Technical data
Data | Meaning |
clutch drive | Hydraulic |
Friction lining diameter (external x internal) | 215x145 mm |
Master cylinder inner diameter | 20.64 mm |
Internal diameter of the working cylinder | 15.87 mm |
Clutch disc thickness | 8,5±0,3 |
Clutch pedal free play | 6–13 mm |
Clutch travel | 145 mm |
Clutch pedal height | 166.9 mm |
The minimum allowable distance to the rivet heads at the limit wear of the friction linings of the clutch disc | 1.1 mm |
The difference in the height of the ends of the diaphragm spring | 0.5 mm |
Gap between piston and clutch slave cylinder | 0.15 mm |
Gap between piston and clutch master cylinder | 0.15 mm |
Recommended Lubricants
Elements | Lubricant |
Contact surface of the clutch release bearing and the clutch release fork support | CASMOLY L 9508 |
Inner surface of the clutch release bearing | CASMOLY L 9508 |
The inner surface of the clutch release cylinder, piston and cuffs | Brake fluid DOT 3 or DOT 4 |
Clutch disc splines | CASMOLY L 9508 |
The inner surface of the clutch master cylinder, piston and cuffs | Brake fluid DOT 3 or DOT 4 |
Clutch Master Cylinder Pusher | SAE J310a, NLGI №2 |
Clutch shaft and bushings | J310a, NLGI №1 |
Clutch release fork | CASMOLY L 9508 |
Transmission input shaft splines | CASMOLY L 9508 |
Tightening torques, Nm
Data | Meaning |
Clutch pedal bracket | 19–28 |
Clutch pedal support to master cylinder | 8–10 |
Clutch pipe union nuts | 13–17 |
Clutch pipe bracket | 4–6 |
Expansion tank bandage | 13–17 |
Clutch Release Cylinder | 15–22 |
Clutch Release Cylinder Bolt | 20–25 |
Cover with clutch pressure plate | 15–22 |
General information
The clutch is located between the engine and the gearbox and is designed to disconnect and connect the flywheel located on the engine crankshaft and the gearbox input shaft.
The clutch consists of a driven (frictional) disc, clutch cover with pressure plate and diaphragm spring, and clutch release mechanism. The friction disc consists of two annular friction linings, which are mounted on the hub through damper springs.
The diaphragm spring mechanism creates a force that combines the work of the flywheel, pressure and driven discs to ensure joint rotation, in this case the clutch is engaged and transmits torque from the engine to the gearbox. The clutch is controlled by the clutch pedal.
The clutch is released as follows. As a result of pressing the clutch pedal, the piston in the master cylinder moves, compressing the fluid, the pressure of which is transmitted through the hose to the clutch slave cylinder, the piston of which, in turn, acts on the clutch release fork. The release fork moves the release bearing, which presses on the center of the diaphragm spring, thereby releasing the engagement force around the perimeter of the spring and moves the pressure plate backwards. This releases the driven disk, after which the motor shaft and gearbox shaft can rotate independently of each other.
Friction linings are fixed on both sides of the driven disk. The leading part of the disc is connected to the hub through the parts of the torsional vibration damper, which provides an elastic connection between them. Vibration damper reduces dynamic loads that cause twisting (unwinding) transmission shafts, which occur when the vehicle speed changes sharply, hits bumps in the road, when the clutch is suddenly engaged, and also due to uneven engine torque. Elastic vibrations of transmission parts lead to the appearance of noise in mechanisms and units, as well as to vibrations, as a result of which damage to parts is possible if the amplitude of elastic vibrations reaches significant values. An absorber serves to absorb the energy of elastic torsional vibrations.