What Causes Heavy Clutch Pedal?

[OJason]

The reasons for a heavy clutch pedal are: air leakage in the pipeline system, wear of the cylinder piston seal ring, poor sealing of the exhaust valve, too small free travel (clutch set too high), restricted movement of the release bearing seat on the sleeve (sticking), issues with the clutch pressure plate or foreign objects inside it, sticking of the hydraulic clutch master or slave cylinder, or insufficient air pressure in air-assisted clutches. The clutch is located within the flywheel housing between the engine and the transmission, secured to the rear plane of the flywheel with screws. The output shaft of the clutch is the input shaft of the transmission. While driving, the driver can press or release the clutch pedal as needed to temporarily disconnect or gradually engage the engine and transmission, thereby interrupting or transferring the engine's power to the transmission.