Published: 11-May-2011
2007.0 Range Rover Sport (LS), 206-04
Rear Disc Brake (G427410)
| Item | Description |
|---|---|
| 1 | Brake pad wear sensor lead |
| 2 | Wheel speed sensor |
| 3 | Wheel speed sensor bolt |
| 4 | Caliper bolt (x 2) |
| 5 | Rear knuckle |
| 6 | Backplate assembly and dust shield |
| 7 | Dust shield screw (x 3) |
| 8 | Drive flange assembly |
| 9 | Brake disc |
| 10 | Brake disc retaining bolt |
| 11 | Brake pad retainers |
| 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 |
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). The 4.2L and 4.4L models feature a different caliper and a larger diameter brake disc than 2.7L diesel models. The dust shield and parking brake are common on all models.
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, displays an appropriate warning in the message center and sounds a warning chime. For additional information, refer to: Instrument Cluster (413-01 Instrument Cluster, Description and Operation).
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.