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International Automotive Technicians Network
Re: Pressure Brake Bleeder
Posted to Technical Discussion Forum on 8/30/2023

Brake Master Cylinders and Wheel Cylinders have sealing cups with lip design that when pressure is applied to them they seal better. If a vacuum is applied to system it has a good chance of sucking air into the hydraulic fluid. I can think of quite a few times... Login to read more.