In the plastic spacer between the clutch housing and the working cylinder, two flat grooves are made at an angle from the bottom up. When assembled, these grooves serve as guides for the measuring template. On the middle part of the pusher of the working cylinder, a groove is made, the diameter of which corresponds to the size of the groove in the measuring template, as shown in Fig. 165. If, when installing the measuring template in the groove of the spacer, the stamping on the edges of the template is recessed into the groove, this means that the groove of the template covers the groove on the pusher of the working cylinder. This indicates that the wear of the linings of the driven disk is within acceptable limits, and the disk is suitable for further use. If the stamping on the template is on the outside, this means that the groove of the template rests against the larger diameter of the pusher (see fig. 166). In this case, it is necessary to replace the driven disk after removing the clutch.
Fig. 165. Checking the wear of the clutch driven disc linings using a template.
1 - working cylinder,
2 - spacer,
3 - pusher,
4 - measuring template 115 589 072 300,
a - direction of measurement with the steering wheel on the left,
b - direction of measurement with the steering wheel positioned on the right.
Fig. 166. Wear limit of the driven disk.
Text republished from the website (MercedesMAN)