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International Automotive Technicians Network
Re: Ebrake Not Holding/working
Posted to HD/Fleet Forum on 7/9/2019

The dump valve your talking about, applies air pressure to release the parking brakes. So when they leak, the brakes usually drag alittle. Chock the wheels, release the parking brake, and at governor cutout, get the brake throws on all chambers. Usually brake ... Login to read more.