Subaru Legacy

since 1990-1998 release

Repair and operation of the car

Subaru Legacy
+ 1.1. Identification numbers
+ 2. Maintenance
+ 3. Engines
+ 4. Heating, ventilation
+ 5. Fuel system
+ 6. Exhaust system
+ 7. Systems of start, ignition
+ 8. Transmissions
- 9. Coupling, shaft
   9.1. Technical characteristics
   - 9.2. Coupling
      9.2.1. Coupling cable
      9.2.2. Main cylinder of coupling
      9.2.3. Working cylinder of coupling
      9.2.4. Clutch plate
      9.2.5. Release bearing
      9.2.6. Replacement of the needle bearing of an output shaft of the transmission
      9.2.7. Removal of air from hydraulic system of coupling
      9.2.8. The switch of blocking of a starter on a coupling pedal
   + 9.3. Driveshaft
   + 9.4. Power shafts
+ 10. Brake system
+ 11. Suspension bracket
+ 12. Steering
+ 13. Body
+ 14. Electric equipment


9.2. Coupling


Coupling with the hydraulic drive

1 – spring forelock
2 – pin
3 – main cylinder of coupling
4 – arm
5 – hose
6 – working cylinder of coupling
7 – protective cover
8 – squeezing lever
9 – release bearing
10 – stopper
11 – shaft of the squeezing lever
12 – press disk
13 – clutch plate
14 – flywheel

Coupling with the hummock drive

1 – coupling cable arm
2 – coupling cable arm
3 – protective cover
4 – a lever support with a spherical head
5 – spring
6 – coupling switching off fork
7 – spring bracket
8 – holder of the release bearing
9 – release bearing
10 – protective cover
11 – spring
12 – a lever support with a spherical head
13 – coupling switching off fork
14 – release bearing
15 – press disk
16 – clutch plate
17 – forelock
18 – pin

Coupling is intended for short-term separation of the engine and transmission at gear shifting or braking and their smooth connection at start-off of the car from the place, and also for protection of details of transmission from dynamic loadings.

Coupling is one-disk, dry constantly closed type with the central press spring and a quencher of tortional fluctuations on the conducted disk. In a case of the transmission the main shaft of the transmission on which the bearing which is not demanding maintenance settles down press acts, and outside of a case the lever of switching off of coupling to which the coupling cable fastens is located.

The principle of action of coupling is based on torque transmission from a flywheel and the leading part of coupling on the conducted disk, so, and on a main shaft of the transmission at the expense of friction forces which arise between disks at the included coupling. Due to elasticity of a press spring press the disk clamps in this situation among themselves and a flywheel the conducted disk with the effort which is not allowing its pro-slipping. At the same time press the bearing and a press spring do not adjoin. When pressing a coupling pedal through a cable of coupling or the hydraulic drive and a fork, the release bearing presses a press spring of a drive plate of coupling and wrings out a drive plate from a flywheel therefore the conducted disk is released and torque transmission between the engine and the transmission stops.

The leading part of coupling fastens bolts to a flywheel. The conducted clutch plate is located between a press disk and the surface of friction of a flywheel. The nave of the conducted clutch plate is established on an entrance shaft of the transmission and freely moves on shaft grooves.

In the hydraulic drive of coupling brake fluid is applied.