a) Check the clutch housing (A) and diaphragm spring petals (B) for damage, bending or excessive wear.
b) Using a ruler (A) and feeler gauge (B), measure the clearance between the pressure plate (C) and the ruler as shown in the figure.
- Nominal clearance - 0.03 mm
- Maximum gap - 0.15 mm
c) Install the dial indicator (A) on the cylinder block.
d) Rotate the flywheel to measure the deflection of the tops of the diaphragm spring petals.
- Nominal deviation from plane - 0.8 mm
- Maximum deviation from plane - 1.0 mm
If one of the measured values does not correspond to the established standard, replace the clutch housing.
2. Check the clutch driven disc.
a) Check the driven clutch disc for damage, oil stains and signs of overheating.
b) Using a caliper, measure the thickness of the clutch driven disc.
- Nominal thickness - 7.25 - 7.95 mm
- Minimum allowable thickness is 5.0 mm
c) Check the thickness of the linings on both sides of the disc in relation to the rivet heads. If the lining thickness is less than the minimum, replace the disc.
- Nominal thickness - 1.1 - 1.6 mm
- Minimum allowable thickness is 0.2 mm
Replace the clutch disc if necessary.
3. Check the flywheel.
a) Make sure that the flywheel ring gear is not damaged.
b) Check the flywheel surface adjacent to the driven clutch disc for uneven wear, deep grooves and scoring.
c) Using a dial indicator (B), check the axial runout of the flywheel (A). If the axial runout exceeds the established norms, replace the flywheel.
- Nominal runout - 0.05 mm
- Maximum allowable runout is 0.15
Replace the flywheel if necessary.
4. Apply axial pressure to the transmission input shaft support bearing and rotate it. If the bearing is seized or there is significant resistance to rotation, replace the bearing.
5. Apply axial pressure to the release bearing and rotate it. If the bearing is seized or there is significant resistance to rotation, replace the bearing.
Note: Do not flush the release bearing in any liquid. The sealed bearing does not require flushing or lubrication.
