Land Rover Discovery: Hydraulic Brake Actuation / Description and Operation
COMPONENT LOCATION
NOTE:
Right Hand Drive (RHD) illustration shown, Left Hand Drive (LHD)
illustration similar.
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- Brake pedal
- Hydraulic pipes
- Integrated Hydraulic Control Unit (HCU) and Anti-lock Brake System (ABS)
module
- Brake master cylinder and fluid reservoir.
OVERVIEW
The hydraulic brake system is a diagonally split, dual circuit system and
consists of the brake pedal, brake master cylinder, fluid reservoir, Hydraulic
Control Unit (HCU) and the brake pipes and hoses.
The preformed rigid brake pipes distribute pressure from the master
cylinder to flexible hoses connected to the front and rear calipers, via the
integrated HCU and Anti-lock Brake System (ABS) control module.
DESCRIPTION
BRAKE PEDAL

- Brake pedal switch operating plate
- Brake pedal switch
The brake pedal is mounted in a bracket attached to the rear side of the
engine bulkhead. The brake pedal is connected to the brake booster push
rod with a clevis pin.
The brake pedal switch is mounted on the brake pedal bracket and
operated by a plate attached to the brake pedal. The brake pedal switch is
a combined switch, contains a stop lamp switch and a brake test switch in
one housing. Both switches are connected hardwired to the Central
Junction Box (CJB), to give independent signals of brake pedal operation.
READ NEXT:
Brake fluid reservoir cap
Brake fluid level switch
Brake fluid reservoir
Secondary circuit inlet port
Primary circuit inlet port
Brake master cylinder
Secondary circuit outlet port
Primary
Anti-lock Brake System (ABS) control module
Secondary circuit port
Left front caliper port
Right front caliper port
Primary circuit port
Left rear caliper port
Right rear caliper port
Hydra
CHECK
WARNING:
Chock the wheels and make sure that all personnel are clear of the
vehicle before carrying out the following procedure
NOTES:
To be carried out in the event that the vehicle has no el
SEE MORE:
This vehicle is equipped with an Event
Data Recorder (EDR). The main purpose
of an EDR is to record, in certain crash or
near crash-like situations, such as an airbag
deployment or hitting a road obstacle,
data that will assist in understanding how
a vehicle's systems performed. The EDR
is designed
Under no circumstances, should
any part of the fuel system be
dismantled or renewed by anyone
other than a suitably qualified
vehicle technician.
Make sure sparks and naked lights
are kept away from the engine
compartment.
Wear protective clothing,
including, where practical, gloves
made