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is loose inside the bushings, the bushings are worn;
replace them.
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
26). Also, drive the other bushing
out of the tube. Clean the inside of the tubes
to remove dirt.
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.
Remove the locknut from the bolt holding the
castor wheel assembly between the castor fork
(Figure
27). Grasp the castor wheel and slide
the bolt out of the fork or pivot arm.
2.
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.
3.
Check the bearings, spacer, and inside of the
wheel hub for wear. Replace any damaged
parts.
Figure 26
2. Bushings
(Figure
4.
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
5.
Slide the bearing spacer into the wheel hub.
Push the other bearing into the open end of the
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wheel hub to captivate the bearing spacer inside
the wheel hub.
6.
Install the castor wheel assembly between the
castor fork and secure it in place with the bolt
and locknut.
Servicing the Cutting
Blades
Blade Safety
•
Inspect the blade periodically for wear or damage.
•
Use care when checking the blades. Wrap the
blades or wear gloves, and use caution when
servicing the blades. Only replace or sharpen the
blades; never straighten or weld them.
•
On multi-bladed machines, take care as rotating 1
blade can cause other blades to rotate.
Checking for a Bent Blade
After striking a foreign object, inspect the machine
27).
for damage and make repairs before starting
and operating the equipment. Torque all of the
spindle-pulley nuts to 176 to 203 N∙m (130 to 150
ft-lb).
20
Figure 27
3. Bearings
4. Bearing spacer
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