Checking The Tire Pressure; Checking The Wheel Lug Nuts; Checking The Wheel-Hub Slotted Nut; Adjusting The Caster-Pivot Bearing - Toro Z Master Professional 500 Series Operator's Manual

Checking the Tire Pressure

Service Interval: Every 50 hours/Monthly (whichever
comes first)
Maintain the air pressure in the rear tires at 90 kPa
(13 psi). 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 63
Checking the Wheel Lug
Nuts
Check and torque the wheel lug nuts to 122 to 129
N∙m (90 to 95 ft-lb).
Checking the Wheel-Hub
Slotted Nut
Service Interval: After the first 100 hours
Every 500 hours
Check and ensure that the torque of the slotted nut is
286 to 352 N∙m (211 to 260 ft-lb).
Note:
Do not use anti-seize compound on wheel hub.
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1. Slotted nut
Adjusting the Caster-Pivot
Bearing
Service Interval: Every 500 hours/Yearly (whichever
1. Park the machine on a level surface, disengage
the blade-control switch (PTO), and engage the
parking brake.
2. Shut off 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
the locknut
4. Tighten the locknut until the spring washers are
flat, and then back off a 1/4 turn to properly set
the preload on the bearings
Important:
washers are installed correctly as shown in
Figure 65.
5. Install the dust cap
46
Figure 64
comes first)
(Figure 65).
(Figure
Make sure that the spring
(Figure 65).
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65).