Lubricating The Caster Wheel Hubs - Toro Z Master 3000 SERIES Operator's Manual

Figure 41
6. Remove the dust cap and adjust the caster pivots. Keep
the dust cap off until greasing is complete. Refer to
Adjusting the Caster Pivot Bearing in Maintenance.
7. Remove the hex plug. Thread a grease fitting into the
hole.
8. Pump grease into the fitting until it oozes out around
the top bearing.
9. Remove the grease fitting from the hole. Install the hex
plug and dust cap (Figure 42).
Figure 42
Lubricating the Caster Wheel
Hubs
Service Interval: Yearly
1. Stop the engine, wait for all moving parts to stop, and
remove the key. Engage the parking brake.
1. Seal guard
2. Raise the front of the machine up, and support it with
jack stands (or equivalent support) just high enough to
allow the front wheels to turn freely.
3. Remove the caster wheel from the caster forks.
4. Remove the seal guards from the wheel hub.
5. Remove one of the spacer nuts from the axle assembly
in the caster wheel. Note that 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.
6. Pry out seals, and inspect the bearings for wear or
damage and replace them if necessary.
7. Pack the bearings with a general-purpose grease.
8. Insert one bearing, one new seal into the wheel.
Note: The seals must be replaced.
9. 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. Do not thread the
spacer nut all 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.
10. Insert the assembled nut and axle into the wheel on the
side of the wheel with the new seal and bearing.
11. With the open end of the wheel facing up, fill the area
inside the wheel around the axle full of general-purpose
grease.
12. Insert the second bearing and a new seal into the wheel.
13. Apply a thread-locking adhesive to the 2nd spacer nut
and thread it onto the axle with the wrench flats facing
outward.
14. Torque the nut to 8 to 9 N-m (75 to 80 in-lb), loosen it,
then torque it to 2 to 3 N-m (20 to 25 in-lb). Make sure
that the axle does not extend beyond either nut.
15. Install the seal guards over the wheel hub and insert
the wheel into the caster fork. Install the caster bolt
and tighten the nut fully.
16. Remove the jack stands.
31
Figure 43
2. Spacer nut with wrench
flats