38
1
2
Figure 35
1. Engine screen 2. Oil cooler
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. 36). Check the tires when they are cold to get the
most accurate pressure reading.
Pressure: 13 psi (90 kPa) drive wheels and castor wheels.
1
m–1872
Figure 36
1. Valve stem
Wheel Hub Slotted Nut
Check after every 500 operating hours.
The slotted nut needs to be torqued to 125 ft-lbs
(169.5 Nm).
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 Nm) (Fig. 37).
4. Check the distance from bottom of slot in nut to inside
edge of hole. Two threads or less should be showing
(Fig. 37).
5. If more than two threads are showing remove nut and
install washer between hub and nut (Fig. 37).
6. Torque the slotted nut to 125 ft-lbs (169.5 Nm)
(Fig. 37).
7. Tighten nut until the next set of slots line up with the
hole in the shaft (Fig. 37).
8. Replace cotter pin.
3
m-4638
1
2
4
Figure 37
1. Slotted nut
2. Two threads or less
showing
3. Hole in threaded rod
4. Washer (if needed)
Castor Pivot Bearing
Adjustment
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. 38).
3. Tighten until spring washers are flat and then back off
a 1/4 turn to properly set the pre–load on the bearings
(Fig. 38).
4. Grease castor pivot. Refer to Grease Front Castor
Pivots on 36.
Important Make sure spring washers are installed
correctly as shown in figure 38.
1
M-4640
2
3
Figure 38
1. Spring washers
2. Lock nut
3. Dust cap
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