<VV> 69 brake system diagram?
LonzoVair at aol.com
LonzoVair at aol.com
Tue Aug 31 19:30:12 EDT 2010
In a message dated 8/31/2010 6:06:11 P.M. Eastern Daylight Time,
vairguy at echoes.net writes:
<<I do believe that the problem I'm investigating is in the pedal/MC
assemblies and not the lines, but I want to cover all my bases and have
told that the factory dual-MC setup (as far as the lines and the presence
proportioning valves) is different than the conversion..
Ray (and whatever unwashed masses there may be),
The late LM dual reservoir master cylinder does NOT (I repeat *NOT* just
for clarification and for those not listening) have a proportioning valve...
what is has is a large brass junction block with a small electrical warning
switch screwed into the front. That switch is probably the most
misunderstood think in a LLM... there is a small "shuttle" to ground that resembles a
barrel bearing roller with a *bite* out of it, and it sits snuggly in the
pathway between the front and rear pipe pathways. When enough pressure is
built up (and not enough on the other side) the shuttle slides towards the
lesser pressure, touching the grounding switch, lighting up the light in the
How do I know this?
I cut one open with a wiz wheel about 18 years ago to prove it wasn't a
"proportioning valve"... and won $50 because the guy thought I wouldn't do it
and believed it was....
So it's not a proportioning valve, just a high fallootin' junction block...
when I added the LLM set up to my 64 700, I included the junction block,
just because I had it, and I also have a parking brake warning light under
the dash as well, and I wired the "junction block switch" to the parking
brake warning light switch... so I now have a warning for both types of brake
If your brakes are not adjusted correctly, and the master cylinder loses
fluid, you WILL NOT have brakes. I check & adjust (if needed, and sometimes
it is) at every oil change (or whenever I have it up on a rack at the
neighbor's garage)... but I've been dealing with these little cars and vans for
20 years now...
So there ya have it...
Oh, and Ray, sorry if I seem to nit-pick, but selling car parts for most of
my life and having people call parts the wrong thing has made me almost as
annoying as a few fellow VV members get when someone mentions a "rear
windshield" (actually a backlight) or even a bendix (it's a starter drive for
Pete's sake! Unless we're discussing "The Life of Riley"...)... and a few
Lonzo... teacher extrordinaire, and "all around" mushroom... get it? I'm a
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