LR3/Disco 3
GENERAL
The rear brakes each consist of a single piston brake caliper, a ventilated brake disc and a dust shield (integrated as part
of the parking brake). 4.4L models feature a different caliper and a larger diameter brake disc than the 4.0L and 2.7L
Diesel models. The dust shield and parking brake are common on all derivatives.
The brake caliper is attached to the rear of the rear knuckle. The brake pads are made from an asbestos free material.
The inboard brake pad of the right rear brake incorporates a wear sensor.
When hydraulic pressure is supplied to the caliper, the piston extends and forces the inner pad against the disc. The
caliper body reacts and slides on the guide pins to bring the outer pad into contact with the disc.
The rear brake pad wear sensor is connected in series with the front brake pad wear sensor, between the instrument
cluster and ground. When a brake pad incorporating a brake pad wear sensor is approximately 75% worn, the brake pad
wear sensor goes open circuit. When the instrument cluster detects the open circuit, it illuminates the amber Light
Emitting Diode (LED) in the brake warning indicator. Vehicles with the high line instrument cluster also display an
appropriate warning in the message center and sound a warning chime. For additional information, refer to
Instrument
Cluster
(413-01 Instrument Cluster)
At the beginning of each ignition cycle, the instrument cluster performs a bulb check on the brake warning indicator: the
indicator is illuminated amber for 1.5 seconds, then red for 1.5 seconds.
12
-
Caliper carrier
13
-
Guide pin dust cover (x 2)
14
-
Guide pin (x 2)
15
-
Brake pad
16
-
Piston seal
17
-
Piston
18
-
Piston dust cover
19
-
Bleed screw
20
-
Bleed screw dust cap
21
-
Guide pin bolt (x 2)
22
-
Caliper body
