Drive shaft rubber boots — replacement (Skoda Favorit)

External CV joint

Note: This procedure is much easier to perform if the drive shaft is removed from the vehicle. However, it is possible to disassemble the outer CV joint without separating the shaft from the transmission - simply hold the inner end of the shaft in the transmission while separating the steering knuckle and then remove the outer CV joint. If this approach is used, follow the paragraphs 1-3 and 5-9 of Chapter 2.

1. Remove the drive shaft (see Chapter 2).

2. Clamp the drive shaft in a vice with soft-padded jaws. If necessary, remove the dynamic vibration damper (where is available), unscrew its two clamping screws.

3. Cut the clamps of the protective cover and bend the cover away from the CV joint (see photo).



4. Using a pointed punch, make alignment marks on the CV joint housing and shaft, then use a hammer and drift to (it should rest only on the inner CV joint assembly) knock the CV joint off the shaft grooves until the retaining ring is compressed in its groove and released (see photo).



5. Remove the CV joint from the shaft and pull off the protective boot. If the boot cannot be replaced, first wrap the threads and shaft flanges with insulating tape to protect the boot from sharp edges. Check the boot for cracks and other damage and replace it if necessary. Replace both boot clamps.



6. Remove the retaining ring from the end of the shaft and discard it. Using a clean rag, remove as much grease as possible from the CV joint.

7. When installing, wrap the necessary areas of the shaft with insulating tape to protect the boot from the shaft grooves and other sharp edges. Install the small clamp of the protective boot on the shaft, then the boot itself, so that its edge fits into the corresponding groove, and then remove the tape.

8. Place the new snap ring in the groove closest to the end of the shaft, apply a small amount of grease, and install the outer CV joint in place so that the end of the shaft, snap ring, and inner CV joint assembly align, as well as the marks you made before removing them. Protect the CV joint threads by temporarily installing the old drive shaft nut on them. Using a mallet, carefully tap the outer CV joint onto the shaft until the snap ring is compressed in the groove (see photo).



9. Make sure the locking ring has worked by now trying to pull the CV joint off the shaft.

10. Fill the CV joint with the type of grease specified in the Specifications; squeeze out any excess into the protective case.



11. Place the end of the protective boot into the groove of the CV joint housing and equalize the air pressure in the boot by carefully prying one of its sealing edges with a small screwdriver. Fasten the clamps of the protective boot.

12. If the dynamic vibration damper (where is available) was removed, install it as described in step 27 or 28 below.

13. Install the drive shaft (see Chapter 2).

Inner CV joint

Note: The following description assumes that the drive shaft will be removed and the inner CV joint will be disassembled. However, it is sufficient to remove only the outer CV joint (see note above), to remove and install the inner CV joint boot over the drive shaft. If this approach is used, remove the dynamic vibration damper (where is available), remove any rusty build-up etc. using sandpaper and wrap the sharp edges of the shaft (thread type) with insulating tape to protect the sealing edges of the cover from damage.

14. Remove the drive shaft (Chapter 2).

15. Loosen or cut the clamps of the rubber boot and bend the boot away from the CV joint (see photo).



16. Clamp the drive shaft in a vice with soft-padded jaws. If necessary, remove the dynamic vibration damper (where is available), unscrew the two Allen head tie screws that secure it to the shaft (see photo).




17. Using a pointed punch, make alignment marks on the CV joint housing and shaft, then remove the CV joint housing, being careful not to lose the needle rollers of the three joint bearings.

18. Place alignment marks on the inner CV joint assembly and shaft, then remove the snap ring from the inner end of the shaft. Remove the inner joint from the shaft grooves, again being careful not to lose the bearing needle rollers.

19. Remove the protective cover from the shaft; if it is not replaceable, wrap individual sections of the shaft with electrical tape to protect the boot from the remaining retaining ring and other sharp edges. Inspect the boot for cracks or other damage and replace it if necessary. Replace both clamps.



20. Using a clean rag, remove as much grease as possible from the CV joint.

21. When assembling, wrap certain areas of the shaft with insulating tape to protect the boot from grooves, the remaining retaining ring and other sharp edges. Install the small clamp of the protective boot and the boot itself on the shaft, make sure that its end enters the corresponding groove of the shaft, then remove the tape.

22. Aligning the marks made before removal, slide the inner CV joint half along the grooves of the shaft, then attach it by installing a new retaining ring in the groove closest to the end of the shaft. If the inner joint half needs to be driven into place with a mallet, also be careful not to lose the needle rollers of the three CV joint bearings.

23. Install the CV joint housing into the working position, aligning the marks made before removal.

24. Fill the CV joint with the rolled Specifications type of grease and place the excess in the protective cover.

25. Place the end of the boot into the groove of the CV joint housing and slide the housing along the shaft several times to distribute the grease around the joint components and adjust the boot position. Equalize the air pressure in the boot by gently lifting one of its sealing lips with a small screwdriver, then secure the boot with clamps.

26. If the dynamic vibration damper (where is available) was removed, install it as follows.

27. On models produced before 1992. (without wide mounting groove on right drive shaft), completely clean and degrease the area of the shaft surface that is 80-170 mm from the outer seat groove of the inner CV joint protective boot. Using a suitable adhesive for bonding metal to rubber/plastic, glue the two halves of the plastic insert of the vibration damper to the shaft in the place shown in Fig. 8.2. Install the metal clamps (together with their screws and washers), positioning them so that the joint of the clamps is at a right angle to the joint of the plastic insert. Tighten the screws with the tightening force specified Specifications. When the glue has dried, make sure the vibration damper is securely attached to the cotton wool. After installing the drive shaft on the car, make sure the vibration damper is at least 5 mm away from any other part of the car, especially the body and suspension (taking into account the extreme positions of the suspension components that are possible during movement).





28. On 1992 models, carefully clean the shaft and damper components and install the two halves of the plastic insert into the wide shaft groove. Install the metal clips (together with their screws and washers), positioning them so that the joint of the clamps is at a right angle to the joint of the plastic insert. Tighten the screws with the tightening force specified Specifications. No need to use glue; provided that the vibration damper is correctly seated in the groove, i.e. it cannot slide along the shaft. At the same time, the vibration damper can rotate on the shaft - this is quite acceptable.

29. Install the drive shaft (see Chapter 2).