Engine Maintenance; Servicing The Standard Air Cleaner - Toro 74901 Operator's Manual

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 onto the axle
with the wrench flats facing outward. Do Not thread
spacer nut all of the way onto the end of the axle.
Leave approximately 1/8 inch (3 mm) 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 new seal into the
wheel.
12. Apply a thread locking adhesive to the 2nd spacer
nut and thread onto the axle with the wrench flats
facing outward.
13. Torque the nut to 75-80 in-lb (8-9 N-m), loosen,
then re-torque to 20-25 in-lb (2-3 N-m). Make sure
axle does not extend beyond either nut.
14. Reinstall the seal guards over the wheel hub and
insert wheel into caster fork. Reinstall caster bolt
and tighten 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 torque on spacer nut until there
is a slight amount of drag. Reapply thread locking
adhesive.

Engine Maintenance

WARNING
Contact with hot surfaces may cause personal
injury.
Keep hands, feet, face, clothing and other body
parts away the muffler and other hot surfaces.
Servicing the Standard Air
Cleaner
Service Interval: Every 25 hours—Clean the foam
precleaner filter (standard air cleaner).
Every 100 hours—Replace the air
filter element (standard air cleaner).
Note: Service the air cleaner more frequently if
operating conditions are extremely dusty or sandy.
Removing the Filters
1. Disengage the PTO, move the motion control levers
to the neutral locked position and set the parking
brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Loosen the cover retaining knob and remove the
cover (Figure 44).
4. Clean the area around the air filter.
5. Remove the foam precleaner filter from the air
cleaner.
6. Remove the air filter cover nut and the cover
(Figure 44).
7. Remove the air filter and replace it.
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