Jaguar XJ (X350). Manual — part 231

4 . Remove the brake master cylinder.

Remove and discard the O-ring seal.

Installation

1 . To install, reverse the removal procedure.

Install a new O-ring seal.

Tighten to 25 Nm.

2 . Tighten to 17 Nm.

206-07 : Power Brake Actuation

Specifications

Specifications

Torque Specifications

Description

Nm lb-ft lb-in

Brake booster retaining nuts

25 18 -

Brake vacuum pump retaining bolts 23 17 -

Brake vacuum pump retaining stud 13 10 -

Brake vacuum pump retaining nut 13 10 -

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Description and operation

Brake Booster

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 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:

•

Is self contained.

•

Is mounted on the engine side of the bulkhead.

•

Uses engine intake manifold vacuum and atmospheric pressure for its assistance.

•

Utilizes a non-return valve to preserve vacuum.

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