XK (X150) V8-4.2L (2008)
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Vacuum Brake Booster: Description and Operation
Brake Booster
COMPONENT LOCATION
INTRODUCTION
Power assistance for the braking system is provided by a vacuum operated non-active brake booster. The unit gives a boost ratio of 6.2:1 and is
secured to the drivers side of the engine compartment bulkhead by 4 studs/nuts.
The input push rod within the brake booster is connected to the brake pedal. The output rod locates in the primary piston of the brake master cylinder.
VACUUM PIPE
A 2 piece plastic vacuum pipe connects the brake booster to the inlet manifold to provide the necessary vacuum inside the booster. The connection
into the brake booster also contains a check valve to maintain the vacuum and prevent fuel vapor from entering the brake booster.
