Engine Maintenance; Servicing The Air Cleaner - Toro 74939 Operator's Manual

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.
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.

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 45).
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 45).
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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