Pressure bleeding

[Paul Heneghan]

Hello Eyvind.

You don't need to press the pedal.

You are in danger of running out of fluid in the reservoir and pumping air
round the system though.  If you can, refine your design to include an
external fluid reservoir.  My Gunson Eezi-Bleed device (only about GBP15)
has a pressure line with a tyre valve connection on it - this connects to
the spare tyre and supplies the pressure.  You must reduce the pressure in
the spare tyre to about 15psi to avoid popping the reservoir to master
cylinder seals.

The other end of this pressure line goes to the lid of my external reservoir
- a plastic bottle.  Also screwing into the lid of this external reservoir
is the fluid pipe, but there is a pick-up tube attached to this to make sure
that it supplies fluid from the bottom of the external reservoir instead of
air from the top.  The other end of the fluid pipe then goes to the modified
car reservoir cap.

See if you can get a Gunsons Eezi-Bleed
http://www.gunson.co.uk/acatalog/index.html.  It'll save you lots of time
and effort.

Paul

From:		Eyvind Spangen
Date:		Tue, 28 Aug 2001 17:03:53 +0200 
Subject:	Pressure bleeding 
> I made a pressure bleeder today by using an old reservoir cap and
> attaching a hose to it. I made it to change brake fluid in my '90 V8
> (no clutch). Now to the question: Do I have to keep the brake pedal
> depressed to allow fluid flow from the reservoir to the lines &
> calipers, or can I just attach the bleeder and start bleeding, just
> watching the reservoir? I've bled brakes the "old" way a million times
> before, but never with a pressure bleeder..






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