When I said it is the simplest park brake I have ever seen I wasn't kidding. The unit is nothing more than a spring steel circle with bonded lining and a manually adjustable actuation lever. Generally the newer park brake cables do not stretch, so if the p brake does not hold, it is because the lined spring steel circle is off center and has worn it's lining from dragging. The lining most likely will still be in good condition, but the manual adjuster will need adjusticated along with the inspection and centering of the circle
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