Input Shaft/Pinion Gear (4 Wheel Drive Axle)
The following procedures assume the 4WD rear axle as-
sembly has been removed from the machine.
Removal (Fig. 78)
7
1.
Remove input shaft/pinion gear assembly from the
axle support. Remove the shims and bearing case O-
ring.
5
4
2.
Release the stake washer and remove the lock nut.
Remove and discard the stake washer.
3.
Drive the input shaft/pinion gear out from the outer
bearing cone and bearing case. Remove and discard
the oil seal and O-ring.
8
4.
Inspect all gears, shafts, bearings, spacers and
cases for damage and wear. Replace components as
necessary.
3
6
NOTE: Replacement input shaft/pinion gears are only
available in matched ring and pinion sets.
9
Installation (Fig. 78)
10
NOTE: When installing new bearing cones, press only
on the inner race of the bearing cone.
11
2
1
1.
If the inner bearing cone was removed, press a new
bearing cone all the way onto the input shaft/pinion gear.
2.
case and install the outer bearing cone.
Place the shaft and bearing assembly in the bearing
Figure 78
7.
8.
9.
10. O-ring
11. Oil seal
1.
2.
3.
4.
5.
6.
Lock nut
Stake washer
Bearing case
Bearing case O-ring
Inner bearing
Outer bearing
Input shaft/pinion gear
Bearing case shims
Seal collar
NOTE: The bearings must be completely seated.
There should be no input shaft/pinion gear end play.
3.
Coat a new oil seal with grease and install as shown
in Figure 79.
4.
Coat a new O-ring with grease. Install O-ring in the
seal collar and install the collar.
5.
Install a new stake washer. Install the lock nut finger
tight.
0.040 in. (1.0 mm)
2
1
6.
Set the bearing preload by securing the bearing case
in a vise. Thread a M12 x 1.5 hex head cap screw into
the splined end of the input shaft/pinion gear.
7.
0.7
Slowly tighten the lock nut until 4.0 to 6.0 in-lb (0.4 to
N−m) of force is required to rotate the input shaft/pin-
ion gear in the bearing case.
8.
Secure the lock nut with the stake washer.
Figure 79
2. Bearing case
1.
Oil seal
Drive Axles
Page 8 − 42
Groundsmaster 3280−D/3320
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