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CJ brake adjustment

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jonboede(at)hotmail.com
Guest

Posted: Sun Nov 09, 2008 8:54 pm Post subject: CJ brake adjustment

I have a CJ that doesn't like to turn left.



Tested brake pressure at both left and right wheels = about 150 psi.



Changed brake drums and that seemed to help.  Was going to change brake pucks but in looking at the current ones C the new ones were exactly the same thickness.



Is there an adjustment to make the brake grab better?  Does this mean that the left bladder is going out?  How does one check that?



Thanks C

jon

  [quote][b]

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dougsappllc(at)gmail.com
Guest

Posted: Mon Nov 10, 2008 9:51 am Post subject: CJ brake adjustment

Jon,

 You most likley have a problem in your QS2 valve.  Bladders can be checked by submersion in water to check if it's leaking.  I't not impossible that you have a leaking bladder but If you did it would be the first one I have seen.  My money is on the hunch that you have a QS2 valve which needs to be replaced or overhauled.  

   

 Please contact me off list if you need to order parts.

  

 Always Yakin,

 Doug

 On Sun, Nov 9, 2008 at 8:54 PM, Jon Boede <jonboede(at)hotmail.com (jonboede(at)hotmail.com)> wrote:

  	  Quote: 	
		   I have a CJ that doesn't like to turn left.



Tested brake pressure at both left and right wheels = about 150 psi.



Changed brake drums and that seemed to help.  Was going to change brake pucks but in looking at the current ones, the new ones were exactly the same thickness.

 

Is there an adjustment to make the brake grab better?  Does this mean that the left bladder is going out?  How does one check that?



Thanks,

jon

 	  Quote: 	
		  



	


	


-- 

Always Yakin,

Doug Sapp

Phone 509-826-4610

Fax 509-826-3644

  [quote][b]

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cjpilot710(at)aol.com
Guest

Posted: Mon Nov 10, 2008 9:52 am Post subject: CJ brake adjustment

In a message dated 11/9/2008 11:55:14 P.M. Eastern Standard Time,  jonboede(at)hotmail.com writes:

  

 jon,

  

 You may have a bladder leaking.

  

 Pappy

  

  	  Quote: 	
		  I have a    CJ that doesn't like to turn left.



Tested brake pressure at both left    and right wheels = about 150 psi.



Changed brake drums and that seemed    to help.  Was going to change brake pucks but in looking at the current    ones, the new ones were exactly the same thickness.



Is there an    adjustment to make the brake grab better?  Does this mean that the left    bladder is going out?  How does one check that?



Thanks,

jon

 	  Quote: 	
		  



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dsavarese0812(at)bellsout
Guest

Posted: Mon Nov 10, 2008 2:50 pm Post subject: CJ brake adjustment

Doug,

 If he has equal pressure of 150 PSI on both  sides, why would the brake differential valve be the problem?   

  

 I'm wondering if a there was/is a bad rear grease  seal on the drum which allowed the grease from the rear bearing to be slung out  over the brake pucks.  If that's the case and I have seen this before, the  brake pucks will not grab as well on the one side.  Evidence of the grease  would be all over the backing plate behind the drum.  Remove the pucks and  clean them in avgas.   The avgas dries rapidly and leaves no oily film  on the pucks.  Reinstall the pucks and lightly sand them with 60-80 grit  sandpaper.  Reassemble the wheel assembly and try it out.

 Dennis

  

 [quote]   ---

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petervs(at)knology.net
Guest

Posted: Mon Nov 10, 2008 3:10 pm Post subject: CJ brake adjustment

I had this same problem and it was exactly what Dennis described. I was missing the inner felt grease seals and the pucks were contaminated.  

   

Beware, the brakes will be awesome if this was your problem, so go easy on the brake lever the first few flights or you’ll be flat spotting tires.  

   

Pete  

     

                                 

                __|__   

     __|__   ----=(*)=----   __|__

 ----=(*)=----   __|__   ----=(*)=----  

            ----=(*)=----  

  

       

From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of A. Dennis Savarese

 Sent: Monday, November 10, 2008 4:50 PM

 To: yak-list(at)matronics.com

 Subject: Re: CJ brake adjustment  

  

  

     

Doug,  

    

If he has equal pressure of 150 PSI on both sides, why would the brake differential valve be the problem?    

    

   

    

I'm wondering if a there was/is a bad rear grease seal on the drum which allowed the grease from the rear bearing to be slung out over the brake pucks.  If that's the case and I have seen this before, the brake pucks will not grab as well on the one side.  Evidence of the grease would be all over the backing plate behind the drum.  Remove the pucks and clean them in avgas.   The avgas dries rapidly and leaves no oily film on the pucks.  Reinstall the pucks and lightly sand them with 60-80 grit sandpaper.  Reassemble the wheel assembly and try it out.  

    

Dennis  

    

   

   	  Quote: 	
		      

----- Original Message -----   

    

From: doug sapp (dougsappllc(at)gmail.com)   

    

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

    

Sent: Monday, November 10, 2008 11:50 AM  

    

Subject: Re: CJ brake adjustment  

    

   

    

Jon,  

    

You most likley have a problem in your QS2 valve.  Bladders can be checked by submersion in water to check if it's leaking.  I't not impossible that you have a leaking bladder but If you did it would be the first one I have seen.  My money is on the hunch that you have a QS2 valve which needs to be replaced or overhauled.    

    

   

    

Please contact me off list if you need to order parts.  

    

   

    

Always Yakin,  

    

Doug  

    

On Sun, Nov 9, 2008 at 8:54 PM, Jon Boede <jonboede(at)hotmail.com (jonboede(at)hotmail.com)> wrote:    

I have a CJ that doesn't like to turn left.

 

 Tested brake pressure at both left and right wheels = about 150 psi.

 

 Changed brake drums and that seemed to help.  Was going to change brake pucks but in looking at the current ones, the new ones were exactly the same thickness.

 

 Is there an adjustment to make the brake grab better?  Does this mean that the left bladder is going out?  How does one check that?

 

 Thanks,

 jon   	  Quote: 	
		    	


  

  



  

 -- 

 Always Yakin,

 Doug Sapp

 Phone 509-826-4610

 Fax 509-826-3644   	  Quote: 	
		    href="http://www.matronics.com/contribution">http://www.matronics.com/chref="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-Listhref="http://forums.matronics.com">http://forums.matronics.com 	
   	
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        [quote][b]

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dougsappllc(at)gmail.com
Guest

Posted: Mon Nov 10, 2008 3:25 pm Post subject: CJ brake adjustment

Sometimes the QS2-09 rubber seal will devolop a problem and become intermitant.  But you do have a point and this bad grease seal (or lack of)  should be checked out.  Back in the days before I had these seals in constant stock many guys either went without or made their own.

   

 Doug

 On Mon, Nov 10, 2008 at 2:49 PM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:

 [quote]  Doug,

 If he has equal pressure of 150 PSI on both sides, why would the brake differential valve be the problem?  

  

 I'm wondering if a there was/is a bad rear grease seal on the drum which allowed the grease from the rear bearing to be slung out over the brake pucks.  If that's the case and I have seen this before, the brake pucks will not grab as well on the one side.  Evidence of the grease would be all over the backing plate behind the drum.  Remove the pucks and clean them in avgas.   The avgas dries rapidly and leaves no oily film on the pucks.  Reinstall the pucks and lightly sand them with 60-80 grit sandpaper.  Reassemble the wheel assembly and try it out.

  Dennis

  

 [quote] ---

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jonboede(at)hotmail.com
Guest

Posted: Mon Nov 10, 2008 3:36 pm Post subject: CJ brake adjustment

I changed out the felt seals when I changed the drums.  Didn't change the pucks.  I suppose what we'll do is change the pucks and dump all the old pucks in a bucket of #1 aviation solvent (that's 100LL for those in Rio Linda) and see if that fixes things.  



Anybody have a brake bladder they'd like to sell?  Doug is out of stock right now.



Jon



Date: Mon C 10 Nov 2008 15:18:16 -0800

From: dougsappllc(at)gmail.com

To: yak-list(at)matronics.com

Subject: Re: CJ brake adjustment



Sometimes the QS2-09 rubber seal will devolop a problem and become intermitant.  But you do have a point and this bad grease seal (or lack of)  should be checked out.  Back in the days before I had these seals in constant stock many guys either went without or made their own.

   

 Doug

 On Mon C Nov 10 C 2008 at 2:49 PM C A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:

 [quote]  Doug C

 If he has equal pressure of 150 PSI on both sides C why would the brake differential valve be the problem?  

  

 I'm wondering if a there was/is a bad rear grease seal on the drum which allowed the grease from the rear bearing to be slung out over the brake pucks.  If that's the case and I have seen this before C the brake pucks will not grab as well on the one side.  Evidence of the grease would be all over the backing plate behind the drum.  Remove the pucks and clean them in avgas.   The avgas dries rapidly and leaves no oily film on the pucks.  Reinstall the pucks and lightly sand them with 60-80 grit sandpaper.  Reassemble the wheel assembly and try it out.

  Dennis

  

 [quote] ---

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maggieannya

Joined: 11 Nov 2008
Posts: 10

Posted: Tue Nov 11, 2008 2:14 am Post subject: Re: CJ brake adjustment

This is Maggie from Xi'an LiChuang Electronics,

We have the hot offer parts as following:

DZ-5 spark plugs,

LS2-10 Brake drums,

LS2-13 Brake Ring,

LS2-70 brake plate 

CQ-409 brake chambers 

If you have any other requirement,pls feel free to contact me.

Thank you very much.

Yours sincerely,

Maggie

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_________________
This is Maggie from Xi'an ATO Electronics.
We are Chinese aircraft parts trader in China

yakplt(at)yahoo.com
Guest

Posted: Tue Nov 11, 2008 8:05 pm Post subject: CJ brake adjustment

A common problem with older Pilots. Rubber underwear helps to conceal this embarrassing problem, that and not turning left.    

   From: "cjpilot710(at)aol.com" <cjpilot710(at)aol.com>

To: yak-list(at)matronics.com

Sent: Monday, November 10, 2008 12:52:24 PM

Subject: Re: CJ brake adjustment

  In a message dated 11/9/2008 11:55:14 P.M. Eastern Standard Time, jonboede(at)hotmail.com writes:

 jon,

 You may have a bladder leaking.

 Pappy

  	  Quote: 	
		  I have a CJ that doesn't like to turn left.

Tested brake pressure at both left and right wheels = about 150 psi.

Changed brake drums and that seemed to help.  Was going to change brake pucks but in looking at the current ones, the new ones were exactly the same thickness.

Is there an adjustment to make the brake grab better?  Does this mean that the left bladder is going out?  How does one check that?

Thanks,

jon

 	  Quote: 	
		      ://www.matronics.com/contribution">http://www.matronics.com/contribution  ="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List  .matronics.com/">http://forums.matronics.com  	

   [quote][b]

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