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| I would put a gauge on the airline going to the service chamber, then have someone apply the brakes so you can see exactly how much pressure your getting to the brake chamber. This will tell you for sure if it's an air problem or a mechanical problem. Light pressure on the foot valve but pull pressure at the brake chamber-put a gauge where the airline comes from the brake valve to the quick release valve (relay valve), this will tell you if it's a foot valve problem or a quick release valve problem if it wasn't a mechanical problem. | |
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touchy air brakes
