6.3.4. Replacement of spherical hinges of equal angular speeds

If during the movement of the car in turns knocks in the forward drive are heard, check hinges of equal angular speeds. If when rocking the side play is felt as a hand of a shaft of the drive or the protective cover is torn, such hinge needs to be replaced. It does not make sense to disassemble the external hinge (Birfild) practically. This laborious work, and at the torn cover the dirt which got to the hinge already put hinge details out of commission. It is impossible to replace hinge details separately therefore the most optimal solution — to replace the hinge assembled. Dismantling for replacement of lubricant of the internal hinge (Tripod) as simpler and less subject to hit of water and road dirt is as a last resort allowed. Emergence of traces of lubricant on the hinge indicates that the cover is torn.
It will be required to you: the screw-driver with a flat edge, bokoreza, small beards, the hammer.
1. Remove the drive of a forward wheel in collecting (see. "Removal and installation of drives of forward wheels").
2. Clear details and examine the drive:
– the external hinge of equal angular speeds has to turn with easy effort without breakthroughs and jammings, radial and axial side plays. At their existence replace the hinge;
– the internal hinge has to move in the angular and axial directions with easy effort, at the same time should not be felt breakthroughs, jammings and radial side plays. Otherwise replace the internal hinge;
– protective covers of external and internal hinges should not have cracks and gaps. Replace the damaged covers;
– the shaft of the drive of wheels should not be deformed. Replace the deformed shaft.
3. For replacement of the external hinge and its cover disconnect the screw-driver or have a bite bokorezam the lock of a collar of fastening of a big cover of the external hinge and remove a collar.

Note
Collars of fastening of protective covers of hinges of equal angular speeds of one-time use, at assembly replace them new. As a rule, collars are included in the package of the new hinge.

4. Shift a protective cover from the hinge case …
5. … also bring down from a shaft the hammer through small beards a hinge holder, overcoming effort of a lock ring.
6. Remove the external hinge from shliyets of a shaft.

Prevention
Dismantling of the external hinge is not allowed.

7. Remove a lock ring, having brought it the screw-driver out of a shaft pro-point.

Note
At assembly replace a lock ring new. As a rule, the ring is included in the package of the new hinge.

8. Remove a small collar of a cover of the external hinge the same as removed a big collar (see item 3).
9. Remove a protective cover.

Note
At installation of the hinge replace a protective cover new. Usually the cover is included in the package of the new hinge.

10. Before installation of the new external hinge fill his cavity with lubricant (if the hinge was not greased by the manufacturer) in number of about 100 g. And at first fill the hinge case, and then evenly distribute the remained quantity in cover corrugations.

Note
In the absence of the lubricant recommended by manufacturer it is possible to use domestic molybdenic SHRUS-4 lubricant.

11. Establish a cover of the external hinge and the hinge as it should be, the return to removal. At installation of the hinge on a shaft to a napressovyvayta the hinge blows of the hammer to a hinge shaft through a drift from soft metal until fixing of a holder of the hinge a lock ring.

Prevention
Before fixing of a cover of the hinge with a big collar delay the screw-driver edge of a cover to level air pressure in and outside of a cover.

Note
Marking and their diameter is applied on collars. Diameter of a big collar is 86,5 mm, small – 36,5 mm.

12. For dismantling and replacement of the internal hinge and its cover remove collars of fastening of a cover of the hinge to its case …
13. … and to a shaft.
14. If you disassemble the hinge for replacement of a cover and you assume to install the former hinge, mark in any way (for example, a core, a file or paint) a relative positioning of the case of the hinge and a shaft of the drive.
15. Shift a cover from the hinge case …
16. … also disconnect the case from the drive.
17. Mark the provision of a nave of the hinge concerning a shaft (see item 14).
18. Having hooked the screw-driver a lock ring of a nave of the hinge …
19. … take a ring from a shaft pro-point.
20. Remove from shliyets of a shaft a nave with rollers …
21. … also remove a protective cover from a shaft.
22. Wash out all metal details kerosene before full removal of old lubricant.
23. Examine rollers, a nave and an internal cavity of the case. Teases, dents and corrosion are not allowed. Rollers have to rotate on the bearings freely, without jammings. If malfunctions are found, replace the hinge assembled.
24. Establish a cover of the hinge on a shaft and fix it by a collar.
25. Establish a hinge nave on shaft vents, having combined the tags put when dismantling, and record it a lock ring.
26. Fill a cavity of the internal hinge with lubricant in number of about 100 g. And at first fill the hinge case, and then evenly distribute the remained quantity in cover corrugations.

Note
In the absence of the lubricant recommended by manufacturer it is possible to use domestic molybdenic SHRUS-4 lubricant.

27. Install the hinge case, having combined the tags put when dismantling.
28. Put on a cover the hinge case and fix it by a collar.

Prevention
Before fixing of a cover of the hinge with a big collar delay the screw-driver edge of a cover to level air pressure in and outside of a cover.

Note
Marking and their diameter is applied on collars. Diameter of a big collar is 80,5 mm, small – 41,7 mm.