Release mechanisms with self-centring thrust rings

Both complex CSCs (concentric slave cylinders) and simple release bearings are now equipped with radially moving thrust rings and guided by a sleeve on the gearbox side. They are the link between the rotating diaphragm springs on the engine side and the fixed release mechanism on the gearbox side.

Today the guide sleeves of release bearings and concentric slave cylinders (CSCs) are designed to permit a specified radial displacement of the thrust ring. In operation, this enables it to remain centred on the diaphragm spring of the clutch at all times. This self-centring feature compensates for possible radial offset between engine and gearbox, makes clutch engagement smoother, and reduces wear of the diaphragm spring tips.  When the clutch is actuated for the first time after release mechanism replacement, the latter automatically centres itself on the diaphragm spring fingers.