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Originally Posted by V8COOPMAN
Mart.....I believe the system he's talking about is similar to a system that the city of New Orleans used for a safety sticker when I was a wee kid in the '50s.
It easily and visually showed the actual degree of braking that each wheel produced. Obviously, each of the four sight tubes employed a check valve to retain the results in the vertical sight tubes until reset. Pretty slick, actually! DD
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Here in DE they use a plate system as well ( I think Jersey also ). Not sure of the type of sensor mechanism. BUT, I Know well that they detect problems that won't show up with road tests and pulling wheels and drums (ala PA ).
The system however does not show how much usage remains ( like a visual check ). Awareness is the operator/owners responsibility.