LR3/Disco 3
BRAKE BOOSTER
The brake booster is installed in the driver side of the engine compartment, on the engine bulkhead.
The brake booster is a dual diaphragm unit with a boost ratio of 7.0 : 1. The input push rod is connected to the brake
pedal. The output push rod locates in the primary piston of the brake master cylinder. A vacuum pipe, installed in a
grommet in the front face of the housing, connects the brake booster to the intake manifold and electric vacuum pump
(petrol models) or the engine driven vacuum pump (diesel models).
VACUUM PUMP (4.0L AND 4.4L)
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.
Item Part Number
Description
1
-
Anti-vibration mount
2
-
Pump cover
3
-
Vacuum pump inlet
4
-
Rubber shroud for exhaust port
5
-
Motor cover
6
-
Electrical connector
