What Causes a Heavy Clutch After Replacing the Clutch Master Cylinder?

[DeHadley]

Clutch may become heavy due to faults in the clutch pressure plate, clutch disc, or release bearing. Below is an analysis of the reasons for a heavy clutch: 1. Damaged cable: A damaged clutch cable increases frictional resistance, making the clutch pedal heavier. In such cases, it is recommended to replace the cable directly rather than lubricating it. 2. Worn clutch disc: The clutch disc is sandwiched between the pressure plate and flywheel, with the clamping force provided by the diaphragm spring of the pressure plate. 3. Grease on the release bearing seat: There is minimal friction between the release bearing and its seat, so additional lubrication is unnecessary. Moreover, the gap between the release bearing and its seat is relatively small, and grease, being sticky, can actually increase resistance. Especially when the clutch disc is in operation, it generates a lot of dust, which can stick to the grease, making it even stickier and harder, resulting in a heavier clutch.