Toro 74408 - Engine Maintenance; Servicing the Air Cleaner

Figure 26
1. 1/8 inch (3 mm) of the nut past the axle
12. Install the assembled n ut and axle into the
wheel on the side with the bearing and a new
seal ( Figure 27 ).
13. Place the wheel with the open end facing
up and fill the area inside the wheel with
m ulti-pur pose g rease .
14. Install the second bearing and a new seal into
the wheel ( Figure 27 ).
15. Apply thread loc king adhesi v e to the second
spacer n ut and install it onto the axle with the
wrenc h flats facing outw ard.
16. T or que the spacer n ut to 75-80 in-lb (8-9 N ⋅ m)
then loosen it and tor que it to 20–25 in-lb (2-3
N ⋅ m). Mak e sure the axle does not extend past
either n ut ( Figure 26 ).
17. Install the seal guards o v er the wheel hubs and
inser t the wheel into the caster fork ( Figure 25 ).
18. Install the caster bolt and tighten the n ut
( Figure 25 ).
Important: Check the bearing
adjustment often to pr ev ent seal and
bearing dama ge. Spin the caster tir e. T he
tir e should not spin fr eel y mor e than 1 to 2
r ev olutions or ha v e an y side-to-side play
betw een the caster f or k. If the wheel spins
fr eel y , adjust the torque on the spacer n ut
until ther e is a slight amount of dra g .
Figure 27
1. Spacer nut
4. Caster wheel
2. Bearing seal (new seals
required)
5. Nut and axle assembled
3. Bearing
Engine Maintenance
Servicing the Air Cleaner
Service Interval/Specication
F oam element: Clean it after ev er y 25 operating
hours .
P aper element: Chec k it after ev er y 50 operating
hours . R e place it after ev er y 200 operating hours
or yearly , whic h ev er comes first.
Inspect the foam and paper elements and re place
them if they are damag ed or ex cessi v ely dir ty .
Note: Ser vice the air cleaner more frequently
(ev er y few operating hours) if the operating
conditions are extremely dusty or sandy .
Important: Do not oil the f oam or paper
element.
Removing the Foam and Paper
Elements
1. Diseng ag e the PTO and set the parking brak e .
2. Stop the engine , remo v e the k ey , and w ait for
all mo ving par ts to stop before lea ving the
operating position.
3. Clean around the air cleaner to prev ent dir t
from g etting into the engine and causing
damag e ( Figure 28 ).
4. Unscrew the co v er knob and remo v e the air
cleaner co v er ( Figure 28 ).
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