Adjusting the Caster-Pivot
Bearing
Service Interval : Every 500 hours/Y early (whichever
comes rst)
1. Disengage the blade-control switch (PT O), move
the motion control levers to the N EUTRAL - LOCK
position, and set the parking brake.
2. Shut of f 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 56 ).
4. T ighten the locknut until the spring washers are
at, and then back of f a 1/4 turn to properly set
the preload on the bearings ( Figure 56 ).
Important: Make sure that the spring
washers are installed correctly as shown in
Figure 56 .
5. Install the dust cap ( Figure 56 ).
g001297
Figure 56
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 57 ).
g009453
Figure 57
1. Locknut 4. Roller bearing
2. Bushing
5. Caster wheel
3. Spanner bushing
6. Wheel bolt
2. Remove 1 bushing, then pull the spanner
bushing and roller bearing out of the wheel hub
( Figure 57 ).
3. Remove the other bushing from the wheel hub
and clean any grease and dirt from the wheel
hub ( Figure 57 ).
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 57 ).
5. Place 1 bushing into the wheel hub ( Figure 57 ).
6. Grease the roller bearing and spanner bushing,
and slide them into the wheel hub ( Figure 57 ).
7. Place the second bushing into the wheel hub
( Figure 57 ).
8. Install the caster wheel into the caster fork and
secure it with the wheel bolt and locknut ( Figure
57 ).
41
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