Re: IML: '66 drum brake issue
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Re: IML: '66 drum brake issue



I had a 66 Newport single pot master cylinder 4 wheel drum brakes and there was definitely no proportioning valve. There was simply a 4-way T with two lines to the front and a single line to the rear.
Proportioning was achieved by having different size wheel cylinders on the front vs. the back.
As to 4 wheel drum brakes with a dual reservoir master cylinder, I don't know if there was a proportioning valve.

----- Original Message -----
From: "Klebert L. Hall"
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: Re: IML: '66 drum brake issue
Date: Tue, 27 Nov 2007 18:59:48 -0500


> Subject: Re: IML: 66 Drum brake issue
> From: PAUL WENTINK
>
> Aren't proportioning valves used on cars with disc brakes
> in the front,and drums in the rear? I don't think a '66
> Imperial had one, unless we are talking about a converted
> brake system here. Then all bets are off.

I always thought that all cars had them, so
that the braking force was less on the back
wheels than on the fronts (so the rears don't
lock up first, due to weight distribution).

I could easily be wrong though; it wouldn't
be the first or last time I turn out to be a
jackass.

-Kle.
'69 Crown 4DHT (it has one, anyway)

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Fred Joslin



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