screw (with Loctite) in the back side of the axle flange to create a blind hole and they tighten the functioning set screw against it? Just a thought.......
Dale
[quote] ---
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Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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sarg314(at)gmail.com
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| Posted: Wed May 12, 2010 12:34 pm Post subject: Interference problem with Matco WHLAXLE24 kit |
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Dale:
Yes, locktite on a set screw might be a good thing here. One of the guys I work with suggested that.
On Wed, May 12, 2010 at 1:23 PM, Dale Ensing <densing(at)carolina.rr.com (densing(at)carolina.rr.com)> wrote:
[quote] I understand.....would it be possible to put a short set screw (with Loctite)Â in the back side of the axle flange to create a blind hole and they tighten the functioning set screw against it? Just a thought.......
Dale
[quote] ---
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craigtxtx(at)yahoo.com
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| Posted: Wed May 12, 2010 2:35 pm Post subject: Interference problem with Matco WHLAXLE24 kit |
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Tom,
I did something like your option #4. I used the bolt provided and carved on the nosewheel bracket enough to clear the bolt head. Not elegant, but seems to work.
Craig Gallenbach
RV8A N184CG 115hrs
--- On Wed, 5/12/10, thomas sargent <sarg314(at)gmail.com> wrote:
| Quote: |
From: thomas sargent <sarg314(at)gmail.com>
Subject: Interference problem with Matco WHLAXLE24 kit
To: "rv-list" <rv-list(at)matronics.com>
Date: Wednesday, May 12, 2010, 12:08 PM
I tried installing the WHLAXLE24 on my 6A last night. It's a good idea, but seems to be incompatible with the old style nose wheel fairing. My kit is from around 2000.
My wheel fairing has the old, bad, design where the big AN6 bolt that holds on the wheel ALSO holds on the wheel fairing. Matco has you install a 1/4-20 hex head bolt through the fork that screws into a threaded hole in the axle. This is to keep it from rotating within the fork. (You can see the drawings on the Matco website. )
http://www.matcomfg.com/AXLEASSEMBLYA24125INCH-idv-3657-1.html
The hex head of that anti-rotation bolt is interfering with the mounting bracket of the wheel fairing. I called Matco who said I was the first to report this problem and was otherwise unsympathetic. I advised them to warn about this on the drawing, but his attitude was "hey, that's home building". I should have been on the look out for things like this, but it is sold specifically for RV forks and I assumed they had engineered it better than that.
There are several ways to deal with this.
1- Leave out the 1/4-20 bolt entirely. The friction of the fork griping the axle with the full torque on a AN-6 bolt will almost certainly keep it from rotating.
2- Use a countersunk 1/4-20 screw instead of the bolt. I don't like this because it requires excavating yet more aluminum from my already slim, new style, fork assembly. It is pretty close to the lightening hole as it is.
3- If I knew about this ahead of time, I could have drilled a hole for a #8 screw instead, thru the fork into the periphery of the axle and then tapped that for an 8-32. That would not have interfered. Why they chose a 1/4-20 bolt for that purpose is a mystery to me.
It is way overkill.
4- Try using a 1/4-20 round head screw instead of a hex head bolt. The smaller head may be small enough to miss the bracket or be usable with just a little bit of grinding on the bracket.
I will try #4 and if that doesn't work, I'll go with #1.
--
Tom Sargent, RV-6A, almost ready to weigh.
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av8er2fly(at)peoplepc.com
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| Posted: Wed May 12, 2010 7:03 pm Post subject: Interference problem with Matco WHLAXLE24 kit |
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I just installed mine last weekend, and because of the lightning hole I rotated the bolt to get more surfice area around the bolt. When I put the fairing on I could see that it was going to slightly interfere so I gound out a small portion of the bracket and I'm going to keep a good eye on it.
[quote] ---
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