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
   + 9.1.2. Check of a thickness of a disk of coupling in the mounted condition
   + 9.2. Mechanical and automatic boxes of a gear change
+ 10. A running gear
+ 11. A steering
+ 12. Brake system
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes

9. Transmission

9.1. Coupling

9.1.1. Introduction

1. A coupling disk
2. Press a disk
3. The bearing муфты coupling deenergizings
4. A plug of deenergizing of coupling
5. The screw with internal шестигранником, 25 Н.м.

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 coupling disk 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 нажимании by a foot on a coupling pedal (coupling squeezing) by means of the cylinder-gauge pressure is created and through the hydraulic pipeline is transferred to the distributive cylinder of the coupling which have been screwed together with the transfer mechanism. The piston of the cylinder of the switching centre by means of a plug of deenergizing of coupling squeezes out the bearing муфты coupling deenergizings in a direction to тарельчатой to a 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 coupling pedal comes back back in the top position (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 by means of gear gearing is rigidly connected with transmission shaft is again formed.

At inclusion and deenergizing of coupling because of easy process проскальзывания the frictional overlay of a conducted disk is a little used up. Hence, the conducted disk of coupling is быстроизнашивающейся a detail, however average term of its service makes more than 100 000 kilometres of run of the car. Deterioration depends substantially on loading (for example, operation of the car with the trailer) and from a movement mode. Coupling does not demand maintenance service.

Engines in volume of 2,0 l with the conditioner, and also volume 2,2 and 2,8 l are equipped by a two-case flywheel. The two-case flywheel has pruzhinno-amortisation system to reduce transfer крутильных the fluctuations developed by the engine. Thanks to it noise transfer to the bottom range of frequency of rotation in addition decreases. The disk of coupling for this flywheel consists in addition of a nave, захватного a guard and a frictional overlay of coupling. Press a disk and the bearing муфты coupling deenergizings also are adjusted to the changed conditions of placing.