Date: Tue, 8 Apr 2008 15:25:56 -0700
Reply-To: Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM>
Subject: Re: Foot actuated parking brake
In-Reply-To: <47FBED9E.4010007@gmail.com>
Content-Type: text/plain; charset="us-ascii"
That device appears to be purely mechanical perhaps, I didn't' read about it
There are electric ones also, for sure.
But they are mainly for short period parking brake function on all 4 wheels.
For serious use, or longer periods, I would expect some slow bleed off of
hydraulic brake pressure. - Like a leaky rear wheel cylinder could allow
your rig to run off down the hill when you weren't looking, after sitting a
while with it applied.
Hydraulic brake systems are not designed for continuous steady pressure .
Yeah, these valves are 'brake pressure holder' valves. You step on the
pedal, applying pressure that way, and the device holds that pressure after
you take your foot off the brake.
A purely mechanical parking brake has it's obvious advantages.
If you are asking if a regular parking brake is also a backup emergency
brake, yup, they are. Called parking brake and e-brake interchangeably.
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Mike Elliott
Sent: Tuesday, April 08, 2008 3:12 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Foot actuated parking brake
On 4/8/2008 2:37 PM VW Doka wrote:
> Or you could keep it simple and use one of these:
>
> http://www.mooreparts.com/store/product/2769/AC611590/
I'm a little dim in the area of brakes and the wonderfulness of how they
work. So for this little hydraulic brake park lock thing, um, you step
on the brake pedal, push the plunger on the lock and it keeps the
pressure on the brake piston thingies or something?
If the mechanical pull lever is intended as a parking brake, the lock
could be cool. But if viewed as an e-brake, well, isn't it intended to
provide some kind of backup in case the hydraulic system sprang* a leak?
==
* Is "sprang" a word? Sprung? Sprunged? Springed?
--
Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
KG6RCR
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