The clutch plate of manual transmission belongs to consumables. With the use of cars, the clutch plate will wear a little bit. When the wear reaches a certain degree, it needs to be replaced. How can we know that the clutch plate should be changed? According to the past experience, I think the following situations mostly indicate that the clutch plate should be changed.
1. The clutch pedal is heavy, and the separation feeling is not obvious
If you find that the clutch pedal is heavier than before, and you can confirm that there is no problem with the transmission from the clutch pedal to the clutch, it is likely that the clutch plate is thinner.
Because the clutch plate is sandwiched between the flywheel and the pressure plate, when the clutch plate is very thick, the friction plate of the pressure plate is supported by the clutch plate, and the grinding plate spring at the other end will be tightened toward the inside. At this time, it is very easy to drive the grinding plate spring by stepping on the clutch. Moreover, the pedal is light and heavy, and there is a little resistance at the moment of separation, while the pedal is particularly light before separation and after separation.
When the clutch plate becomes thinner, the friction plate of the pressure plate will move inward, causing the grinding plate spring to tilt outward. In this way, when stepping on the clutch, the diaphragm spring needs to be pushed to move more distance, and the force of the diaphragm spring is not enough to lift the pressure plate at the initial displacement. Only when the grinding plate spring is pressed to a certain extent can the pressure plate be separated. So at this time, the clutch pedal will become very heavy, and the feeling of separation moment is very fuzzy, almost imperceptible.
If this phenomenon occurs, after eliminating other reasons, it can basically be judged that the clutch plate is thinner, but it doesn’t have to be replaced at this time, because it’s just thinner, and it doesn’t affect the normal work. Unless you feel that the pedal is too heavy and don’t want to step on it, you can consider replacing it, otherwise it won’t be a problem for another period of time.
2. The clutch disengages with a slight step
That is, the clutch joint point is higher. Because the clutch plate is sandwiched between the flywheel and the pressure plate, the spring force of the pressure plate grinding plate pushes the pressure plate friction plate to press the clutch plate tightly on the flywheel. The thicker the clutch plate is, the greater the deformation of the pressure plate grinding plate spring is, and the greater the clamping force is. The thinner the clutch plate is, the smaller the deformation of the grinding plate spring is and the smaller the clamping force is. So when the clutch plate is thin to a certain extent, the clamping force of the pressure plate on it has been stretched. If you press the clutch pedal a little, the clutch will separate.
So when you find that the clutch pedal is almost loose to the end when you start, the car will not move, or the clutch will separate when you step on the clutch pedal a little bit, which is mostly due to excessive wear of the clutch plate. At this time, the clutch plate should be replaced as soon as possible, because at this time, the clutch plate is already very thin. If it continues to be ground, the fixed rivets of the clutch plate will be ground out and the pressure plate will be damaged.
3. Clutch slipping
I don’t need to introduce this. The clutch plate is too thin. The pressure plate and flywheel can’t transmit power to it normally. Don’t hesitate at this time, change it as soon as possible. Because it will not only damage your pressure plate, but also seriously threaten the driving safety. Imagine you are ready to overtake on the road, a foot of heavy oil stepped down, the clutch skidded, the engine speed whistling up, and the speedometer did not move, that’s terrible.
The initial performance of clutch slip is not obvious, and it can hardly be felt when driving in low gear. It can only be felt when driving in high gear and stepping on the accelerator. Because the clutch does not need to transfer too much torque when driving in low gear, and the clutch load is greater when driving in high gear, so it is easier to slip.
Post time: Jan-18-2021