Toro 74310 Operator's Manual page 28

Figure 28
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 1 of the spacer nuts from the axle assembly
in the caster wheel.
Note: 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 the seals, and inspect the bearings for wear or
damage and replace if necessary.
7. Pack the bearings with a general-purpose grease.
8. Insert 1 bearing and 1 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 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 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 new seal into the wheel.
13. Apply a thread locking adhesive to the second spacer
nut and thread it onto the axle with the wrench flats
facing outward.
14. Torque the nut to 8-9 N-m (75-80 in-lb), loosen, then
re-torque to 2-3 N-m (20-25 in-lb).
Note: Make sure that the axle does not extend beyond
either nut.
2. Spacer nut with wrench
flats
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.
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 thread locking adhesive.
Lubricate the Brake-handle Pivot
Service Interval: Every 160 hours
1. Stop 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 29).
Left Side of machine shown
1. Brake Handle Pivot
2. PTO Handle Pivot
Lubricate the Brake-rod Bushings
Service Interval: Every 160 hours
1. Stop the engine, wait for all moving parts to stop,
remove the key, and engage the parking brake.
2. Unhook the seat latch and tilt seat up.
3. Lubricate the bronze bushings on each end of the
brake rod shaft with a spray type lubricant or a light
oil (bushings are located to the inside of the flange
bearings).
Lubricate the Steering-linkage Rod
Ends
Service Interval: Every 160 hours
28
Figure 29
3. Spring Arm Pivot
4. Toggle Pivot