A) Using a vernier caliper, measure the depth of the diaphragm spring wear groove.
- Maximum allowable wear in depth "A" - 0.6 mm
b) Using a ruler and feeler gauge, measure the gap between the pressure plate and the ruler as shown in the illustration.
- Maximum clearance - 0.3 mm
V) Establish the dial indicator on the block of cylinders. Rotating the flywheel, measure the runout of the diaphragm spring petals.
Note: If the measured runout is greater than the maximum, replace the flywheel.
- Max runout - 1.0 mm
2. Check up a conducted disk of coupling.
A) Check up a surface of overlays of a conducted disk on absence of traces of a strong overheat or oil pollution.
Note:
- If the disc shows signs of severe overheating or oil contamination, replace the disc.
- In the presence of small damages on a conducted disk use an emery paper.
b) Check the tightness of the rivets. If the rivets are loose, replace the driven disc.
V) Using a vernier caliper, check the thickness of the pads, on both sides of the disk, in relation to the rivet heads. If the lining thickness is less than the minimum, replace the disc.
- The minimum thickness of the lining is 0.3 mm
G) Using a dial indicator, check the axial runout of the disc. If the axial runout exceeds the specified limits, replace the disc.
- Maximum axial runout - 0.7 mm
3. Check the clutch release bearing. Applying axial pressure to the release bearing, rotate it.
Note:
- Do not wash the release bearing in any liquids. The sealed bearing does not require flushing or lubrication.
- If the bearing is seizing or there is significant resistance to rotation, replace the bearing.
4. Check up the basic bearing of a primary shaft of a transmission. Apply axial pressure to the thrust bearing and rotate it.
Note: If the bearing is seizing or there is significant rotational resistance, replace the bearing.
5. Check the flywheel.
A) Check the contact surfaces of the flywheel for scratches, cracks or signs of overheating. If necessary, repair or replace the drive.
Note: Small scratches on the flywheel or traces of overheating must be struck with sandpaper.
b) Check the flywheel crown for wear or broken teeth. If the crown teeth are damaged, replace the flywheel.
V) Using a dial gauge, check the flywheel end play. If the axial runout exceeds the specified limits, replace the flywheel.
- Maximum axial runout - 1.5 mm