E39 series BMW 5

since 1996-2001 of release

Repair and car operation

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
- Coupling and power shafts
   - Coupling
      Removal, installation and coupling check
      Air removal from a coupling hydraulic actuator
      Removal and installation of the mechanism of switching off of coupling
      Removal and installation of the working cylinder of coupling
   + Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Schemes
+ System of onboard diagnostics


General information

On considered models one-disk dry coupling with a diafragmenny spring is established.

Coupling in the car carries out two tasks: at inclusion of any transfer separates power communication between the engine and a check point, and, at a troganiye from a place, provides the frictional proskalzyvaniye excluding movement by breakthroughs.

1 — a conducted disk of coupling
2 — a coupling basket
3 — the bearing of switching off of coupling
4 — the lever of switching off of coupling
5 — a bolt
6 — a spherical support
7 — a spring bracket

Coupling consists of a basket with the press disk, a conducted disk and the mechanism of switching off of coupling.

The basket of coupling is connected by bolts with a flywheel which is in turn fixed on a flange of a cranked shaft of the engine. Between a press disk and a flywheel there is a conducted disk which nestles on a flywheel a press disk. The conducted disk of coupling is centered with primary shaft of a check point.

By pressing a coupling pedal the bearing of switching off of coupling through a hydraulic actuator and the lever presses a spring of a basket of coupling. Thereof the disk and a conducted disk is released press does not nestle any more on a flywheel. Power communication between the engine and a check point stops.

At all models coupling drive the hydraulic. The hydrosystem of coupling is supplied via the general tank with liquid of brake system.

At each inclusion and coupling switching off the frictional surface of a conducted disk partially wears out. The conducted disk is a wearing-out detail. However term of its service makes over 100 000 km of run. Wear generally depends on loading (operation with the trailer) and nature of driving. Coupling does not demand service. It being self-established.