Chapter 7 Clutch Problems, Troubleshooting, and Service 147
Figure 7-30. Study the types of pressure plate assembly damage. (Luk)
A—Chatter marks on pressure plate—Oil or grease contamination,
binding linkage, loose or soft motor mounts, worn driveline parts.
B—Broken pressure plate retracting spring—Normal fatigue,
wrong clutch for vehicle, low-quality pressure plate.
C—Pressure plate hot spots or heat checks—Clutch slippage,
oil or grease contamination, clutch adjustment too tight, binding
linkage, driving habits.
D—Broken release levers—No free play in clutch adjustment,
bad release bearing, improper part alignment.
E—Scored pressure plate—Clutch disc worn to rivets, adjust-
ment too tight, clutch slippage, binding linkage.
F—Broken diaphragm spring—Installation error, excessive
pedal reserve causing throwout bearing to travel too far during
disengagement.