Before performing any operation on the clutch, it is necessary to carry out several checks in order to be sure that it is the clutch that is faulty.
When checking the clutch, first of all, check the fluid level in the reservoir. Check the condition of the hoses and their connections. Inspect the clutch pedal bushings for wear and tightness.
clutch housing:
1 - clutch housing;
2 - drain plug;
3 - magnet;
4 - hydraulic clutch release bearing;
5 — a bolt of fastening of the bearing of deenergizing of hydraulic coupling
- Clutch outer diameter: 216 mm.
- Clutch disc thickness: 6.9 mm.
- Number of slots: 24.
Features of the clutch hydromechanical gearbox
The clutch is controlled by the manual sequential transmission ECU. The hydraulic clutch release bearing is equipped with a position sensor. The ECU for the manual sequential transmission has a sensor that remembers the number of clutch cycles. After installing the clutch or hydraulic release bearing, perform the following operations using the diagnostic tool:
- pressurizing the system and removing air (see corresponding operation);
- resetting the clutch cycle counter (only if the clutch mechanism is replaced with a new one);
- initialization «slip points» clutch (using diagnostic equipment).
Clutch with double damped flywheel (DVA)
LUK clutch discs do not have damping elements. Gearbox noise is filtered out by the damping element of the double flywheel (DVA), and not the damping elements of the clutch disc.
Clutch (DVA):
1 - friction clutch disc;
2 - clutch mechanism;
3 - clutch release bearing.
The new concept mechanism is a gap compensation mechanism called: SAC (name proposed by LUK).
The mechanism is distinguished by the use of an automatic gap compensation system using a force sensor. The graph of the force applied to the release bearing is a curve that practically does not change with time.
This system allows for a greater wear margin than in classical clutch mechanisms.
Compensation mark:
And — a label of a wreath of compensation;
B - notches.
Attention. The SAC mechanism and the clutch friction disc are an inseparable unit (marking with the same number on component parts). In the repair version, only disk assemblies and mechanisms are supplied as a set. The clutch mechanism is in its initial position when the mark on the compensation crown is between the recesses of the mechanism.
Clutch drive:
1 - ball bearing installed in the clutch housing;
2 - clutch release fork;
3 - clutch housing;
4 - clutch release bearing;
5 - clutch mechanism;
6 - fastening bolts;
7 - hydraulic clutch slave cylinder.
Note. All clutch mechanisms are mechanisms «pressure» hydraulic type.
The clutch release actuator has a release fork mounted on a ball joint.
Clutch slave cylinder (7) secured with two bolts (6) outside of the clutch housing.