Front Disc Brake Land Rover Range Rover L322

SPECIFICATIONS

TORQUE SPECIFICATIONS VEHICLES WITHOUT BREMBO BRAKES

* New bolts must be installed

TORQUE SPECIFICATIONS VEHICLES WITH BREMBO BRAKES

* New bolts must be installed

Scheme 1

Scheme 2

All models feature ventilated front disc brakes. 4.4L V8 naturally aspirated vehicle use twin piston sliding calipers and brake discs. 4.2L V8 supercharged and TdV8 vehicles use 4 piston, opposed piston Brembo calipers and larger brake discs. These vehicles also have a mass damper attached to the top of each front suspension strut to improve noise, vibration and harshness (NVH) when braking. For additional information, refer to: Front Suspension - Description & Operation

On all models the brake caliper is attached to the rear of the hub. The brake pads are made from an asbestos free material. The inboard brake pad of the left front brake incorporates a wear sensor.

With the sliding calipers, when hydraulic pressure is supplied to the caliper, the pistons extend and force the inner pad against the brake disc. The caliper body reacts and slides on the guide pins to bring the outer pad into contact with the brake disc.

With the Brembo calipers, when hydraulic pressure is supplied to the caliper, the two pairs of opposed pistons extend in the caliper. The two pistons in each side of the caliper force their related brake pads against the brake disc.

The front brake pad wear sensor is connected in series with the rear brake pad wear sensor, in a circuit connected to the instrument cluster. 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 brake warning indicator (red), displays an appropriate warning in the message center and sounds a warning chime.

For additional information, refer to: Information and Message Center - Description & Operation

At the beginning of each ignition cycle, the instrument cluster performs a 2 second bulb check of the brake warning indicator. The indicator is illuminated amber for 1 second then red for 1 second.

REMOVAL

Scheme 3

Scheme 4

1. Raise and support the vehicle.
2. Remove the wheel and tire.
3. Release the brake caliper. Remove and discard the 2 bolts. Tie the brake caliper aside.
4. Remove the brake disc. Remove the Allen screw.

INSTALLATION

1. Make sure the brake disc and hub mating surfaces are clean.
2. Install the brake disc. Tighten the Allen screw to 16 Nm (12 lb.ft).
3. Install the brake caliper. Clean the component mating faces. Tighten the new bolts to 65 Nm (48 lb.ft), then a further 90 degrees.
4. Install the wheel and tire. Tighten the wheel nuts to 140 Nm (103 lb.ft).
5. Depress the brake pedal several times, check the fluid level in the brake fluid reservoir and top-up with brake fluid if necessary.

1. Raise and support the vehicle.
2. Remove the wheel and tire.
3. Release the brake caliper. Remove and discard the 2 bolts. Tie the brake caliper aside.
4. Remove the brake disc. Remove the Allen screw.

1. Make sure the brake disc and hub mating surfaces are clean.
2. Install the brake disc. Tighten the Allen screw to 16 Nm (12 lb.ft).
3. Install the brake caliper. Clean the component mating faces. Tighten the new bolts to 65 Nm (48 lb.ft), then a further 90 degrees.
4. Install the wheel and tire Tighten the wheel nuts to 140 Nm (103 lb.ft).
5. Depress the brake pedal several times, check the fluid level in the brake fluid reservoir and top-up with brake fluid if necessary.

Scheme 5

Scheme 6

1. Raise and support the vehicle.
2. Remove the wheels and tires.
3. LH side only: Disconnect the brake pad wear indicator sensor.
4. Remove the brake caliper lower bolt.
5. Remove the brake pads. Rotate the brake caliper upwards. Remove the 2 clips.

1. Clean the caliper housing and anchor plate using brake cleaning fluid.
2. Inspect the caliper piston and slide pin seals for damage.
3. Check the slide pins for correct operation.
4. Position a bleed jar containing a small quantity of approved brake fluid. Connect the bleed tube to the bleed screw and loosen the screw.
5. Press the pistons into the caliper housing. Tighten the bleed screw to 14 Nm (10 lb.ft).
6. Disconnect the bleed tube and remove the jar.
7. Install the brake pads. Install the 2 clips.
8. Rotate the brake caliper downwards. Tighten the bolt to 32 Nm (24 lb.ft).
9. Connect the brake pad wear indicator sensor.
10. Install the wheels and tires. Tighten the wheel nuts to 140 Nm (103 lb.ft).
11. Repeat the above procedure for the other side.
12. Depress the brake pedal several times, check the fluid level in the brake fluid reservoir and top-up with brake fluid if necessary.

Scheme 7

Scheme 8

1. Raise and support the vehicle.
2. Remove the wheels and tires.
3. LH side only: Disconnect the brake pad wear indicator sensor. Release the lead from the clip.
4. Remove the brake pads. Remove the 2 retaining pins. Remove the anti-rattle spring. Withdraw the brake pads.
5. Repeat the above procedure for the other side.

1. Clean the components.
2. Inspect the caliper piston seals for damage.
3. Position a bleed jar containing a small quantity of approved brake fluid. Connect the bleed tube to the bleed screw and loosen the screw.
4. Press the pistons into the caliper housing. Tighten the bleed screw to 19 Nm (14 lb.ft).
5. Repeat the above process for the other 2 pistons.
6. Disconnect the bleed tube and remove the jar.
7. Install the brake pads. Position the anti-rattle spring. Install the pins, making sure the pin collets are fully engaged in the caliper.
8. LH side only: Connect the brake pad wear indicator sensor. Secure the lead in the clip.
9. Repeat the above procedure for the other side.
10. Install the wheels and tires. Tighten the wheel nuts to 140 Nm (103 lb.ft).
11. Depress the brake pedal several times, check the fluid level in the brake fluid reservoir and top-up with brake fluid if necessary.

Scheme 9

Scheme 10

Scheme 11

1. Raise and support the vehicle.
2. Remove the wheel and tire.
3. LH side only: Disconnect the brake pad wear indicator sensor. Release from the clip.
4. Remove the brake caliper lower bolt.
5. Disconnect the brake hose from the brake caliper. Remove the union. Remove and discard the two sealing washers. Install blanking caps to the exposed ports.
6. Remove the brake pads. Rotate the brake caliper upwards. Remove the two clips.
7. Remove the brake caliper housing. Remove the brake caliper upper bolt.

1. Clean the caliper housing and anchor plate using brake cleaning fluid.
2. Check the caliper slide pins. Check for correct operation. Check the condition of the caliper slide pin seals.
3. Install the brake caliper. Tighten the brake caliper upper bolt to 35 Nm (26 lb.ft).
4. Install the brake pads. Install the two clips.
5. Secure the brake caliper. Rotate the brake caliper downwards. Tighten the brake caliper lower bolt to 35 Nm (26 lb.ft).
6. Connect the brake hose to the brake caliper. Clean the component mating faces. Remove the blanking caps from the ports. Install new sealing washers. Tighten the brake hose union to 32 Nm (24 lb.ft).
7. LH side only: Connect the brake pad wear indicator sensor. Secure in the clip.
8. Bleed the brake system.
9. Install the wheel and tire. Tighten the wheel nuts to 140 Nm (103 lb.ft).

Scheme 12

1. Raise and support the vehicle.
2. Remove the wheel and tire.
3. LH side only: Disconnect the brake pad wear indicator sensor. Release the lead from the clips.
4. Remove the brake pads. Remove the 2 retaining pins. Remove the anti-rattle spring. Withdraw the brake pads.
5. Disconnect the brake hose from the brake caliper. Remove the union. Remove and discard the 2 sealing washers.
6. Remove the brake caliper. Remove and discard the 2 bolts.

1. Clean the components.
2. Inspect the caliper piston seals for damage.
3. Install the brake caliper. Tighten the new bolts to 65 Nm (48 lb.ft), then a further 90 degrees.
4. Connect the brake hose to the brake caliper. Clean the component mating faces. Install new sealing washers. Tighten the brake hose union to 32 Nm (24 lb.ft).
5. Position a bleed jar containing a small quantity of approved brake fluid. Connect the bleed tube to the bleed screw and loosen the screw.
6. Press the pistons into the caliper housing. Tighten the bleed screw to 19 Nm (14 lb.ft).
7. Repeat the above process for the other 2 pistons.
8. Disconnect the bleed tube and remove the jar.
9. Install the brake pads. Install the anti-rattle spring. Install the pins, making sure the pin collets are fully engaged in the caliper.
10. LH side only: Connect the brake pad wear indicator sensor. Secure the lead in the clips.
11. Bleed the brake system.
12. Install the wheel and tire. Tighten the wheel nuts to 140 Nm (103 lb.ft).
13. Depress the brake pedal several times, check the fluid level in the brake fluid reservoir and top-up with brake fluid if necessary.

See also:
• Front Suspension - Description & Operation
• Information and Message Center - Description & Operation