 printable version
Replacing the front brake pads
Only the use of original or company (eg, ATE) spare parts can guarantee the preservation of the required braking distance, the life of these parts and the lack of scratches. Shoe Covers are made with varying degrees of hardness. For example, taxis are used for harder as more important life than optimal braking at high speed with a small pedal effort. Shoes for sports cars, by contrast, are softer. The company has a Mercedes in the course of numerous tests specifically for the car developed a balance between life and level of comfort when braking. Each replacement pads should consider the following: 1. Replace all four pads should be a single axis to the braking performance remains uniform. 2. You should check the wear and condition of the brake discs. They should not have scratches or deep scratches (see. "Replacing the brake disc"). 3. It is necessary to check the condition of the protective anther, and as the piston moves freely in the brake cylinder. 4. When removing the brake pads in any case do not press the brake pedal, otherwise the brake pistons come out of their holes.
1. Place the vehicle on the support and fix it. Remove the front wheel. 2. Hand pull out a support bracket, which slightly press the brake piston in the bore. 3. Use a screwdriver to pry off the plastic cover of the connector wear indicator. Remove the cover and remove the connector. 4. Press the retaining clip with a screwdriver from the caliper. 5. Remove the protective cap with a screwdriver guide pin.
| Fig. 8.13. Using the internal hex wrench to loosen and loosen the guide pins of the supports
|
6. Remove the guide pins (Fig. 8.13) of the upper and lower supports of a support holding the spanner hexagon slot near the rubber boot. 7. Remove the caliper and hang it on the wire so that the brake hose is not stretched.
| Fig. 8.14. The inner pad is mounted on the support piston (arrow) by a return spring. Thus, when the brake pedal is released, the brake disc once again gets a free wheeling
|
| Fig. 8.15. Replacing the front brake pads: 1 - a support bracket (removed and hung on the wire); 2 - external brake shoes; 3 - internal brake shoe (brake pads are removed from the bracket mounted on the inner block wear)
|
9. Remove the wear pads on the inside. 10. Remove the outer shoe bracket.
| Fig. 8.16. After a long operation of the details of a support and guide the brake pads are covered with dust. For proper operation before installing new pads, clean the bracket and caliper with a wire brush
|
11. Before assembly, clean the parts slide brush bristles with soft metal (Fig. 8.16) or with a cloth moistened with alcohol. Do not use solvents or mineral tools with sharp edges. Brake dust deposition and corrosion on parts of a support can lead to uneven wear pad. 12. Check the condition of the brake piston Dirt cover. If damage is found, replace it, because the penetration of dirt will quickly lead to jamming of the piston.
| Fig. 8.17. Forcing the brake piston in a cylinder with a clamp. To prevent the piston from damage necessary to lay wooden blocks. You can also use the old block
|
13. Push the piston into the cylinder (Fig. 8.17). To do this, use a wooden mallet or a special clamp. It does not damage the surface of the piston or mud cover. 14. indentation piston brake fluid out of the cylinder will be forced into the tank. If you want to pump out the excess liquid. 15. Install the brake pads. 16. Install the wear. 17. Establish a support and tighten the new self-locking guide pins to 35 Nm. 18. Attach the protective cover on the guide pins. 19. Connect the sensor. Pay attention to the wiring, and close the cover of the connector. 20. Install the retaining bracket support. After installing the brackets in both holes fix it by pressing the support arm. Improper installation of brake pedal travel will increase. 21. Install the front wheel, lower the car and tighten the wheel bolts torque of 110 Nm. 22. Replace the brake pads on the other side of the car. 23. At the vehicle is stationary, repeatedly press the brake pedal pads to the correct posture. 24. Check the brake fluid level.
| 
