Toro Z597-D Z Master, Operator'S Manual

Page: 43 / 68

Checking the Tire Pressure
Check the pressure at the valve stem after every
50 operating hours or monthly, whichever occurs
first (Figure 53).
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.
Figure 53
Checking the Wheel Hub
Slotted Nut
Check after every 500 operating 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 54).
5. Check the distance from bottom of slot in nut
to inside edge of hole. Two threads or less
should be showing (Figure 54).
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 54).
8. Tighten the nut until the next set of slots line
up with the hole in the shaft (Figure 54).
9. Replace the cotter pin.
Figure 54
1. Slotted Nut 3. Hole in threaded shaft
2. Two threads or less
showing
4. Washer (if needed)
Adjusting the Caster Pivot
Bearing
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 the dust cap from caster and tighten
lock nut (Figure 55).
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 55).
Important:
Make sure spring washers
are installed correctly as shown in
Figure 55.
5. Install the dust cap (Figure 55).
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