Re: Brake Noise & Fading

Posted by Ross On 2022/11/18 7:37:47
Pulsation will almost certainly be caused by out of round drums. Check your diameters; if they are as much as 12.06" throw them away. Other wise you may have them turned true. Thin drums have lost their heat storage capacity and will fade quickly.

The secondary shoe will press against the anchor pin regardless--otherwise the shoes would just spin with the drum. If the weaker spring is on the secondary, that shoe will come out first, but then be thrown violently back onto the anchor pin as soon as the lining touches the drum. If the shoes are adjusted nice and tight that would be hard to notice as the motion would be slight, but as the adjustment wears, that abrupt movement can cause grabbing.

From time to time I get cars in with the idle set high to overcome a variety of old age issues. When I drive back from Wally's store with afternoon coffee in hand these cars careen down the hill like something from a seventies movie chase scene. The brakes can not handle the addition of all that extra energy. 500 rpm max please and if your car won't idle that low find out why.

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