Toro 74310 Operator's Manual page 31

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 27
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.
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).
2. Spacer nut with wrench
flats
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
Left Side of Machine Shown
1. Brake-handle pivot
2. PTO-handle pivot
Lubricating the Brake-Rod Bushings
and Steering-Linkage Rod Ends
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. Unhook the seat latch and tilt the seat up.
3. Lubricate the bronze bushings on each end of the
brake rod shaft with a spray type lubricant or a light oil.
Note: The bushings are located to the inside of the
flange bearings.
31
(Figure
Figure 28
3. Spring-arm pivot
4. Toggle pivot
28).