Mazda MX-5 1990 Workshop Manual page 331

H
H-18
CLUTCH DISC, PILOT BEARING, FL VWHEEL
9MUOHX-047
3. Measure the thickness of the lining at a rivet head on both
sides with vernier calipers.
Replace the clutch disc if less than minimum.
Minimum thickness: 0.3mm (0.012 in)
4. Measure the clutch disc runout with a dial indicator.
Replace the clutch disc if runout is excessive.
Maximum runout: 0.7mm (0.028 in)
PILOT BEARING
INSPECTION
Turn the bearing while applying force in the axial direction.
If the bearing sticks or has excessive resistance, replace it.
FLYWHEEL
INSPECTION
Note
• Minor scoring or burning should be removed with
emery paper.
1. Inspect the contact surface of the clutch disc for scoring,
cracks, or burning, repair or replace as necessary.
Note
• The beveled side of the ring gear must face the en-
gine side.
2. Inspect the ring gear teeth for wear or damage. If neces-
sary, replace the ring gear as follows:
(1) Heat the ring gear with a blowtorch. Tap around the gear
to remove it from the flywheel.
(2) Heat the new ring gear to 250-300°C (480-570°F);
then fit it onto the flywheel.
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