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Leaky Matco Brake

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AirMike

Joined: 27 Feb 2007
Posts: 514
Location: Nevada

Posted: Mon Aug 17, 2009 4:14 am Post subject: Leaky Matco Brake

I had a heck of a time with the Matco Brake last week. It seems that the threads on the brass fitting that comes out of the brake itself have a wierd NPT fitting that does not marry well to the AN fitting. It was still leaking after the second time I sealed it. What a mess with hyro fluid all over the floor of the Pilot side. Finally I took it off and using form-a-gasket #2 assembled it. I cranked the heck out of the AN fitting on the vise and got it really tight. Finally - no more hydro fluid dripping on my face and arms.



Advice - crank the AN fitting down really tight

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_________________
See you OSH '18
Q/B - sold.

pitts_pilot(at)bellsouth.
Guest

Posted: Mon Aug 17, 2009 4:29 am Post subject: Leaky Matco Brake

Thanks for the heads up.  Could the problem be a badly machined part?

Linn



AirMike wrote:

 	  Quote: 	
		   

 

 I had a heck of a time with the Matco Brake last week. It seems that the threads on the brass fitting that comes out of the brake itself have a wierd NPT fitting that does not marry well to the AN fitting. It was still leaking after the second time I sealed it. What a mess with hyro fluid all over the floor of the Pilot side. Finally I took it off and using form-a-gasket #2 assembled it. I cranked the heck out of the AN fitting on the vise and got it really tight. Finally - no more hydro fluid dripping on my face and arms.

 

 Advice - crank the AN fitting down really tight

 

 --------

 OSH '09 or Bust (busted) be there someday

 Q/B Kit - end game

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p 58149#258149

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Kellym

Joined: 10 Jan 2006
Posts: 1706
Location: Sun Lakes AZ

Posted: Mon Aug 17, 2009 4:30 am Post subject: Leaky Matco Brake

Yes, the fitting into the caliper is pipe thread. No you should NOT need 

excessive tightening on the AN flare fitting. Either the fitting or the 

flare are likely to have a nick, causing the leak. Anytime a flare 

fitting needs more than moderate tightening there is a problem. Tighter 

is not better, and is likely to crack a tube flare.

Kelly

A&P



AirMike wrote:

 	  Quote: 	
		   

 

 I had a heck of a time with the Matco Brake last week. It seems that the threads on the brass fitting that comes out of the brake itself have a wierd NPT fitting that does not marry well to the AN fitting. It was still leaking after the second time I sealed it. What a mess with hyro fluid all over the floor of the Pilot side. Finally I took it off and using form-a-gasket #2 assembled it. I cranked the heck out of the AN fitting on the vise and got it really tight. Finally - no more hydro fluid dripping on my face and arms.

 

 Advice - crank the AN fitting down really tight

 

 --------

 OSH '09 or Bust (busted) be there someday

 Q/B Kit - end game

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p 58149#258149

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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

dlm46007(at)cox.net
Guest

Posted: Mon Aug 17, 2009 4:44 am Post subject: Leaky Matco Brake

When you bleed the brakes, be sure and compress the puck before bleeding

from the bottom and if you heat the tube to fit the brake valve nipple be

sure and have fluid to the top of the tube before connecting to the nipple. 



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