Toro Groundsmaster 300 Series Service Manual page 237

Adjusting Rear Wheel Bearings
1. Remove dust cap from end of wheel spindle. Also
remove cotter pin retaining slotted nut in place (Fig. 18).
2. Rotate the wheel by hand and tighten the slotted nut
1
(Fig. 19) until the bearing binds SLIGHTLY. Then,
loosen the nut until the nearest slot and hole in the
spindle line up. Reinstall the cotter pin to retain the
slotted nut in place. NOTE: The correct end play of the
adjusted assembly is .002 -. 005 inches.
3. Remove jack stands or blocks and lower machine to
floor.
4. Put a coating of grease on the inside of the dust cap.
Install dust cap on the end of the wheel spindle (Fig. 18).
Figure 19
1. Cotter pin and slotted nut
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Groundsmaster 300 Series Page 8 - 17 Repairs