6.1.4. Removal and installation of coupling

The main malfunctions for which elimination removal and dismantling of coupling are necessary:
– raised (in comparison with habitual) noise at coupling inclusion;
– breakthroughs during the coupling work;
– incomplete inclusion of coupling (coupling "slips");
– incomplete switching off of coupling (coupling "conducts").

Good advice
At failure of coupling we recommend to replace at the same time all its elements (conducted and conducting disks, and also the coupling switching off bearing) as work on coupling replacement labor-consuming, and at the intact elements of coupling the resource is already lowered and if to establish them again, repeated replacement of coupling after rather small run can be required.

It will be required to you: a key "on 10" (the face head is more convenient), an assembly shovel …
… a mandrel for centering of the conducted disk (it is possible to make of a main shaft of the transmission, having removed gear wheels).
It is possible to use the mandrel which is available on sale for front-wheel cars VAZ.
1. Remove the transmission (see. "Removal and installation of the transmission").
2. If you establish former press a disk, mark in any way (for example, paint) a relative positioning of a casing of a disk and a flywheel to establish press a disk in former situation (for balancing preservation).
3. Holding a flywheel an assembly shovel (or the big screw-driver) from a provorachivaniye, turn out six bolts of fastening of a casing of a press clutch plate to a flywheel. Weaken an inhaling of bolts evenly: each bolt on two turns of a key, passing from a bolt to a bolt on diameter.

Bolts of fastening of a casing of coupling are so located to an engine flywheel.

4. Remove press and conducted clutch plates with a flywheel, holding the conducted disk.
5. Examine the conducted clutch plate. Cracks on details of the conducted disk are not allowed.
6. Check degree of wear of frictional slips. If heads of rivets are drowned less than on 0,2 mm, the surface of frictional slips is greasy or rivet connections are weakened, then the conducted disk needs to be replaced.

If overlays of the conducted disk are greasy, check a condition of an epiploon of a main shaft of the transmission. Perhaps, its replacement is required.

7. Check reliability of fixing in nests of a nave of the conducted disk of damping springs, trying to move them in nave nests with a hand. If springs easily move in nests or are broken, replace a disk.
8. Check a beating of the conducted disk if at visual survey its buckling is revealed. If the beating exceeds 0,5 mm, replace a disk.
9. Examine the working surfaces of friction of a flywheel and a press disk, having paid attention to absence deep рисок, zadir, забоин, obvious wear tracks and an overheat. Replace defective knots.
10. When weakening rivet connections of details of a casing and press disk replace press a disk assembled.
11. External survey estimate a condition of a diaphragm spring of a press disk. Existence of cracks on a diaphragm spring is not allowed. Places of contact of petals of a spring with the bearing of switching off of coupling have to be in one plane and not have obvious wear tracks (wear should not exceed 0,8 mm). Otherwise replace press a disk assembled.
12. Examine connecting links of a casing and a disk. If links are deformed or broken, replace press a disk assembled.
13. External survey estimate a condition of basic rings of a press spring with external and inside of a spring. Rings should not have cracks and wear tracks. Otherwise replace press a disk assembled.
14. Before installation of coupling check ease of movement of the conducted disk on vents of a main shaft of the transmission. If necessary remove the causes of jamming or replace defective parts.
15. Apply refractory jellied lubricant on vents of a nave of the conducted disk.
16. At coupling installation at first establish by means of a mandrel the conducted disk, and then on three aligning pins a casing of a press disk and screw bolts of fastening of a casing to a flywheel.

Pay attention that at installation of the conducted disk the acting part of a nave has to be sent to a casing of a press disk towards a press spring.

17. Roll bolts evenly, on one turn of a key everyone, serially passing from a bolt to a bolt on diameter. The moment of an inhaling of bolts is specified in the appendix 1.
18. Remove a mandrel and install the transmission.
19. Check coupling work (see. "Check of the course of a pedal of the drive of switching off of coupling").