Input Shaft/Pinion Gear (4 Wheel Drive Axle) - Toro Groundsmaster 3280-D Service Manual

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)
1. Remove input shaft/pinion gear assembly from the
axle support. Remove the shims and bearing case O-
ring.
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.
4. Inspect all gears, shafts, bearings, spacers and
cases for damage and wear. Replace components as
necessary.
NOTE: Replacement input shaft/pinion gears are only
available in matched ring and pinion sets.
Installation (Fig. 78)
NOTE: When installing new bearing cones, press only
on the inner race of the bearing cone.
1. If the inner bearing cone was removed, press a new
bearing cone all the way onto the input shaft/pinion gear.
2. Place the shaft and bearing assembly in the bearing
case and install the outer bearing cone.
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.
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. Slowly tighten the lock nut until 4.0 to 6.0 in-lb (0.4 to
0.7 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.
Drive Axles
1
1. Lock nut
2. Stake washer
3. Bearing case
4. Bearing case O-ring
5. Inner bearing
6. Outer bearing
0.040 in. (1.0 mm)
2
1. Oil seal
Page 8 − 42
2
Figure 78
7. Input shaft/pinion gear
8. Bearing case shims
9. Seal collar
10. O-ring
11. Oil seal
1
Figure 79
2. Bearing case
Groundsmaster 3280−D/3320
7
5
4
8
3
6
9
10
11