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main gear rubber cushions

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dredmoody(at)cox.net
Guest

Posted: Tue Jul 31, 2007 5:55 am Post subject: main gear rubber cushions

I may need to break down and call the factory but let's take a shot at speeding things up here.



Last evening I got my 601XL fuselage off the worktable and set it on sawhorses in preparation for mounting the big standard aluminum main gear legs. First, the assembly guide is pitifully inadequate at this stage so I need corroboration from experienced builders..... my guess is that the gear needs to be notched both forward side and aft side in order to fit the gear channel. That much seems obvious to me. What isn't obvious at all (at least to me) is where in the heck do I install the four pieces of rubber hose halves? 



The drawing (6G3, I think) shows "1/8" rubber" above and below the gear leg but it is far from clear whether the rubber being discussed is the half piece of hose or a rubber washer. I can't find any rubber washers in the supplied hardware (I bought the entire kit back in December 2005). 



Do I need to notch the rubber hose pieces to fit where I notch the gear legs or do they fit inboard to that area. If they are placed inboard to the mounting bolts, what keeps them from sliding around later? The text and the photos in the assembly guide do not begin to address these questions, much less provide the answer.



Also, have some of you opted out of drilling through the gear mounting bolts and used the non-Nylok self locking nuts on the gear mounts? The idea of trying to drill those 1/2" steel bolts for cotter pins is not an appealing proposition to me.



Last question..... is it a huge No-No to drill into the aft edge of the gear legs to screw in those rubber lined (Hadel?) clamps for securing the brake lines later? Is that just asking for a crack in the gear legs later on?



All help and advice is welcome here. Thanks,



Dred

DaveG601XL

Joined: 27 Oct 2006
Posts: 351
Location: Cincinnati, Oh

Posted: Tue Jul 31, 2007 7:45 am Post subject: Re: main gear rubber cushions

Dred,



My gear kit supplied four pieces of rubber hose cut in half lengthwise.  Per the assembly guide I installed one above and below the gear where it interfaces with the four bolts that hold it in place.  They were supplied oversize and need to be cut to length.



Per my actual communication with Zenith, they said it was OK to drill and tap the gear leg trailing edge to screw in adel clamps.  They steered me away from my original question about routing a channel on the training egde to imbed the brake line. 



Good luck

_________________
David Gallagher
Cincinnati, OH area

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Tue Jul 31, 2007 8:03 am Post subject: Re: main gear rubber cushions

I can ditto everything that Dave wrote but can add that I drilled a hole in the rubber so the bolt can go through them. And yes the half hoses are the rubber washers. They are there to seperate the steel mount from the aluminium gear.



As to drilling the holes in the bolts for the cotter I've put that off myself because I'm sure I'll go though multiple bits. Ask Zenith about using Nylocs and let me know what you hear.

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

dredmoody(at)cox.net
Guest

Posted: Tue Jul 31, 2007 8:05 am Post subject: main gear rubber cushions

Thanks for the fast reply.  Where in the name of Chas Lindberg did you find that info in the assembly guide? I've poured over it several times and did not pick up that tidbit. That explains why the rubber does not show in  the photos.... it is flattened out between the gear and the gear mount and likewise between the gear and the L-angle. Much clearer now. I'm guessing that I need to bore a couple of holes in each piece of rubber for the 1/2" bolts and that will make them stay put once installed, right?



Thanks again,



Dred

Do Not Archive



---- DaveG601XL <david.m.gallagher(at)ge.com> wrote: 

 	  Quote: 	
		   

 

 Dred,

 

 My gear kit supplied four pieces of rubber hose cut in half lengthwise.  Per the assembly guide I installed one above and below the gear where it interfaces with the four bolts that hold it in place.  They were supplied oversize and need to be cut to length.

 

 Per my actual communication with Zenith, they said it was OK to drill and tap the gear leg trailing edge to screw in adel clamps.  They steered me away from my original question about routing a channel on the training egde to imbed the brake line. 

 

 Good luck

 

 --------

 David Gallagher

 601 XL, tail and wings completed,

 fueslage almost done, engine next.

dredmoody(at)cox.net
Guest

Posted: Tue Jul 31, 2007 8:30 am Post subject: main gear rubber cushions

Actually Gig, what I was thinking about was the type of locknut that is all metal. I've heard them referred to as high temperature locknuts.



They are the AN363 nuts shown on this page at AS



http://www.aircraftspruce.com/menus/ha/nuts.html



Thanks for the help,



Dred



---- Gig Giacona <wr.giacona(at)suddenlink.net> wrote: 

 	  Quote: 	
		   

 

 I can ditto everything that Dave wrote but can add that I drilled a hole in the rubber so the bolt can go through them. And yes the half hoses are the rubber washers. They are there to seperate the steel mount from the aluminium gear.

 

 As to drilling the holes in the bolts for the cotter I've put that off myself because I'm sure I'll go though multiple bits. Ask Zenith about using Nylocs and let me know what you hear.

 

 --------

 W.R. &quot;Gig&quot; Giacona

 601XL Under Construction

DaveG601XL

Joined: 27 Oct 2006
Posts: 351
Location: Cincinnati, Oh

Posted: Tue Jul 31, 2007 8:38 am Post subject: Re: main gear rubber cushions

Dred,



Using the upper right corner of drawing 6-G-3 (08/05 version), I poured over the assembly guide and found decent shots on page 3 (top right and bottom pictures), page 4 (top picture), page 9 (bottom picture) and page 10 (top picture).  Now granted, the guide does not say a whole lot and without the drawing reference I would not have known what I was looking at.  What is really lacking is a torque spec or some sort of tightening instructions on the nuts. Mine is "snug."



As to Gig's cotter key hole comment, I did not ruin any drill bits.  I started with a 3/32 and drilled it by hand using the nut castelations as a visual guide.  I followed up with the smallest bit that allowed the key to go in.  No problems.



Good luck,

_________________
David Gallagher
Cincinnati, OH area

dredmoody(at)cox.net
Guest

Posted: Tue Jul 31, 2007 8:50 am Post subject: main gear rubber cushions

Thanks dave. Guess I'm just being a chicken,



Dred

Do Not Archive



---- DaveG601XL <david.m.gallagher(at)ge.com> wrote: 

 	  Quote: 	
		   

 

 Dred,

 

 Using the upper right corner of drawing 6-G-3 (08/05 version), I poured over the assembly guide and found decent shots on page 3 (top right and bottom pictures), page 4 (top picture), page 9 (bottom picture) and page 10 (top picture).  Now granted, the guide does not say a whole lot and without the drawing reference I would not have known what I was looking at.  What is really lacking is a torque spec or some sort of tightening instructions on the nuts. Mine is "snug."

 

 As to Gig's cotter key hole comment, I did not ruin any drill bits.  I started with a 3/32 and drilled it by hand using the nut castelations as a visual guide.  I followed up with the smallest bit that allowed the key to go in.  No problems.

 

 Good luck,

 

 --------

 David Gallagher

 601 XL, tail and wings completed,

 fueslage almost done, engine next.

dredmoody(at)cox.net
Guest

Posted: Tue Jul 31, 2007 8:52 am Post subject: main gear rubber cushions

Check the upper right corner drawing/specs on 6G3. There is a listing stating these nuts as an option.



Ed



---- Gig Giacona <wr.giacona(at)suddenlink.net> wrote: 

 	  Quote: 	
		   

 

 I can ditto everything that Dave wrote but can add that I drilled a hole in the rubber so the bolt can go through them. And yes the half hoses are the rubber washers. They are there to seperate the steel mount from the aluminium gear.

 

 As to drilling the holes in the bolts for the cotter I've put that off myself because I'm sure I'll go though multiple bits. Ask Zenith about using Nylocs and let me know what you hear.

 

 --------

 W.R. &quot;Gig&quot; Giacona

 601XL Under Construction

 See my progress at www.peoamerica.net/N601WR

Afterfxllc(at)aol.com
Guest

Posted: Tue Jul 31, 2007 9:10 am Post subject: main gear rubber cushions

You need to tighten them per the size bolt and nut not just "snug" when  they are tight you will have slightly bent the lower angle and I thought I was  gonna strip the nut but the specs in the book are correct. Im thinking it was  around 65 ft lbs but I don't have the book in front of me but the torque is up  there.

  

  

 Jeff



Get a sneak peek of the all-new AOL.com.

Afterfxllc(at)aol.com
Guest

Posted: Tue Jul 31, 2007 11:11 am Post subject: main gear rubber cushions

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Afterfxllc(at)aol.com
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Posted: Tue Jul 31, 2007 11:12 am Post subject: main gear rubber cushions

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dredmoody(at)cox.net
Guest

Posted: Tue Jul 31, 2007 11:54 am Post subject: main gear rubber cushions

Is there anything other than the squeeze of the bolt torque which will act to keep the upper rubber in place?



Dred



---- Afterfxllc(at)aol.com wrote: 

 	  Quote: 	
		    

 

         

 

 

 

 

 

 ************************************** Get a sneak peek of the all-new AOL at 

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amyvega2005(at)earthlink.
Guest

Posted: Tue Jul 31, 2007 1:11 pm Post subject: main gear rubber cushions

just the friction. your best bet is to not cut just to fit. but make it large and cut two holes to go over the Bolts, then it will not go anywhere.

Juan Vega

--

japhillipsga(at)aol.com
Guest

Posted: Wed Aug 01, 2007 11:17 am Post subject: main gear rubber cushions

Ed, I think that is about all. Those bolts are very big and strong and once tightened down they really put the slam on the rubber. I think ZAC could come up with something better than a piece of spit radiator hose though. Bill

 

 

 --

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Wed Aug 01, 2007 12:31 pm Post subject: Re: main gear rubber cushions

You do realize don't you that the scratch builders would look at whatever peice of rubber Zenith came up with and say, "I think a peice of radiator hose split in half would work great here."

 	  japhillipsga(at)aol.com wrote: 	
		  Ed, I think that is about all. Those bolts are very big and strong and once tightened down they really put the slam on the rubber. I think ZAC could come up with something better than a piece of spit radiator hose though. Bill

 

 

 --

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

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