Re: IML: 66 Drum brake issue
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Re: IML: 66 Drum brake issue



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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