Matronics Email Lists :: View topic - leaking brake calipers

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

leaking brake calipers

Matronics Email Lists Forum Index -> RV10-List

View previous topic :: View next topic

Author Message

arplnplt(at)gmail.com
Guest

Posted: Sat Aug 04, 2012 7:31 pm Post subject: leaking brake calipers

I flew into OSH and landed on runway 9 last Friday during the show.  I had to taxi quite a distance on turf to get to the HBP area with the other 10's.  As I got closer to the parking area, i noticed my brakes getting spongy.

I don't think I ride the brakes much at all but taxiing on the grass made me tap dance on them quite a bit.  I few back to KUES that evening and found a leaking right caliper.  Opened it up and found the o-ring pretty worn on one side, almost flat.  The wall looked good with no sign of scoring or scratches.  I replaced the o-ring but have not tested the brakes yet.  I also found the left caliper leaking slightly as well.  Have not inspected it yet.  The plane has about 170 hours.  Had no problems prior to this flight.

The question is, would heating up the brakes cause the o-rings to fail?



Dave Leikam

rv10pro(at)gmail.com
Guest

Posted: Sat Aug 04, 2012 7:48 pm Post subject: leaking brake calipers

Yes, and if your running H-5606 with Fiberglas pants you can support more activity than you did.



John



P.S.  carry an extinguisher



David Leikam <arplnplt(at)gmail.com> wrote:



 	  Quote: 	
		  



I flew into OSH and landed on runway 9 last Friday during the show.  I had to taxi quite a distance on turf to get to the HBP area with the other 10's.  As I got closer to the parking area, i noticed my brakes getting spongy.

I don't think I ride the brakes much at all but taxiing on the grass made me tap dance on them quite a bit.  I few back to KUES that evening and found a leaking right caliper.  Opened it up and found the o-ring pretty worn on one side, almost flat.  The wall looked good with no sign of scoring or scratches.  I replaced the o-ring but have not tested the brakes yet.  I also found the left caliper leaking slightly as well.  Have not inspected it yet.  The plane has about 170 hours.  Had no problems prior to this flight.

The question is, would heating up the brakes cause the o-rings to fail?



Dave Leikam

kdbelue(at)charter.net
Guest

Posted: Sat Aug 04, 2012 8:08 pm Post subject: leaking brake calipers

Yes, I had the same problem. Changed the oring to viton - I always use the mil-h-83282 fluid. I'm sure I would've had a fire with 5606 fluid.....



Sent from my iPhone



On Aug 4, 2012, at 10:30 PM, David Leikam <arplnplt(at)gmail.com> wrote:



 	  Quote: 	
		   

 

 I flew into OSH and landed on runway 9 last Friday during the show.  I had to taxi quite a distance on turf to get to the HBP area with the other 10's.  As I got closer to the parking area, i noticed my brakes getting spongy.

 I don't think I ride the brakes much at all but taxiing on the grass made me tap dance on them quite a bit.  I few back to KUES that evening and found a leaking right caliper.  Opened it up and found the o-ring pretty worn on one side, almost flat.  The wall looked good with no sign of scoring or scratches.  I replaced the o-ring but have not tested the brakes yet.  I also found the left caliper leaking slightly as well.  Have not inspected it yet.  The plane has about 170 hours.  Had no problems prior to this flight.

 The question is, would heating up the brakes cause the o-rings to fail?

 

 Dave Leikam

Kellym

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

Posted: Sat Aug 04, 2012 8:12 pm Post subject: leaking brake calipers

Do you happen to have the viton part number for the Cleveland calipers?



On 8/4/2012 9:07 PM, Kevin Belue wrote:

 	  Quote: 	
		   



 Yes, I had the same problem. Changed the oring to viton - I always use the mil-h-83282 fluid. I'm sure I would've had a fire with 5606 fluid.....



 Sent from my iPhone



 On Aug 4, 2012, at 10:30 PM, David Leikam <arplnplt(at)gmail.com> wrote:



> 

>

> I flew into OSH and landed on runway 9 last Friday during the show.  I had to taxi quite a distance on turf to get to the HBP area with the other 10's.  As I got closer to the parking area, i noticed my brakes getting spongy.

> I don't think I ride the brakes much at all but taxiing on the grass made me tap dance on them quite a bit.  I few back to KUES that evening and found a leaking right caliper.  Opened it up and found the o-ring pretty worn on one side, almost flat.  The wall looked good with no sign of scoring or scratches.  I replaced the o-ring but have not tested the brakes yet.  I also found the left caliper leaking slightly as well.  Have not inspected it yet.  The plane has about 170 hours.  Had no problems prior to this flight.

> The question is, would heating up the brakes cause the o-rings to fail?

>

> Dave Leikam

>

>

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

kdbelue(at)charter.net
Guest

Posted: Sat Aug 04, 2012 8:22 pm Post subject: leaking brake calipers

Not right now, it's at the hangar. I can get it tomorrow if no one else replies....



Sent from my iPhone



On Aug 4, 2012, at 11:11 PM, Kelly McMullen <kellym(at)aviating.com> wrote:



 	  Quote: 	
		   

 

 Do you happen to have the viton part number for the Cleveland calipers?

 

 On 8/4/2012 9:07 PM, Kevin Belue wrote:

> 

> 

> Yes, I had the same problem. Changed the oring to viton - I always use the mil-h-83282 fluid. I'm sure I would've had a fire with 5606 fluid.....

> 

> Sent from my iPhone

> 

> On Aug 4, 2012, at 10:30 PM, David Leikam <arplnplt(at)gmail.com> wrote:

> 

>> 

>> 

>> I flew into OSH and landed on runway 9 last Friday during the show.  I had to taxi quite a distance on turf to get to the HBP area with the other 10's.  As I got closer to the parking area, i noticed my brakes getting spongy.

>> I don't think I ride the brakes much at all but taxiing on the grass made me tap dance on them quite a bit.  I few back to KUES that evening and found a leaking right caliper.  Opened it up and found the o-ring pretty worn on one side, almost flat.  The wall looked good with no sign of scoring or scratches.  I replaced the o-ring but have not tested the brakes yet.  I also found the left caliper leaking slightly as well.  Have not inspected it yet.  The plane has about 170 hours.  Had no problems prior to this flight.

>> The question is, would heating up the brakes cause the o-rings to fail?

>> 

>> Dave Leikam

>> 

>> 

>> 

>> 

> 

> 

> 

>

Tim Olson

Joined: 25 Jan 2007
Posts: 2881

Posted: Sat Aug 04, 2012 8:44 pm Post subject: leaking brake calipers

Dave, you definitely want the high-temp brake fluid (cheap

at Skygeek.com), and the viton o-rings. They'll hold up

much better.  On my site, I have the viton part number on

one of my write-ups:



http://www.myrv10.com/N104CD/maintenance/20080503/index.html



Just search Viton on the page and you find:



The Viton o-rings are M83248/1-224  V-75



I bought some additional ones from McMaster Carr.

1201T856	MIL-Spec Viton(R) Fluoroelastomer O-Ring,

		AS568A Dash Number 224, packs of 10



I also got these as spares...I think these were for the prop:

4198T265	MIL-Spec Buna-N O-Ring, A75 Durometer,

		AS568A Dash Number 228, packs of 25



Good luck,

Tim



On 8/4/2012 11:11 PM, Kelly McMullen wrote:

 	  Quote: 	
		   



 Do you happen to have the viton part number for the Cleveland calipers?




	




 	  Quote: 	
		  >

> Sent from my iPhone

>

> On Aug 4, 2012, at 10:30 PM, David Leikam <arplnplt(at)gmail.com> wrote:

>

>> 

>>

>> I flew into OSH and landed on runway 9 last Friday during the show.

>> I had to taxi quite a distance on turf to get to the HBP area with

>> the other 10's.  As I got closer to the parking area, i noticed my

>> brakes getting spongy.

>> I don't think I ride the brakes much at all but taxiing on the grass

>> made me tap dance on them quite a bit.  I few back to KUES that

>> evening and found a leaking right caliper.  Opened it up and found

>> the o-ring pretty worn on one side, almost flat.  The wall looked

>> good with no sign of scoring or scratches.  I replaced the o-ring but

>> have not tested the brakes yet.  I also found the left caliper

>> leaking slightly as well.  Have not inspected it yet.  The plane has

>> about 170 hours.  Had no problems prior to this flight.

>> The question is, would heating up the brakes cause the o-rings to fail?

>>

>> Dave Leikam

>>

arplnplt(at)gmail.com
Guest

Posted: Sun Aug 05, 2012 5:03 am Post subject: leaking brake calipers

Thanks!  I'll get the viton seals and give them a try.  I use Amsoil ATF fluid.  https://www.amsoil.com/storefront/ATF.aspx?zo=1785021ww.amsoil.com/storefront/A  

And I carry a Halon extinguisher.  170 hours and the pads look OK although I just ordered Rapco pads, rotors and desser tires.



Dave Leikam



On Aug 4, 2012, at 10:30 PM, David Leikam wrote:



 	  Quote: 	
		   

 

 I flew into OSH and landed on runway 9 last Friday during the show.  I had to taxi quite a distance on turf to get to the HBP area with the other 10's.  As I got closer to the parking area, i noticed my brakes getting spongy.

 I don't think I ride the brakes much at all but taxiing on the grass made me tap dance on them quite a bit.  I few back to KUES that evening and found a leaking right caliper.  Opened it up and found the o-ring pretty worn on one side, almost flat.  The wall looked good with no sign of scoring or scratches.  I replaced the o-ring but have not tested the brakes yet.  I also found the left caliper leaking slightly as well.  Have not inspected it yet.  The plane has about 170 hours.  Had no problems prior to this flight.

 The question is, would heating up the brakes cause the o-rings to fail?

 

 Dave Leikam

Kellym

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

Posted: Sun Aug 05, 2012 7:22 am Post subject: leaking brake calipers

Hmm,

While the Amsoil is a hydraulic fluid, I don't know that it tells you 

anything about its suitability for aircraft brakes. Things like 

compatibility with seals, flash point, viscosity vs temp range.

Given that the Royco 782 that is aircraft brake fluid, and is compatible 

with all other aircraft brake fluids, is within $1 of the same price for 

a quart, I question this diversion to non-aircraft fluid.  When you leak 

some and need to top off at an FBO, will you know how 5606 that they 

have on hand will react with the Amsoil? TheMIL-PRF-83282D assures that 

the Royco will be compatible, only losing some of its higher flash 

point, if mixed.

I can't imagine why you would need rotors before you have a few thousand 

hours on the plane.

Kelly

On 8/5/2012 6:02 AM, David Leikam wrote:

 	  Quote: 	

 Thanks!  I'll get the viton seals and give them a try.  I use Amsoil ATF fluid.  https://www.amsoil.com/storefront/ATF.aspx?zo=1785021ww.amsoil.com/storefront/A

 And I carry a Halon extinguisher.  170 hours and the pads look OK although I just ordered Rapco pads, rotors and desser tires.

 Dave Leikam

 On Aug 4, 2012, at 10:30 PM, David Leikam wrote:

> 

>

> I flew into OSH and landed on runway 9 last Friday during the show.  I had to taxi quite a distance on turf to get to the HBP area with the other 10's.  As I got closer to the parking area, i noticed my brakes getting spongy.

> I don't think I ride the brakes much at all but taxiing on the grass made me tap dance on them quite a bit.  I few back to KUES that evening and found a leaking right caliper.  Opened it up and found the o-ring pretty worn on one side, almost flat.  The wall looked good with no sign of scoring or scratches.  I replaced the o-ring but have not tested the brakes yet.  I also found the left caliper leaking slightly as well.  Have not inspected it yet.  The plane has about 170 hours.  Had no problems prior to this flight.

> The question is, would heating up the brakes cause the o-rings to fail?

>

> Dave Leikam

>

>

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

arplnplt(at)gmail.com
Guest

Posted: Sun Aug 05, 2012 7:45 am Post subject: leaking brake calipers

I ordered the rotors just to keep on the shelf as long as I was stocking up on pads and other parts.   I was recommended to use the ATF a while ago, and after some research decided to use it.  Higher flash point as well.

Again, look here - https://www.amsoil.com/storefront/ATF.aspx?zo=1785021ww.amsoil.com/storefront/A

Your point is well taken however.

Dave Leikam

On Aug 5, 2012, at 10:21 AM, Kelly McMullen wrote:

 	  Quote: 	

 Hmm,

 While the Amsoil is a hydraulic fluid, I don't know that it tells you anything about its suitability for aircraft brakes. Things like compatibility with seals, flash point, viscosity vs temp range.

 Given that the Royco 782 that is aircraft brake fluid, and is compatible with all other aircraft brake fluids, is within $1 of the same price for a quart, I question this diversion to non-aircraft fluid.  When you leak some and need to top off at an FBO, will you know how 5606 that they have on hand will react with the Amsoil? TheMIL-PRF-83282D assures that the Royco will be compatible, only losing some of its higher flash point, if mixed.

 I can't imagine why you would need rotors before you have a few thousand hours on the plane.

 Kelly

 On 8/5/2012 6:02 AM, David Leikam wrote:

> 

> 

> Thanks!  I'll get the viton seals and give them a try.  I use Amsoil ATF fluid.  https://www.amsoil.com/storefront/ATF.aspx?zo=1785021ww.amsoil.com/storefront/A

> And I carry a Halon extinguisher.  170 hours and the pads look OK although I just ordered Rapco pads, rotors and desser tires.

> 

> Dave Leikam

> 

> On Aug 4, 2012, at 10:30 PM, David Leikam wrote:

> 

>> 

>> 

>> I flew into OSH and landed on runway 9 last Friday during the show.  I had to taxi quite a distance on turf to get to the HBP area with the other 10's.  As I got closer to the parking area, i noticed my brakes getting spongy.

>> I don't think I ride the brakes much at all but taxiing on the grass made me tap dance on them quite a bit.  I few back to KUES that evening and found a leaking right caliper.  Opened it up and found the o-ring pretty worn on one side, almost flat.  The wall looked good with no sign of scoring or scratches.  I replaced the o-ring but have not tested the brakes yet.  I also found the left caliper leaking slightly as well.  Have not inspected it yet.  The plane has about 170 hours.  Had no problems prior to this flight.

>> The question is, would heating up the brakes cause the o-rings to fail?

>> 

>> Dave Leikam

>> 

>> 

>> 

>> 

> 

> 

> 

> 

>

dave.saylor.aircrafters(a
Guest

Posted: Tue Aug 07, 2012 6:05 am Post subject: leaking brake calipers

I borrowed a caliper from a customer to get home from OSH under very

similar circumstances.  I ordered a replacement and when it arrives

I'll compare it dimensionally to the faulty one.  I tried a new o-ring

but it leaked just as bad.  There's no evidence of significant scoring

or marks in the bore, so I guess the bore is just worn too large.

We'll see when the new one comes in.



I think the Viton o-rings and MIL-PRF-83282D are the way to go.



Dave Saylor

831-750-0284 CL

On Sat, Aug 4, 2012 at 8:30 PM, David Leikam <arplnplt(at)gmail.com> wrote:

 	  Quote: 	
		  

 



 I flew into OSH and landed on runway 9 last Friday during the show.  I had to taxi quite a distance on turf to get to the HBP area with the other 10's.  As I got closer to the parking area, i noticed my brakes getting spongy.

 I don't think I ride the brakes much at all but taxiing on the grass made me tap dance on them quite a bit.  I few back to KUES that evening and found a leaking right caliper.  Opened it up and found the o-ring pretty worn on one side, almost flat.  The wall looked good with no sign of scoring or scratches.  I replaced the o-ring but have not tested the brakes yet.  I also found the left caliper leaking slightly as well.  Have not inspected it yet.  The plane has about 170 hours.  Had no problems prior to this flight.

 The question is, would heating up the brakes cause the o-rings to fail?



 Dave Leikam

Display posts from previous:

	Matronics Email Lists Forum Index -> RV10-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum