Jaguar XJ (X350). Manual — part 232

Brake Booster

COMPONENT LOCATION

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.

Item

Part Number

Description

1

Brake fluid reservoir cap

2

Brake fluid level sensor

3

Brake fluid reservoir

4

Brake booster

5

Brake pedal

6

Brake vacuum sensor (3.0L and 3.5L)

7

Non return valve/vacuum supply

8

Brake master cylinder

OVERVIEW

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.

Diagnosis and testing

Power Brake System

For additional information, refer to

<<206-00>>

.

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Removal and installation

Brake Booster (70.50.17)

Removal

All vehicles

1 . Remove the brake master cylinder.

For additional information, refer to

Brake Master Cylinder - 3.0L/3.5L/4.2L (70.30.08)

Vehicles built up to VIN:G45703

2

.

Disconnect the brake booster pedal travel sensor and brake booster solenoid electrical

connectors.

Vehicles built from VIN:G45704

NOTE:

Vehicles with 3.0L and 3.5L engines.

3 . Disconnect the brake booster vacuum sensor electrical connector.

All vehicles

4 . Remove the brake booster retaining nut.

5

.

NOTE:

The non-return valve and vacuum pipe assembly should be removed with the brake

booster.

NOTE:

Remove and discard the brake booster/pedal box gasket.

Remove the brake booster.

Installation

1

.

NOTE:

When renewing the brake booster, the non-return valve and vacuum pipe assembly

should be installed prior to the brake booster installation.

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