Initial Inspection and Diagnostic Overview
C: INSPECTION1. CLUTCH DISC
1. Facing wear
Measure the depth of rivet head from the surface of facing. Replace if facings are worn locally or worn down to less than the specified value.
Depth of rivet head: Limit of sinking 0.3 mm (0.012 inch)
CAUTION: Do not wash clutch disc with any cleaning fluid.
2. Hardened facing
Correct by using emery paper or replace.
3. Oil soakage on facing
Replace clutch disc and inspect transmission front oil seal, transmission case mating surface, engine rear oil seal and other points for oil leakage.
4. Deflection on facing
If deflection exceeds the specified value at the outer circumference of facing, repair or replace.
ST 499747100 CLUTCH DISC GUIDE
Limit for deflection: 1.0 mm (0.039 inch) at R = 107 mm (4.21 inch)
5. Worn spline, loose rivets and torsion spring failure
Replace defective parts.
2. CLUTCH COVER
NOTE: Visually check for the following items without disassembling, and replace or repair if defective.
1. Loose thrust rivet.
2. Damaged or worn bearing contact area at center of diaphragm spring.
3. Damaged or worn disc contact surface of pressure plate.
4. Loose strap plate setting bolt.
5. Worn diaphragm sliding surface.