Range Rover Sport (LS) V8-4.2L SC (2006)
GENERAL
Power assistance for the brakes is provided by a vacuum operated brake booster. On petrol models, the vacuum is produced by the intake manifold
and an electric vacuum pump. On diesel models, the vacuum is produced by an engine driven vacuum pump.
VACUUM PIPES
Plastic vacuum pipes connect the brake booster to the vacuum source. Check valves are incorporated into the vacuum pipes. On petrol models there
are two in-line check valves, to maintain the vacuum in the brake booster when the throttle is open and the vacuum pump is not running, and prevent
fuel vapor entering the brake booster. On diesel models there is a single check valve integrated into the vacuum pipe connection with the brake
booster, to maintain the vacuum in the brake booster when the vacuum pump is operating at less than the optimum.
BRAKE BOOSTER