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Home >> Jaguar >> 2005 >> XJ8 Base >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Power Brake Actuation (2003.5-09) >> Description and Operation >> Brake Booster >> Overview

Brake Booster: Overview

WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with the eyes. Wash hands thoroughly after handling, as prolonged contact may cause irritation and dermatitis. If brake fluid contacts the eyes, flush the eyes with cold water or eyewash solution and seek medical attention. If taken internally, do not induce vomiting, seek immediate medical attention. Failure to follow these instructions may result in personal injury.
Fig 1: Identifying Brake Booster Components
G06387757Courtesy of JAGUAR CARS, INC.
ITEM DESCRIPTION

Item Part Number Description
1 - Brake fluid level sensor
2 - Non return valve/vacuum supply
3 - Brake fluid reservoir cap
4 - Brake fluid reservoir
5 - Brake master cylinder active booster solenoid (Vehicles built up to VIN:G45703)
5 - Brake vacuum sensor (3.0L and 3.5L Vehicles built after VIN:G45704)
6 - Brake booster
7 - Brake master cylinder
8 - Brake pedal
9 - Brake pedal travel sensor

The diaphragm-type power brake booster:



The diaphragm-type power brake booster is self contained and is mounted on the engine side of the bulkhead. It uses engine intake manifold vacuum and atmospheric pressure for its assistance and utilizes a non-return valve to preserve vacuum.