Thread: cast iron drums
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Old 08-11-2011, 08:08 AM   #5
Special Coupe Frank
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Default Re: cast iron drums

Quote:
Originally Posted by ctlikon0712 View Post
I'm not arguing the point, just wondering..... Why does everything I see concerning adjusting the brakes show to bias the rear first?

Still learning...

That is the way the Ford Model A system was designed, in terms of the geometry of the operating levers...

The rear brakes apply first, then the fronts.

This is opposite of how drum brakes have been set-up since about WW II (60% front / 40% rear).

As Kurt mentioned, this was the first Ford with 4-wheel brakes; previous Fords ( and most other cars / trucks ) only had brakes on the rear wheels and/or the driveshaft.

At that time, there was an unholy fear of having brakes on the front wheels, on the theory that if you locked-up the front wheels, that took away their steering ability... this was still a concern when the Model A was designed, and they designed the brakes to have the rears apply first, followed by the fronts.

You really can't change this much without modifying the brake operating levers up front. And most Model A-ers don't feel it necessary: well-maintained stock brakes are quite effective.
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