Engine Maintenance; Servicing The Air Cleaner - Toro 74936 Operator's Manual

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 Air Cleaner

Service Interval: Every 150 hours—Inspect the
primary filter.
Every 300 hours/Yearly (whichever
comes first)—Replace the primary air
filter. (more often in dusty or sandy
conditions)
Every 300 hours—Check the inner
air filter.
Every 600 hours—Replace the inner
air filter.
Note: Check the filters more frequently if the 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. Release the latches on the air cleaner and pull the air
cleaner cover off the air cleaner body (Figure 49).
4. Clean the inside of the air cleaner cover with
compressed air.
5. Gently slide the primary filter out of the air cleaner
body (Figure 49).
Note: Avoid knocking the filter into the side of the
body.
6. Remove the inner filter only if you intend to replace
it.
Important: Never attempt to clean the inner
filter. If the inner filter is dirty, then the primary
filter is damaged. Replace both filters.
7. Inspect the primary filter for damage by looking into
the filter while shining a bright light on the outside
of the filter. Holes in the filter will appear as bright
spots. If the filter is damaged discard it.
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