6.3.1. Features of a design

Fig. 6.7. Drives of forward wheels: and – the drive of the right forward wheel; – the drive of the left forward wheel; 1 – internal hinges of equal angular speeds; 2 – big collars of fastening of covers of hinges; 3 – covers of hinges; 4 – small collars of fastening of covers of hinges; 5 – shaft of drives; 6 – external hinges of equal angular speeds

Drives of forward wheels consist of internal 1 (fig. 6.7) and the external 6 hinges of equal angular speeds (HEAS), connected by shaft 5. The external hinge provides a possibility only of angular movements of the connected shaft. The internal hinge in addition to angular provides axial shifts of shaft at turn of forward wheels and work of a suspension bracket.
The external Birfild hinge consists of the case, a separator, a holder and six balls. In the case of the hinge and in a holder flutes for placement of balls are executed. Flutes in the longitudinal plane are executed on radius that provides the required angle of rotation of the external hinge. The Shlitsevy tip of the case of the external hinge is established in a nave of a forward wheel and attached to it by a nut.
The holder of the external hinge is established on vents of a shaft 5 and recorded on a shaft by a lock ring.
The internal GKN hinge differs from external in the fact that paths of the case of a holder are executed direct, but not radial that allows details of the hinge to move in the longitudinal direction. The case of the internal hinge is attached to a transmission half shaft flange by six bolts.
The holder of the internal hinge is established on vents of a shaft 5 and recorded on a shaft by a lock ring.
Balls of one sorting group are installed in external and internal hinges. All details of hinges are selectively picked up to each other therefore it is impossible to repair hinges replacement of separate details and in spare parts deliver only the hinge assembled, and also small ремкомплект, including lock ring, a cover, collars of fastening of a cover and in certain cases lubricant.
Special lubricant with a molybdenum disulfide is applied to lubricant of hinges (a domestic analog — SHRUS-4). Cavities of all hinges are protected from hit of road dirt and water by the rubber corrugated covers 3 fixed on cases of hinges and on shaft of drives respectively big 2 and small 4 collars.
Shaft of drives have the different length and a design (the shaft of the right drive is made of a thick-walled pipe, and left — of a bar) therefore drives of the right and left wheels are not interchanged.

Good advice
Hinges of drives are very durable, their settlement resource is almost equal to a car resource. However in operation they are changed or repaired quite often because of damage of protective covers. Such work rather expensive and labor-consuming. Seriously to save, regularly check a condition of protective covers of hinges and immediately replace them at the slightest damages. If water or dust gets to the hinge through the damaged cover, it will fail through several hundreds of kilometers of a run. The tight hinge wears out extremely slowly.