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Maintenance and Service Instructions
8. Remove the tine rotor shaft bearing bolts (4).
9. Remove chain scaper bolts (2) and chain
scraper (on Model 424 only).
10. Remove the rotor shaft assembly.
11. Remove outer rotor bearing by loosening the
set screw in the collar.
Figure 17
12. Unlock collar (best accomplished by using a
hammer and pin punch). Insert pin punch
intothe hole next to the set screw and, using
the hammer, with moderate striking, hit collar
so that it rotates in the opposite direction the
rotor would normally turn.(see Figure 17)
13. Reverse these steps to reinstall.
14. Refer to sections "Chain Removal and
Replacement" and "Adjusting Chain Tension"
for chain replacement and adjustment of
chain tension. (see page 18).
Free-Wheeling Tine Assembly Removal and
Replacement
Complete steps 1 through 12 in previous
section, then proceed with the following:
1. After the bearing is off the rotor, unlock the
inner bearing that secures the tine assembly.
2. Remove outer free-wheeling tine assembly.
3. Place the new rotor assembly beside the old
assembly so that you have a pattern to follow
indicating the correct direction which the new
tines are to be installed. You can also refer to
the tines on the fixed tine assembly as an
example of proper assembly.
4. Once the tines are installed on the
free-wheeling assembly, re-install the inner
and outer bearing assemblies on the
free-wheeling assembly with the bearing
hubs facing toward the fixed tines. Make sure
that the inner bearing has a locking collar.
Hand tighten the nuts only.
5. Slide the new free-wheeling tine assembly on
the shaft making sure that the tine direction
matches the direction of the fixed tine
assembly. The bearing with the locking collar
faces the fixed tines and butts up against the
shoulder of the shaft.
6. Tighten the four nuts on the bearing
assemblies.
7. Lock the bearing collar in place with the
hammer and punch making sure the collar
locks in the same direction as the rotation of
the rotor.
8. Replace outer shaft bearing and re-install the
entire rotor assembly by reversing steps 1
through 12 in previous action. Instructions
are for one side. Both are procedurally
identical.
20
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