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May be some useful information in here.
https://www.netbug.net/blogmichael/2017/08/21/bleeding-austin-healey-4-wheel-drum-brakes/
M
On Fri., Apr. 23, 2021, 11:12 p.m. Bob Spidell via Healeys, <
healeys@autox.team.net> wrote:
> 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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<div dir=3D"auto">May be some useful information in here.<div dir=3D"auto">=
<a href=3D"https://www.netbug.net/blogmichael/2017/08/21/bleeding-austin-he=
aley-4-wheel-drum-brakes/">https://www.netbug.net/blogmichael/2017/08/21/bl=
eeding-austin-healey-4-wheel-drum-brakes/</a><br></div><div dir=3D"auto"><b=
r></div><div dir=3D"auto">M</div></div><br><div class=3D"gmail_quote"><div =
dir=3D"ltr" class=3D"gmail_attr">On Fri., Apr. 23, 2021, 11:12 p.m. Bob Spi=
dell via Healeys, <<a href=3D"mailto:healeys@autox.team.net";>healeys@aut=
ox.team.net</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Listers,=
<br>
<br>
I have a problem with my BN2's brakes that is driving (heh) me up the <=
br>
wall. Here's what I've done:<br>
<br>
- new shoes and cylinders in both rear wheels<br>
- one new cylinder in one front wheel (there's a total of 4 in the 2 <b=
r>
front wheels)<br>
- new master cylinder<br>
<br>
I hadn't touched the M/C, so after all the installs I just pressure ble=
d <br>
as I usually do (this has worked well on my BJ8 for decades and a couple <b=
r>
times for the BN2). At first, I got decent pedal then, after a period of <b=
r>
time I lost it; the pedal would go to the floor with only slight <br>
pressure (probably from the return springs). Thinking it could only be <br>
the M/C, I sprung for a new TRW brand M/C but after installing it and <br>
bleeding I got the same results. I've put 2 full quarts of Castrol'=
s <br>
finest 'synthetic' DoT4 through the system and tried vacuum bleedin=
g and <br>
old-fashioned 'pump and hold' method; same result for all methods. =
I'm <br>
not losing fluid as far as I can tell, and the pedal will pump up a bit <br=
>
with a half-dozen or so strokes, but will go back to the floor after <br>
some time.<br>
<br>
Any and all ideas and suggestions accepted and welcomed.<br>
<br>
TIA,<br>
Bob<br>
_______________________________________________<br>
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s/michaelsalter@gmail.com" rel=3D"noreferrer noreferrer" target=3D"_blank">=
http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com</a><b=
r>
<br>
</blockquote></div>
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