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International Automotive Technicians Network
Re: class 8 frozen truck,/trailer brakes
Posted to HD/Fleet Forum on 1/27/2021

Hi Michael C.,

I recall the military had similar equipment many years ago. There was a vacuum line from the gas powered hauling rig to the trailer. The trailer had a large vacuum booster with a hydraulic MC. Vacuum was preferred over air pressure due to mois... Login to read more.