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  #11  
Old 02-10-2021, 11:48 AM
MED MED is offline
 
Join Date: Jul 2015
Location: Aiken, SC
Posts: 686
Default

Glad you are making progress, Jeff. In the way of encouragement, we used Beringer brakes and parking brakes on our two RV-14s, and after filling them from the bottom, have not had any problems. The brakes are great! You’ll get there.
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N435MD
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  #12  
Old 02-10-2021, 04:12 PM
jeffw@sc47's Avatar
jeffw@sc47 jeffw@sc47 is offline
 
Join Date: Aug 2014
Location: Simpsonville, SC (SC47)
Posts: 366
Default MED - Similar experiences?

Med,

Did you have the same or similar experience as I described with the multiple and lots of pumping up and bleeding with multiple full over flow bottle fills?

Bled them again this morning and raised the pedal cylinders horizontal and got solid hard pedals. Will check again tomorrow morning and see if they're holding.
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Jeff Warren
Simpsonville, SC (@SC47 > 10nm NW Triple Tree)
1946 Bellanca Cruisair 14-13-2 (74 YRS OLD 8/1/20)
RV14A (N14ZT), Ser#140195, Start 10/11/14
Contribution made 12/2/20 (USArmy 2/67-2/70)
www.mykitlog.com/jeffw@sc47
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  #13  
Old 02-10-2021, 05:52 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 5,750
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Quote:
Originally Posted by HFS View Post
I make this little "gadget" that goes in the BF Reservoir when bleeding the brakes to automatically maintain the correct "head space" when there is fluid overflow during the bleeding process.

Pretty self explanatory - when the fluid rises to the level of the bottom of the ez-fill tube, it (fluid) continues up through the tube and out to the discharge outlet (connected to a clear vinyl tube - to monitor removal of entrained air). Once the fluid rises to, and "covers" the inlet, the remaining space above is slightly pressurized (to fluid pressure), and remains to yield the necessary "head space" for an operating system.

The fitting shown has a 90* elbow to clear and potential clearance issues with the cowling hinge line. If conditions permit, a straight thru configuration works just fine.

I silver braze all connections, then bead blast to get rid of "overrun" - then paint.

YMMV - but this works for me.

HFS
Good Idea!! and it really works too.

I do the same thing for the same reason. The difference is I use a brass adapter to 1/4" OD poly tubing and drill the inside so the tube will go all the way through. No brazing needed, and I loosen the B nut and allow the fitting to spin when installing. It is directly attached to a small bottle to catch the over flow, otherwise the little bottles always get away and spill. It hangs down where I can see it when operating the bleed valve and pressure cup.

I use a slightly modified less-than-$10 2 liter hand pump garden sprayer to pressurize from the bottom.
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RV-7
Lord Kelvin:
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and express it in numbers, you know something about it; but when you
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  #14  
Old 02-11-2021, 01:07 AM
HFS HFS is offline
 
Join Date: Aug 2009
Location: Lemoore, CA
Posts: 313
Default Better and Simpler

Enough said.

HFS
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  #15  
Old 02-11-2021, 06:49 AM
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jeffw@sc47 jeffw@sc47 is offline
 
Join Date: Aug 2014
Location: Simpsonville, SC (SC47)
Posts: 366
Default Same better, a bit simpler

After the reservoir is filled and the system bled, I pull about 1.5 ounce of fluid up out of the reservoir with a syringe to create the head space.
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Jeff Warren
Simpsonville, SC (@SC47 > 10nm NW Triple Tree)
1946 Bellanca Cruisair 14-13-2 (74 YRS OLD 8/1/20)
RV14A (N14ZT), Ser#140195, Start 10/11/14
Contribution made 12/2/20 (USArmy 2/67-2/70)
www.mykitlog.com/jeffw@sc47
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  #16  
Old 02-11-2021, 07:10 AM
MED MED is offline
 
Join Date: Jul 2015
Location: Aiken, SC
Posts: 686
Default

Quote:
Originally Posted by jeffw@sc47 View Post
Med,

Did you have the same or similar experience as I described with the multiple and lots of pumping up and bleeding with multiple full over flow bottle fills?

Bled them again this morning and raised the pedal cylinders horizontal and got solid hard pedals. Will check again tomorrow morning and see if they're holding.
We set up an overflow bottle at the reservoir and filled from the bottom of each side with a garden sprayer. We did disconnect the brake cylinders at the rudder pedals and oriented them horizontally to help clear any air, as someone on the forum suggested. Then, as you did, we used a syringe to create a little headspace in the reservoir. All in all, it didn’t take very long and we both ended up with solid brakes.
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  #17  
Old 02-11-2021, 07:59 AM
TS Flightlines TS Flightlines is offline
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,718
Default I'll post this again--

My friend Ray Ward, many time builder of all sorts of planes, uses this bleeder he bought from Amazon, Used with your compressor and a regulator, bleed from the caliper bottom. Certainly forces all the air out.

Tom
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Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
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  #18  
Old 02-11-2021, 04:59 PM
N49ex N49ex is offline
 
Join Date: Apr 2015
Location: Wheaton, Illinois
Posts: 100
Default

First: Yes, bottom up is it!!! Forget anything else, both for planes and cars.

Second: You can make yourself a bleeder:
https://www.kitplanes.com/homemade-c...brake-bleeder/
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  #19  
Old 02-11-2021, 05:09 PM
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rv8ch rv8ch is offline
 
Join Date: Feb 2005
Location: LSGY
Posts: 3,567
Default Oil can

I just use one of these, and yes, a bigger one would be better.

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