Toro 74312 Operator's Manual page 32

Lubricating the Caster-Wheel
Hubs
Service Interval: Yearly
1. Shut off the engine, wait for all moving parts to
stop, remove the key, and engage the parking
brake.
Figure 26
1. Seal guard
2. Remove the caster wheel from the caster forks.
3. Remove the seal guards from the wheel hub.
4. 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.
5. Remove the axle (with the other spacer nut still
assembled to it) from the wheel assembly.
6. Pry out the 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 1 bearing and 1 new seal into the wheel.
Note:
Replace the seals.
9. 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.
10. Insert the assembled nut and axle into the wheel
on the side 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.
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2. Spacer nut with wrench
flats
12. Insert the second bearing and new seal into the
wheel.
13. Apply a thread-locking compound to the second
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 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.
15. Install the seal guards over the wheel hub and
insert wheel into the caster fork.
16. 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.
Lubricating the Brake-Handle
Pivot
Service Interval: Every 160 hours
1. Shut off the engine, wait for all moving parts to
stop, remove the key, and engage the parking
brake.
2. Lubricate the bronze bushings on the
brake-handle pivot with a spray type lubricant
or light oil (Figure
Left Side of Machine Shown
1. Brake-handle pivot
2. PTO-handle pivot
32
27).
Figure 27
3. Spring-arm pivot
4. Toggle pivot
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