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Checking the Tire Pressure
Service Interval: Every 50 hours or monthly, whichever
occurs first.
Check the pressure at the valve stem (Figure 54).
Maintain the air pressure in the rear tires at 13 psi (90
kPa). Uneven tire pressure can cause uneven cut. Check
the tires when they are cold to get the most accurate
pressure reading.
Note: The front tires are semi-pneumatic tires and do
not require air pressure maintenance.
Checking the Wheel Hub
Slotted Nut
Service Interval: Every 100 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)
(Figure 55).
5. Check the distance from bottom of slot in nut to
inside edge of hole. Two threads or less should be
showing (Figure 55).
6. If more than two threads are showing remove nut
and install washer between hub and nut.
7. Torque the slotted nut to 125 ft-lb. (170 N-m)
(Figure 55).
Figure 54
8. Tighten the nut until the next set of slots line up with
the hole in the shaft (Figure 55).
9. Replace the cotter pin.
1. Slotted Nut
2. Two threads or less
showing
Adjusting the Caster Pivot
Bearing
Service Interval: Every 500 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 the dust cap from caster and tighten lock
nut (Figure 56).
4. Tighten the locknut until the spring washers are flat
and then back off a 1/4 turn to properly set the
pre-load on the bearings (Figure 56).
Important: Make sure spring washers are
installed correctly as shown in Figure 56.
5. Install the dust cap (Figure 56).
40
Figure 55
3. Hole in threaded shaft
4. Washer (if needed)
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