Lubricate The Caster Wheel Hubs - Toro 74906 Operator's Manual

Lubricate the Caster Wheel
Hubs
Service Interval: Yearly
1. Stop the engine, wait for all moving parts to stop,
remove the key, and engage the parking brake.
1. Seal guard
2. Raise the front of the machine up and support it with
jack stands.
3. Remove the caster wheel from the caster forks.
4. Remove the seal guards from the wheel hub.
5. Remove a spacer nut from the axle assembly in the
caster wheel.
Note: Thread-locking compound has been applied to
lock the spacer nuts to the axle.
6. Remove the axle (with the other spacer nut still
assembled to it) from the wheel assembly.
7. Pry out seals and inspect bearings for wear or damage
and replace if necessary.
8. Pack the bearings with a general-purpose grease.
9. Insert 1 bearing and 1 new seal into the wheel.
Note: Replace the seals.
10. If both spacer nuts have been removed (or broken
loose) from the axle assembly, apply a thread-locking
compound to 1 spacer nut and thread it onto the axle
with the wrench flats facing outward.
Note: Do not thread the spacer nut all of the way
onto the end of the axle. Leave approximately 3 mm
(1/8 inch) from the outer surface of the spacer nut to
the end of the axle inside the nut.
11. Insert the assembled nut and axle into the wheel on the
side with the new seal and bearing.
12. With the open end of the wheel facing up, fill the area
inside the wheel around the axle full of general-purpose
grease.
13. Insert the second bearing and new seal into the wheel.
Figure 45
2. Spacer nut with wrench
flats
14. Apply a thread-locking compound to the second spacer
nut and thread it onto the axle with the wrench flats
facing outward.
15. Torque the nut to 8 to 9 N∙m (75 to 80 in-lb), loosen
the nut, then torque it to 2 to 3 N∙m (20 to 25 in-lb).
Note: Make sure that the axle does not extend beyond
either nut.
16. Install the seal guards over the wheel hub and insert
wheel into the caster fork.
17. Install the caster bolt and tighten the nut fully.
Important: To prevent seal and bearing damage, check
the bearing adjustment often. Spin the caster tire. The
tire should not spin freely (more than 1 or 2 revolutions)
or have any side play. If the wheel spins freely, adjust the
torque on the spacer nut until there is a slight amount of
drag. Apply another layer of thread-locking compound.
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