Clutch Release Cylinders (CRC)
The move to hydraulics
As new car manufacturers’ requirements change, it’s become difficult to fit a cable in a straight line between the pedal and lever. That’s where hydraulics systems can help – they’re more flexible and reliable than cable systems, and the material is lighter and more compact. Hydraulic systems also enable an optimal and constant pedal effort.
Valeo: a choice of hydraulics
Valeo’s range of hydraulic parts include a clutch master cylinder (CMC), clutch release cylinder (CRC) and clutch slave cylinder (CSC). Both CMC and CRC are used in semi-hydraulic systems, while full hydraulic systems use CMC and CSC. Valeo’s range features over 55 part numbers, covering applications such as Fiat Punto, Ford Transit, Hyundai Accent and Kia Picanto.
How do hydraulic systems work?
A semi-hydraulic system consists of a transmitter (the CMC), a hose and a receiver (the CRC). The clutch pedal arm operates a piston in the CMC and this action forces hydraulic fluid through a pipe to the CRC where another piston operates the clutch disengagement mechanism. Each time the vehicle is equipped with a CRC, the interface within the hydraulic system and the clutch is done with a clutch fork and a release bearing. Contrary to the CSC (in a full hydraulic system), the CRC is very easy and quick to replace as the gearbox doesn’t need to be removed to replace the part. Replacing a CRC only takes professionals around 30 minutes.