Land Rover Anti Lock Control Traction Control Rover Manual

COMPONENT LOCATIONS - 4.0L
NOTE: RHD shown, LHD similar
Brake booster1
Vacuum pump relay2
Vacuum pump3
Vacuum pipe connections to vacuum pump and
inlet manifold
4
Check valve5
Vacuum pipe connection to brake booster6
Vacuum pipes7
(G421077) Technical Training128
Lesson 2 – ChassisBrake Booster 

COMPONENT LOCATIONS - 4.4L
NOTE: LHD shown, RHD similar
Vacuum pump relay1
Brake booster2
Vacuum pump3
Vacuum pipe connection to brake booster4
Check valve5
Vacuum pipe connection to vacuum pump6
Vacuum pipes7
Vacuum pipe connection to inlet manifold8
Brake BoosterLesson 2 – Chassis
129Technical Training (G421077) 

COMPONENT LOCATIONS - 2.7L DIESEL
NOTE: LHD shown
Vacuum pump1
Brake booster2
Vacuum pipe connection to brake booster
(includes check valve)
3
Vacuum pipe connection to vacuum pump4
Vacuum pipes5
(G421077) Technical Training130
Lesson 2 – ChassisBrake Booster 

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...

VACUUM PUMP (4.0L AND 4.4L)
Anti-vibration mount1
Pump cover2
Vacuum pump inlet3
Rubber shroud for exhaust port4
Motor cover5
Electrical connector6
On petrol models the electric vacuum pump supplements
the main vacuum supply from the engine manifold.
The vacuum pump is installed on a mounting bracket
in the front left corner of the engine compartment. Two
anti-vibration mounts on the vacuum pump are located
on studs on the mounting bracket and secured with nuts.
The vacuum pump consists of a radial vane...

VACUUM PUMP (2.7L DIESEL)
Vacuum connection (not used)1
Vacuum connection for brake booster2
Drive dog3
Seal4
Oil inlet port5
Oil return/air vent6
A vacuum pump is installed on diesel models as the air
inlet system does not produce sufficient vacuum for
satisfactory operation of the brake booster.
The vacuum pump is a radial vane pump which is
attached to the rear of the RH cylinder head and driven
at half engine speed by the exhaust camshaft. The
vacuum pipe from the brake booster connects to an
elbow...

VACUUM PUMP CONTROL DIAGRAM (4.0L AND 4.4L)
NOTE: A = Hardwired connection
Battery1
Fuse 24E, battery junction box2
Vacuum pump relay3
Vacuum pump4
Engine control module5
(G421077) Technical Training134
Lesson 2 – ChassisBrake Booster 

New Product Introduction
2005.0 Discovery 3
Description and Operation
Technical Training en 05/2004 

To the best of our knowledge, the illustrations, technical information, data and descriptions in this issue were correct at the time
of going to print. The right to change prices, specifications, equipment and maintenance instructions at any time without notice
is reserved as part of our policy of continuous development and improvement for the benefit of our customers.
No part of this publication may be reproduced, stored in a data processing system or transmitted in any form, electronic,
mechanical,...

PAGE
Lesson 1 – General Information
Lesson 2 – Chassis
9Objectives....................................................................................................................................................
11Front  Suspension...........................................................................................................................................