Re: SV: [fairchildclub] Re: Landing gear bushings

Tom Mueller · Post by **Tom Mueller** » Mon Aug 18, 2008 8:00 am

'Anybody know of a source for or replacement of Fairchild's part number
S-112-7 (Landing gear attachment bushings) Thank's in advance.
Tom
Hanford,Ca'

Tom · Post by **Tom** » Sun May 06, 2012 8:19 pm

'Hey..
Any member got a source for the landing gear bushings for the F24W/R46 model. Part#S-112-7 Guess I need eight, but I see no drawings or dimensions anywhere. Not even sure what they're made of...any info would be greatly appreciated. I'm dead in the water..again
Tom
Hanford,Ca'

Jim higham · Post by **Jim higham** » Sun May 06, 2012 9:21 pm

'Tom
I dont see the drawing being available either, but the "fitting-landing gear attachment" drawing 40249 may be. Since the bushings are a sub assembly they might be on that drawing, how big of a hurry are you.
Jim Higham
F24R46108

________________________________
From: Tom
To: fairchildclub@yahoogroups.com
Sent: Sunday, May 6, 2012 9:19 PM
Subject: [fairchildclub] Landing gear bushings

Hey..
Any member got a source for the landing gear bushings for the F24W/R46 model. Part#S-112-7 Guess I need eight, but I see no drawings or dimensions anywhere. Not even sure what they're made of...any info would be greatly appreciated. I'm dead in the water..again
Tom
Hanford,Ca

[Non-text portions of this message have been removed]'

Tom · Post by **Tom** » Sun May 06, 2012 10:59 pm

'Jim
I don't have drawing 40249 on my CD even though the manuals make reference to that number. Just not on my CD. I do have drawing 40462 and you can kinda see were the bushing goes, but no dimensions. As far a being in a hurry, that particular phrase was dropped from my vocabulary about five years ago when I got my Fairchild. Let me know if you come across any dimensions Jim, I may have to have these made...Damn
Tom
Hanford,Ca

--- In fairchildclub@yahoogroups.com, Jim Higham wrote:
>
> Tom
> I dont see the drawing being available either, but the "fitting-landing gear attachment" drawing 40249 may be. Since the bushings are a sub assembly they might be on that drawing, how big of a hurry are you.
> Jim Higham
> F24R46108
>
>
> ________________________________
> From: Tom
> To: fairchildclub@yahoogroups.com
> Sent: Sunday, May 6, 2012 9:19 PM
> Subject: [fairchildclub] Landing gear bushings
>
>
> Â
> Hey..
> Any member got a source for the landing gear bushings for the F24W/R46 model. Part#S-112-7 Guess I need eight, but I see no drawings or dimensions anywhere. Not even sure what they're made of...any info would be greatly appreciated. I'm dead in the water..again
> Tom
> Hanford,Ca
>
>
>
>
> [Non-text portions of this message have been removed]
>

'

Patricia Banks · Post by **Patricia Banks** » Mon May 07, 2012 5:42 am

'Back when I replaced all of my bushing, I was fortunate to have a buddy with access to a CNC lathe. We made all new bushing from high strength 954 bronze. As I recall there was a SB tied to the bushings and the previously installed softer bronze was replaced by the higher strength bronze... the experts may be able to confirm or deny that but I remember reading it somewhere. Fortunately the material can be sourced in small quantities from McMaster Carr.
Just my opinion but the OE drawing may have limited use even if you could obtain it. Depending on the condition of your aircraft, the fuselage fittings are probably a little worn or elongated as will be the gear leg bores (I had to bush a few of those as well). The fuselage fittings were probably not very precise in the first place. Replacing the bushings was quite a bit more involed than I originally anticipated because the front and rear mounts must be aligned to get the bolts in. I custom made the bushing O.D.s to fit the given location based on measurments. I also left the I.D.s a few thou small. I installed all of them and then made a special reamer with a long guide pin so that the I.D.s could be reamed to the proper diameter and with the proper alignment between the two mount locations. My gear is very tight now (the lack of fore and aft movement when taxiing on grass is very apparent). It was a lot of work but necessary. The slightest
amount of play will put tremendous shear loads on the gear bolts and they will fail in time. I believe the recommendation is to replace the bolts every 100hrs. If the bushings are tight I'm not sure this would be necessary.

Matt
F-24 N4263S

--- On Sun, 5/6/12, Tom wrote:

From: Tom
Subject: [fairchildclub] Landing gear bushings
To: fairchildclub@yahoogroups.com
Date: Sunday, May 6, 2012, 10:19 PM

Hey..
Any member got a source for the landing gear bushings for the F24W/R46 model. Part#S-112-7 Guess I need eight, but I see no drawings or dimensions anywhere. Not even sure what they're made of...any info would be greatly appreciated. I'm dead in the water..again
Tom
Hanford,Ca

------------------------------------

Yahoo! Groups Links

[Non-text portions of this message have been removed]

'

Tom · Post by **Tom** » Mon May 07, 2012 9:52 am

'Excellent Matt, You nailed it. Thanks for taking the time to write a lengthy reponse. The old (bronze?) bushing just removed were kinda oval shaped and actually look like their made from material that just wasn't tough enough. It looks like I have some issues with fuselage lugs also. I can see at least one "steel bushing" in the fuselage lug is oval. When I got the airframe jacked up and the gear legs hanging free,I was astonished at the free play found in this critical area.I quess I'll be looking for correct bushings somewhere,and maybe some informal talk from members on welding and repair techniques to these fuselage lugs. This is big stuff, thanks

--- In fairchildclub@yahoogroups.com, Patricia Banks wrote:
>
> Back when I replaced all of my bushing, I was fortunate to have a buddy with access to a CNC lathe. We made all new bushing from high strength 954 bronze. As I recall there was a SB tied to the bushings and the previously installed softer bronze was replaced by the higher strength bronze... the experts may be able to confirm or deny that but I remember reading it somewhere. Fortunately the material can be sourced in small quantities from McMaster Carr.
> Just my opinion but the OE drawing may have limited use even if you could obtain it. Depending on the condition of your aircraft, the fuselage fittings are probably a little worn or elongated as will be the gear leg bores (I had to bush a few of those as well). The fuselage fittings were probably not very precise in the first place. Replacing the bushings was quite a bit more involed than I originally anticipated because the front and rear mounts must be aligned to get the bolts in. I custom made the bushing O.D.s to fit the given location based on measurments. I also left the I.D.s a few thou small. I installed all of them and then made a special reamer with a long guide pin so that the I.D.s could be reamed to the proper diameter and with the proper alignment between the two mount locations. My gear is very tight now (the lack of fore and aft movement when taxiing on grass is very apparent). It was a lot of work but necessary. The slightest
> amount of play will put tremendous shear loads on the gear bolts and they will fail in time. I believe the recommendation is to replace the bolts every 100hrs. If the bushings are tight I'm not sure this would be necessary.
>
> Matt
> F-24 N4263S
>
> --- On Sun, 5/6/12, Tom wrote:
>
>
> From: Tom
> Subject: [fairchildclub] Landing gear bushings
> To: fairchildclub@yahoogroups.com
> Date: Sunday, May 6, 2012, 10:19 PM
>
>
> Hey..
> Any member got a source for the landing gear bushings for the F24W/R46 model. Part#S-112-7 Guess I need eight, but I see no drawings or dimensions anywhere. Not even sure what they're made of...any info would be greatly appreciated. I'm dead in the water..again
> Tom
> Hanford,Ca
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

'

Tom_Downey · Post by **Tom_Downey** » Mon May 07, 2012 10:53 pm

'I used 4130 thick walled tubing to bush my gear attach points and welded them in and rereamed to size.

pretty easy to do.'

paul pinato · Post by **paul pinato** » Tue May 08, 2012 12:15 am

'Hi

I did the same. Steel bushings? reamed to size and
aligned with the gear.

No need to have bronze as the leg moves very
little. Also it is much easier to change bolt as
it is softer and wears instead of the bushings.

Important to lube often.

Paul

UC61A 4314840

Från: fairchildclub@yahoogroups.com
[mailto:fairchildclub@yahoogroups.com] För
Tom_Downey
Skickat: den 8 maj 2012 06:53
Till: fairchildclub@yahoogroups.com
Ämne: [fairchildclub] Re: Landing gear bushings

I used 4130 thick walled tubing to bush my gear
attach points and welded them in and rereamed to
size.

pretty easy to do.

[Non-text portions of this message have been removed]'

robert Etter · Post by **robert Etter** » Sat May 12, 2012 2:04 pm

' I would like to pass on some experience about the Main gear bushings that I had.

My 24 had a rough time a long time ago, and both sides were tweeked somewhat. The left side was off in allignment by a fraction of a degree, so it wasn't much of a problem. The right side rear was off in allignment by 1.3 degrees, and the front was off by 0.9 degrees. It doesn't sound like much, but when I put the bolts in place for the first time, it took a hammer to finish the job and the end result was that 1/2 of the treads on one side of the bolt were gone.

Since I had some new standard bushings, it didn't take much effort to determine the offset angle. I made a new set of bushings with the outer dimensions standard. The fun part came when I set up the bushing in the head stock of a lathe to get a 1.3 or 0.9 degree angle on the bolt hole. With the help of a CAD program to give me the right numbers, and some pieces of an old feeler guage, I shimmed the bushing in the head stock to give the proper angle, then drilled it and reamed it.

The tolerance was within