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Undercarriage Nylok Nuts

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rv10free2fly(at)yahoo.com
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Posted: Fri Sep 30, 2016 10:22 pm Post subject: Undercarriage Nylok Nuts

When I was at Oshkosh in 2015 I stopped to chat to a poor RV-10 pilot (sorry I can't remember your name, however you had an English accent, so I'm assuming you weren't American, but I digress), who had experienced overheating of his brakes while taxiing in after landing, to the point where the wheel fairing caught fire.



Suffice to say that the undercarriage as a burnt mess.



Considering the potential for overheating of the brakes, I am considering swapping all the Nylok nuts on the undercarriage and brakes with all-metal stop nuts.



Have others adopted a similar course of action as a contingency?



Is there any disadvantage of using the cadmium plated all-metal lock nuts?



Warm regards



Patrick

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eagerlee

Joined: 28 Jan 2006
Posts: 35

Posted: Mon Oct 03, 2016 5:30 am Post subject: Re: Undercarriage Nylok Nuts

We replaced all the nylok nuts at the brake calipers with high temperature lock nuts for the very reason you stated - things could get HOT sometimes.

Paul Hahn

N82FF

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Kelly McMullen

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

Posted: Mon Oct 03, 2016 12:29 pm Post subject: Undercarriage Nylok Nuts

If the nylocs on the calipers get hot enough to fail, you will have already overheated the O rings and likely have brake fluid leaking.



While some have replaced the O-rings of standard MS designation with Viton for heat resistance, there is a lot of mass to dissapate heat in the calipers. Nice to add protection, but the caliper manufacturers seem to mostly use nylock and proably have a good idea the heat stress for those nuts.



-sent from the I-droid implanted in my forearm

 

On Mon, Oct 3, 2016 at 6:30 AM, eagerlee <eagerlee(at)comcast.net (eagerlee(at)comcast.net)> wrote:

 	  Quote: 	
		  --> RV10-List message posted by: "eagerlee" <eagerlee(at)comcast.net (eagerlee(at)comcast.net)>

 

 We replaced all the nylok nuts at the brake calipers with high temperature lock nuts for the very reason you stated - things could get HOT sometimes.

 Paul Hahn

 N82FF

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=460906#460906

 

 

 

 

 

 

 

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

rv10free2fly(at)yahoo.com
Guest

Posted: Tue Oct 04, 2016 2:57 am Post subject: Undercarriage Nylok Nuts

Many thanks for cementing my thoughts Paul.



Warm regards



Patrick



 	  Quote: 	
		   On 4 Oct 2016, at 00:00, eagerlee <eagerlee(at)comcast.net> wrote:

 

 

 

 We replaced all the nylok nuts at the brake calipers with high temperature lock nuts for the very reason you stated - things could get HOT sometimes.

 Paul Hahn

 N82FF

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=460906#460906

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