All models equipped with a manual transmission use a single-disk, dry-type clutch with a diaphragm spring. Slave hub (frictional) The clutch disc is equipped with longitudinal splines that engage with the splines of the trunnion of the gearbox input shaft. The friction and pressure plates of the clutch are held in contact with each other due to the force developed by the diaphragm spring of the pressure plate.
The clutch release drive can be carried out hydraulically, or by means of a drive cable.
In the first case, the clutch pedal is connected by means of a pusher to the master cylinder piston, and when it is squeezed out, hydraulic pressure rises in the system path, the resulting effect of which is applied through the connecting lines through the slave cylinder to the outer end of the clutch release lever. When the lever is turned, the fingers of its shaft rest against the release bearing, which, in turn, shifting, is pressed against the petals of the diaphragm spring of the pressure plate in the clutch basket. Bending, the spring breaks the contact of the pressure and driven discs, releasing the latter.
In the second case, the force exerted on the clutch pedal is transmitted to the release fork by means of a drive cable.
When servicing the clutch, in addition to replacing components that have obvious mechanical damage, some initial checks must be made (it is assumed that the gearbox is in good condition):
- a) The first step is to assess the fluid level in the clutch master cylinder reservoir (see chapter Settings and ongoing maintenance). If necessary, make appropriate adjustments by adding the required amount of hydraulic fluid and carefully inspect the system for signs of leaks. When emptying the master cylinder reservoir, it is necessary to remove air plugs from the hydraulic path, then check the clutch for proper functioning;
- b) Run the engine at normal idle to estimate clutch shift time. Make sure the gear is in neutral and release the clutch pedal. Now depress the clutch pedal and, after waiting a few seconds, engage reverse gear. Switching should not lead to a rattle and other extraneous noises, with a high degree of probability indicating a malfunction of the driven disk or clutch basket assembly;
- c) To check that the clutch is fully disengaged, apply the parking brake and start the engine. While holding the clutch pedal at a height of about 13 mm above the floor, shift the gearbox between first and reverse gears. The presence of interference when switching the lever indicates a malfunction of the components of the shutdown mechanism. Assess the stroke of the clutch slave cylinder. With the pedal fully depressed, the pusher should move forward by a noticeable amount, otherwise the hydraulic fluid level in the master cylinder should be checked;
- d) Perform a visual check of the condition of the axle bushings at the top of the clutch pedal. Make sure that there are no signs of jamming and excessive axle play;
- e) Climbing under the car, make sure that the clutch release lever is firmly seated on the ball pin of the spherical support.