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Gear legs rusting in mounts

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doug.medema(at)comcast.ne
Guest

Posted: Mon Aug 20, 2007 9:01 pm Post subject: Gear legs rusting in mounts

I recently removed  my gear legs and found them to be corroded at

 the points they go  into the mounts, especially the lower collar.

 I have since  stripped, sanded, acid etched, conversion coated, 

 primed, and painted  the legs and am ready to reinstall them.  Since

 you can't paint over  the places with close tolerances, they will just

 rust again unless I  do something to protect them.  I was thinking

 of just putting a  good layer of grease on them, but am wondering

 if anybody else has  a better idea.

  

 Again, this is just  on the two areas that make contact with the

 gear mounts.   All the rest of it is protected.

  

 Thanks,

 Doug  Medema

 RV-6A N276DM down  for painting after 170 hours.

  

 

  8/20/2007 1:08 PM

     [quote][b]

Vanremog(at)aol.com
Guest

Posted: Mon Aug 20, 2007 9:24 pm Post subject: Gear legs rusting in mounts

In a message dated 8/20/2007 10:02:49 P.M. Pacific Daylight Time,  doug.medema(at)comcast.net writes:

  	  Quote: 	
		     I recently removed    my gear legs and found them to be corroded at

   the points they go    into the mounts, especially the lower collar.

   I have since    stripped, sanded, acid etched, conversion coated, 

   primed, and    painted the legs and am ready to reinstall them.     Since

   you can't paint    over the places with close tolerances, they will just

   rust again unless    I do something to protect them.  I was thinking

   of just putting a    good layer of grease on them, but am wondering

   if anybody else    has a better idea.

    

   Again, this is    just on the two areas that make contact with the

   gear mounts.     All the rest of it is protected.

	


 

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

  

 I used one of the corrosion resisting sprays applied just as I installed  them in late '97.  I've forgotten which LPS product I used and I  haven't removed the mains since installed, but I did retrofit my nose gear  a few years back and the old one came out easy and looked fine for its  age.   

 GV (RV-6A N1GV O-360-A1A, C/S, Flying 864hrs, Silicon Valley,  CA)



AOL.com.

  [quote][b]

billsettle(at)bellsouth.n
Guest

Posted: Tue Aug 21, 2007 12:53 am Post subject: Gear legs rusting in mounts

I've used this in the past with good results...



http://www.aircraftspruce.com/catalog/appages/corrosionx.php





 	  Quote: 	
		   

 From: "Doug Medema" <doug.medema(at)comcast.net>

 Date: 2007/08/20 Mon PM 11:59:34 EST

 To: <rv-list(at)matronics.com>

 Subject: Gear legs rusting in mounts

 

 I recently removed my gear legs and found them to be

 corroded at

 the points they go into the mounts, especially the lower

 collar.

 I have since stripped, sanded, acid etched, conversion

 coated, 

 primed, and painted the legs and am ready to reinstall them.

 Since

 you can't paint over the places with close tolerances, they

 will just

 rust again unless I do something to protect them.  I was

 thinking

 of just putting a good layer of grease on them, but am

 wondering

 if anybody else has a better idea.

  

 Again, this is just on the two areas that make contact with

 the

 gear mounts.  All the rest of it is protected.

  

 Thanks,

 Doug Medema

 RV-6A N276DM down for painting after 170 hours.

  

 

 Date: 8/20/2007 1:08 PM

rv9jim(at)juno.com
Guest

Posted: Tue Aug 21, 2007 5:06 am Post subject: Gear legs rusting in mounts

Doug,

        Here in the south with the salt air I would recommend using

"anti-seize" compound like  you use on your spark plugs.  If the steel is

clean, the anti-seize will protect it from rust.  Be very careful as the

stuff will "travel" if you get it on you and don't clean it off.  Its

hard to clean off once its on something.  You can use either the "silver"

colored or the "copper" colored anti-seize.  The copper stuff is higher

temp rated.

Jim

Bob Collins

Joined: 11 Mar 2006
Posts: 470
Location: St. Paul, Minnesota

Posted: Tue Aug 21, 2007 5:25 am Post subject: Gear legs rusting in mounts

My legs have been sitting  down in -- what used to be -- the family room (becoming a family room again now  that I'm moving stuff to the hangar). On Saturday I picked them up off the rug  and had two real nice rust stains on the carpet where the bottom of the legs (un  powdercoated) had been sitting for a year. Can't get the rust off the carpet,  but I sanded the legs and then just rubbed 3-in-1 all over them like I should've  done before.

  

 Anyway, couldn't you just  oil down the parts?



   From: owner-rv-list-server(at)matronics.com  [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of  Vanremog(at)aol.com

Sent: Tuesday, August 21, 2007 12:24  AM

To: rv-list(at)matronics.com

Subject: Re: Gear legs  rusting in mounts

 

  In a message dated 8/20/2007 10:02:49 P.M. Pacific Daylight Time,  doug.medema(at)comcast.net writes:

  	  Quote: 	
		     I recently removed my    gear legs and found them to be corroded at

   the points they go into    the mounts, especially the lower collar.

   I have since stripped,    sanded, acid etched, conversion coated, 

   primed, and painted the    legs and am ready to reinstall them.  Since

   you can't paint over the    places with close tolerances, they will just

   rust again unless I do    something to protect them.  I was thinking

   of just putting a good    layer of grease on them, but am wondering

   if anybody else has a    better idea.

    

   Again, this is just on    the two areas that make contact with the

   gear mounts.  All    the rest of it is protected.

	


 

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

  

 I used one of the corrosion resisting sprays applied just as I installed  them in late '97.  I've forgotten which LPS product I used and I  haven't removed the mains since installed, but I did retrofit my nose gear  a few years back and the old one came out easy and looked fine for its  age.   

 GV (RV-6A N1GV O-360-A1A, C/S, Flying 864hrs, Silicon Valley,  CA)



   AOL.com.

[quote]



href="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List

href="http://forums.matronics.com">http://forums.matronics.com



[b]

_________________
Bob Collins
St. Paul, Minn.
Letters from Flyover Country
http://rvnewsletter.blogspot.com/

aerokinetic(at)sbcglobal.
Guest

Posted: Tue Aug 21, 2007 6:06 pm Post subject: Gear legs rusting in mounts

Doug,

   

  Get yourself some Par-al-Ketone... it usually comes in a can with a bear on it, and you can get it from Spruce or any of the usual suspects (I prefer Wicks). It is an anti-corrosion agent commonly used in control cables. It comes out of the can as a slippery brown liquid with a viscosity similar to a very thick oil and 'dries' to a fairly soft waxy pariffinic film that won't come off on your hands but will deliver superb protection. It is *the* answer to your needs. It can be removed or thinned with Mineral Spirits and easily comes loose when needed to. It is safe on virtually all surfaces and isn't any more toxic than oil. Super handy stuff. Been using it for years. Put my wing bolts, gear legs and other items in 'wet' with it. They will never corrode. Ever. I'm convinced. There are other agents with similar properties, but this is easily found and all you need. It's cheap and one can will last you forever. You can even  use it for conditioner after shampooing for silky smooth hair... okay... maybe not.

   

  Scott

  N4ZW

  A&P 17 years for what it's worth.

   

  

 	  Quote: 	
		  >>>In a message dated 8/20/2007 10:02:49 P.M. Pacific Daylight Time,  

doug.medema(at)comcast.net writes:
	




I recently removed  my gear legs and found them to be corroded at

the points they go  into the mounts, especially the lower collar.

I have since  stripped, sanded, acid etched, conversion coated, 

primed, and  painted the legs and am ready to reinstall them.

 [quote][b]

aerobubba(at)earthlink.ne
Guest

Posted: Wed Aug 22, 2007 5:12 am Post subject: Gear legs rusting in mounts

Hi crew-

 	  Quote: 	
		  ... I would recommend using

"anti-seize" compound like you use on your spark plugs. ...

 
	


 Please be mindful of the fact that graphite, the useful ingredient in the

grey spark plug anti-seize, is corrosive to aluminum.



FWIW-



glen matejcek

aerobubba(at)earthlink.net

Vanremog(at)aol.com
Guest

Posted: Wed Aug 22, 2007 7:44 am Post subject: Gear legs rusting in mounts

In a message dated 8/22/2007 6:14:45 A.M. Pacific Daylight Time,  aerobubba(at)earthlink.net writes:

  	  Quote: 	
		  >...    I would recommend using

 	  Quote: 	
		  "anti-seize" compound like you use on your    spark plugs. ...


	


Please be mindful of the fact that graphite, the    useful ingredient in the

grey spark plug anti-seize, is corrosive to    aluminum.

	


 

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

  

 For different types of anti-seize compounds and their uses see http://www.lub-o-seal.com

 They can recommend the right material for the application.   

 GV (RV-6A N1GV O-360-A1A, C/S, Flying 864hrs, Silicon Valley,  CA)



AOL.com.

  [quote][b]

jrdial(at)hal-pc.org
Guest

Posted: Wed Aug 22, 2007 9:13 am Post subject: Gear legs rusting in mounts

I know the gear legs and mounts are not aluminum but the cylinder heads you are screwing the spark plugs in are aluminum?  

   

                        DO NOT ARCHIVE  

   

   

   

--

aerobubba(at)earthlink.ne
Guest

Posted: Thu Aug 23, 2007 5:08 am Post subject: Gear legs rusting in mounts

HI JR-



 	  Quote: 	
		  I know the gear legs and mounts are not aluminum but the cylinder heads

you are screwing the spark plugs in are aluminum?

 
	


That was the first thing that occurred to me when the whole graphite

causing Al corrosion was pointed out to me.  The fine print, though, is

that the spark plugs actually screw into steel inserts, like heli-coils. 

Hence the admonitions to use the anti-seize sparingly.  It prevents there

being excess compound which could migrate to contact with the aluminum head.

 

 



glen matejcek

aerobubba(at)earthlink.net

pitts_pilot(at)bellsouth.
Guest

Posted: Thu Aug 23, 2007 5:34 am Post subject: Gear legs rusting in mounts

glen matejcek wrote:

  	  Quote: 	
		      	  Quote: 	
		  --> RV-List message posted by: "glen matejcek" <aerobubba(at)earthlink.net> (aerobubba(at)earthlink.net)



HI JR-



        	  Quote: 	
		  I know the gear legs and mounts are not aluminum but the cylinder heads

you are screwing the spark plugs in are aluminum?

    	
    

That was the first thing that occurred to me when the whole graphite

causing Al corrosion was pointed out to me. 	
 	
 The only thing I've seen on the graqphite/aluminum subject was a picture of thin aluminum sheet that had been corroded through and a disc fell out.  Don't know any more about that particular situation though.

  	  Quote: 	
		      	  Quote: 	
		    The fine print, though, is

that the spark plugs actually screw into steel inserts, like heli-coils. 	
 	
 Only if they've been installed.  No steel inserts AFAIK in new cylinder heads.   	  Quote: 	
		      	  Quote: 	
		   Hence the admonitions to use the anti-seize sparingly.  It prevents there

being excess compound which could migrate to contact with the aluminum head. 	
 	
 The problem with excess antisieze is that a glob inside the cylinder will become red-hot without burning off and cause run-on during shutdown.

 Linn

 do not archive

 [quote]    	  Quote: 	
		  

 

 



glen matejcek

aerobubba(at)earthlink.net (aerobubba(at)earthlink.net)



  	
 [b]

dale1rv6(at)comcast.net
Guest

Posted: Thu Aug 23, 2007 8:58 pm Post subject: Gear legs rusting in mounts

 	  Quote: 	
		    The fine print, though, isthat the spark plugs actually screw into steel inserts, like heli-coils. 	
  

Only if they've been installed.  No steel inserts AFAIK in new cylinder heads.     	  Quote: 	
		   Hence the admonitions to use the anti-seize sparingly.  It prevents therebeing excess compound which could migrate to contact with the aluminum head. 	
  

The problem with excess antisieze is that a glob inside the cylinder will become red-hot without burning off and cause run-on during shutdown.

 Linn

 do not archive

 

   [quote]  Question about run-on: If firing sparkplugs don’t cause run-on during shutdown, how would red hot globs? Or would the real concern be pre-ignition during normal operation? Dale[b]

aerobubba(at)earthlink.ne
Guest

Posted: Fri Aug 24, 2007 5:13 am Post subject: Gear legs rusting in mounts

HI Linn-



 

 	  Quote: 	
		  > The fine print, though, is

>that the spark plugs actually screw into steel inserts, like heli-coils.

>

Only if they've been installed. No steel inserts AFAIK in new cylinder 

heads. 


	


That certainly makes sense, but my info on this issue came from Champion. 

I suppose it's not impossible that their reps pooched it...



 	  Quote: 	
		   

> Hence the admonitions to use the anti-seize sparingly. It prevents there

>being excess compound which could migrate to contact with the aluminum

head.
	


 	  Quote: 	
		  >

The problem with excess antisieze is that a glob inside the cylinder 

will become red-hot without burning off and cause run-on during shutdown.

Linn


	


I have a hard time imagining a scenario where one could properly apply any

type of dope on any male threads, and get it into the bore of the device. 

Plus, a glowing deposit in the cylinder should cause pre-ignition and

perhaps lead to detonation, which could well preclude run-on       Not

to mention, run on takes fuel, the absence of which is how we kill aircraft

engines anyway!



glen matejcek

aerobubba(at)earthlink.net

pitts_pilot(at)bellsouth.
Guest

Posted: Fri Aug 24, 2007 5:18 am Post subject: Gear legs rusting in mounts

Dale Walter wrote:

  	  Quote: 	
		                   <![endif]-->       <![endif]-->      



   

       	  Quote: 	
		    The fine print, though, isthat the spark plugs actually screw into steel inserts, like heli-coils. 	
   

Only if they've been installed.  No steel inserts AFAIK in new cylinder heads.      	  Quote: 	
		   Hence the admonitions to use the anti-seize sparingly.  It prevents therebeing excess compound which could migrate to contact with the aluminum head. 	
   

The problem with excess antisieze is that a glob inside the cylinder will become red-hot without burning off and cause run-on during shutdown.

 Linn

 do not archive

   

       	  Quote: 	
		    Question about run-on: If firing sparkplugs don’t cause run-on during shutdown, how would 	
   

 	
 red hot globs? Or would the real concern be pre-ignition during normal operation?

   	  Quote: 	
		         	  Quote: 	
		   Dale 	
   

 	
 Good point.  I've had run-on even after I've shut the mags off.  Especially in my Pitts (O-360)  after I've worked her hard and the temps are still up.  I hate the stink!  I've never noticed a pre-ignition problem, but that's really hard with that big snarling thing so close up front!  I do use auto fuel in it though.  The bottom line for me is the high temp stuff in the antisieze also makes it harder to burn off.

 Linn

 [quote]       	  Quote: 	
		  that the spark plugs actually screw into steel inserts, like heli-coils. 	
0 [b]

az_gila

Joined: 17 Jun 2006
Posts: 99
Location: Tucson, AZ

Posted: Sat Aug 25, 2007 5:52 am Post subject: Re: Gear legs rusting in mounts

This is similar to the nose gear mount in my Grumman Tiger.



The Maintenance Manual calls for the nose gear to be installed with a wet application of zinc chromate primer and then torqued.  Silicon sealer (RTV) is to be applied at the ends of the mounting socket to prevent entry of moisture.



It also calls for a yearly removal and inspection - a procedure most owners do not perform.



gil in Tucson

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