Lubricating The Caster-Wheel Hubs - Toro 74568TE Operator's Manual

Lubricating the Caster-Wheel
Hubs
Service Interval: Yearly
1. Stop the engine, wait for all moving parts to stop,
engage the parking brake, and remove the key.
1. Seal guard
2. Remove the caster wheel from the caster forks.
3. Remove the seal guards from the wheel hub.
4. Remove one of the spacer nuts from the axle assembly
in the caster wheel.
Note: Thread-locking adhesive has been applied to
lock the spacer nuts to the axle. Remove the axle (with
the other spacer nut still assembled to it) from the
wheel assembly.
5. Pry out the seals and inspect bearings for wear or
damage, and replace if necessary.
6. Pack the bearings with a general-purpose grease.
7. Insert 1 bearing and 1 seal into the wheel.
Note: The seals must be replaced.
8. If the axle assembly has had both spacer nuts removed
(or broken loose), apply a thread-locking adhesive to
one spacer nut and thread it onto the axle with the
wrench flats facing outward.
Note: Do Not thread 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.
9. Insert the assembled nut and axle into the wheel on the
side of the wheel with the new seal and bearing.
10. With the open end of the wheel facing up, fill the area
inside the wheel around the axle full of general-purpose
grease.
11. Insert the second bearing and the new seal into the
wheel.
12. Apply a thread-locking adhesive to the second spacer
nut, and thread it onto the axle with the wrench flats
facing outward.
Figure 40
2. Spacer nut with wrench
flats
13. Torque the nut to 8 to 9 N-m (71 to 80 in-lb), loosen,
then torque it to 2 to 3 N-m (20 to 25 in-lb).
Note: Make sure axle does not extend beyond either
nut.
14. Install the seal guards over the wheel hub and insert
wheel into caster fork.
15. Install caster bolt and tighten nut fully.
Important: To prevent seal and bearing damage, check
the bearing adjustment often by spinning 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, and apply thread-locking
adhesive.
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