Coupling is located between the engine and the transmission and intended for separation and connection of the flywheel established on cranked to an engine shaft and a main shaft of the transmission.

Fig. 3.1. Preparation of pumping of the working cylinder of coupling: 1 – the union for pumping; 2 – clamp

On the cars equipped with the mechanical transmission dry one-disk coupling of diaphragm type (fig. 3.1) is used.

Before performance of any operations on coupling it is necessary to carry out several control actions to be convinced of malfunction of coupling.

First of all check liquid level in a tank, then – a condition of hoses and their connections. Examine coupling pedal plugs on existence of wear and reliability of fastening.