S-class W202 Mercedes
1993-2000 of release
Repair and car operation
+ 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
+ 9.1.2. Check of thickness of a disk of coupling in the mounted condition
+ 9.2. Mechanical and automatic boxes of gear shifting
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes
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Coupling consists of a press disk of coupling, a coupling disk (a conducted disk) and a hydraulic control system. Press and conducted disks are located on an engine flywheel.
Press the disk of coupling is connected to a flywheel which is screwed together with cranked shaft of the engine. Between a press disk of coupling which is squeezed out by a press disk of coupling to a flywheel. The conducted disk is aligned by gear primary shaft of a transmission.
At a nazhimaniye the foot on a coupling pedal (coupling squeezing) by means of the cylinder sensor creates pressure and via the hydraulic pipeline is transferred to the distributive cylinder of the coupling which has been screwed together with the transfer mechanism. The piston of the cylinder of the switching center by means of a fork of switching off of coupling squeezes out the bearing of the coupling of switching off of coupling in the direction to a tarelchaty spring of a press disk and slightly raises it. Thanks to it there is free a coupling disk between a flywheel and a press disk, and communication between the engine and a transmission thus is liquidated.
If the pedal of coupling comes back back to the top situation (coupling inclusion), press the disk squeezes out a conducted disk of coupling to a flywheel. Power short circuit as the pressed conducted disk of coupling is rigidly connected by means of gear gearing with transmission shaft is again formed.
At inclusion and coupling switching off because of easy process of a proskalzyvaniye the frictional overlay of a conducted disk is a little used up. Therefore, the conducted disk of coupling is a fast-wearing-out detail, however average term of its service makes more than 100 000 kilometers of run of the car. Wear depends substantially on loading (for example, car operation with the trailer) and from a movement mode. Coupling does not demand maintenance.
Engines in volume of 2,0 l with the conditioner, and also volume of 2,2 and 2,8 l are equipped with a two-case flywheel. The two-case flywheel has spring and amortization system to reduce transfer of the krutilny fluctuations developed by the engine. Thanks to it noise transfer in the bottom range of frequency of rotation in addition decreases. The coupling disk for this flywheel consists in addition of a nave, a zakhvatny guard and a frictional overlay of coupling. Press the disk and the bearing of the coupling of switching off of coupling are also adjusted to the changed conditions of placement.