F 550 4WD Super Duty V8-6.4L DSL Turbo (2008)
Vacuum Brake Booster: Description and Operation
Brake Booster - Vacuum
The vacuum power brake actuation system consists of the following components:
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Brake booster assembly
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Brake booster vacuum fitting with check valve
Pedal pressure is amplified by the brake booster. The brake booster uses engine vacuum from the intake manifold. The low pressure in the intake
manifold is applied to a rubber diaphragm on the vacuum side of the brake booster chamber which then pulls the piston rod in when the brakes are
applied to supply a power assist.
