Sender: <marv@lancaironline.net>
To:  lml@lancaironline.net
Date: Tue, 07 Sep 2010 10:48:36 -0400
Message-ID: <redirect-4458095@logan.com>
Received-SPF: pass
 receiver=logan.com; client-ip=74.125.82.180; envelope-from=jeffreyb.peterson@gmail.com
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:reply-to:date:message-id:subject:from:to:content-type;
        b=L4MLaH5aYlxlR+ZmlnBb4YfpifbMNn1x4msQiFQeGpdBW/poUN3010NasHxFSNHdPD
         HGt9A43eC6gOWP1vvKTy8OBqToD1HJvaCdja21E/Hd0SQzQiLXAEOtj/3j2wLgY52Jrb
         V06HwsSClD8KM2dxltQ6C3pxH2llAPVVD2RO4=
MIME-Version: 1.0
Reply-To: jbp@cmu.edu
Subject: brake bleeding
From: Jeff Peterson <jeffreyb.peterson@gmail.com>
Content-Type: multipart/alternative; boundary=0016e64974e650464d048f9f9710

--0016e64974e650464d048f9f9710
Content-Type: text/plain; charset=ISO-8859-1

I have bled the brakes on my 360 from the top using a vacuum pump.

Works so well that transparent lines should not be needed.


My procedure:

The fill hole at the top of the reservoir has an 1/8 inch NPT thread,
normally a plug with a small hole goes there.

I took out the plug and put in an NPT-to-hose-nipple, and connected
a vacuum pump via tygon tubing.

The brake **plumbing inside the cockpit is "nylaflow" tubing which is
translucent, so I could see bubbles vs red brake fluid.

I turned on the pump, and watched the bubbles grow to about 100 times their
original size.

Because I could watch I have confidence the fluid does not boil, but

the procedure itself does not need clear lines,..you will just miss the fun
of watching the process work.

Most of the greatly expanded air makes it to the reservoir, bubbles up
and ends up passing into the pump.

With vacuum applied the calipers open about 1/4 inch.

Since the motion of the bubbles eventually stopped
(1 min) I know there was no leak in the system.  After the bubble
stopped moving I let air back in,
watched the few remaining bubbles shrink, and
pumped the peddles to push the calipers back into position.

Repeated this process maybe 5 times. Pedals very firm now.   Not a
drop of fluid on the floor.
Topped up the reservoir at the end. Process takes maybe 15 min.


-- 
Jeff Peterson
N273CK L360

--0016e64974e650464d048f9f9710
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<p>I have bled the brakes on my 360 from the top using a vacuum pump.</p><p=
>Works so well that transparent lines should not be needed.</p><p><br></p><=
p>My procedure:<br></p><p>The fill hole at the top of the reservoir has an =
1/8 inch NPT thread,
 <br> normally a plug with a small hole goes there. <br> </p><p>I took=20
out the plug and put in an NPT-to-hose-nipple, and connected <br> a=20
vacuum pump via tygon tubing. <br> </p><p>The brake <b></b>plumbing inside =
the=20
cockpit is &quot;nylaflow&quot; tubing which is <br> translucent, so I coul=
d see bubbles vs red brake fluid. <br> </p><p>I turned on the pump, and=20
watched the bubbles grow to about 100 times their original size.</p><p>Beca=
use I could watch I have confidence the fluid does not boil, but</p><p>the =
procedure itself does not need clear lines,..you will just miss the fun of =
watching the process work.<br>
</p><p>Most of the greatly expanded air makes it to the=20
reservoir, bubbles up <br> and ends up passing into the pump. <br> </p><p>W=
ith=20
vacuum applied the calipers open about 1/4 inch. <br> </p><p>Since the=20
motion of the bubbles eventually stopped <br> (1 min) I know there was=20
no leak in the system. =A0After the bubble <br> stopped moving I let air=20
back in, <br> watched the few remaining bubbles shrink, and <br> pumped=20
the peddles to push the calipers back into position. <br> </p><p>Repeated
 this process maybe 5 times. Pedals very firm now. =A0 Not a <br> drop of=
=20
fluid on the floor. <br> Topped up the reservoir at the end. Process=20
takes maybe 15 min. <br> </p><br clear=3D"all"><br>-- <br>Jeff Peterson<br>=
N273CK L360<br>

--0016e64974e650464d048f9f9710--