E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
- 9. Coupling
   9.2. Specifications
   9.3. Coupling check
   9.4. Main cylinder of coupling
   9.5. Coupling pedal
   9.6. The blocking switch of coupling
   9.7. Working cylinder of coupling
   9.8. Air removal from a coupling hydraulic actuator
   9.9. Coupling details
   9.10. Driveshaft
   9.11. Elastic coupling
   9.12. Average support
   9.13. Kardannye hinges
   9.14. The forward aligning plug
   9.15. Driveshaft CV JOINT
   9.16. Semi-axes
   9.17. CV JOINTS and covers
   9.18. Epiploons of a reducer of a back axis
   9.19. Reducer of a back axis
   9.20. Epiploon of a leading gear wheel of a reducer
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice

9.3. Coupling check



1. Press disk
2. Frictional disk
3. Lever of switching off of coupling
4. Vyzhimna bearing
5. Spherical hinge
6. Spring
7. Bolt


1. Flywheel
2. Frictional disk
3. Press disk and coupling casing
4. Vyzhimna bearing
5. To a nutritious tank
6. Main cylinder of switching off of coupling
7. The union for air removal
8. Working cylinder of switching off of coupling
9. Pusher
10. Lever
11. Lever of a press disk
12. The directing bearing
13. Crankshaft
14. Bolt of fastening of a flywheel

Coupling dry, one-disk, with a diafragmenny press spring and a hydraulic actuator.


It is recommended to execute the following preliminary checks which allow to define a condition of coupling and wear of its details.

1. Check liquid level, if necessary restore (if the tank is empty, add liquid and pump over a hydraulic actuator). Define the leak reason.
2. For check of pro-slipping of coupling press a pedal idling the engine and some seconds later include a reverse gear. The gnash will indicate the strengthened wear of press or frictional disks.
3. Check completeness of switching off of coupling. For this purpose on the working engine press a coupling pedal so that the pedal did not reach a floor on 6 mm. Be several times switched from the 1st transfer to the back. The complicated switching indicates wear of details. Check a course of a rod of the working cylinder at completely pressed pedal. For this purpose insert into a special crack a metal strip and press to a rod.
4. Ask the assistant to press a pedal and to release, – the strip thus leaves the scratch which length is equal to a rod course. The course of a rod should be equal 20 mm. If the course is small, air hit, a podtekaniye of consolidations of the cylinder, or jamming of a disk of coupling on primary to a check point shaft can be the reason.
5. Check a condition of the plug of an axis of a pedal, be convinced that the pedal freely moves.