Dry type single plate clutch design with diaphragm spring
1 - Flywheel; 2 - Driven clutch disc; 3 - Clutch basket with pressure plate; 4 - Fixing bolt (internal hexagon)
The clutch consists of a basket with a pressure plate, driven plate, release bearing (RKPP 717.4) /central operator (RKPP 716.6), fork clutch release lever (RKPP 717.4) and hydraulic drive.
The clutch basket is bolted to the flywheel attached to the crankshaft of the engine. Between the pressure plate and the flywheel, a clutch driven disk equipped with friction linings is placed, pressed against the working surface of the flywheel by diaphragm springs of the pressure disk. The driven clutch disc is centered relative to the manual transmission input shaft by means of a splined connection.
When the clutch pedal is depressed, the release bearing, under the force developed by hydraulic pressure through the forked clutch release lever, presses the diaphragm spring of the pressure plate, releasing the driven disk, which ceases to be pressed against the working surface of the flywheel and, accordingly, transmit the torque developed by the engine to the input shaft of the gearbox.
The clutch drive on all models is hydraulic. As a working fluid, brake fluid is used, taken from a reservoir common with the brake system.
Each engagement of the clutch is associated with wear of the friction linings of the driven disk, which is one of the consumable components of the assembly. The average service life of the driven disk is over 100,000 km. The intensity of wear depends on the operating conditions of the vehicle (trailer driving) and driving style of the owner. On models equipped with a two-section flywheel with a spring-damping assembly that absorbs torsional vibrations, the clutch is adjusted automatically and there is no need for additional adjustments.
Note. The clutch disc on models with a two-piece flywheel is not equipped with torsion springs.
Another advantage of cars equipped with two-section flywheels is the reduced noise background at low engine speeds.