5.7.1 Adjustment of Central Transmission of Front Drive Axle
The two tapered roller bearings on the small bevel gear shaft of the
front drive axle and the left and right tapered roller bearings on the
differential housing are pre-tightened. During use, the small bevel gear
shaft and the differential housing occur axial clearance due to the wear
of the bearings, so they should be checked regularly every 1600h. The
adjustment of small bevel gear shaft bearing depends on adjusting the
thickness of adjusting washer 5 so that the torque for rotating small
bevel gear shaft independently is (1.0 ~ 2.0) N·m. And then tighten nut
6.
To adjust the bearing of differential housing, select
the appropriate adjusting washer 1, tighten the
adjusting bolt 2, lock the lock washer 3, and rotate
the small bevel gear shaft. If the rotating torque is
(0.27 ~ 0.53) N·m more than that when the
differential is not installed, the pre-tightening is
appropriate. At this time, push the bevel gear axially,
and there should be no movement.
The testing method of backlash and gearing marks is
the same as that of the rear axle central transmission.
The adjustment of backlash and gearing marks between driving
gear and driven gear of Level I central transmission of front drive axle
side drive depends on adjusting the adjusting washer 1.
And the adjustment of backlash and gearing marks between driving gear
and driven gear of Level II end transmission depends on adjusting the
adjusting washer 5.
The two backlash are both required to be (0.15 ~ 0.25) mm.
Fig. 5-9 Adjustment of Central Transmission of Front Drive Axle
1. Driving bevel gear shaft 2. Bearing seat of driving bevel gear
shaft 3. O-ring 4. Bearing
5. Adjusting washer 6. Nut 7. Oil seal 8. O-ring 9. Bearing
Fig. 5-11 Adjustment of Side Transmission of Front Drive Axle
1. Adjusting washer 2. Central transmission driving gear
3. Central transmission driven gear 4. End deceleration
driven gear 5. Adjusting washer
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