BMW 3 of the E46 series

since 1998 release

Repair and operation of the car

BMW 3 of the E46 series
+ BMW 3 Cars (E46)
+ Current leaving and service
+ Engine
+ Cooling systems, heating
+ Power supply systems, injection and release
+ Electric equipment of the engine
+ RKPP and transmission line
+ Automatic transmission
- Coupling and power shafts
   - Coupling
      Removal and installation of coupling
      Removal and installation of the bearing of switching off of coupling
      Removal of air from the coupling drive
      Removal and installation of the working cylinder of coupling
   + Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment


1 — the conducted disk
2 — press a disk
3 — the coupling switching off bearing
4 — the coupling switching off lever

5 — a bolt
6 — a sharovy finger
7 — a spring bracket

On the considered models one-disk dry coupling with a diaphragm spring is established. Coupling at inclusion of transfers separates power communication between the engine and a check point and provides thanks to frictional communication a smooth torque transmission on a running gear at start-off from a place.

Coupling consists of a basket with a press disk, the conducted disk, the bearing of switching off of coupling with the hydraulic drive.

The basket of coupling is connected with a flywheel bolted connections. The flywheel is in turn connected with a cranked shaft of the engine. Between a press disk and a flywheel there is a conducted disk which nestles on a flywheel a diaphragm spring of a press disk. The conducted disk is connected with primary shaft of a check point through shlitsevy connection.

By pressing a pedal of coupling via the main cylinder to coupling pedals liquid under pressure is transferred to the working cylinder. The piston of the working cylinder, pressing the coupling switching off bearing, the disk influences on press. Thus the conducted disk is taken away from a flywheel. Power communication between the engine and a check point interrupts.

The hydraulic system of coupling works at the brake fluid arriving from the tank, the general with brake system.

At each inclusion and switching off of coupling power influence is resulted by wear of frictional overlays of the conducted disk. The conducted disk represents a high-wear part. However the average term of its service makes more

150 000 km. Wear of a disk depends generally on loading and style of driving. In particular, the start-off from a place when the long time slips coupling, or the movement in mountains with the trailer leads to coupling combustion. Coupling does not demand service, as it self-established.