Why Does the Car Clutch Become Heavier?
1 Answers
Possible reasons for a heavier car clutch are as follows: 1. Excessive return spring tension: To ensure the clutch pedal returns quickly and accurately to its standby position when released, a return spring is designed at the pedal. If the heavy pedal phenomenon occurs after replacing the spring, it is likely due to excessive tension in the clutch pedal return spring. 2. Damaged clutch assist cylinder: Many car clutches use an assist system, which normally makes operation easier. However, if the clutch assist cylinder malfunctions, it may result in insufficient assistance, ultimately making the clutch pedal feel very heavy when pressed. 3. Low compressed air pressure: Most of the power driving the clutch booster comes from the compressed air in the air reservoir. If the compressed air pressure leading to the booster is too low, it will cause insufficient assistance. Therefore, when such a fault occurs, the compressed air pressure to the clutch booster should be checked first. 4. Insufficient lubrication: The clutch is driven by the assist cylinder (commonly known as the slave cylinder) through a series of mechanical structures to disengage the pressure plate. There are several points within this structure that require lubrication. If lubrication is insufficient, excessive friction can cause the clutch pedal to feel heavy. 5. Overly tight release bearing: If the fit clearance between the release bearing and the guide sleeve is too small, it will cause excessive friction. The driving force is wasted on the friction between the release bearing and the guide sleeve, making the pedal inevitably heavy.
