Clutch disassembled: 1 – pressure plate; 2 – clutch housing; 3 – diaphragm spring; 4 – driven disk
1. Remove the gearbox from the vehicle (see "Removal and installation the gearbox").
2. Install the mandrel into the hole in the driven disk hub 4
Note: You can remove the clutch without a mandrel, but hold the driven disk - it may fall out of the clutch housing.
Helpful Hint: A drift for centering the driven disk can be made to the dimensions of the primary shaft, or you can use the old primary shaft instead.
3. Remove the six bolts securing the clutch housing. Remove the clutch housing assembly with the pressure plate and the driven disk installed inside the housing. Hold the driven disk so that it does not fall out.
The original is available on the online resource: vazbook.ru
Note.
When unscrewing the clutch housing mounting bolts, lock the flywheel with a screwdriver. To support the screwdriver, install one clutch housing mounting bolt (for clarity, the operation is shown on a removed engine).
4. Cracks on the driven disk parts are not allowed. Check the wear of the friction linings 1.
If the heads of rivets 2 are recessed by less than 0.2 mm, the surface of the friction linings is oily or the riveted joints are loose, the driven disk must be replaced.
Check the reliability of the fixation of the damper springs 3 in the sockets of the driven disk hub; if the springs are broken, the disk must be replaced.
5. Check the runout of the driven disk if its warping is detected during visual inspection. If the runout exceeds 0.5 mm, replace the disk.
6. Inspect the working friction surfaces of the flywheel and pressure plate, paying attention to the absence of deep scratches, nicks, nicks, obvious signs of wear and overheating. Replace defective units.
7. If the riveted joints 1 of the casing and pressure plate parts are loose, replace the casing with the pressure plate assembly. Assess the condition of the diaphragm spring 2 of the pressure plate by visual inspection. The presence of cracks on the diaphragm spring is not allowed. The contact points of the spring petals with the clutch release bearing must be in the same plane and have no obvious signs of wear (wear should not exceed 0.8 mm). Otherwise, replace the housing with the pressure plate assembly.
8. Assess the condition of the pressure spring support rings by visual inspection. The rings should not have cracks or signs of wear. Otherwise, replace the housing with the pressure plate as an assembly.
Checking the condition of the clutch drive disc: A, C – controlled dimensions; B – distance between intermediate ring 4 and flywheel; 1 – pressure spring; 2 – casing; 3 – pressure plate; 4 – intermediate ring
To check the leading part of the clutch, secure the pressure plate 3 (Fig. 5.5) together with the pressure spring 1 and the casing 2 to the device with an intermediate ring 4 of thickness B=(8.3±0.04) mm. This device replaces the flywheel with the driven disk.
Disengage the clutch three times with a disengagement stroke of 8–9 mm, applying a load to the petals of the pressure spring 1 at a diameter of C=34 mm. Do the following:
- check that the disengagement stroke (8.0±0.1) mm corresponds to a pressure plate stroke of at least 1.4 mm;
- the difference in the values of the pressure plate 3 offset is no more than 0.25 mm;
- size A should be within 29-31 mm;
- the load on the petals of the pressure spring 1 at diameter C with a stroke of (8.0±0.1) mm should be no more than 1100 N, the peak load of the switch-off should be no more than 1300 N.
9. Before installing the clutch, check the ease of movement of the driven disk along the splines of the primary shaft of the gearbox. If necessary, eliminate the causes of jamming or replace defective parts.
10. Please note that when installing the driven disc into the pressure plate housing, the more protruding part of the hub should be directed towards the pressure spring.
11. Insert the centering mandrel into the splines of the driven disk from the pressure spring side.
12. Install the clutch on the flywheel using the three centering pins (shown by arrows) and screw in the six bolts securing the clutch to the flywheel evenly crosswise, holding the flywheel from turning. After this, remove the centering mandrel and install the gearbox.
