Analysis of the reasons why the clutch pedal is strenuously stepped on: 1. The return spring has a large tension. 2. The clutch booster cylinder is damaged. 3. The compressed air pressure is low. 4. Insufficient lubrication. 5. The release bearing is too tight. The clutch pedal is one of the devices most frequently used by drivers. If the clutch pedal is heavy, it will be very tired after driving all day.
1. The clutch of the truck is separated by a booster cylinder (commonly known as the sub-cylinder) driving the pressure plate through a series of mechanical structures. There are several points that need to be lubricated in this structure. If the lubrication is insufficient and the friction is too high, the clutch pedal will be heavy.
2. The clutch can realize the clutch function by pressing and loosening the clutch plate by the pressure plate, while the pressing and loosening of the pressure plate is completed by the shift fork driving the release bearing. The release bearing sleeve slides back and forth on the cover guide sleeve of the gearbox input shaft to control the separation of the pressure plate. If the clearance between the release bearing and the guide sleeve is too small, it will cause excessive friction and the driving force is wasted in the release bearing It is inevitable that the pedal will be heavy due to friction with the guide sleeve.
3. If the pedal is heavy after replacing the new spring, it is likely to be caused by the excessive tension of the return spring of the clutch pedal. This problem is easier to solve, just replace a spring with a smaller tension. .
4. At present, almost all heavy-duty truck clutches use power-assisted systems. Under normal circumstances, the operation will be relatively light. However, if the clutch booster cylinder fails, it may cause insufficient power assistance. The final performance is very heavy when stepping on the clutch pedal.