S-class W202 Mercedes

1993-2000 of release

Repair and car operation



W202 Mercedes
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
- 12. Brake system
   12.2. Anti-blocking system – ABS
   12.3. The additional equipment – ASR system
   12.4. Specifications of brake system
   12.5. Overlays of forward brake shoes
   + 12.6. Overlays of back disk brakes
   12.7. Support
   12.8. Forward brake disk
   12.9. Back brake disk
   12.10. Brake liquid
   12.11. Air removal from brake system
   12.12. Brake pipelines / hoses
   12.13. Replacement of brake highways
   12.14. Brake shoes of the parking brake
   12.15. Adjustment of the parking brake
   12.16. Stoplight switch
   12.17. Diagnostics of malfunctions of brakes
   + 12.18. Wheels and tires
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes


cbd b47c026d b47c026d

12.5. Overlays of forward brake shoes

Removal

PERFORMANCE ORDER
1. Mark with paint the provision of forward wheels concerning a nave. Thanks to it the otbalansirovanny wheel after removal can be put on the place that balancing was not broken. Release wheel bolts, without lifting the car, then put in front the car on supports and remove forward wheels.
2. Pull a hand a support of the brake mechanism outside owing to what brake pistons will a little be wrung out.
3. Open a cover (56) shtekerny connections for what raise a screw-driver holding lateral ledges a little. Be not overzealous thus.
4. Separate the tip (57) of a wire of the sensor of wear of slips (S10/1). Thus do not pull for a wire.
5. Unscrew the bottom fixing bolt of the case of the brake piston, holding directing bolt (37) rozhkovy key.
6. Cast away the case of pistons (34) up and a wire fasten it to a suspension bracket spring. At an otkidyvaniye watch that directing bolts were not bent. At all do not use the case of pistons to change an angle of rotation of operated wheels.
7. Take overlays of blocks (43) of a support of the brake mechanism. Additional components: 44-spring bracket; S10/1 – a wire of the sensor of wear.
8. Take the wear sensor from the slip basis. The sensor is usually on an external slip. In "taxi" updating the sensor costs on all slips.
9. If wire isolation was wiped, replace the sensor.
Prevention

Change by places of internal and external slips, and also overlays of the left wheel with overlays of the right – is inadmissible. She can lead to non-uniform action of brakes. All overlays of one axis change at the same time. Various wear of slips cannot cause claims. At a difference between thickness of the internal and external slip exceeding 2 mm, it is necessary to check after all directing bolts of a support on ease of a course and if necessary to replace them.


Installation


Prevention

At the removed slips do not press a brake pedal, differently brake pistons will jump out of the case. If through an oversight it occurred, remove a support and bring together him in a specialized workshop.


PERFORMANCE ORDER
1. Clear directing surfaces, a place of landing of a slip in mine of the case a brush suitable for this purpose from soft metal and the vacuum cleaner, or wipe a rag with alcohol. Do not apply for this purpose the means containing mineral oil or the tool with sharp edges. Before installation of slips feel a brake disk fingers about roughnesses, measure thickness of a disk.
2. Check a boot (45) on cracks. The damaged boot urgently replace, since getting dirt quickly puts out of action a support. The brake mechanism with a floating bracket should be thus removed and disassembled in a specialized workshop.
3. Besiege brake pistons the special adaptation (031). The piece of wood (the hammer handle) will descend also, however thus especially watch to warping the piston and not to damage a surface of pistons and boots.

Prevention

At an osazhivaniye of pistons brake liquid is squeezed out from brake cylinders in a broad tank. Watch liquid level in a tank. It is desirable to suck away brake liquid by means of a siphon.


4. To a suction apply the plastic bottle used for storage of only brake liquid. Do not apply drinking bottles. Brake liquid is poisonous, and it cannot be sucked away a mouth. Apply soaking-up siphon. After change of slips level of brake liquid should not exceed the maximum mark as because of thermal expansion liquid can be splashed out from a tank. The flowed-out liquid, dripping from the main cylinder, corrodes a paint and varnish covering that conducts to corrosion.
Prevention

At big wear of slips check ease of a course of pistons. For this purpose insert into a support suitable wooden whetstone and ask the assistant to press a brake pedal slowly. Brake pistons should come to light and precipitate easily back. At check the second support should be collected. If through an oversight pistons jumped out or go hardly, it is necessary to remove a support and to bring together him in a specialized workshop.


5. The following stage of works is not obligatory: to prevent a scratch of brakes, it is necessary to grease slightly the back party and end faces of a basis of a slip (arrow) with lubricant means, for example, Plastilube, Tunap VC 582/S, Chevron SRJ/2, Liqui Moly LM-36 or LM-508-ASC. Greasing should not get on a slip at all or a brake disk. If necessary right there wipe lubricant paste, and a slip clear alcohol.
6. Insert both slips into a support. Thus watch that the spring bracket stood in parallel to the upper edge of a slip.
7. Put the wear sensor on an external slip.
8. Return the case of pistons to a starting position and screw on a guard new самоконтрящимся a bolt with the moment of 35 N of m. Thus directing bolt hold a rozhkovy key.
Prevention

Самоконтрящийся the fixing bolt can be applied only once.


9. Twirl a spiral wire of the sensor and connect in the shtekerny socket on a support. Close a tip cover.
10. Put forward wheels so that the marking put before their removal coincided. Take wheels. Lower the car, tighten wheel bolts in a crosswise order with the moment of 110 N of m.
Prevention

Vigorously repeatedly понажимайте on a brake pedal, will not feel yet strong resistance.


11. Check level of brake liquid in a tank, if necessary add to the maximum mark.
12. Carefully grind in new brake slips. For this purpose repeatedly, having dispersed the car to 80 km/h, затормаживайте it till speed of 40 km/h at weak pressure upon a pedal. Between braking let's to brakes cool down a little.
Prevention

Before run in 200 km avoid emergency braking.


13. Overlays of brake shoes are special utility refuse and in each case before them to throw out, it is necessary to learn, whether it is authorized.