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from side to side. If the castor spindle is loose inside the bushings,
bushings are worn and must be replaced.
1.
Raise the cutting unit so its wheels are off the floor and block
it so that it cannot fall accidentally.
2.
Remove the tensioning cap, spacer(s) and thrust washer from
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 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. Also drive the other
bushing out of the tube. Clean inside the tubes to remove dirt.
5.
Apply grease to the inside and outside of the new bushings.
Using a hammer and flat plate, 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.
Install the tensioning cap on the castor spindle to retain all
parts in place.
SERVICING THE CASTOR WHEELS AND
BEARINGS (Fig. 15)
The castor wheel rotates on a high-quality roller bearing and is sup-
ported by a spanner bushing. Even after many hours of use, provid-
ed that the bearing was kept well-lubricated, bearing wear will be
minimal. However, failure to keep the bearing lubricated will cause
rapid wear. A wobbly castor wheel usually indicates a worn bear-
ing.
1.
Remove the locknut from the capscrew holding the castor
wheel assembly between the castor fork. Grasp the castor
wheel and slide the capscrew out of the fork.
2.
Pull the spanner bushing out of the wheel hub.
3.
Remove the bushing from the wheel hub and allow the bearing
to fall out. Remove the bushing from the opposite side of the
wheel hub.
4.
Check the bearing, spanner and inside of the wheel hub for
Figure 14
1.
Front castor arm tube
2.
Bushings
Figure 15
1.
Castor wheel
2.
Capscrew & locknut
3.
Bushing (2)
4.
Spanner bushing
5.
Roller bearing
17
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