Maintenance Instruction
5.7.1 Front drive axle main drive adjustment
The 2 tapered roller bearings respectively on the front drive bevel
pinion shaft and on the right and left of differential housings are all
preload. Any wear of bearing could create axial play at the bevel
pinion and differential housing. Accordingly check them periodically
every 1600h.The bearing of bevel pinion is adjusted through
thickness of adjusting thim to torque the bevel pinion shaft to（0.7～
1.0）N·m. Then lock the nut6.
The bearing of differential housing can be adjusted
as follows: select a proper adjusting shim1, tighten
the adjusting nut 2 and retainer mat3. If the rotating
torque is greater than that without differential by
（1.4～1.7）N·m, the preload amount is proper.At
this time, there will be no motion if pushing the
bevel gear along with axial line.
The testing method of backlash and meshing mark is
the same as that of rear axle main drive.
5.7.2 Front drive axle side drive adjustment
Stage I intermediate drive meshing mark and backlash of between driving
gear and driven gear can be adjusted by adjusting shim1; StageII final
drive meshing mark and backlash of between the driving gear and driven
gear can be adjusted by adjusting shim5.The backlash at both locations is
required as （0.25～0.45）mm.
Fig.5-14Front drive axle side drive adjustment
1. Adjusting shim 2.Intermediate drive driving gear 3.Intermediate
drive driven gear 4.Final deceleration driven gear 5.Adjusting shim
Fig.5-13 Differential housing bearing adjustment
1. Adusting shim 2. Adjusting nut 3. Retainer mat
Fig.5-14Front drive axle main drive adjustment
1.Driving bevel pinion shaft 2.Bearing block, driving bevel pinion 3.
O-ring 4. Bearing
5.Adjusting shim 6. Nut 7.Oil sealing 8. O-ring 9. Bearing
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