3.2.1. General description

Fig. 3.36. A design of the mechanical transmission in the block with the main transfer (front-wheel cars): 1 – leading shaft; 2 – the sliding coupling and a nave of the fifth transfer; 3 – gear wheel of the fifth transfer of the leading shaft; 4 – gear wheel of the fourth transfer of the leading shaft; 5 – the sliding coupling and a nave of overgears; 6 – gear wheel of the third transfer of the leading shaft; 7 – left case; 8 – backing gear wheel shaft; 9 – intermediate gear wheel of a backing; 10 – right case; 11 – intermediate shaft; 12 – side cover; 13 – gear wheel of the fifth transfer of an intermediate shaft; 14 – gear wheel of the fourth transfer of an intermediate shaft; 15 – gear wheel of the third transfer of an intermediate shaft; 16 – gear wheel of the second transfer of an intermediate shaft; 17 – the sliding coupling and a nave of low gears; 18 – gear wheel of the first transfer of an intermediate shaft; 19 – main transfer; 20 – differential box; 21 – sensor rotor

Fig. 3.37. A design of the mechanical transmission in the block with the main transfer (all-wheel drive cars): 1 – leading shaft; 2 – the sliding coupling and a nave of the fifth transfer; 3 – gear wheel of the fifth transfer of the leading shaft; 4 – gear wheel of the fourth transfer of the leading shaft; 5 – the sliding coupling and a nave of overgears; 6 – gear wheel of the third transfer of the leading shaft; 7 – left case; 8 – backing gear wheel shaft; 9 – intermediate gear wheel of a backing; 10 – right case; 11 – intermediate shaft; 12 – side cover; 13 – gear wheel of the fifth transfer of an intermediate shaft; 14 – gear wheel of the fourth transfer of an intermediate shaft; 15 – gear wheel of the third transfer of an intermediate shaft; 16 – gear wheel of the second transfer of an intermediate shaft; 17 – the sliding coupling and a nave of low gears; 18 – gear wheel of the first transfer of an intermediate shaft; 19 – main transfer; 20 – forward differential; 21 – the transfer case conducted a gear wheel; 22 – leading gear wheel of the transfer case; 23 – the conducted shaft of the transfer case; 24 – case of the transfer case; 25 – flange of the transfer case

The transmission in the block with the main transfer has five transfers of the forward course and one transfer of a backing, three synchronizers and three shaft – leading, intermediate and a shaft of a gear wheel of a backing.

All gear wheels of transfers of the forward course are in continuous gearing, and in transfer of a backing the sliding intermediate gear wheel is in addition used.

The sliding coupling with a nave of the synchronizer of low gears is installed on an intermediate shaft and enters gearing with the gear wheels of the 1st or 2nd transfer established on intermediate to a shaft while the sliding coupling with a nave of the synchronizer of overgears is installed on the leader to a shaft and enters gearing with gear wheels of the 3rd or 4th transfers.

The sliding coupling with a nave of the synchronizer of the fifth transfer on the leader to a shaft enters gearing with a gear wheel of the fifth transfer established on the leading shaft.

To prevent noise of gear wheels at inclusion of a backing, the brake mechanism is used.

In the device the 5th synchronizer of lever type which provides braking of the leading shaft is used.

The two-conical synchronizer of a gear wheel of the 2nd transfer is used for increase in smoothness of inclusion of the 2nd transfer.

The intermediate shaft sets in motion the main transfer and differential which, in turn, put drives of forward wheels and forward wheels in action.

In all-wheel drive models the system of the constant four-wheel drive of wheels in which the viscous coupling is installed between the driveshaft No. 1 and the driveshaft No. 2 so that the torque of the engine was optimum distributed between forward and back wheels according to traffic conditions is used.

When performing maintenance it is necessary to use original sealant or its analog for consolidation of the interfaced surfaces of an aluminum case of the main transfer.

Bolts of fastening of the case have to be tightened by the nominal force of an inhaling by means of a dynamometer key.

It is also important that all details were carefully cleared by the clearing liquid and are dried up before assembly.

Further, it is necessary to adjust a preliminary tightness of conic roller bearings of an intermediate shaft.