Mercedes S-class W202

1993-2000 of release

Repair and car operation

Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
- 12. Brake system
   12.2. Antiblocking system – ABS
   12.3. The additional equipment – system ASR
   12.4. Specifications of brake system
   12.5. Overlays of lobbies brake колодок
   - 12.6. Overlays of back disk brakes
      12.6.1. Check of a thickness of brake disks and their lateral palpation
   12.7. A support
   12.8. A forward brake disk
   12.9. A back brake disk
   12.10. A brake liquid
   12.11. Removal of air from brake system
   12.12. Brake pipelines / hoses
   12.13. Replacement of brake highways
   12.14. Brake колодки a lay brake
   12.15. Adjustment of a lay brake
   12.16. The stoplight switch
   12.17. Diagnostics of malfunctions of brakes
   + 12.18. Wheels and tyres
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes

12.6. Overlays of back disk brakes Removal

1. Mark with a paint position of back wheels concerning a nave. Thanks to it отбалансированное the wheel after removal can be put on the place that balancing was not broke. Release wheel bolts, without lifting the car, then Raise behind the car and remove back wheels.
The prevention

Change by places of internal and external overlays, and also overlays of the left wheel with overlays right – is inadmissible. It can lead to non-uniform action of brakes. All overlays of one axis vary simultaneously.

2. Only cars with system ASR (антипробуксовочной system): take a wire of the gauge of deterioration (S10) from штекерного connections (S10/3x1). Thus do not pull for a wire.
3. Beat out keeping pins (41) of a support (32) suitable punch.
4. Remove крестовидные springs.
5. Get overlays with the help выжимного the lever, flat-nose pliers or a screw-driver If overlays приржавели, the special stripper, for example, firms HAZET is necessary.


The prevention

At the removed overlays do not press a brake pedal, differently brake pistons will jump out of the case. If through an oversight it has occurred, remove a support and collect it in a specialised workshop.

1. Clear directing surfaces, accordingly, a place of landing of overlays in mine of the case suitable for this purpose a brush from soft metal and a vacuum cleaner, or wipe a rag with spirit. Do not apply for this purpose the means containing mineral oil or the tool with sharp edges.
2. Before installation of overlays feel a brake disk fingers about roughnesses, measure a thickness of a disk.
3. Check up пыльник (45) on cracks. Damaged пыльник urgently replace, since проникшая the dirt quickly puts out of action a support. The brake mechanism with fixed скобой thus should be removed and disassembled in a specialised workshop.
4. Besiege both brake pistons спецприспособлением (031). The piece of wood (the hammer handle) will descend also, however thus especially watch to warping pistons and not to damage a surface of pistons and пыльники.

The prevention

At осаживании pistons the brake liquid is squeezed out from brake cylinders in a broad tank. Observe of liquid level in a tank, it is desirable to suck away a brake liquid a siphon.

5. For отсоса apply a plastic bottle in which there was only a brake liquid. Do not apply drinking bottles. The brake liquid is poisonous, and it cannot be sucked away a mouth. Apply soaking up siphon. After change of overlays level of a brake liquid should not exceed the maximum mark as because of thermal expansion the 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.
The prevention

At the big deterioration of overlays check up ease of a course of pistons. For this purpose insert into a support suitable wooden брусок and ask the assistant to press a brake pedal slowly. Brake pistons should come to light and precipitate easily back. For check there should be a second overlay in the collected opposite support.

6. Check up 20-degree position of the piston. In specialised workshops for this purpose apply a template. As a rule, at removal of overlays it is not necessary to turn pistons! Then adjustment is not obligatory.
7. Make a template of a cardboard or a tin according to the drawing.
8. The long party of a template should adjoin to a support of a back wheel. The brake piston has a ledge. This ledge the piston should adjoin to the slanting party of a template, otherwise turn the piston.
9. Impose a template on the bottom directing plane in a support. Piston position correct if the adjoining party (position in 20 ) coincides with piston ledges. In case of need cautiously turn the piston a screw-driver. To prevent peep of disk brakes, grease an underside of a brake overlay, and also lateral faces of its basis with a thin layer of greasing.
10. Clear directing overlays in a support by means of suitable for this purpose a wire brush. Thus do not damage пыльник the piston.
11. Insert overlays into a support.
12. Only for cars with system ASR: Put deterioration gauges on both overlays. A gauge wire curtail a spiral and connect to the tip on a support. It is authorised to put gauges only in transparent heat-resistant execution.
13. Impose crosswise springs and hammer keeping pins.
The prevention

Pins and springs are subject to replacement.

14. Put wheels so that the marks put before their removal have coincided. Screw wheels. Remove the car from supports and tighten wheel bolts in a crosswise order with the moment 110 Н.м.
The prevention

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

15. Check up level of a brake liquid in a tank, if necessary add to the maximum mark.
16. Cautiously grind in new brake overlays. For this purpose repeatedly, having dispersed the car to 80 km/h, затормаживайте it till the speed of 40 km/h at not strong pressure upon a pedal. Between braking allow to brakes to cool down a little.
The prevention

Before run in 200 km avoid emergency braking.

17. Overlays brake колодок are special utility refuse and in each case before them to throw out, it is necessary to learn, whether it is authorised.