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Main gear weldment too small

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Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Sun Jun 19, 2011 8:28 pm Post subject: Main gear weldment too small

Anyone seen a main gear socket smaller than the end of the gear legs? 

Fortunately not mine, but a fellow builder on the field. I measure his 

sockets at 0.02 smaller than the end of his gear legs. His gear legs 

measure the same as mine, but my gear sockets opening is about 0.03 

bigger than his. Haven't come up with any ideas other than a brake 

cylinder hone to enlarge the opening. It is on an old Manila QB 

fuselage. Mine is new facility QB fuselage.

Kelly

--

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

Lew Gallagher

Joined: 04 Jan 2008
Posts: 402
Location: Greenville , SC

Posted: Sun Jun 19, 2011 9:13 pm Post subject: Main gear weldment too small

Hey Kelly,



We didn't measure it, but it was definitely too tight a fit.  Had to clean 

all the preservative off the legs and lightly sand them to get them to fit. 

And then it was a struggle.  A brake cylinder hone should work as well.



Later, - Lew

---

_________________
non-pilot
crazy about building
NOW OFICIALLY BUILDER #40549
Fly off completed !

philperry9(at)gmail.com
Guest

Posted: Mon Jun 20, 2011 9:49 am Post subject: Main gear weldment too small

Mine was smooth as a baby's bottom.



I polished the inside of the mounts and the gear legs with scotchbrite.  Then lubed them with some airframe grease.  They slid right in without any issue at all.



Phil

 

On Mon, Jun 20, 2011 at 12:09 AM, Lew Gallagher <lewgall(at)charter.net (lewgall(at)charter.net)> wrote:

[quote] --> RV10-List message posted by: "Lew Gallagher" <lewgall(at)charter.net (lewgall(at)charter.net)>

 

 Hey Kelly,

 

 We didn't measure it, but it was definitely too tight a fit.  Had to clean all the preservative off the legs and lightly sand them to get them to fit. And then it was a struggle.  A brake cylinder hone should work as well.

  

 Later, - Lew

 

 

 ---

Tim Olson

Joined: 25 Jan 2007
Posts: 2878

Posted: Mon Jun 20, 2011 2:10 pm Post subject: Main gear weldment too small

I had one that I had to scotchbrite up to get to

fit, and one that after putting it in, had a little

too much slop.  Too much slop can cause rocking,

clicking, and bolt wear.  In my case, a little

rotational movement too, that caused the tire to

slightly to in and out when you moved it.  I ended

up putting in some filler to fill the gap slightly,

and that fixed it all.



So, the weldment's aren't perfect.

Tim Olson - RV-10 N104CD

do not archive

On 6/20/2011 12:44 PM, Phillip Perry wrote:

[quote] Mine was smooth as a baby's bottom.



 I polished the inside of the mounts and the gear legs with scotchbrite.

 Then lubed them with some airframe grease.  They slid right in without

 any issue at all.



 Phil



 On Mon, Jun 20, 2011 at 12:09 AM, Lew Gallagher <lewgall(at)charter.net

 <mailto:lewgall(at)charter.net>> wrote:



     

     <lewgall(at)charter.net <mailto:lewgall(at)charter.net>>



     Hey Kelly,



     We didn't measure it, but it was definitely too tight a fit.  Had to

     clean all the preservative off the legs and lightly sand them to get

     them to fit. And then it was a struggle.  A brake cylinder hone

     should work as well.



     Later, - Lew

     ---

roxianmike(at)msn.com
Guest

Posted: Mon Jun 20, 2011 4:54 pm Post subject: Main gear weldment too small

My situation is beyond polishing, or for what I did yesterday, wearing out a drill trying to hone them out.  The ID is more than  .003 smaller than the leg OD. Talked to Vans today and they are thinking the housing may have not been honed appropriately at the factory.......the legs OD are the correct size.  They are going to talk about it and we will visit tomorrow but I suspect my only option will be to pull them out and put new ones in.

[quote] Date: Mon, 20 Jun 2011 17:07:42 -0500

 From: Tim(at)MyRV10.com

 To: rv10-list(at)matronics.com

 Subject: Re: Main gear weldment too small

 --> RV10-List message posted by: Tim Olson <Tim(at)myrv10.com>

 I had one that I had to scotchbrite up to get to

 fit, and one that after putting it in, had a little

 too much slop.  Too much slop can cause rocking,

 clicking, and bolt wear.  In my case, a little

 rotational movement too, that caused the tire to

 slightly to in and out when you moved it.  I ended

 up putting in some filler to fill the gap slightly,

 and that fixed it all.

 So, the weldment's aren't perfect.

 Tim Olson - RV-10 N104CD

 do not archive

 On 6/20/2011 12:44 PM, Phillip Perry wrote:

 > Mine was smooth as a baby's bottom.

 >

 > I polished the inside of the mounts and the gear legs with scotchbrite.

 > Then lubed them with some airframe grease.  They slid right in without

 > any issue at all.

 >

 > Phil

 >

 > On Mon, Jun 20, 2011 at 12:09 AM, Lew Gallagher <lewgall(at)charter.net

 > <mailto:lewgall(at)charter.net>> wrote:

 >

 >     --> RV10-List message posted by: "Lew Gallagher"

 >     <lewgall(at)charter.net <mailto:lewgall(at)charter.net>>

 >

 >     Hey Kelly,

 >

 >     We didn't measure it, but it was definitely too tight a fit.  Had to

 >     clean all the preservative off the legs and lightly sand them to get

 >     them to fit. And then it was a struggle.  A brake cylinder hone

 >     should work as well.

 >

 >     Later, - Lew

 >

 >

 >     ---

Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Mon Jun 20, 2011 6:08 pm Post subject: Main gear weldment too small

I don't believe the gear mounts are shared with any other RV model, since the part number is WD-1021, so don't see how it could be a mix up. The explanation of not finish machined at factory seems most probable....some quality control.

 

On Mon, Jun 20, 2011 at 6:14 PM, Robin Marks <robin(at)painttheweb.com (robin(at)painttheweb.com)> wrote:

 	  Quote: 	
		   Just jumping into the conversation with an observation. After much head scratching we discovered Vans shipped us a pair of 9A legs for our 8A. No way to correct that situation except replacing for the correct units. I was actually shocked to discover that the 7A, 8A, 9A main legs are each different units with their own unique geometry/dimensions. Very un-Vans like. through the RV list I heard from two others with the exact same parts error.   Are you sure you have the correct parts? It has happened before...

BTW the plane rolls a lot better with the correct gear legs.

Robin

 On Mon, Jun 20, 2011 at 8:51 PM, Roxanne and Mike Lefever <roxianmike(at)msn.com (roxianmike(at)msn.com)> wrote:

 



 	  Quote: 	
		      

 My situation is beyond polishing, or for what I did yesterday, wearing out a drill trying to hone them out.  The ID is more than  .003 smaller than the leg OD. Talked to Vans today and they are thinking the housing may have not been honed appropriately at the factory.......the legs OD are the correct size.  They are going to talk about it and we will visit tomorrow but I suspect my only option will be to pull them out and put new ones in.

   

 



	


	




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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

woxofswa

Joined: 12 Aug 2008
Posts: 349
Location: AZ

Posted: Mon Jun 20, 2011 10:26 pm Post subject: Re: Main gear weldment too small

Put mine in today with very little trouble. Much easier than I anticipated actually.  I did find that the hole in the leg top was slightly smaller than the specified drill bit so I predrilled it on the drill press first. That made it much easier to final drill the receiver.

_________________
Myron Nelson
Mesa, AZ
Flew May 10 2014

roxianmike(at)msn.com
Guest

Posted: Wed Jun 22, 2011 5:57 pm Post subject: Main gear weldment too small

 

I just posted on VAF that last night after another 6 hours of grinding, sanding etc. I was able to insert my gear legs.............after some discussion with Vans, I really could never determine wether the housing had not been completly honed as appropriate or the many years my kit had been sitting had contributed significantly to the problem.....................considering Vans has not had many of these issues and we have not seen it on Matronics or VAF as an issue I think the years of the corrosion were more the problem than the design or product quality................so its fixed and my baby stood on her own last night for the first time!!

 

Of course we had heat health warnings here yesterday and I awoke this morning wondering if I had hallucinated about getting the gear on at 11pm last night so on my way to the office I drove by the hangar to verify I was remembering the prior evening accurately and sure enough, there she stood!

 

 	  Quote: 	
		   Subject: Re: Main gear weldment too small

 From: woxof(at)aol.com

 Date: Mon, 20 Jun 2011 23:26:14 -0700

 To: rv10-list(at)matronics.com

 

 --> RV10-List message posted by: "woxofswa" <woxof(at)aol.com>

 

 Put mine in today with very little trouble. Much easier than I anticipated actually.  I did find that the hole in the leg top was slightly smaller than the specified drill bit so I predrilled it on the drill press first. That made it much easier to final drill the receiver.

 

 --------

 Myron Nelson

 Mesa, AZ

 Emp completed, QB wings completed, legacy build fuse in mostly done, finishing kit in progress.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=343620#343620

 

 

&gt========================
	


 	  Quote: 	
		   

 

 


	


 		 	   		  

  [quote][b]

AV8ORJWC

Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"

Posted: Wed Jun 22, 2011 6:54 pm Post subject: Main gear weldment too small

Myron, any ideas on the best routing on "WN" to get from the west coast to OSH '11?  Last year was PDX-LAS-MKE. Return was MDW-RNO-PDX after 32 cancellations thru MDW. Would love to thank you for Copperstate Barbeques of the past (08/09/10) and discuss that gear weldment issue.

 

YES, I will provide cold beer to Camp Swampy even without Gary and Bob+ wives.

 

John Cox

 

 

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Roxanne and Mike Lefever

Sent: Wednesday, June 22, 2011 6:55 PM

To: rv10-list(at)matronics.com

Subject: RE: Re: Main gear weldment too small

 

 

I just posted on VAF that last night after another 6 hours of grinding, sanding etc. I was able to insert my gear legs..............after some discussion with Vans, I really could never determine wether the housing had not been completly honed as appropriate or the many years my kit had been sitting had contributed significantly to the problem.....................considering Vans has not had many of these issues and we have not seen it on Matronics or VAF as an issue I think the years of the corrosion were more the problem than the design or product quality................so its fixed and my baby stood on her own last night for the first time!!

 

Of course we had heat health warnings here yesterday and I awoke this morning wondering if I had hallucinated about getting the gear on at 11pm last night so on my way to the office I drove by the hangar to verify I was remembering the prior evening accurately and sure enough, there she stood!

 

 	  Quote: 	
		   Subject: Re: Main gear weldment too small

 From: woxof(at)aol.com

 Date: Mon, 20 Jun 2011 23:26:14 -0700

 To: rv10-list(at)matronics.com

 

 --> RV10-List message posted by: "woxofswa" <woxof(at)aol.com>

 

 Put mine in today with very little trouble. Much easier than I anticipated actually. I did find that the hole in the leg top was slightly smaller than the specified drill bit so I predrilled it on the drill press first. That made it much easier to final drill the receiver.

 

 --------

 Myron Nelson

 Mesa, AZ

 Emp completed, QB wings completed, legacy build fuse in mostly done, finishing kit in progress.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=343620#343620

 

 

========================

 

 

 


	


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woxofswa

Joined: 12 Aug 2008
Posts: 349
Location: AZ

Posted: Thu Jun 23, 2011 10:50 pm Post subject: Re: Main gear weldment too small

John,



We're not huge in MKE yet until the Airtran thing gets melded. I think going through LAS like you did last year is the best bet for us. 



Thanks for the kind words for the Cstate nest. Looking forward to a great turnout this year. 



Btw, knock on wood, but I didn't have any issues (yet) with the gear.  Got her up proud on her feet and then realized how much easier some remaining composite work would be with her back on the dolly and took the legs back off for a while. 



Cheers,

_________________
Myron Nelson
Mesa, AZ
Flew May 10 2014

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