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Matco parking brake valve fail

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woxofswa

Joined: 12 Aug 2008
Posts: 349
Location: AZ

Posted: Tue May 13, 2014 4:56 pm Post subject: Matco parking brake valve fail

As I was setting the parking brake today, my left foot went to the firewall with a squirt sound and there were tiny droplets of brake fluid all over my shoes.



I've got Bonaco lines so I knew they didn't fail.  After wiping everything up I discovered that the leak was in the valve itself right at the bottom where the axle pin for the valve lever seats.  When I pressed down hard it blew out with a force.



Anybody have a similar issue or suggestions?  I called Matco at 4:30 ish but there was no answer



It is going to be a metric PITA to change out that valve.

_________________
Myron Nelson
Mesa, AZ
Flew May 10 2014

fdombroski

Joined: 14 Mar 2009
Posts: 33
Location: Westfield NJ

Posted: Wed May 14, 2014 5:12 am Post subject: Re: Matco parking brake valve fail

Myron, the Matco valve has o-rings that have a history of leaking.  Look up at the valve on the firewall and I suspect you will find the origin of the leak.  If so, you will need to pull the valve and replace the o-rings or send it to Matco for a mod if it is the older model.



Cheers,

Frank

johngoodman

Joined: 18 Sep 2006
Posts: 530
Location: GA

Posted: Wed May 14, 2014 6:24 am Post subject: Re: Matco parking brake valve fail

That isn't good....  Does it only leak when it's set? The reason I ask is if the plane is still flyable to get it home.

John

_________________
#40572 Phase One complete in 2011

davidsoutpost(at)comcast.
Guest

Posted: Wed May 14, 2014 11:03 am Post subject: Matco parking brake valve fail

Mine leaked pretty good and it was brand new.  I ended up replacing the O rings and that took care of the problem.

From: "johngoodman" <johngoodman(at)earthlink.net>

To: rv10-list(at)matronics.com

Sent: Wednesday, May 14, 2014 10:24:41 AM

Subject: Re: Matco parking brake valve fail

--> RV10-List message posted by: "johngoodman" <johngoodman(at)earthlink.net>

That isn't good....  Does it only leak when it's set? The reason I ask is if the plane is still flyable to get it home.

John

--------

#40572 Phase One complete in 2011

Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=423280#423280

<=                     &==

woxofswa

Joined: 12 Aug 2008
Posts: 349
Location: AZ

Posted: Wed May 14, 2014 2:30 pm Post subject: Re: Matco parking brake valve fail

Getting home was a trick because I could only turn right on the ground,  but figured that the home ramp was big enough to do a right 270 if I needed to go left.  Thankfully,  it worked out. 



 This morning I did one of the most physically challenging things of the entire build which was worm myself under the panel around the stick and prop up on a kidney braced with a rib with both arms intertwined into the cables and rudder pedals, disregarding the sweat and brake fluid seeping into my eyes,  to remove the lines from the devil spawned valve and join the cable ends together with spare male male through wall fittings I just happened to have .  Luckily with both legs extended scorpion tail style out the door opening I was able to move the one that still had bloodflow as a counterbalance to my twisted spine. 

Expecting a friend coming by I get a phone call so I manage to flex my man boob enough to push my phone up high enough to pluck the phone out of my shirt pocket with my teeth and drop it on the footwell floor. The caller ID says Van's, so I contort enough to tap answer with my elbow only to be asked by Van's Chevrolet in Scottsdale if it was a convenient time to discuss my future automotive needs.

_________________
Myron Nelson
Mesa, AZ
Flew May 10 2014

jeff(at)westcottpress.com
Guest

Posted: Wed May 14, 2014 3:11 pm Post subject: Matco parking brake valve fail

Where's the "Like" button Myron?



I've been under the panel for the last 2 months finishing things up. You've described it perfectly.



Jeff Carpenter

40304



Do Not Archive

On May 14, 2014, at 3:30 PM, woxofswa wrote:



 	  Quote: 	
		   

 

 Getting home was a trick because I could only turn right on the griund, (except high speed) but it worked out.  This morning I did one of the most physically challenging things of the entire build which was worm myself under the panel around the stick and prop up on a kidney braced with a rib with both arms intertwined into the cables and rudder pedals, sweat and brake fluid seeping into my eyes,  to remove the lines from the devil spawned valve and join the cable ends together with spare male male through wall fittings I just happened to have .  Expecting a friend coming by I get a phone call so I manage to flex my man boob enough to push my phone up high enough to pluck the phone out of my shit pocket with my teeth and tap answer with my elbow only to be asked by my local Chevy dealer if it was a convenient time to discuss my future automotive needs.

 

 --------

 Myron Nelson

 Mesa, AZ

 Emp completed, QB wings completed, legacy build fuse on gear.  FWF complete.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=423292#423292

sean(at)braunandco.com
Guest

Posted: Wed May 14, 2014 4:37 pm Post subject: Matco parking brake valve fail

Excellent!



--

Lenny Iszak

Joined: 23 Mar 2008
Posts: 270

Posted: Thu May 15, 2014 4:25 am Post subject: Re: Matco parking brake valve fail

Haa, love the vivid description of what I call airplane yoga...

btw Matco sells a supposedly better valve now that looks like this 



http://static.veracart.com/matco/item_images/set_1/3579/lg.jpg

_________________
Lenny Iszak
Palm City, FL
2014 RV-10, N311LZ - 500 hrs

dhmoose

Joined: 22 Nov 2010
Posts: 29
Location: Portland, OR

Posted: Thu May 15, 2014 6:14 am Post subject: Re: Matco parking brake valve fail

 	  woxofswa wrote: 	
		  Getting home was a trick because I could only turn right on the ground,  but figured that the home ramp was big enough to do a right 270 if I needed to go left.  Thankfully,  it worked out. 



 This morning I did one of the most physically challenging things of the entire build which was worm myself under the panel around the stick and prop up on a kidney braced with a rib with both arms intertwined into the cables and rudder pedals, disregarding the sweat and brake fluid seeping into my eyes,  to remove the lines from the devil spawned valve and join the cable ends together with spare male male through wall fittings I just happened to have .  Luckily with both legs extended scorpion tail style out the door opening I was able to move the one that still had bloodflow as a counterbalance to my twisted spine. 

Expecting a friend coming by I get a phone call so I manage to flex my man boob enough to push my phone up high enough to pluck the phone out of my shirt pocket with my teeth and drop it on the footwell floor. The caller ID says Van's, so I contort enough to tap answer with my elbow only to be asked by Van's Chevrolet in Scottsdale if it was a convenient time to discuss my future automotive needs. 	




I've never laughed that hard at a post before! Excellent description. I think it was even funnier since I know exactly what you're talking about since I've been there, done that  When I installed the valve, I remember thinking, "This would be a serious PITA if I need to service this later". I'm now hoping I don't ever have to replace my valve! Thanks for the laugh.

_________________
David Halmos
RV-10
Flying!
Portland, OR

bobw

Joined: 31 Mar 2014
Posts: 8
Location: Marquette, MI

Posted: Thu May 15, 2014 6:26 am Post subject: Matco parking brake valve fail

Myron,



Thanks for the laugh.  I let my personal trainer look at this and she is developing a list of exercises that might help me.  If it had been me I'd had to have had a 2nd person there to "extract" me!!



Bob Wilson



--

_________________
Bob Wilson
bob@rjw.cc

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