Location of elements
NOTE: Front disc brake shown for I6 gasoline engine; the front disc brake of the TD4 diesel engine is similar.
Pos. | spare part no | Name |
1 | - | Anti-lock brake sensor wire (ABS) |
2 | - | ABS sensor fixing screw |
3 | - | dust shield |
4 | - | Dust shield fixing screw (3 pcs.) |
5 | - | Brake disk |
6 | - | Brake disc mounting screw |
7 | - | External padding that eliminates squealing |
8 | - | External brake shoe |
9 | - | Internal brake lining |
10 | - | Internal padding that eliminates squeal |
11 | - | Caliper body spring |
12 | - | Fixed holder |
13 | - | Caliper Piston Seal |
14 | - | caliper piston |
15 | - | Movable caliper |
16 | - | Bush Bolt Rubber Boot (2 pcs.) |
17 | - | Sleeve bolt (2 pcs.) |
18 | - | Sleeve Bolt Dust Cover (2 pcs.) |
19 | - | Caliper Pressure Relief Screw |
20 | - | Pressure relief screw cover |
21 | - | flexible hose |
22 | - | Fixed holder mounting bolt (2 pcs.) |
23 | - | Steering knuckle left front wheel |
The front brake assembly features a ventilated brake disc and a cast iron single acting piston caliper.
Brake disk
Pos. | spare part no | Name |
A | - | Front brake disc - i6 petrol vehicle |
B | - | Front brake disc - TD4 diesel vehicle |
The brake disc fitted to a 3.2L i6 petrol engine measures 316mm x 28mm.
The brake disc fitted to a vehicle with a 2.2 liter TD4 petrol engine measures 300 x 28 mm.
The brake disc is fixed to the wheel knuckle hub with one screw and is also held by five wheel nuts.
The front brake discs of both sizes have ventilation ducts, so that the discs have high thermal stability even under heavy braking. The disc is cooled when, as the vehicle moves forward, air is drawn in through the vents and flows along the surfaces of the disc.
Caliper assembly
#img3#
Pos. | spare part no | Name |
A | - | Front brake caliper - i6 petrol vehicle |
B | - | Front brake caliper - TD4 diesel vehicle |
The caliper assembly includes a fixed support bracket and a floating caliper. The fixed support bracket is mounted to wrap around the brake disc. The bracket is attached with two bolts to the steering knuckle. The fixed support bracket serves to accommodate two brake pads that are mounted on both sides of the brake disc. The bracket has guide channels that allow the brake pads to move in the direction of the disc.
NOTE: The two bolts in the fixed support bracket are pre-applied with a thread locking compound that should not be used for service. Use new fixed support bracket bolts, "old" bolts should be discarded.
A floating caliper is installed above the fixed support bracket, inside which two brake pads are held. The floating caliper is mounted on a fixed support bracket with two bolts with bushings. It forms a hydraulic chamber containing a 60 mm diameter piston and an O-ring.
The floating caliper is connected by a flexible hose to the hydraulic brake system. It has a maintenance air bleed screw.
The two bushed bolts are machined to a quality finish and protected from dirt and moisture by a deformable rubber boot. Bushed bolts allow limited lateral movement of the floating calipers along the fixed support bracket.
On the outer side of the brake disc there is a spring housing, which is connected by means of special hooks between the fixed support bracket and the caliper. When the brakes are applied, the spring is tensioned as the caliper moves towards the brake disc. The spring facilitates the movement of the caliper away from the brake disc when the brakes are released.
A shim is installed on the outer edge of each brake pad and enhances NVH performance (noise, vibration and harshness) brake elements during system operation. Brake pads are not equipped with pad wear sensors.
Dust guard brake
The brake dust shield is located between the wheel knuckle and the brake disc and is attached to the knuckle with three screws. The brake dust shield faces the appropriate side of the vehicle and protects the brake elements from rock strikes across the axle. The brake dust shield also prevents brake dirt and dust from spreading to other parts of the vehicle.
Comments on this article