Hydraulic Clutch System
The system using master and slave cylinders to disengage the clutch.
The hydraulic clutch system is the mechanism used in manual transmission vehicles to engage and disengage the clutch. It replaces older mechanical cable systems with a hydraulic system consisting of a clutch master cylinder (connected to the clutch pedal), a hydraulic line, and a clutch slave cylinder (connected to the clutch release fork).
When the driver presses the clutch pedal, the master cylinder forces brake fluid through the line to the slave cylinder, extending its plunger to push the release fork. This releases the pressure plate's clamp on the clutch disc, disconnecting the engine from the transmission and allowing the driver to change gears smoothly.
If the system develops a leak or air enters the lines, the clutch pedal will feel soft or sink to the floor, making it difficult or impossible to shift gears. Servicing the system involves checking the fluid reservoir, replacing leaking master or slave cylinders, and bleeding the lines to remove trapped air.