Toro Z Master 74923, Operator'S Manual

Page: 43 / 68

Figure 60
Checking the Wheel Hub
Slotted Nut
Service Interval: After the first 100 hours
Every 500 hours
1. Remove the cotter pin.
2. Torque the slotted nut to 200 ft-lb (271 N-m).
3. Check the distance from the bottom of the slot in
the nut to the inside edge of the hole. Two threads
(0.1 inch) or less should be showing.
Figure 61
1. 0.1 inch max 2. No more than two threads
(0.1 inch max) should be
showing here.
4. If more than two threads (0.1 inch) are showing,
remove the nut and install a washer between the hub
and the nut.
5. Torque the slotted nut to 200 ft-lb (271 N-m).
6. Then tighten the nut until the next set of slots line
up with the cross hole in the shaft. Do not loosen
the nut to align the slot. If required, tighten to the
next set of slots.
7. Install the cotter pin. Use a new cotter pin if needed.
Note:
Do not use anti-seize on the wheel hub.
Adjusting the Caster Pivot
Bearing
Service Interval: Every 500 hours/Yearly (whichever
comes first)
1. Disengage the blade control switch (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 62).
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 62).
Important:
Make sure the spring washers are
installed correctly as shown in Figure 62.
5. Install the dust cap (Figure 62).
Figure 62
1. Spring Washers 3. Dust Cap
2. Lock Nut
Using the Clutch Shim
Some later model year units have been built with
clutches that contain a brake shim. When the clutch
brake has worn to the point where the clutch no longer
engages consistently, the shim can be removed to extend
the clutch life.
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