Toro Z550 Z Master, Operator'S Manual

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Figure 45
1. Slotted Nut 3. Hole in threaded shaft
2. Two threads or less
showing 4. Washer (if needed)
5. Check the distance from bottom of slot in nut to
inside edge of hole. Two threads or less should be
showing (Figure 45).
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 45).
8. Tighten the nut until the next set of slots line up with
the hole in the shaft (Figure 45).
9. Replace the cotter pin.
Adjusting the Caster Pivot
Bearing
Service Interval: Every 500 hours
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 46).
Figure 46
1. Spring Washers 3. Dust Cap
2. Lock Nut
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 46).
Important:
Make sure spring washers are
installed correctly as shown in Figure 46.
5. Install the dust cap (Figure 46).
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