Toro GrandStand 74504, Operator'S Manual

Page: 40 / 60

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 N
EUTRAL
-
LOCK
position,
and set 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 the caster and tighten the
locknut (
Figure 53 ).
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 (
Figure 53 ).
Important:
Make sure that the spring washers are
installed correctly as shown in Figure 53 .
5. Install the dust cap ( Figure 53 ).
Figure 53
1. Spring washers 3. Dust cap
2. Locknut
Servicing the Caster Wheels
and Bearings
The caster wheels rotate on a roller bearing supported by a
spanner bushing. If the bearing is kept well lubricated, wear
will be minimal. Failure to keep the bearing well lubricated
causes rapid wear. A wobbly caster wheel usually indicates a
worn bearing.
1. Remove the locknut and wheel bolt holding the caster
wheel to the caster fork (
Figure 54 ).
Figure 54
1. Locknut 4. Spanner bushing
2. Wheel bolt 5. Roller bearing
3. Bushing
2. Remove 1 bushing, then pull the spanner bushing and
roller bearing out of the wheel hub (
Figure 54 ).
3. Remove the other bushing from the wheel hub and
clean any grease and dirt from the wheel hub (
Figure
54 ).
4. Inspect the roller bearing, bushings, spanner bushing
and the inside of the wheel hub for wear.
Note:
Replace any damaged or worn parts ( Figure 54 ).
5. Place 1 bushing into the wheel hub ( Figure 54 ).
6. Grease the roller bearing and spanner bushing, and
slide them into the wheel hub (
Figure 54 ).
7. Place the second bushing into the wheel hub ( Figure
54 ).
8. Install the caster wheel into the caster fork and secure
it with the wheel bolt and locknut (
Figure 54 ).
9. Tighten the locknut until the spanner bushing bottoms
against the inside of the caster forks (
Figure 54 ).
10. Grease the fitting on the caster wheel.
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