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Servicing the Caster-Arm
Bushings
Removing the Bushings
The caster arms have bushings pressed into the
top and bottom of the tube and after many hours of
operation, the bushings develop wear. To check the
bushings, move the caster fork back and forth and
from side to side. If the caster spindle is loose inside
the bushings, replace the bushings.
1.
Raise the cutting unit so that the wheels are off
the floor and block the cutting unit so it cannot
fall.
2.
Remove the tensioning cap, spacer(s), and
thrust washer from the top of the caster spindle.
3.
Pull the caster spindle out of the mounting tube.
Note:
Keep the thrust washer and spacer(s) on
the bottom of the spindle.
4.
Insert a pin punch into the top or bottom of the
mounting tube and drive the bushing out of the
tube
(Figure
85).
Figure 85
1. Caster-arm tube
5.
Drive the other bushing out of the tube.
6.
Clean the inside of the tubes to remove dirt.
Installing the Bushings
1.
Apply grease to the inside and outside of the
new bushings.
2.
Using a hammer and flat plate, drive the
bushings into the mounting tube.
3.
Inspect the caster spindle for wear and replace
it if it is damaged.
4.
Push the caster spindle through the bushings
and mounting tube.
5.
Slide the thrust washer and spacer(s) onto the
spindle and install the tensioning cap on the
caster spindle to retain all parts in place.
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2. Bushings
Servicing the Caster
Wheels and Bearings
Service Interval: Every 800 hours
1.
Remove the locknut from the bolt holding the
caster-wheel assembly between the caster fork
(Figure
86) or the caster-pivot arm
Note:
Grasp the caster wheel and slide the bolt
out of the fork or pivot arm.
1. Caster bolt
2. Caster fork
1. Caster wheel
2. Caster-pivot arm
2.
Remove the bearing from the wheel hub and
allow the bearing spacer to fall out
and
Figure
87).
3.
Remove the bearing from the opposite side of
the wheel hub.
4.
Check the bearings, spacer, and inside of the
wheel hub for wear and replace any damaged
parts.
67
(Figure
Figure 86
3. Bearing
4. Bearing spacer
Figure 87
3. Bearing
4. Bearing spacer
(Figure 86
87).
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