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YAK 50 brakes

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gord(at)thedampub.ca
Guest

Posted: Sun May 22, 2016 4:01 am Post subject: YAK 50 brakes

I am looking for a solution to a brake problem.  I cannot get enough pressure on the brake handle to hold the aircraft during the engine runup . The airplane creeps ahead.  We tried adjusting the end of the boden cable but that just puts the brakes on without squeezing the handle. It seems like the pucks are slipping so maybe they need replacement or roughing up?  Any ideas?  



Thanks  



Gord Price

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dsavarese0812(at)bellsout
Guest

Posted: Sun May 22, 2016 7:06 am Post subject: YAK 50 brakes

A couple of things Gordo.  First you should remove the hubs and confirm the felt grease seals are in place on the inside of the hub.  If the grease seal is broken or missing, grease from the bearings is being "spashed" all over the brakes and the drum area.  Replace the felt grease seal.  Then clean the brake pads with avgas.  Let them dry.  Then scuff them up with 60 grit wet/dry sandpaper.  Do this on both mains.  If you don't know where the felt grease seals are, particularly the one on the back side of the hub, contact me off-list and I will do my best to "point" you to it.

Secondly, you may want to rebuild the brake reducing valve.  I have seen on several occasions the brake reducing valve was not outputing an adequate amount of pressure.  Doug Sapp, the CJ6 parts supplier, has the rebuilding kits.  It is 100% identical to the brake reducing valve on the Yak 50 and 52.  Doug also has the felt seals.

Dennis



       From: Gordon Price <gord(at)thedampub.ca>

 To: yak-list(at)matronics.com 

 Sent: Sunday, May 22, 2016 7:58 AM

 Subject: YAK 50 brakes

  

 

--> Yak-List message posted by: Gordon Price <gord(at)thedampub.ca (gord(at)thedampub.ca)>



I am looking for a solution to a brake problem.  I cannot get enough pressure on the brake handle to hold the aircraft during the engine runup . The airplane creeps ahead.  We tried adjusting the end of the boden cable but that just puts the brakes on without squeezing the handle. It seems like the pucks are slipping so maybe they need replacement or roughing up?  Any ideas?  



Thanks&n="http://forums.matronics.com/" target="_blank">http://forums.matronicsef="http://wiki.matronics.com/" target="_blank">http://wiki.matronics.c;                   -Matt Dralcontribution" target="_blank">http://www.matronics.com/contribution<b============

- The Matronics Yak-List Email Forum -

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dougsappllc(at)gmail.com
Guest

Posted: Mon May 23, 2016 6:02 am Post subject: YAK 50 brakes

Gorden,Just back from a few days off.

Give me a call at about 9am PST time and I'll try to help you through your brake problem.

Best,

Doug

On Sun, May 22, 2016 at 4:58 AM, Gordon Price <gord(at)thedampub.ca (gord(at)thedampub.ca)> wrote:

 	  Quote: 	
		  --> Yak-List message posted by: Gordon Price <gord(at)thedampub.ca (gord(at)thedampub.ca)>

 

 I am looking for a solution to a brake problem.Â  I cannot get enough pressure on the brake handle to hold the aircraft during the engine runup . The airplane creeps ahead.Â  We tried adjusting the end of the boden cable but that just puts the brakes on without squeezing the handle. It seems like the pucks are slipping so maybe they need replacement or roughing up?Â  Any ideas?

 

 Thanks

 

 Gord Price

 

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 List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?Yak-List

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 eferrer" target="_blank">http://forums.matronics.com

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 WIKI -

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 b Site -

 Â  Â  Â  Â  Â  -Matt Dralle, List Admin.

 rel="noreferrer" target="_blank">http://www.matronics.com/contribution

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gord(at)thedampub.ca
Guest

Posted: Thu May 26, 2016 11:05 am Post subject: YAK 50 brakes

Thanks Dennis,

There is lots of air from brake reducing valve.  We have decided to put on complete new brake assemblies and drums which we ordered from Doug Sapp.  



Who ever buys this airplane will have a very good airplane indeed.  In the meantime I will have excellent brakes, a vital part of a YAK 50.



Gord



 	  Quote: 	
		  On May 22, 2016, at 11:05 AM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:

A couple of things Gordo.  First you should remove the hubs and confirm the felt grease seals are in place on the inside of the hub.  If the grease seal is broken or missing, grease from the bearings is being "spashed" all over the brakes and the drum area.  Replace the felt grease seal.  Then clean the brake pads with avgas.  Let them dry.  Then scuff them up with 60 grit wet/dry sandpaper.  Do this on both mains.  If you don't know where the felt grease seals are, particularly the one on the back side of the hub, contact me off-list and I will do my best to "point" you to it.



Secondly, you may want to rebuild the brake reducing valve.  I have seen on several occasions the brake reducing valve was not outputing an adequate amount of pressure.  Doug Sapp, the CJ6 parts supplier, has the rebuilding kits.  It is 100% identical to the brake reducing valve on the Yak 50 and 52.  Doug also has the felt seals.



Dennis

       From: Gordon Price <gord(at)thedampub.ca (gord(at)thedampub.ca)> To: yak-list(at)matronics.com (yak-list(at)matronics.com)  Sent: Sunday, May 22, 2016 7:58 AM Subject: YAK 50 brakes  

 --> Yak-List message posted by: Gordon Price <gord(at)thedampub.ca (gord(at)thedampub.ca)>I am looking for a solution to a brake problem.  I cannot get enough pressure on the brake handle to hold the aircraft during the engine runup . The airplane creeps ahead.  We tried adjusting the end of the boden cable but that just puts the brakes on without squeezing the handle. It seems like the pucks are slipping so maybe they need replacement or roughing up?  Any ideas?  Thanks&n="http://forums.matronics.com/" target="_blank">http://forums.matronicsef="http://wiki.matronics.com/" target="_blank">http://wiki.matronics.c;                   -Matt Dralcontribution" target="_blank">http://www.matronics.com/contribution

- The Matronics Yak-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?Yak-List

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