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10.2.1. General information

General information

Assembly of coupling provides smooth perception of torque from a flywheel of the engine and its transfer on a main shaft of the transmission, and also a rupture of a stream of power at the gear shifting moments.

On all models equipped with RKPP one-disk coupling of dry type with a diaphragm spring is used. The nave of the frictional (conducted) clutch plate is equipped with the longitudinal vents entering gearing with vents of a pin of a main shaft of the transmission. Frictional and press clutch plates keep in contact with each other due to the effort developed by a diaphragm spring of a press disk.

Switching off of coupling is made in the hydraulic way. The drive of switching off consists of a pedal of the coupling connected to the GTTs tank (see the Head the Brake system) the main hydraulic cylinder, connecting lines and the executive cylinder, by means of a fork of switching off of coupling connected to the release bearing. When squeezing a pedal of coupling in a path of a hydraulic actuator pressure which resulting influence is put to the external end of a fork of switching off rises. At turn the fork rests fingers against the release bearing which, being displaced, nestles on petals of a diaphragm spring of a press disk in assembly of a basket of coupling. Being curved, the spring removes press and conducted disks from gearing, interrupting with that torque transmission from the engine to the transmission.

The coupling design applied on petrol models

1 — the Main cylinder
2 — the Executive cylinder
3 — a switching off Fork
4 — the Release bearing

5 — the Basket
6 — the Conducted (frictional) disk
7 — the Flywheel
8 — the Directing bearing
9 — the Connecting hose

The coupling design applied on diesel models

1 — the Main cylinder
2 — the Executive cylinder
3 — a switching off Fork
4 — the Release bearing

5 — the Basket
6 — the Conducted (frictional) disk
7 — the Flywheel
8 — the Directing bearing
9 — the Connecting hose

At coupling service, besides replacement of the components having obvious mechanical damages it is necessary to make some primary checks (it is supposed that the transmission is in good repair):