front drum brake push pins at an angle - Team Camaro Tech
Brakes, Suspension & Steering Conversion questions, Steering & Handling

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post #1 of 3 (permalink) Old Aug 11th, 17, 02:54 PM Thread Starter
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Frank
 
Join Date: Mar 2002
Location: white plains, ny
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front drum brake push pins at an angle

I replaced only the wheel cylinders and brake hoses on a 68 Camaro with 4 wheel drums as they were leaking and had a bad pull when pushing the brakes moderately (pull seemed to be from a collapsed hose). After replacement, the car stops great except with a panic stop it will lock the rear up early. I looked closer and found the front wheel cylinder pins are pushing up at an angle, but I decided to first try a new set of shoes all around and cut the drums first. One rear drum was slightly out of round (thought that might solve the problem), but the new shoes still had the front pins at an angle and it still locked up the rear brakes prematurely. I next tried ACdelco wheel cylinders in the front, the first replacements were Dorman, but they have the pins at the same angle. I put the original leaking wheel cylinder back in as I wasn't paying attention to the angle of the pins when I disassembled it, but it also looked the same. The picture is of that wheel cylinder with the springs off for clarity. Is this angle normal? the rear are straight. Do 4 wheel drums tend to lock the rear brakes? Everything is what seems original and correct and the primary and secondary shoes are correct on the front and rear. The master was bench bled while level and everything else bled completely with a firm pedal.
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post #2 of 3 (permalink) Old Aug 11th, 17, 05:25 PM
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David Pozzi
 
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Re: front drum brake push pins at an angle

The pins are OK like that. Everything straightens out when you push on the brake pedal. The shoes move apart.
The amount of friction the brakes generate depends on how well the shoes match the drum curvature. When the drum is turned, the shoes should be Arced to match that larger radius. It doesn't seem to get done anymore.
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post #3 of 3 (permalink) Old Aug 14th, 17, 07:53 AM Thread Starter
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Frank
 
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Re: front drum brake push pins at an angle

Thank you for the reply.
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