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Reposition the shims, as required, to raise or lower the
castor wheel until the cutting unit has the correct pitch.
1. Tensioning cap
2. Spacers
3. Shims
2. Install the tensioning cap.
Servicing the Castor Arm
Bushings
The castor arms have bushings pressed into the top and
bottom of the tube and after many hours of operation, the
bushings will 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
and must be replaced.
1. Raise the cutting unit so that the wheels are off of
the floor. Block the cutting unit so that it cannot
accidentally fall.
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 80). Also drive the other bushing out of the
tube. Clean the inside of the tubes to remove dirt.
Figure 79
4. Axle mounting holes
5. Castor wheel
1. Castor arm tube
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 it
is 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
Service Interval: Every 800 hours
1. Remove the locknut from the bolt holding the castor
wheel assembly between the castor fork (Figure 81)
or the castor pivot arm (Figure 82). Grasp the castor
wheel and slide the bolt out of the fork or pivot arm.
1. Castor bolt
2. Castor fork
54
Figure 80
2. Bushings
Figure 81
3. Bearing
4. Bearing spacer
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