Checking The Tire Pressure; Checking The Wheel Hub Slotted Nut; Caster Pivot Bearing Adjustment - Toro 74243 Operator's Manual

Checking the Tire Pressure

Maintain the air pressure in the front and rear tires as
specified. Uneven tire pressure can cause uneven cut.
Check the pressure at the valve stem after every
50 operating hours or monthly, whichever occurs first
(Fig. 51). Check the tires when they are cold to get the
most accurate pressure reading.
Pressure: 13 psi (90 kPa) drive wheels and caster wheels.
Figure 51
1. Valve stem
Checking the Wheel Hub
Slotted Nut
Check after every 500 operating hours.
The slotted nut needs to be torqued to 125 ft–lb
(170 NS 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 NS m)
(Fig. 52).
5. Check the distance from bottom of slot in nut to inside
edge of hole. Two threads or less should be showing
(Fig. 52).
6. If more than two threads are showing remove nut and
install washer between hub and nut (Fig. 52).
7. Torque the slotted nut to 125 ft–lb (170 NS m)
(Fig. 52).
8. Tighten nut until the next set of slots line up with the
hole in the shaft (Fig. 52).
9. Replace cotter pin.
1
m–1872
38
4
2
Figure 52
1. Slotted nut
2. Two threads or less
showing
Caster Pivot Bearing
Adjustment
Check after every 500 operating hours or at storage, which
ever 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 dust cap from caster and tighten lock nut
(Fig. 53).
4. Tighten until spring washers are flat and then back off
a 1/4 turn to properly set the pre–load on the bearings
(Fig. 53).
Important Make sure spring washers are installed
correctly as shown in figure 53.
Figure 53
1. Spring Washers
2. Lock nut
1
3
m–4638
3. Hole in threaded rod
4. Washer (if needed)
3
2
1
M–4640
3. Dust Cap