Adjusting The Caster Pivot Bearing; Checking The Wheel Hub Slotted Nut; Leveling The Mower At Three Positions - Toro 74410 Operator's Manual

5. To make the machine move to the left, turn the knob
toward the left side of the machine; refer to Figure 48.
6. Repeat the adjustment until the tracking is correct.
Adjusting the Caster Pivot
Bearing
Check after every 500 operating hours or at storage,
whichever occurs 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 the caster and tighten the
locknut (Fig. 49).
Figure 49
1. Spring washers
2. Locknut
4. Tighten the locknut until the spring washers are flat,
then back off 1/4 turn to properly set the pre-load on the
bearings (Fig. 49).
Important Ensure that the spring washers are installed
correctly as shown in Figure 49.
Checking the Wheel Hub
Slotted Nut
Check after every 500 operating hours.
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) (Fig. 50).
3
2
1
m–4640
3. Dust cap
39
4
5
2
Figure 50
1. Slotted nut
2. Two threads or less
showing
5. Check the distance from the bottom of the slot in the
nut to the inside edge of the hole.
Note: No more than 2 threads should be showing
(Fig. 50).
6. If more than 2 threads are showing, remove the nut and
install a washer between the hub and nut (Fig. 50).
7. Torque the slotted nut to 125 ft-lb (170 N⋅m) (Fig. 50).
8. Tighten the nut until the next set of slots line up with
the hole in the shaft (Fig. 50).
9. Install the cotter pin.
Leveling the Mower at Three
Positions
Important There are only 3 measuring positions
needed to level the mower.
Setting Up the Machine
1. Position mower on a flat surface.
2. Disengage the PTO, move the motion control levers to
the neutral locked position, and set the parking brake.
3. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
4. Check tire pressure of all 4 tires. If needed, adjust them
and refer to Checking the Tire Pressure on page 34.
5. Position the mower to the 3-inch (76 mm) height-of-cut
position.
6. Inspect the 4 chains; the chains need to have tension.
Note: Adjust the rear chains to the top of the slot, where
they are attached to the mower.
1
3
m–4638
3. Hole in threaded shaft
4. Washer (if needed)
5. Slot