Hydraulic Clutch Control Mechanism With Concentric Slave Cylinder (CSC)

The clutch control mechanism is fully hydraulic. The slave cylinder is inside the clutch cover. There is no mechanical transfer (fork) inside the clutch cover from an external slave cylinder.

The concentric slave cylinder (CSC) means that the slave cylinder is integrated with the throwout bearing.

The concentric slave cylinder (CSC) is extremely efficient and reliable and the throwout bearing is accurately centered.

The unit is mounted with a bolt in the gearcase. The bearings and sliding surfaces do not require lubrication. The bearing on the concentric slave cylinder is self-centering to the clutch fan.

The hydraulic line from the master cylinder is connected to the concentric slave cylinder (CSC) via an adapter. There is a bleed nipple on the adapter.

There are ratios built-in to the system to reduce the force required to transfer torque:

• pedal effort
• hydraulic force
• clutch finger force.

The force is reduced from approximately 8600 N at the clutch to approximately 100 N at the pedal.

If the clutch pedal returns too quickly, the drive line could be damaged by the high torque. There is a shock load limiter in the clutch to avoid this. The shock load limiter chokes the flow between the concentric slave cylinder (CSC) and the master cylinder if there is a danger of the excessive torque. The shock load limiter is in the concentric slave cylinder.