Engine Maintenance; Servicing The Air Cleaner - Toro 74904 Operator's Manual

14. Apply a thread-locking adhesive to the second spacer
nut, and thread it onto the axle with the wrench flats
facing outward.
15. Torque the nut to 8 to 9 N-m (75 to 80 in-lb), loosen,
then torque to 2 to 3 N-m (20 to 25 in-lb).
Note: Make sure that the axle does not extend beyond
either nut.
16. Install the seal guards over the wheel hub, and insert
wheel into the caster fork.
17. 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 adhesive.

Engine Maintenance

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 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 N
EUTRAL
brake.
2. Shut off 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
4. Clean the air-inlet screen and cover.
5. Install the air-inlet cover and secure it with the latches
(Figure 46).
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
7. Clean the inside of the air-cleaner cover with
compressed air.
8. Gently slide the primary filter out of the air-cleaner
body (Figure 47).
Note: Avoid knocking the filter into the side of the
body.
9. Remove the inner filter only if you intend to replace it.
36
-L position, and set the parking
OCK
(Figure
3
4
Figure 46
3. Air-cleaner body
4. Latch
(Figure
46).
g012996
47).