Valeo Concentric Slave Cylinders (CSC) - Transmission Systems for Passenger car

Concentric Slave Cylinders (CSC)

Why hydraulics?

These days, it’s difficult to fit a cable in a straight line between the pedal and lever. That’s why new cars are now using hydraulic systems – they’re much more flexible and reliable compared to manual systems. The material used is also lighter and more compact, making it easier to implement on Original Equipment (O.E.) projects. As a result, Valeo has developed a wide range of hydraulic parts: clutch master cylinder (CMC), clutch release cylinder (CRC) and clutch slave cylinder (CSC). CMC and CRC are used in semi-hydraulic systems, while a full hydraulic system uses CMC and CSC.
 

What is a clutch slave cylinder?

The CSC is a hydraulic cylinder with an integrated release bearing which replaces the clutch lever and the conventional release bearing. It is connected to the master cylinder via the hose. The CSC is in direct contact with the clutch cover diaphragm, increasing the efficiency of the hydraulic system.
 

The CSC advantage

A CSC replaces the fork and release bearing, reducing the pedal load. The CSC is concentric to the gear box input shaft, which also reduces the number of components, making vehicle assembly easier. As the release bearing, the fork and the guiding tube are no longer needed, the complete hydraulic function is up to 70% lighter than a standard clutch system.
 

Valeo Tip

The CSC should be changed when replacing a car’s clutch. Note that replacing the CSC does take longer than in semi-hydraulic systems.

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