[Tigers] Brake Issue

[Donald Antilla]

Joe: My observation and possible root cause is still valid, even considering you have the problem beforehand.

A flex line that is deteriorating from the inside produces the symptom you described. 

When a line is obstructed, the high hydraulic pressure from the master cylinder will force its way down into the calipers.

However, ...when you get off the brakes there is very little back pressure up into the master cylinder if the line is obstructed.

I suggest you look at your flexible brake lines.

Hope this is helpful.

Regards,

Don

 

From: Joe Brown <jbbrown1980 at gmail.com>
Date: Thursday, June 24, 2021 at 4:48 PM
To: Don Antilla <fast427 at sbcglobal.net>
Cc: Tigers Den <Tigers at autox.team.net>
Subject: Re: [Tigers] Brake Issue

 

I should clarify.  I had the brake locking problem before I replaced or rebuilt everything.  And I still have the same problem.  Could it be something with the master cylinder?

 

Thanks,

Joe

 

On Thu, Jun 24, 2021 at 3:45 PM Joe Brown <jbbrown1980 at gmail.com> wrote:

I have brand new rubber hoses that I got from Sunbeam Specialties last week.

 

On Thu, Jun 24, 2021 at 3:42 PM Donald Antilla <fast427 at sbcglobal.net> wrote:

I had this problem on two different cars. The cause was old flexible hydraulic hoses that had deteriorated inside. 
I changed them and the problem was resolved. 

>From Don's iPhone 203-592-8427
Or 203-264-8301 home

> On Jun 24, 2021, at 4:39 PM, Joe Brown via Tigers <tigers at autox.team.net> wrote:
> 
> 
> Hey,
> 
> I'm scratching my head over an issue I'm having with my brakes.  This actually started last year and I'm just now trying to sort it out.
> 
> Basically, after pumping the brake pedal a few times the front brakes lock up (only the fronts).  If I crack open either bleed screw they free up.  In fact, cracking open the line anywhere going back to the master cylinder frees up the brakes.
> 
> I have bypassed the booster, replaced all of the rubber lines and rebuilt the calipers.  This seems to leave the master cylinder.  I disconnected the brake line from the master cylinder and put a short line on it that feeds back into the master cylinder reservoir so I could bleed any air out of it.  That all seems to work okay.
> 
> So, I'm looking for other ideas.  
> 
> Thanks,
> Joe Brown 
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