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Need Master Cylinder Spring Info

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Daniel.Snow(at)wancdf.com
Guest

Posted: Wed May 30, 2007 7:47 am Post subject: Need Master Cylinder Spring Info

My brakes are sticking and I would like to install return springs on the

master cylinders.  Has anyone added springs, and if so, can you provide

details?



Thanks,



Daniel Snow

RV-9A, 34 Flight Test hours

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dennis.glaeser(at)eds.com
Guest

Posted: Wed May 30, 2007 12:20 pm Post subject: Need Master Cylinder Spring Info

I'm not flying yet, but decided to add 'helper' springs while I have

better access (top fwd skin not yet riveted).

I went to the aviation aisle of my hardware store and found springs that

were 3/8" ID and 3" long. 3.5" long would be better, but that was all

they had.  I stretched the springs a bit to get more 'help' at the end

of the stroke.  Another approach would be to either add washers, or a

short piece of tubing to compress the spring when the shaft is extended.

The ends of the springs had to be bent away a bit because they dragged

on the shaft, but once that was done, they slide easily.

I put a washer down first, then slid on the spring. I was going to put a

washer at the top as well, but it interfered with the mount. I wish I

had thought of doing this before the rudder pedals were in the airplane,

and I don't envy you having to do it on a finished airplane.



Dennis Glaeser

RV-7A - starting to paint, waiting for my engine

------------------------------------------------------------------------

---

My brakes are sticking and I would like to install return springs on the

master cylinders.  Has anyone added springs, and if so, can you provide

details?



Thanks,



Daniel Snow

RV-9A, 34 Flight Test hours

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Mark Phillips in TN

Joined: 10 Jan 2006
Posts: 431
Location: Columbia, TN

Posted: Wed May 30, 2007 12:38 pm Post subject: Need Master Cylinder Spring Info

In a message dated 5/30/2007 10:49:58 AM Central Daylight Time, Daniel.Snow(at)wancdf.com writes:

  	  Quote: 	
		  Has anyone added springs, and if so, can you provide

details? 	


 >>>

  

 Here's what I did:

  

 http://websites.expercraft.com/n51pw/index.php?q=log_entry&log_id=17458

  

 ...and by the way- I just added the above log entry to my Expercraft website after not even looking at it in over a year, and even with a new format was very easy- Riggen is a genius and I highly recommend his service!  (unsolicited, uncompensated and unconditional support for Expercraft- great stuff- Thanks again Rob!)

  

 From The PossumWorks in TN

 Mark



See what's free at AOL.com. 

  [quote][b]

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_________________
From The PossumWorks...

rv9jim(at)juno.com
Guest

Posted: Wed May 30, 2007 1:03 pm Post subject: Need Master Cylinder Spring Info

Dennis,

        Use a "set collar" on the top to provide the tension you want.  I

did it to my brake cyl on both sides.  check out my web site for the

details.  If you can not find it there, I can e-mail you the pix I have

on how I did it.   You should use a flanged oillite bushing on the bottom

so the spring rides on it rather than the topof the cyl. 



www.expercraft.com/jimn

 

Jim Nelson

RV9-A  

N15JN



95% done and 50% to go

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seipel(at)seznam.cz
Guest

Posted: Wed May 30, 2007 1:29 pm Post subject: Need Master Cylinder Spring Info

I used the following from McMaster Carr (www.mcmaster.com):



1  6389K625   Nylon Bearing Flanged, for 3/8" Shaft Dia, 1/2" Od, 3/8" 

Length, Packs of 5    $1.71    

1  9657K115   Steel Compression Spring Znc-Pltd Spring-Tempered, 3" L, 

1/2" Od, .047" Dia, Packs of  12    $5.29       

4  9946K13     Aluminum Set Screw Shaft Collar 3/8" Bore, 3/4" Outside 

Diameter, 3/8" Width     $1.82 



for a total cost of about $19 after shipping.  Picture is attached.  Not 

flying yet, so I don't know how well it works.



PJ Seipel

RV-10 #40032

Snow wrote:

 	  Quote: 	
		   



 My brakes are sticking and I would like to install return springs on the

 master cylinders.  Has anyone added springs, and if so, can you provide

 details?



 Thanks,



 Daniel Snow

 RV-9A, 34 Flight Test hours

- The Matronics RV-List Email Forum -

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:

http://www.matronics.com/Navigator?RV-List

Mark Phillips in TN

Joined: 10 Jan 2006
Posts: 431
Location: Columbia, TN

Posted: Wed May 30, 2007 1:34 pm Post subject: Need Master Cylinder Spring Info

In a message dated 5/30/2007 3:23:11 PM Central Daylight Time, dennis.glaeser(at)eds.com writes:

  	  Quote: 	
		  I wish I

had thought of doing this before the rudder pedals were in the airplane,

and I don't envy you having to do it on a finished airplane. 	


 Man, have you got THAT right!  

  

 Mark do not archive



See what's free at AOL.com. 

  [quote][b]

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_________________
From The PossumWorks...

garrys(at)tampabay.rr.com
Guest

Posted: Wed May 30, 2007 2:06 pm Post subject: Need Master Cylinder Spring Info

I agree with Jim Nelson's post.  My brakes were dragging too, and Jim fixed 

me up with the Oillite bushings and set collars.  The springs can be found 

at most major hardware stores.  Works great!  Check out Jim's website.



Garry Stout

RV-7A  Tampa Florida

---

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