Engine Maintenance; Servicing The Air Cleaner - Toro 74978 Operator's Manual

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). 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.
16. Raise the front of the machine up and remove the jack
stands.

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
Every 300 hours/Yearly (whichever comes
first)—Replace the primary air filter. (more often in
dusty or sandy conditions)
Every 300 hours—Check the air filter.
Every 600 hours—Replace the 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
inlet cover off the air cleaner body (Figure 44).
4. Clean the air inlet screen and cover.
5. Install the air inlet cover and secure it with the latches
(Figure 44).
2
1
1. Air inlet cover
2. Air inlet screen
6. Release the latches on the air cleaner and pull the air
cleaner cover off the air cleaner body (Figure 45).
7. Clean the inside of the air cleaner cover with
compressed air.
34
3
4
Figure 44
3. Air cleaner body
4. Latch
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