[Healeys] BN2 Brake Problem

[healeyguy at aol.com]

Bob / ListersFrom the Factory manual under Bleeding the Hydraulic System."Note:  It is advisable to turn all the brake shoe adjusters to their full "off" position before bleeding.  After bleeding adjust brakes as described."Perry

-----Original Message-----
From: Bob Spidell via Healeys <healeys at autox.team.net>
To: Healeys <healeys at autox.team.net>
Sent: Fri, Apr 23, 2021 11:04 pm
Subject: [Healeys] BN2 Brake Problem

Listers,

I have a problem with my BN2's brakes that is driving (heh) me up the 
wall. Here's what I've done:

- new shoes and cylinders in both rear wheels
- one new cylinder in one front wheel (there's a total of 4 in the 2 
front wheels)
- new master cylinder

I hadn't touched the M/C, so after all the installs I just pressure bled 
as I usually do (this has worked well on my BJ8 for decades and a couple 
times for the BN2). At first, I got decent pedal then, after a period of 
time I lost it; the pedal would go to the floor with only slight 
pressure (probably from the return springs). Thinking it could only be 
the M/C, I sprung for a new TRW brand M/C but after installing it and 
bleeding I got the same results. I've put 2 full quarts of Castrol's 
finest 'synthetic' DoT4 through the system and tried vacuum bleeding and 
old-fashioned 'pump and hold' method; same result for all methods. I'm 
not losing fluid as far as I can tell, and the pedal will pump up a bit 
with a half-dozen or so strokes, but will go back to the floor after 
some time.

Any and all ideas and suggestions accepted and welcomed.

TIA,
Bob
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