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Pressure: 13 psi (90 kPa) drive wheels and castor wheels.
Figure 49
1. Valve stem
Adjusting the Castor Pivot
Bearing
Check after every 500 operating hours or at storage which
ever comes first.
1. Stop the engine, set the parking brake, remove the key
and disconnect the spark plug wire(s) from the spark
plug(s).
2. Remove dust cap from castor and tighten lock nut
(Fig. 50).
3. Tighten until spring washers are flat and then back off
a 1/4 turn to properly set the preload on the bearings
(Fig. 50).
Important
Make sure spring washers are installed
correctly as shown in figure 50.
Figure 50
1. Spring washers
2. Lock nut
1
m–1872
3
2
1
3. Dust cap
37
Adjusting the Wheel Hub
Slotted Nut
Check after every 500 operating hours.
The slotted nut needs to be torqued to 125 ft-lbs
(169.5 N m).
1. Stop the engine, set the parking brake, remove the key
and disconnect the spark plug wire(s) from the spark
plug(s).
2. Remove cotter pin.
3. Torque slotted nut to 125 ft-lbs (169.5 N m) (Fig. 51).
4. Check the distance from bottom of slot in nut to inside
edge of hole. Two threads or less should be showing
(Fig. 51).
5. If more than two threads are showing remove nut and
install washer between hub and nut (Fig. 51).
6. Torque the slotted nut to 125 ft-lbs (169.5 N m)
(Fig. 51).
7. Tighten nut until the next set of slots line up with the
hole in the shaft (Fig. 51).
8. Replace cotter pin.
4
5
2
Figure 51
1. Slotted nut
2. Two threads or less
showing
Adjusting the Level of Mower
1. Position mower on a flat surface. Stop the engine, set
the parking brake, remove the key and disconnect the
spark plug wire(s) from the spark plug(s).
2. Check tire pressure of all four (4) tires. If needed,
adjust to 13 psi (90 kPa)
3. Set anti-scalp rollers to top holes or remove them
completely for this adjustment.
1
3
3. Hole in threaded shaft
4. Washer (if needed)
5. Slot
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