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parking brake valve

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cjhukill(at)cox.net
Guest

Posted: Thu Sep 01, 2011 5:54 am Post subject: parking brake valve

I read with interest about the folks that had  leakage of their Matco PV-1 valve. I bought mine from Vans back in 06 and wonder  what vintage of these valves have problems. I am about to close up the forward  section of the fuselage, and thus make the access to the valve difficult. I have  tested all the brake lines with compressed air during the tunnel work, but I  don't remember testing the valve. Does anyone know which valves may have  problems and how to identify such. Also what tests short of pumping brake fluid  under pressure would reveal a defect (not really an option for me  yet).

 Chris Hukill

 worlds slowest builder

   [quote][b]

dmaib(at)mac.com
Guest

Posted: Thu Sep 01, 2011 6:06 am Post subject: parking brake valve

I bought mine back in 06 or 07 from Van's and have had no problems with it. Also have had no problems with my brake cylinders. About 400 hours on the airplane to date.



David Maib

40559

Flying



On Sep 1, 2011, at 9:49 AM, Chris Hukill wrote:

 	  Quote: 	
		  I read with interest about the folks that had leakage of their Matco PV-1 valve. I bought mine from Vans back in 06 and wonder what vintage of these valves have problems. I am about to close up the forward section of the fuselage, and thus make the access to the valve difficult. I have tested all the brake lines with compressed air during the tunnel work, but I don't remember testing the valve. Does anyone know which valves may have problems and how to identify such. Also what tests short of pumping brake fluid under pressure would reveal a defect (not really an option for me yet).

Chris Hukill

worlds slowest builder

 	  Quote: 	
		  



href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List

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

href="http://www.matronics.com/contribution">http://www.matronics.com/contribution

pitts_pilot(at)bellsouth.
Guest

Posted: Thu Sep 01, 2011 6:07 am Post subject: parking brake valve

Revisit the compressed air test and spray soapy water over the     valve.  Air will show up easier than the fluid will in the short     term.  However, the higher pressures on the brake fluid will show up     later on.

     Wipe up the water as best you can.

     Linn

     

     

     

     On 9/1/2011 9:49 AM, Chris Hukill wrote:     [quote]                            I read with interest about the           folks that had leakage of their Matco PV-1 valve. I bought           mine from Vans back in 06 and wonder what vintage of these           valves have problems. I am about to close up the forward           section of the fuselage, and thus make the access to the valve           difficult. I have tested all the brake lines with compressed           air during the tunnel work, but I don't remember testing the           valve. Does anyone know which valves may have problems and how           to identify such. Also what tests short of pumping brake fluid           under pressure would reveal a defect (not really an option for           me yet).

       Chris Hukill

       worlds slowest builder

        	  Quote: 	
		  

	
     [b]

kearney

Joined: 20 Sep 2008
Posts: 563

Posted: Thu Sep 01, 2011 7:06 am Post subject: parking brake valve

Hi Chris



Mine was the older style. The problem I had was not unusual. I strongly suggest finding a way to get brake fluid into the system for testing. In my case the problem was weeping after the brakes set. It took a day or so for the "weep" to show around the fittings. 



Unless the leaks are significant, it may be difficult to spot soap bubbles around the fittings especially if access is tight. I used Kleenex wrapped around the fittings after a few hours to detect leaks. Fluid shows upvalve bright red stain. Even a very small one. 



In the case of my master cylinder, the bottom fitting is weeping with just static pressure. Again it takes a few days for a drop of fluid to show. I replaced the fitting in this location and used lots pipe sealant  but it still leaks.  I plan to pull the cylinder and bench check. This will be a major PITA. 



Cheers



Les



Sent from my iPhone



On 2011-09-01, at 8:49 AM, Chris Hukill wrote:



I read with interest about the folks that had leakage of their Matco PV-1 valve. I bought mine from Vans back in 06 and wonder what vintage of these valves have problems. I am about to close up the forward section of the fuselage, and thus make the access to the valve difficult. I have tested all the brake lines with compressed air during the tunnel work, but I don't remember testing the valve. Does anyone know which valves may have problems and how to identify such. Also what tests short of pumping brake fluid under pressure would reveal a defect (not really an option for me yet).

Chris Hukill

worlds slowest builder





---

Mauledriver(at)nc.rr.com
Guest

Posted: Thu Sep 01, 2011 7:57 am Post subject: parking brake valve

At this point, I'm thinking that  the PV-1 design is subject to     leaks unless the factory has done the mod to insert O-rings on the     fittings leading to the master cylinders.  That's what I gathered     from the list, and from talking to a guy at Matco.  Assuming the     leak is in the 'front' or master cylinder side, they will take it     back, do the mod, and send it back to me.

     

     It is a PITA.  I'm flying right now with fluid weeping from the     device everytime I use the brakes.  Run-up is the worse.  I did     attempt to torque the fittings down harder to no avail.  To remove     the device is to stop flying ((at) 10hours!!).  

     

     I'm getting ready  to replace it with a bracket that should support     all 4 fittings at least long enough to get the factory mod.  In     essence, all I'm doing is returning to the orginal factory design.      So, I'll drain all the fluid, install bracket, refill and bleed,     then return the unit for modification, then drain again, re-install     brake, refill and bleed. It might be the perfect opportunity to use     some of the super high temp fluid.... or not.

     

     I'd talk to Matco and see if they will do the mod independent of     whether it leaks.  That would save the awkward, after-first-flight     operation I'm doing right now.

     

     Or just drop the dime and get their new one.

     

     Or best of all, as my Tech Counselor expounded on when I showed him     the brake additions, "I don't believe in parking brakes.  You can't     trust them overnight, they can leak, etc, I wouldn't put one on     there if it was my plane". He's batting .999 so far.

     

     The main reason I chose to put it on there is my experience with my     tailwheel Maule.  A smooth ramp with a little slope, some wind, or     some prop blast and the thing will be rolling.  It's not the same     with the '10.  I mainly need a good rudder lock and a rear panel     bracket for my Bogy Bar like Dave S. has.

     

     Bill "starting to like the taste of brake fluid, not!" Watson

     

     

     

     On 9/1/2011 9:49 AM, Chris Hukill wrote:     [quote]                            I read with interest about the           folks that had leakage of their Matco PV-1 valve. I bought           mine from Vans back in 06 and wonder what vintage of these           valves have problems. I am about to close up the forward           section of the fuselage, and thus make the access to the valve           difficult. I have tested all the brake lines with compressed           air during the tunnel work, but I don't remember testing the           valve. Does anyone know which valves may have problems and how           to identify such. Also what tests short of pumping brake fluid           under pressure would reveal a defect (not really an option for           me yet).

       Chris Hukill

       worlds slowest builder

        	  Quote: 	
		  

	
     [b]

msausen

Joined: 25 Oct 2007
Posts: 559
Location: Appleton, WI USA

Posted: Thu Sep 01, 2011 8:09 am Post subject: parking brake valve

I wouldn't recommend that the parking break valve be used for long periods, they are really intended to provide temporary relief or until you can tie down.  Incidentally, there was really no one run of the old PV1 style that had the problem.  It was the deign which is why they redesigned it.



Michael



--

mregoan(at)hispeed.ch
Guest

Posted: Thu Sep 01, 2011 11:45 am Post subject: parking brake valve

Our local airport has a sloping ramp by the fuel pumps.  Last year I was waiting behind a Diamond Twin Star to fuel up whilst the owner had wandered off somewhere.  As the DA-42 started to roll backwards I ran over and stuck my foot behind the main tire when the tail was only about 2ft away from the brick hangar wall.   

   

5 minutes later the owner turns up and asks me what the f!?* I’m doing hanging around underneath his plane.  

   

Since then I believe firmly in parking brakes.  Does a -10 really not roll that well?  

   

Gordon Anderson  

#41015 (reinforcing wingtip nutplate holes)  

       

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Bill Watson

 Sent: 01 September 2011 17:54

 To: rv10-list(at)matronics.com

 Subject: Re: parking brake valve  

  

  

   

At this point, I'm thinking that  the PV-1 design is subject to leaks unless the factory has done the mod to insert O-rings on the fittings leading to the master cylinders.  That's what I gathered from the list, and from talking to a guy at Matco.  Assuming the leak is in the 'front' or master cylinder side, they will take it back, do the mod, and send it back to me.

 

 It is a PITA.  I'm flying right now with fluid weeping from the device everytime I use the brakes.  Run-up is the worse.  I did attempt to torque the fittings down harder to no avail.  To remove the device is to stop flying ((at) 10hours!!).  

 

 I'm getting ready  to replace it with a bracket that should support all 4 fittings at least long enough to get the factory mod.  In essence, all I'm doing is returning to the orginal factory design.  So, I'll drain all the fluid, install bracket, refill and bleed, then return the unit for modification, then drain again, re-install brake, refill and bleed. It might be the perfect opportunity to use some of the super high temp fluid.... or not.

 

 I'd talk to Matco and see if they will do the mod independent of whether it leaks.  That would save the awkward, after-first-flight operation I'm doing right now.

 

 Or just drop the dime and get their new one.

 

 Or best of all, as my Tech Counselor expounded on when I showed him the brake additions, "I don't believe in parking brakes.  You can't trust them overnight, they can leak, etc, I wouldn't put one on there if it was my plane". He's batting .999 so far.

 

 The main reason I chose to put it on there is my experience with my tailwheel Maule.  A smooth ramp with a little slope, some wind, or some prop blast and the thing will be rolling.  It's not the same with the '10.  I mainly need a good rudder lock and a rear panel bracket for my Bogy Bar like Dave S. has.

 

 Bill "starting to like the taste of brake fluid, not!" Watson

 

 

 

 On 9/1/2011 9:49 AM, Chris Hukill wrote:     

I read with interest about the folks that had leakage of their Matco PV-1 valve. I bought mine from Vans back in 06 and wonder what vintage of these valves have problems. I am about to close up the forward section of the fuselage, and thus make the access to the valve difficult. I have tested all the brake lines with compressed air during the tunnel work, but I don't remember testing the valve. Does anyone know which valves may have problems and how to identify such. Also what tests short of pumping brake fluid under pressure would reveal a defect (not really an option for me yet).  

    

Chris Hukill  

    

worlds slowest builder  

   	  Quote: 	
		     	
  

    	  Quote: 	
		    	
[/b][/quote]http://forums.matronics.com[/url]         - List Contribution Web generous nbsp;                        --> http://www.matronics.com/c=[/b] [b]

Mauledriver(at)nc.rr.com
Guest

Posted: Thu Sep 01, 2011 1:59 pm Post subject: parking brake valve

Some would point out that chocks are what's required.  Arguable.  I     chose a parking brake, but I'm sick of the leak.

     

     Bill "a piece of Steelhead finally killed the brake fluid taste in     my mouth" Watson

     

     On 9/1/2011 3:36 PM, Gordon Anderson wrote:     [quote]                          <![endif]-->       <![endif]-->                

Our             local airport has a sloping ramp by the fuel pumps.  Last             year I was waiting behind a Diamond Twin Star to fuel up             whilst the owner had             wandered off somewhere.  As the DA-42 started to roll             backwards I ran over             and stuck my foot behind the main tire when the tail was             only about 2ft away             from the brick hangar wall.          

          

5             minutes later the owner turns up and asks me what the f!?*             I’m             doing hanging around underneath his plane.         

          

Since             then I believe firmly in parking brakes.  Does a -10             really not roll that well?         

          

Gordon             Anderson         

#41015             (reinforcing wingtip nutplate holes)         

                                  

From:                 owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com)                 [mailto:owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com)] On                   Behalf Of Bill Watson

                 Sent: 01 September 2011 17:54

                 To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)

                 Subject: Re: parking brake valve           

         

         

          

At this point, I'm thinking that  the PV-1           design is           subject to leaks unless the factory has done the mod to insert           O-rings on the           fittings leading to the master cylinders.  That's what I           gathered from the           list, and from talking to a guy at Matco.  Assuming the leak           is in the           'front' or master cylinder side, they will take it back, do           the mod, and send           it back to me.

           

           It is a PITA.  I'm flying right now with fluid weeping from           the device           everytime I use the brakes.  Run-up is the worse.  I did           attempt to           torque the fittings down harder to no avail.  To remove the           device is to           stop flying ((at) 10hours!!).  

           

           I'm getting ready  to replace it with a bracket that should           support all 4           fittings at least long enough to get the factory mod.  In           essence, all I'm           doing is returning to the orginal factory design.  So, I'll           drain all the           fluid, install bracket, refill and bleed, then return the unit           for           modification, then drain again, re-install brake, refill and           bleed. It might be           the perfect opportunity to use some of the super high temp           fluid.... or not.

           

           I'd talk to Matco and see if they will do the mod independent           of whether it           leaks.  That would save the awkward, after-first-flight           operation I'm           doing right now.

           

           Or just drop the dime and get their new one.

           

           Or best of all, as my Tech Counselor expounded on when I           showed him the brake           additions, "I don't believe in parking brakes.  You can't           trust them           overnight, they can leak, etc, I wouldn't put one on there if           it was my           plane". He's batting .999 so far.

           

           The main reason I chose to put it on there is my experience           with my tailwheel           Maule.  A smooth ramp with a little slope, some wind, or some           prop blast           and the thing will be rolling.  It's not the same with the           '10.  I           mainly need a good rudder lock and a rear panel bracket for my           Bogy Bar like           Dave S. has.

           

           Bill "starting to like the taste of brake fluid, not!" Watson

           

           

           

           On 9/1/2011 9:49 AM, Chris Hukill wrote:                     

I               read with interest about the folks that had leakage of               their Matco PV-1 valve.               I bought mine from Vans back in 06 and wonder what vintage               of these valves have               problems. I am about to close up the forward section of               the fuselage, and thus               make the access to the valve difficult. I have tested all               the brake lines with               compressed air during the tunnel work, but I don't               remember testing the valve.               Does anyone know which valves may have problems and how to               identify such. Also               what tests short of pumping brake fluid under pressure               would reveal a defect               (not really an option for me yet).         

                    

Chris               Hukill         

                    

worlds slowest               builder         

          	  Quote: 	
		     	
         

           	  Quote: 	
		    	
         http://www.matronic=================http://forums.matronics.com                       - List Contribution Web generous               nbsp;                        --> http://www.matronics.com/c=                  	  Quote: 	
		   	
               

                      	  Quote: 	
		  

	
     [b]

Mauledriver(at)nc.rr.com
Guest

Posted: Thu Sep 01, 2011 2:01 pm Post subject: parking brake valve

FWIW, I had leaks  on both left brakes from one of the fittings.  I'm 

sure I torqued it as hard as I dared at the time, but I managed to get 

another 180deg turn out of all of them.  No sealant, no leaks now.



On 9/1/2011 11:03 AM, LES KEARNEY wrote:

 	  Quote: 	
		   In the case of my master cylinder, the bottom fitting is weeping with just static pressure. Again it takes a few days for a drop of fluid to show. I replaced the fitting in this location and used lots pipe sealant  but it still leaks.  I plan to pull the cylinder and bench check. This will be a major PITA.



 Cheers



 Les

Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Thu Sep 01, 2011 3:27 pm Post subject: parking brake valve

Chocks are worthless while you are parked on a slope, solo, with no one 

to help hold the plane to get out and install the chocks. Ditto in 

strong winds. Parking brake is to hold airplane just long enough to 

secure it by other means.



On 9/1/2011 2:56 PM, Bill Watson wrote:

 	  Quote: 	
		   Some would point out that chocks are what's required. Arguable. I 

 chose a parking brake, but I'm sick of the leak.



 Bill "a piece of Steelhead finally killed the brake fluid taste in my 

 mouth" Watson



 On 9/1/2011 3:36 PM, Gordon Anderson wrote:

>

> Our local airport has a sloping ramp by the fuel pumps. Last year I 

> was waiting behind a Diamond Twin Star to fuel up whilst the owner 

> had wandered off somewhere. As the DA-42 started to roll backwards I 

> ran over and stuck my foot behind the main tire when the tail was 

> only about 2ft away from the brick hangar wall.

>

> 5 minutes later the owner turns up and asks me what the f!?* I’m 

> doing hanging around underneath his plane.

>

> Since then I believe firmly in parking brakes. Does a -10 really not 

> roll that well?

>

> Gordon Anderson

>

> #41015 (reinforcing wingtip nutplate holes)

>

> *From:*owner-rv10-list-server(at)matronics.com 

> [mailto:owner-rv10-list-server(at)matronics.com] *On Behalf Of *Bill Watson

> *Sent:* 01 September 2011 17:54

> *To:* rv10-list(at)matronics.com

> *Subject:* Re: parking brake valve

>

> At this point, I'm thinking that the PV-1 design is subject to leaks 

> unless the factory has done the mod to insert O-rings on the fittings 

> leading to the master cylinders. That's what I gathered from the 

> list, and from talking to a guy at Matco. Assuming the leak is in the 

> 'front' or master cylinder side, they will take it back, do the mod, 

> and send it back to me.

>

> It is a PITA. I'm flying right now with fluid weeping from the device 

> everytime I use the brakes. Run-up is the worse. I did attempt to 

> torque the fittings down harder to no avail. To remove the device is 

> to stop flying ((at) 10hours!!).

>

> I'm getting ready to replace it with a bracket that should support 

> all 4 fittings at least long enough to get the factory mod. In 

> essence, all I'm doing is returning to the orginal factory design. 

> So, I'll drain all the fluid, install bracket, refill and bleed, then 

> return the unit for modification, then drain again, re-install brake, 

> refill and bleed. It might be the perfect opportunity to use some of 

> the super high temp fluid.... or not.

>

> I'd talk to Matco and see if they will do the mod independent of 

> whether it leaks. That would save the awkward, after-first-flight 

> operation I'm doing right now.

>

> Or just drop the dime and get their new one.

>

> Or best of all, as my Tech Counselor expounded on when I showed him 

> the brake additions, "I don't believe in parking brakes. You can't 

> trust them overnight, they can leak, etc, I wouldn't put one on there 

> if it was my plane". He's batting .999 so far.

>

> The main reason I chose to put it on there is my experience with my 

> tailwheel Maule. A smooth ramp with a little slope, some wind, or 

> some prop blast and the thing will be rolling. It's not the same with 

> the '10. I mainly need a good rudder lock and a rear panel bracket 

> for my Bogy Bar like Dave S. has.

>

> Bill "starting to like the taste of brake fluid, not!" Watson

>

> On 9/1/2011 9:49 AM, Chris Hukill wrote:

>

> I read with interest about the folks that had leakage of their Matco 

> PV-1 valve. I bought mine from Vans back in 06 and wonder what 

> vintage of these valves have problems. I am about to close up the 

> forward section of the fuselage, and thus make the access to the 

> valve difficult. I have tested all the brake lines with compressed 

> air during the tunnel work, but I don't remember testing the valve. 

> Does anyone know which valves may have problems and how to identify 

> such. Also what tests short of pumping brake fluid under pressure 

> would reveal a defect (not really an option for me yet).

>

> Chris Hukill

>

> worlds slowest builder

>

> *  *

> *  *

> *  *

>

> *  *

> *  *

> http://www.matronic=================http://forums.matronics.com- List 

> Contribution Web generous nbsp; --> http://www.matronics.com/c=

> *  *

> <http://www.matronics.com/contribution>

> <http://www.matronics.com/contribution>

> *

> *  <http://www.matronics.com/contribution>

> <http://www.matronics.com/contribution>



 <http://www.matronics.com/contribution>

 *

 *

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

rv10free2fly(at)yahoo.com
Guest

Posted: Thu Sep 01, 2011 3:58 pm Post subject: parking brake valve

Guys, what is the maximum air pressure that the brake lines and parking brake valve should be tested at please?

  

 I'm nearing that stage.

  

 Kind regards

  

 Patrick Pulis

 Adelaide, South Australia



 [quote][b]

jdriggs49(at)msn.com
Guest

Posted: Thu Sep 01, 2011 4:35 pm Post subject: parking brake valve

That reminds me of the last time I was out in SoCal visiting our youngest daughter and husband. We were getting ready to fly out of Redlands and I was prepping the plane when a guy hollered at me to help him. When I got over there he was trying to chock his 172 with his left foot. He asked me to hold the plane while he ran inside and took a leak. He looked desperate so I was happy to help him. When he came back I asked him if the parking brake was working. He really didn't even know what I was talking about. He said it was his first long XC and back in Carlsbad they never used a parking brake as it was flat. He was amazed to see there actually was a brake. 

Date: Thu, 1 Sep 2011 17:56:17 -0400

From: Mauledriver(at)nc.rr.com

To: rv10-list(at)matronics.com

Subject: Re: RV10-List: parking brake valve

                     Some would point out that chocks are what's required.  Arguable.  I     chose a parking brake, but I'm sick of the leak.

     Bill "a piece of Steelhead finally killed the brake fluid taste in     my mouth" Watson

     On 9/1/2011 3:36 PM, Gordon Anderson wrote:     [quote]                      .ExternalClass p.ecxMsoNormal, .ExternalClass li.ecxMsoNormal, .ExternalClass div.ecxMsoNormal {margin-bottom:.0001pt;font-size:12.0pt;font-family:"Times New Roman","serif";color:black;} .ExternalClass a:link, .ExternalClass span.ecxMsoHyperlink {color:blue;text-decoration:underline;} .ExternalClass a:visited, .ExternalClass span.ecxMsoHyperlinkFollowed {color:purple;text-decoration:underline;} .ExternalClass pre {margin-bottom:.0001pt;font-size:10.0pt;font-family:"Courier New";color:black;} .ExternalClass span.ecxHTMLPreformattedChar {font-family:Consolas;color:black;} .ExternalClass span.ecxEmailStyle19 {font-family:"Calibri","sans-serif";color:#1F497D;} .ExternalClass .ecxMsoChpDefault {font-size:10.0pt;} (at)page Section1 {size:612.0pt 792.0pt;} .ExternalClass div.ecxSection1 {page:Section1;}                  

Our             local airport has a sloping ramp by the fuel pumps.  Last             year I was waiting behind a Diamond Twin Star to fuel up             whilst the owner had             wandered off somewhere.  As the DA-42 started to roll             backwards I ran over             and stuck my foot behind the main tire when the tail was             only about 2ft away             from the brick hangar wall.          

5             minutes later the owner turns up and asks me what the f!?*             I’m             doing hanging around underneath his plane.         

Since             then I believe firmly in parking brakes.  Does a -10             really not roll that well?         

Gordon             Anderson         

#41015             (reinforcing wingtip nutplate holes)         

From:                 [url=mailto:owner-rv10-list-server(at)matronics.com]owner-rv10-list-server(at)matronics.com[/url]                 [[url=mailto:owner-rv10-list-server(at)matronics.com]mailto:owner-rv10-list-server(at)matronics.com[/url]] On                   Behalf Of Bill Watson

                 Sent: 01 September 2011 17:54

                 To: [url=mailto:rv10-list(at)matronics.com]rv10-list(at)matronics.com[/url]

                 Subject: Re: RV10-List: parking brake valve           

At this point, I'm thinking that  the PV-1           design is           subject to leaks unless the factory has done the mod to insert           O-rings on the           fittings leading to the master cylinders.  That's what I           gathered from the           list, and from talking to a guy at Matco.  Assuming the leak           is in the           'front' or master cylinder side, they will take it back, do           the mod, and send           it back to me.

           It is a PITA.  I'm flying right now with fluid weeping from           the device           everytime I use the brakes.  Run-up is the worse.  I did           attempt to           torque the fittings down harder to no avail.  To remove the           device is to           stop flying ((at) 10hours!!).  

           I'm getting ready  to replace it with a bracket that should           support all 4           fittings at least long enough to get the factory mod.  In           essence, all I'm           doing is returning to the orginal factory design.  So, I'll           drain all the           fluid, install bracket, refill and bleed, then return the unit           for           modification, then drain again, re-install brake, refill and           bleed. It might be           the perfect opportunity to use some of the super high temp           fluid.... or not.

           I'd talk to Matco and see if they will do the mod independent           of whether it           leaks.  That would save the awkward, after-first-flight           operation I'm           doing right now.

           Or just drop the dime and get their new one.

           Or best of all, as my Tech Counselor expounded on when I           showed him the brake           additions, "I don't believe in parking brakes.  You can't           trust them           overnight, they can leak, etc, I wouldn't put one on there if           it was my           plane". He's batting .999 so far.

           The main reason I chose to put it on there is my experience           with my tailwheel           Maule.  A smooth ramp with a little slope, some wind, or some           prop blast           and the thing will be rolling.  It's not the same with the           '10.  I           mainly need a good rudder lock and a rear panel bracket for my           Bogy Bar like           Dave S. has.

           Bill "starting to like the taste of brake fluid, not!" Watson

           On 9/1/2011 9:49 AM, Chris Hukill wrote:                     

I               read with interest about the folks that had leakage of               their Matco PV-1 valve.               I bought mine from Vans back in 06 and wonder what vintage               of these valves have               problems. I am about to close up the forward section of               the fuselage, and thus               make the access to the valve difficult. I have tested all               the brake lines with               compressed air during the tunnel work, but I don't               remember testing the valve.               Does anyone know which valves may have problems and how to               identify such. Also               what tests short of pumping brake fluid under pressure               would reveal a defect               (not really an option for me yet).         

Chris               Hukill         

worlds slowest               builder         

          	  Quote: 	

           	  Quote: 	

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[b]

pitts_pilot(at)bellsouth.
Guest

Posted: Thu Sep 01, 2011 6:26 pm Post subject: parking brake valve

The brake system from the master cylinders to the brake puck will     see far greater pressures than you'll possibly get with your     compressor.

     Linn

     

     On 9/1/2011 7:55 PM, Patrick Pulis wrote:     [quote]                Guys, what is             the maximum air pressure that the brake lines and parking             brake valve should be tested at please?

          

         I'm nearing             that stage.

          

         Kind regards

          

         Patrick Pulis

         Adelaide,             South Australia

       

        	  Quote: 	
		  

	
     [b]

dave.saylor.aircrafters(a
Guest

Posted: Thu Sep 01, 2011 6:41 pm Post subject: parking brake valve

We did some troubleshooting on a brake system a few months ago that

included putting a pressure gauge at the caliper inlet.  We were

seeing around 800 PSI at full pedal force.



Dave Saylor

AirCrafters

140 Aviation Way

Watsonville, CA 95076

831-722-9141 Shop

831-750-0284 Cell



On Thu, Sep 1, 2011 at 4:55 PM, Patrick Pulis <rv10free2fly(at)yahoo.com.au> wrote:

 	  Quote: 	
		   Guys, what is the maximum air pressure that the brake lines and parking

 brake valve should be tested at please?



 I'm nearing that stage.



 Kind regards



 Patrick Pulis

 Adelaide, South Australia

rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Fri Sep 02, 2011 7:15 am Post subject: Re: parking brake valve

Thanks Dave...I can put my 1000 psi gage away as I was going to test that. 



Patrick, 

If i was going to air/nitrogen pressure test the system, I would disconnect lines at tee ftg on back side of reservoir as I would not want to blow it up. Install a tee ftg between the two open ends and connect to a regulated air/nitrogen source. Pressurize to 100 psi with an accurate gage attached. Shut everything off and monitor pres gage for a few hours. If pres goes down a lb or so then stabilizes you are ok. If it continues to drop get out your soap bubble solution. Make sure you did not use ez turn/fuel lube as it may not withstand the 800 psi later on. I may just bleed them and pass on the pres test, have not decided.

_________________
Wayne G.

fdombroski

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

Posted: Sat Sep 03, 2011 6:01 am Post subject: Re: parking brake valve

My Valve was purchased from Vans at about the same time.  It was leaking from the shaft seal, especially when under pressure (parking brake set).  I had to remove it and send it back for replacement.  No cost, but a pain in the back! 



I used some couplers to plumb my brake lines together so I could fly while it was out for repair.  Good luck

_________________
Frank Dombroski
Multiple Offender RV-8, 7A, 10 x 2
RV-10 2.0 N46VT 2015
KSMQ Somerset Airport NJ

iansdad

Joined: 06 Aug 2011
Posts: 14

Posted: Mon Sep 05, 2011 7:38 am Post subject: parking brake valve

Anyone know if someone sells a mounting bracket for the Matco parking brake valve?  I am a poor designer and even worse at fabricating so looking for short cut.

 [quote][b]

sean(at)stephensville.com
Guest

Posted: Mon Sep 05, 2011 7:59 am Post subject: parking brake valve

AirWard does...



http://www.airward.com/amelia/search.asp?store=airward&action=Search&ShowDetails=True&ShowImages=True&cat=10000006&subcat_10000003=10000006



-Sean #40303 (painting fuse interior)



On 9/4/11 12:36 PM, Roxanne Lefever wrote:

 	  Quote: 	
		  

 Anyone know if someone sells a mounting bracket for the Matco parking 

 brake valve?  I am a poor designer and even worse at fabricating so 

 looking for short cut.



 *

 *

hotwheels

Joined: 01 Jun 2007
Posts: 240

Posted: Wed Sep 21, 2011 9:47 am Post subject: Re: parking brake valve

Thanks for posting this. I pulled my PV-1 out and sent it in for re-work. The timing was perfect as my panel isn't yet in place. Re-work was simply adding two countersinks to allow the gaskets to seal better. I don't know how the change will work as I'm not yet using the valve.



Cheers,

Jay

Mauledriver(at)nc.rr.com
Guest

Posted: Wed Sep 21, 2011 10:21 am Post subject: parking brake valve

Glad to hear that.  I put mine back in and re-bled the system.  Haven't 

put in service yet but no leaks so far.



Frankly, I'm still not clear on where the countersinks were done but no 

matter.



Bill



On 9/21/2011 1:47 PM, jayb wrote:

 	  Quote: 	
		   



 Thanks for posting this. I pulled my PV-1 out and sent it in for re-work. The timing was perfect as my panel isn't yet in place. Re-work was simply adding two countersinks to allow the gaskets to seal better. I don't know how the change will work as I'm not yet using the valve.



 Cheers,

 Jay





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