Many drivers often half-clutch the clutch when turning or decelerating, and some rear gears are still placed on the clutch pedal; some vehicles have adjusted the free stroke too much so that the clutch is not completely disengaged and is in a semi-engaged and semi-disconnected state. A large amount of heat is transferred to the separation bearing due to dry friction. The bearing is heated to a certain temperature, and the butter melts or dilutes and flows, which further increases the temperature of the separation bearing. When the temperature reaches a certain level, it burns out.
The clutch release bearing is lubricated with butter. There are two ways to add butter. For 360111 release bearings, the rear cover of the bearing should be opened and filled with grease during maintenance or when the transmission is removed. Then reinstall the rear cover. For the 788611K release bearing, you can remove it and put it in the molten grease, soak it, and take it out after cooling to achieve the purpose of lubrication. In practice, it is easy for the driver to ignore this, which causes the clutch release bearing to run out of oil. In the case of no lubrication or less lubrication, the wear of the release bearing is often several times to dozens of times the amount of wear after lubrication. With increased wear, the temperature will also increase significantly, which will make it more susceptible to damage.
According to the requirements, the clearance between the clutch release bearing and the release lever is generally 2.5mm. The free stroke reflected on the clutch pedal is 30-40mm. The free stroke is too small or there is no free stroke, which will cause the release lever and The release bearing is in a normally engaged state. According to the principle of fatigue failure, the longer the working time of the bearing, the more serious the damage; the more times the bearing is loaded, the more likely it is that the separated bearing will have fatigue failure. And the longer the working time, the higher the temperature of the bearing, the easier it is to burn and reduce the service life of the separated bearing.
