Checking The Wheel Hub Slotted Nut; Adjusting The Caster Pivot Bearing - Toro 74444 Operator's Manual

With a 48in or 52in turbo force side discharge mower
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cut. Check the tires when they are cold to get the most
accurate pressure reading.
Checking the Wheel Hub
Slotted Nut
Service Interval: After the first 100 hours—Check the
wheel hub slotted nut.
Every 500 hours—Check the wheel
hub slotted nut.
After the first 100 hours—Check the
wheel lug nuts.
Every 500 hours—Check the wheel
lug nuts.
The slotted nut needs to be torqued to 125 ft-lb
(170 N-m).
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. Remove the cotter pin.
4. Torque the slotted nut to 125 ft-lb (170 N-m)
(Figure 47).
Figure 46
1. Slotted Nut
2. Two threads or less
showing
5. Check the distance from bottom of slot in nut to
inside edge of hole. Two threads or less should be
showing (Figure 47).
6. If more than two threads are showing remove nut
and install washer between hub and nut.
7. Torque the slotted nut to 125 ft-lb. (170 N-m)
(Figure 47).
8. Tighten the nut until the next set of slots line up with
the hole in the shaft (Figure 47).
9. Replace the cotter pin.
Adjusting the Caster Pivot
Bearing
Service Interval: Every 500 hours/Yearly (whichever
comes first)
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. Remove the dust cap from caster and tighten lock
nut (Figure 48).
4. Tighten the locknut until the spring washers are flat
and then back off a 1/4 turn to properly set the
pre-load on the bearings (Figure 48).
Important: Make sure spring washers are
installed correctly as shown in Figure 48.
5. Install the dust cap (Figure 48).
36
Figure 47
3. Hole in threaded shaft
4. Washer (if needed)

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