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1. Stop the engine, set the parking brake, remove the key
and disconnect the spark plug wire(s) from the spark
plug(s).
2. Grease the fittings on the three spindle bearings until
grease comes out lower seals (Fig. 46).
3. Grease the fittings on the push arms (Fig. 46).
Figure 46
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. 47). 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 47
1. Valve stem
M–5035
1
m–1872
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. 48).
4. Check the distance from bottom of slot in nut to inside
edge of hole. Two threads or less should be showing
(Fig. 48).
5. If more than two threads are showing remove nut and
install washer between hub and nut (Fig. 48).
6. Torque the slotted nut to 125 ft-lbs (169.5 N m)
(Fig. 48).
7. Tighten nut until the next set of slots line up with the
hole in the shaft (Fig. 48).
8. Replace cotter pin.
4
2
Figure 48
1. Slotted nut
2. Two threads or less
showing
Adjusting the Caster 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 caster and tighten lock nut
(Fig. 49).
41
1
3
m–4638
3. Hole in threaded rod
4. Washer (if needed)
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