Sender: <marv@lancaironline.net>
To:  lml@lancaironline.net
Date: Wed, 29 Dec 2010 21:21:36 -0500
Message-ID: <redirect-4658345@logan.com>
Received-SPF: none
 receiver=logan.com; client-ip=209.172.128.24; envelope-from=jerry@mc.net
From: "Jerry Grimmonpre" <jerry@mc.net>
References: <list-4657252@logan.com>
Subject: Re: [LML] Re: bleeding brakes
MIME-Version: 1.0
Content-Type: text/plain;
	format=flowed;
	charset="utf-8";
	reply-type=original
Content-Transfer-Encoding: 7bit

Bill,

This procedure worked beautifully ... for the RV4
Using an RC airplane rotory, or suitable pump, the pump being fed from a 
plastic jar (resevoir), through the wheel cylinder, up to the master 
cylinder, empasis on "up", up to the fire wall resevoir (highest point in 
the brake system), a fitting then screwed into the top of the firewall 
reservoir and a line returning down to the pump reservoir.  There was no 
brake fluid lost.  The bleed line used was 1/4"  see-through plastic hose 
from ACE (aircraft consumables & equipment).

Helping all this was: using an in-line capped T fitting at the top of the 
brake line going to the top of the master cylinder.  Also see-through nylon 
line (the standard RV4 stiff opaque nylon line) connecting the bottom of the 
master cylinder to the firewall brake resevoir.

The procedure: cap the T fitting, pump fluid up to the master cylinder until 
it can be seen just starting up the line to the firewall reservoir, stop 
pumping.  Repeat this procedure to the other wheel.  Now open the top of the 
T's by removing the caps and let it rest 24 hours.  Bubbles will migrate up 
and out the T and up and out to the firewall resevoir.   Reinstall the T 
caps and tighten, finish pumping the firewall resevoir full and allow the 
line from the firewall resevoir, to the pump resevoir, to drain (watch the 
overflow tube clear-up).  Plug the firewall resevoir .... done!

Good luck,
Jerry


----- Original Message ----- 
From: "Robert R Pastusek" <rpastusek@htii.com>
To: <lml@lancaironline.net>
Sent: Tuesday, December 28, 2010 8:53 PM
Subject: [LML] Re: bleeding brakes


> Bill,
>
> I's possible that the individual brake cylinders attached to the brake 
> pedals are causing the problem. It could be any or all of the four (two on 
> the left side/two on the right). If any cylinder is compressed even a 
> small amount, it acts as a shut off valve for the fluid. The solution (for 
> me) was to pull the top of each brake pedal aft as far as it will go. 
> There's a spring on the cylinder so they should stay in position once 
> "retracted." If you have a parking brake, that's also suspect; I'd be sure 
> it's fully open.
>
> For my money, adding fluid at the brake calipers is the only way to do it. 
> This helps (but does not ensure) push air out of the lines as you 
> fill...but even with this method, it may take several tries. This is also 
> a two-person job; doing this alone is at the minimum bound to make a mess.
>
> Hope this helps.
>
> Bob
>
> Bill H says:
> Need some help with bleeding the brakes.  I have replaced the nylaflow
> tubing in my L-IVP and  I am having a problem getting fluid back into
> the lines.
>
> I originally started from the bottom  by attempting to pump fluid up
> thru the fitting on the brake housing.  No luck;  wouldn't take the
> fluid....big mess.  Next, I filled up the reservoir and tried to fill
> the lines from the top down;  by pumping the hydraulic cylinders on the
> rudder pedals.  No luck...bigger mess.  It seems like I am trying to
> push the fluid thru a check valve, the wrong way.
>
> Funny thing is that I can remember years back when I first installed the
> brakes, I ran into the same exact problem.  Cant remember what exactly
> solved the problem but history seems to be repeating itself.  Guess the
> memory is worse than I thought.  Can there be a sequence to bleeding
> these brakes that I'm not aware of?
>
> Happy Holidays, Bill Hogarty
>
>
>
> --
> For archives and unsub 
> http://mail.lancaironline.net:81/lists/lml/List.html
>
>
> --
> For archives and unsub 
> http://mail.lancaironline.net:81/lists/lml/List.html
>