[TR] TR6 Brakes

[Ron Olds]

Everyone,

Thanks for the great advice. I will look into the situation in more detail this weekend and report back on my findings.

Ron Olds
72 TR6
50 MGTD


-----Original Message-----
From: Michael Porter [mailto:mdporter at dfn.com] 
Sent: Wednesday, October 4, 2017 23:01
To: Ron Olds <rolds at plausa.com>
Subject: Re: [TR] TR6 Brakes

On 10/4/2017 7:58 PM, Ron Olds wrote:
> Bill,
>
> No the car hasn't been jacked up and no work has been done to the brake system. The pedal is all the way up and won,t go down because the brakes are fully on.
>
>
>
The previous advice about corroded, sticking calipers and hoses with internally perished rubber creating blockage are the most common ways in which calipers remain engaged, but there is also a small valve in the master cylinder called the "tipping valve" which, when the brakes are applied, prevents reverse flow out of the master cylinder, and when the brakes are released, lets fluid return to the reservoir.  It's possible, as well, that this item is sticking and preventing fluid from exiting the master cylinder body and refilling the reservoir.

It's also possible that there's some mechanical binding between the master cylinder and the servo unit.  Even though the pedal is fully up, it's possible that something is preventing the return of the master cylinder shuttle.  If you loosen the nuts holding the master cylinder to the servo unit and pull the master out slightly from the servo, and then the brakes release, there's probably something amiss with servo.


Cheers.

-- 


Michael Porter
Roswell, NM


Never let anyone drive you crazy when you know it's within walking distance....