Re: Brake Piece

["Joe Zaccaria" <jzaccaria@xxxxxxxxxxxxxx>]

Based on the information and many attempts at solving this problem I have
this theory to throw into the mix.  When the master cylinder is released it
attempts to pull fluid from the reservoir into its compression cavity.  If
the flow of fluid is restricted via a kinked hose (seems to be the common
element here) it may very well suck a small amount of air in past the piston
seals.  (Brake fluid is far more viscous than air).  As it doesn't take much
air in a brake system to cause notable performance loss it isn't unlikely
that removing the kink in the hose solves this problem regardless of whether
the reservoir is raised or not.

Seems logical to me anyway.  Any comments fellas?

Zac
 ------------------------------------------------------------
 Free Web Email & Filter Enhancements.
 http://www.freewebemail.com/filtertools/
 ------------------------------------------------------------
- ----- Original Message -----
From: "Paul Fox" <pgf@xxxxxxxxxxxxxxxxxxxx>
To: <ST@xxxxxxxxxxxxxx>
Sent: Monday, February 12, 2001 2:26 PM
Subject: Re: Brake Piece


> i wrote:
>  >
>  > the problem must clearly be in the reservoir height.
>  >
>
> but you know, the more i think about it, i doubt it's the height.
> most bikes have reservoirs that sit right on top of the cylinder --
> they're actually one unit.
>
> i think that when the Sprint brakes get mushy that there's probably
> air in that little tube, and the cylinder can't fill properly because
> of it.  that would explain why the problem is intermittent, and why
> it goes away when you do any of a number of things to your bike in an
> attempt to fix it.  i'll bet just detaching the reservoir, raising it
> to straighten the hose, and pumping, would fix the problem most of the
> time.  maybe even just tipping the bike (in a controlled fashion :-)
> in the right direction.
>
> paul
> =---------------------
>   paul fox, pgf@xxxxxxxxxxxxxxxxxxxx (arlington, ma, where it's 25.0
degrees)
>
>      *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *
*
>       The ST/RS Mailing list is sponsored by Jack Lilley Ltd.
>           http://www.TriumphNet.com/st/lilley for more info
>    http://www.TriumphNet.com/st for ST, RS and Mailing List info


     *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *
      The ST/RS Mailing list is sponsored by Jack Lilley Ltd.
          http://www.TriumphNet.com/st/lilley for more info
   http://www.TriumphNet.com/st for ST, RS and Mailing List info

=-=-=-= Next Message =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=