All of the modern fluids have an additive that causes seals to swell. One of
the problems with the early silicone fluid was that it lacked this
component, causing leaks in less than perfect systems.
Ray
----- Original Message -----
From: Bob and Carolyn Grunau <cgrunau@pathcom.com>
To: Lewis Palmer <lpalmer@vanstar.com>; Vargas family
<bobbyv@trilobyte.net>; <mg-t@autox.team.net>
Sent: Wednesday, September 08, 1999 6:14 AM
Subject: Re: brake problem
> Use of silicone brake fluid can also cause the master cylinder and/or the
> wheel cylinder rubber cups to swell and not allow full return. Pressure
> retention in the system may be a sign the master cylinder is not returning
> fully and thereby allowing pressure to remain in the system.
> Are you using silicone or DOT 3 or 4? I tried silicone on my race TC and
> found one wheel cylinder and the master cylinder would not move properly (
> all new brake parts ). Flushing and using DOT 4 solved the problem.
> Bob
>
> ----------
> > From: Lewis Palmer <lpalmer@vanstar.com>
> > To: Vargas family <bobbyv@trilobyte.net>; mg-t@autox.team.net
> > Subject: RE: brake problem
> > Date: Tuesday, September 07, 1999 10:55 PM
> >
> > Often, the rebuild kits for the master cylinder contains a seal which is
> > slightly thicker than the original. If, when this returns to its relaxed
> > position, it covers the return vent. This will prevent fluid from being
> > returned into the resevoir. The result is brakes which will pump up, but
> > which will not release pressure.
> >
> > A collapsed inside on a brake hose will do the same thing.
> >
> > Regards,
> > Lew Palmer
> >
> > -----Original Message-----
> > From: Vargas family [mailto:bobbyv@trilobyte.net]
> > Sent: Tuesday, September 07, 1999 4:10 AM
> > To: mg-t@autox.team.net
> > Subject: brake problem
> >
> >
> > Hello All
> > Own a 52 TD, #12569, have restored from the frame up. Am currently in
> the
> > process of putting all the pieces back together, tub is on, floor boards
> in,
> > upholstery is next. Am having a problem with the brakes. Installed a
> new
> > rebuild kit in the master cylinder several months ago. Put the cylinder
> on,
> > new brake lines and hoses. But when I step on the brake, the left front
> > wheel locks up! After bleeding the fluid out, it free wheels.
> > After bleeding the front brakes and again pressing on the brake pedal,
> the
> > left front wheel again locks up. The drum has to be pulled off with a
> wheel
> > puller, but everything is in place, shoes, cylinders, etc. Any ideas??
> >
> > Bob V.
>
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