Sticking calipers

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Apr 21, 2014 | 01:36 PM

staples76

Thread Starter

Freshman User

Joined: Feb 2003

Posts: 33

Likes: 0

From: JBLM, WA

Sticking calipers

I just completed swap of power disc brakes from a 76 to my 65. The problem is my calipers are too tight. When the truck is cool and not running it will roll fine under manual power. As soon as I start my truck the calipers tighten to the point that it doesn't roll freely. I have new master cylinder, calipers and lines. I reused portioning valve and the brake booster. In the current condition the brakes heat up when I drive to the point of locking up. Anyone?

Apr 21, 2014 | 02:28 PM

HIO Silver

Fleet Owner

Joined: Dec 2009

Posts: 20,678

Likes: 83

From: NorCal

Test the check valve. If it's okay, replace the booster... somehow it's getting a false vacuum signal as if the brakes are being actuated when it is not.