Re: Hill Holder for BW OD Cars

Posted by HH56 On 2015/6/27 17:59:53

Yes, that one is the unit Packard used which O_D referred to and one I am familiar with. Basically it fits onto the master cylinder and has a small ball in a cage. When on an incline the ball rolls back and blocks a port preventing fluid from returning to the master. The brakes stay applied when you let your foot off the brake pedal. The cage is connected to the clutch linkage via a lever and rod. The rod is adjusted so when the clutch starts being released, at approx the same time the clutch starts to grab the cage moves the ball away from the port so fluid can return and release the brakes.

The part of the original post I don't understand is how anything calling itself a hill holder works similar to the way the brake unit works but can be accomplished in the type OD unit Packard used.