Re: IML: 66 Drum brake issue

["Rob van der Es" <r.vdes@xxxxxxxxxxxxxxx>]

That crossed my mind too, Paul

But then I noticed that this car has drums in the front and rear, like our 
60 Imperial have.
I never noticed a proportioning valve on my 60, so I guess there won't be 
one on a 66 either.

Correct me if I am wrong, but I always thought that proportioning valves 
come in use when you have discs at the front and drums in the rear.

Robert
----- Original Message ----- 
From: "PAUL WENTINK" <randalpark@xxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Tuesday, November 27, 2007 2:47 PM
Subject: Re: IML: 66 Drum brake issue


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.

Paul W.


-----Original Message-----
From: Klebert L. Hall <crocuta@xxxxxxxxxxx>
To: mailing-list@xxxxxxxxxxxxxxxx
Sent: Tue, 27 Nov 2007 4:40 am
Subject: Re: IML: 66 Drum brake issue


> Subject: RE: IML:66 Drum Brake Issue From: "Hall, Marc F" 
> <marc.f.hall@xxxxxxxxxx>
> Hi all,
> I have a braking problem with my '66.
> The car's brakes were tired but ok before turning her over to the
shop
> (SA). Among other jobs, SA rebuilt the brakes and found the rear brakes 
> lock up well before the front brakes engage fully. Lines have been flushed 
> and seem fine. Front brake drums and shoes match ok, some re-arching of 
> the shoes did not solve the problem. Front shoes are of a different mfg 
> than the rear, is this a friction coefficient issus?? SA indicates that 
> they are getting to the end of their expertise on the cause of the brake 
> differential. SA is pretty good at general repairs and Chryslers are not 
> too mysterious for them. I have done the brakes myself at least twice 
> without screwing it up, so the pro's have hit a hitch in their getalong?

Proportioning valve problem(maybe some crud got stuck in there)?

There's probably a rubber line in the back - if it's gotten weak, it
might be 'inflated' by line pressure, so it's keeping the rear brakes
partially actuated all the time, and they grab first. This happened on
my '67 Polara.

-Kle.
'69 Crown 4DHT (in temporary repose)

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