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Re: Drum brakes weak
[Re: dogdays]
#1726496
03/12/15 12:41 AM
03/12/15 12:41 AM
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Joined: Jan 2003
Posts: 15,386
Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,386
Omaha Ne
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Quote:
Wow, sounds like adjusting the arc of the shoes is a real dark science. It's not.
Take your drum and put a shoe inside it. If the shoe touches in the middle but not on the ends, put it on a flat surface lining side up and hit it in the middle with a dead blow hammer. Check. Repeat until the shoe contacts the drum all the way. If the shoe touches at the ends but not the middle, turn the shoe so it's vertical, then hit on the end. Check. Repeat as necessary.
R.
http://brakeperformance.com/index.php?ad=google&gclid=CLOSs9nF2rgCFS9dQgodziMAjw
I agree to a point, back in the day, when the drums were turned, the shoes were arced to the drums with a now obsolete machine, ( which I have two of  ) OK fast forward 30 or so years and the material used on the linings has been superseded,( IE: improved, NOT!!) several times by cost cutting / substituting materials that work for MOST of the POPULAR applications.
A 4 wheel drum brake car from the 60's does not fit into the category of MOST POPULAR Applications for the suppliers.
The superseding of the material, losing 5 or 10% effectiveness at each revision of which there have been several) now results in a hard pedal with no effect due to , THE material being used (less effective), and the linings not having full contact with the drum 
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