Clutch Disc

1. Inspect the clutch disc facings for oil or grease. Eliminate the source of any oil or grease before replacing the clutch disc (7550).

   • An excessive amount of grease on the clutch release hub and bearing (7548) will find its way to the clutch disc facings.
   • Too much lubricant in the transmission or a plugged transmission vent will force the transmission lubricant out the input shaft and onto the disc facings.
   • Leaking rear engine seals or loose or unsealed flywheel housing attaching bolts allow engine oil to flow onto the disc facings.

2. NOTE: Use emery cloth to remove minor imperfections in the clutch disc lining surface.

   Check for worn clutch disc lining. Measure the depth to the rivet heads with a slide caliper. The minimum allowable depth is 0.3mm (0.012 inch).

   
   
   
   
   

3. Inspect the clutch disc for worn or loose facings.

4. Check the clutch disc for warpage and for loose rivets at the hub.

5. Check for broken springs.

6. Check the runout of the clutch disc using Dial Indicator with Bracketry D78P-4201-F and Dial Indicator D78P-4201-G or equivalents. The maximum allowable runout is 0.700mm (0.0276 inch).

   
   
   
   
   

7. Check for wear or rust on the splines and remove with an emery cloth.

8. Replace clutch disc if any of these conditions are present. When installing a new clutch disc, do not drop or contaminate with oil or grease.