Clutch Disc: Testing and Inspection
CLUTCH DISC INSPECTION1. Inspect the contact surface of the clutch disc for scoring, cracks, burning, and oil contamination.
2. Remove minor scoring or burning using emery paper.
^ Repair if scoring or burning is major.
^ Replace if cracked or contaminated with oil.
3. Inspect for loose facing rivets and dampers.
^ If the clutch disc is loose, replace the clutch disc.
4. Using vernier calipers, measure the thickness of the lining at a rivet head on both sides.
^ If the thickness of the lining at any rivet head is less than the minimum, replace the clutch disc.
Thickness 0.3 mm (0.012 inch) min.
5. Measure the clutch disc runout using a dial indicator.
^ If the runout exceeds the maximum, replace the clutch disc.
Runout 0.7 mm (0.028 inch) max.