LR3/Disco 3
GENERAL
The front brakes each consist of a twin piston brake caliper, a ventilated brake disc and a dust shield. 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 is common on
all derivatives.
The brake caliper is attached to the rear of the front knuckle. The brake pads are made from an asbestos free material.
The inboard brake pad of the left front brake incorporates a wear sensor.
When hydraulic pressure is supplied to the caliper, the pistons extend and force 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 front brake pad wear sensor is connected in series with the rear 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, red for 1.5 seconds, then goes off.
14
-
Piston dust cover (x 2)
15
-
Brake pad
16
-
Brake pad retainers
17
-
Caliper carrier
18
-
Brake disc retaining bolt
19
-
Brake disc
20
-
Hub bearing assembly
21
-
Dust shield screw (x 5)
22
-
Dust shield
23
-
Front knuckle
