Checking The Tire Pressure; Checking The Wheel Hub Slotted Nut - Toro Z580-D Z Master Operator's Manual

Figure 56
1. Tracking knob
2. Hydraulic tank
3. Hydraulic pumps

Checking the Tire Pressure

Service Interval: Every 50 hours or monthly, whichever
occurs first.
Check the pressure at the valve stem (Figure 57).
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 57
4. Turn this way to track right
5. Turn this way to track left
Checking the Wheel Hub
Slotted Nut
Service Interval: After the first 100 hours—Check the
wheel hub slotted nut.
Every 500 hours—Check the wheel
hub slotted nut.
After the first 100 hours—Check the
wheel lug nuts.
Every 500 hours—Check the wheel
lug nuts.
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 58).
1. Slotted Nut
2. Two threads or less
showing
5. Check the distance from bottom of slot in nut to
inside edge of hole. Two threads or less should be
showing (Figure 58).
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 58).
8. Tighten the nut until the next set of slots line up with
the hole in the shaft (Figure 58).
9. Replace the cotter pin.
44
Figure 58
3. Hole in threaded shaft
4. Washer (if needed)