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andygold(at)rkymtnhi.com Guest
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Posted: Sat Mar 17, 2007 3:00 pm Post subject: Bleeding Brakes |
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Where can I find step by step instructions on how to bleed the brakes.
When I built the plane 10 years ago I had help with this from an A&P friend
and most of what I remember was that it was a big mess. I found a leaky
wheel cylinder today which means a new set of O-rings and an afternoon of
fun. Having a little less fun than the first time would be a good thing.
Then someone said I'll have to open up the master cylinders while I'm doing
this, but I don't recall that. I think I remember bleeding straight up into
the reservoir.
Can anyone help me refresh my memory?
Thanks,
Andy
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recapen(at)earthlink.net Guest
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Posted: Sat Mar 17, 2007 4:09 pm Post subject: Bleeding Brakes |
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Matco's website has two sets of instructions...pressure and suction.......
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bobbyhester(at)charter.ne Guest
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Posted: Sat Mar 17, 2007 4:27 pm Post subject: Bleeding Brakes |
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Here is how I did it:
http://webpages.charter.net/bobbyhester/FinishingUp.htm
Surfing the web with my laptop from Hopkinsville, KY
Visit my RV7A website: http://webpages.charter.net/bobbyhester/MyFlyingRV7A.htm
Andy Gold wrote:
Quote: |
Where can I find step by step instructions on how to bleed the brakes.
When I built the plane 10 years ago I had help with this from an A&P
friend and most of what I remember was that it was a big mess. I
found a leaky wheel cylinder today which means a new set of O-rings
and an afternoon of fun. Having a little less fun than the first time
would be a good thing.
Then someone said I'll have to open up the master cylinders while I'm
doing this, but I don't recall that. I think I remember bleeding
straight up into the reservoir.
Can anyone help me refresh my memory?
Thanks,
Andy
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deruiteraircraftservices( Guest
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Posted: Sun Mar 18, 2007 12:35 am Post subject: Bleeding Brakes |
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Hi Andy,
I used a pressure tank, it holds about a gallon of brake fluid, use the pump
to bring the vessel under pressure, attach the hose to the bleednipple on
the caliper, open the nipple about a turn and open the valve. it shoots the
brakefluid straight into the system and out of the fluid resevoir if you're
not careful. You'll find a -4 fitting will screw into your brake fluid
resevoir, a bit of alu tubing and a jar at the bottom if you're not keen on
cleaning spilt brake fluid. Takes about five minutes this way, and you can
do it alone.
Marcel
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Dale Ensing
Joined: 11 Jan 2006 Posts: 571 Location: Aero Plantation Weddington NC
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Posted: Sun Mar 18, 2007 4:42 am Post subject: Bleeding Brakes |
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Marcel's suggested method also worked very well for me. I ran the tubing
from the reservoir back into the gallon container the brake fluid came in
which allow me to push sufficient fluid thru the lines to carry some bubbles
out of the high points in the lines between the left and right pedals.
Note: I used a one gallon garden sprayer for my pressure tank. When I first
tried this, I used the garden sprayer pump to pressurize it. Not a good
idea! The bottom of the pump was below the fluid level in the tank and this
put small bubbles into the fluid that showed up as large bubbles after a
period of time. I then drilled a hole in the top of the garden sprayer tank
for an air fitting. (a filler valve like on an inner tube but with pipe
treads on the other end.) I sealed the air fitting to the plastic tank with
Super Glue. The pressure tank was then pressurized with an external source.
Put in about 10 pounds or so. Enough to get the fluid moving sufficiently
fast to move the air bubbles to the reservoir and out to the catch can.
Dale
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_________________ Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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rocketbob(at)gmail.com Guest
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Posted: Mon Mar 19, 2007 11:58 am Post subject: Bleeding Brakes |
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Andy, what I do is once the caliper is ready to go back on I "pre-bleed" the caliper by filling it with fluid so you are not pushing a bunch of air through the brake lines and master cylinders. I also don't drain the fluid out of of the lines; when removing the caliper I stop the line up with an AN plug. If you do it right, the brake will not need to be bled. If you're quick about disconnecting/reattaching the brake line to the caliper you will only get a few drops on the floor by doing it this way.
Regards,
Bob Japundza
RV-6 flying F1 under const.
On 3/17/07, Andy Gold <andygold(at)rkymtnhi.com (andygold(at)rkymtnhi.com) > wrote:[quote]--> RV-List message posted by: "Andy Gold" < andygold(at)rkymtnhi.com (andygold(at)rkymtnhi.com)>
Where can I find step by step instructions on how to bleed the brakes.
When I built the plane 10 years ago I had help with this from an A&P friend
and most of what I remember was that it was a big mess. I found a leaky
wheel cylinder today which means a new set of O-rings and an afternoon of
fun. Having a little less fun than the first time would be a good thing.
Then someone said I'll have to open up the master cylinders while I'm doing
[b]
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