Checking The Wheel Hub Slotted Nut; Adjusting The Caster Pivot Bearing; Servicing The Gear Box - Toro Z580-D Z Master 74266CP Operator's Manual

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. Check the distance from bottom of slot in nut to
inside edge of hole. Two threads or less should be
showing (Figure 54).
1. Slotted Nut
2. Two threads or less
showing
5. If more than two threads are showing remove nut
and install washer between hub and nut.
6. Torque the slotted nut to 125 ft-lb. (170 N-m)
(Figure 54).
7. Tighten the nut until the next set of slots line up with
the hole in the shaft (Figure 54).
8. Replace the cotter pin.
Adjusting the Caster Pivot
Bearing
Service Interval: Every 500 hours (or yearly, 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.
Figure 54
3. Hole in threaded shaft
4. Washer (if needed)
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).
1. Spring Washers
2. Lock Nut

Servicing the Gear Box

Checking the Gear Box Oil Level
Service Interval: Every 100 hours
Use SAE 75W–90 Synthetic Gear Lube.
1. Park the machine on a level surface.
2. Disengage the PTO, move the motion control levers
to the neutral locked position and set the parking
brake.
3. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
4. Remove the side or rear plug on the gear box.
(Figure 56).
5. The oil should be up to the opening of the gear box.
6. Add oil if needed to bring it to the correct level.
42
Figure 55
3. Dust Cap