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2. Remove one bushing, then pull the spanner bushing
and roller bearing out of the wheel hub (Figure 59).
3. Remove the other bushing from the wheel hub
and clean any grease and dirt from the wheel hub
(Figure 59).
4. Inspect the roller bearing, bushings, spanner bushing
and inside of the wheel hub for wear. Replace any
defective or worn parts (Figure 59).
5. To assemble, place one bushing into the wheel hub.
Grease the roller bearing and spanner bushing and
slide them into the wheel hub. Place the second
bushing into the wheel hub (Figure 59).
6. Install the caster wheel into the caster fork and
secure with the wheel bolt and locknut. Tighten the
locknut until the spanner bushing bottoms against
the inside of the caster forks (Figure 59).
7. Grease the fitting on the caster wheel.
Adjusting the Electric Clutch
Service Interval: Every 500 hours—Check the electric
clutch.
The clutch is adjustable to ensure proper engagement
and proper braking.
1. Insert a 0.015–0.021 inch (0.381-0.533 mm) feeler
gauge through one inspection slot in the side of the
assembly. Make sure it is between the armature and
the rotor friction surfaces.
The gap needs to be at least .015 inches (0.381 mm)
and not more than .021 inches (0.533 mm).
2. If adjustment is needed, then set at .015 inches (0.381
mm) for each of the three adjustment slot positions.
Tighten the lock nuts until there is slight binding on
the feeler gauge but it can be moved easily within the
air gap (Figure 60).
3. Repeat this for the remaining slots.
4. Check each slot again and make slight adjustments
until the feeler gauge between the rotor and armature
with very slight contact between them.
1. Adjusting nut
2. Slot
43
Figure 60
3. Feeler gauge
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