Adjusting the Caster-Pivot
Bearing
Service Interval:
Every 500 hours/Yearly (whichever
comes first)
1.
Disengage the blade-control switch (PTO) and
move the motion-control levers outward to the
P
ARK
position.
2.
Shut off the machine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3.
Remove the dust cap from the caster.
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.
Important:
Make sure that the spring
washers are installed correctly as shown.
5.
Install the dust cap.
g001297
Figure 49
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.
Disengage the blade-control switch (PTO) and
move the motion-control levers outward to the
P
ARK
position.
2.
Shut off the machine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3.
Remove the locknut and wheel bolt holding the
caster wheel to the caster fork.
g009453
Figure 50
1.
Locknut
4.
Roller bearing
2.
Bushing
5.
Caster wheel
3.
Spanner bushing
6.
Wheel bolt
4.
Remove 1 bushing, then pull the spanner
bushing and roller bearing out of the wheel hub.
5.
Remove the other bushing from the wheel hub
and clean any grease and dirt from the wheel
hub.
6.
Inspect the roller bearing, bushings, spanner
bushing and the inside of the wheel hub for wear.
Note:
Replace any damaged or worn parts.
7.
Place 1 bushing into the wheel hub.
8.
Grease the roller bearing and spanner bushing,
and slide them into the wheel hub.
9.
Place the second bushing into the wheel hub.
10.
Install the caster wheel into the caster fork and
secure it with the wheel bolt and locknut.
37
