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Servicing the Bushings in
the Castor Arms
The castor arms have bushings pressed into the top
and bottom of the tube, and after many hours of
operation, the bushings wear.
To check the bushings, move the castor fork back
and forth and from side to side. If the castor spindle
is loose inside the bushings, the bushings are worn;
replace them.
1.
Park the machine on a level surface, lower the
cutting unit, engage the parking brake, shut off
the engine, and remove the key.
2.
Remove the tensioning cap, spacer(s), and
thrust washer from the top of the castor spindle.
3.
Pull the castor spindle out of the mounting tube.
Allow the thrust washer and spacer(s) to remain
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
21). Also, drive the other bushing
out of the tube. Clean the inside of the tubes
to remove dirt.
Figure 21
1. Castor arm tube
5.
Apply grease to the inside and outside of the
new bushings. Use a hammer and flat plate to
drive the bushings into the mounting tube.
6.
Inspect the castor spindle for wear and replace
it if damaged.
7.
Push the castor spindle through the bushings
and mounting tube, slide the thrust washer
and spacer(s) onto the spindle, and install the
tensioning cap on the castor spindle.
Servicing the Castor
Wheels and Bearings
1.
Park the machine on a level surface, lower the
cutting unit, engage the parking brake, shut off
the engine, and remove the key.
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2. Bushings
2.
Remove the locknut from the bolt holding the
castor wheel assembly between the castor fork
(Figure
22). Grasp the castor wheel and slide
the bolt out of the fork or pivot arm.
3.
Remove the bearing from the wheel hub and
allow the bearing spacer to fall out
Remove the bearing from the opposite side of
the wheel hub.
4.
Check the bearings, spacer, and inside of the
wheel hub for wear. Replace any damaged
parts.
5.
To assemble the castor wheel, push the bearing
into the wheel hub. When installing the bearings,
press on the outer race of the bearing.
1. Castor wheel
2. Castor fork
6.
Slide the bearing spacer into the wheel hub.
Push the other bearing into the open end of the
wheel hub to captivate the bearing spacer inside
the wheel hub.
7.
Install the castor wheel assembly between the
castor fork and secure it in place with the bolt
and locknut.
18
(Figure
Figure 22
3. Bearings
4. Bearing spacer
22).
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