The brake light switch screws into the front (sometimes at the
bottom
orifice) of the OEM M/C.
Installing a dualie is not cheap, quick, or really easy to retrofit,
and includes
a separate plumbing-connection of that switch into the brake's
hydraulic system.
See attached.
On 8/5/2014 8:32 PM, Roger van Hoy
wrote:
Ok, I’ll bite. Where’s the “brake light switch warning
light” on an original ‘57 Dodge’s master cylinder? AFAIK
the brake light hydraulic switch threads into the front of
the master cylinder and any leaking would be out of the
master, not into it. The parking brake warning light
[optional equipment] is on the emergency brake assembly and
is a mechanical switch.
That reminds me, our old emergency brakes work marginally
well in an emergency, not just for parking. In 1996 on the
way to the DeSoto Nationals in Sacramento a guy in a ‘56
DeSoto pulled off the freeway at around 60, hit the brakes
on the off ramp, they failed, and he was able to stop the
car. [He also got the hard luck award.]
--Roger van Hoy
Sent: Tuesday, August 05, 2014 9:50 AM
Subject: Re: [FWDLK] dual masters- was RB
383 cam
And
especially unfortunate because your single pot M/C had been
overhauled
and was 'working' (i.e.: merely holding surplus brake fluid
in it, without leaking).
My car's single-pot failure occurred in 1981, shortly after
I had bought it, and after
it had been dead stored for years, and while not realizing
that all of the various fluid
levels should be checked periodically.
Unbeknownst to me (because I wasn't checking the brake fluid
level) was that a small
amount of fluid was being forced out, past the brake light
switch warning light's
threaded insertion (no teflon tape around it) into the M/C,
every time that the brake
was applied.
Neil Vedder
On 8/5/2014 8:57 AM, Jim wrote:
Or there's this.... You remove the single mc
that has worked fine for 50 years and ask your
mechanic to install a dual plus disk brakes cuz "you
want to be safe". You get the car back and it stops
fine. 6 months later you are driving on the freeway
in the rain and traffic is stopped up ahead. You
put on the brakes and the new front flex hose bursts
because it was a little too short and positioned at
too sharp an angle and has already fatigued. But
you still have the rear brakes... but since you slam
on the brakes because they are barely stopping the
car (without the fronts you only have 20% braking
capacity) the left rear locks up. The car slides
out of control on the wet pavement, you spin across
3 lanes and into a gas tanker which bursts into
flames. Dozens of people flee in the ensuing panic,
those who don't die in the fire are run over, the
tanker was under a bridge, which weakened by the
fire collapses cutting off access to a home for the
elderly. Two of the elderly, seeing the melee, have
heart attacks. They die because the ambulance
couldn't get to them because the bridge was burned
down by the tanker. If you'd still had the single
MC on none of this would have happened... now single
masters don't seem so bad!
Jim Delton
Here's a scenario... you have a
perfectly maintained single master brake
system in your 57 Saratoga, while trying
to tune in your restored AM radio, you
look up while driving and see its too
late! you just ran over an old guy
crossing the street!!! he flies of the top
of the car but his walker went under and
folded and rolled, and subsequently caught
and tore out your rear flexible hydraulic
line! now you have no brakes and proceed
to broadside a bus full of illegal
immigrants, you go through the windshield
upon impact due to lack of belts, airbags,
and brakes, the bus flips, and all the
passengers burn to death, though one good
event took place lightening the burden on
taxpayers, an old man, his walker, your
car, and bodily well being were
compromised! If you had a dual master, you
may have still hit the old guy, but not
the bus... now single masters don't seem
so bad!
-----Original
Message-----
From: Neil Vedder mailto:esierraadj@xxxxxxxxxxx
To: L-FORWARDLOOK mailto:L-FORWARDLOOK@xxxxxxxxxxxxx
Sent: Tue, Aug 5, 2014 3:10 am
Subject: Re: [FWDLK] RB 383 cam
LOL
(not)....if they failed, they were not
properly maintained, or overhauled, to
prevent such
failures from having occurred.
Neil Vedder
On
8/4/2014 4:37 PM, Ray Jones wrote:
The idea here is
that with Dual MC, you
have 2 brake systems. Not
much trouble to plumb,
using the tubing and
components from a later
year car, it's a big
safety upgrade.
And, yes, I have
had several MC's fail over
the too many years I've
been driving these old
jewels.
You said you had
a wheel cylinder fail,
giving you a brake
problem. With a dual
system, you would still
have the other half to get
home on.
A total upgrade
with calipers and rotors
on the front, and better
yet on the back also is a
real improvement and
brings the car up to
highway cruising safety
standards.
Ray in Mena,
AR
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