What are the reasons for clutch not disengaging?

[CamillaRose]

The reasons for clutch not disengaging are as follows: 1. Excessive pedal free travel: When the clutch pedal has excessive free travel, the distance the release bearing pushes the release lever forward is reduced, and the rearward movement of the pressure plate is also shortened, preventing complete clutch disengagement. 2. Improper clutch clearance: In double-disc clutches, if the distance between the adjustment screw and the intermediate drive plate is too small, it causes insufficient rearward movement of the intermediate drive plate, resulting in incomplete separation from the front friction disc. Conversely, if the distance is too large, excessive rearward movement of the intermediate drive plate may cause contact with the rear friction disc, also preventing complete disengagement. 3. Issues with front pressure plate springs: Significant differences in length and stiffness of front pressure plate springs, damaged springs, uneven spring hole depths, warping of inner/outer clutch disc assemblies, or loose rivets can cause the radial runout and axial runout of the clutch assembly to exceed specifications, putting it in intermittent contact state.