7
-
4
7.2.3 Flail Size
Drum 1 height as shown in Figure 24 above is designed to run higher than the rear
drums 2&3. This is based on its function which is to remove the majority of the beet leaves leaving
only a few petioles or leaf stems for the 2
nd
and 3
rd
drums to remove from the crown of the beet.
The rear two drums which are designed to be run level with each other, counter rotate so the flails
hit from different directions to clean the front and back of the beet crown as illustrated in Figure 25
below. This is where the 50 series and 00 series differ significantly and described in the following
sections.
7.2.4 50 Series
The design feature that enables the 50 series defoliator to do more work faster is
the shrouded front steel drum 1. The shrouded drum 1 is able to remove the majority of foliage
leaving only a couple of inches of petioles and keeping the rear drums clear of excess leaves allow-
ing them to perform their jobs more effectively. Drum 2 rotates with the direction of travel its job is
to the clean the front side of the beet as shown in Figure 25. The 2
nd
drum has 10 sets of flails com-
pared to the 6 of the rear drum because of the rotational direction makes for a less aggressive
cleaning action. Drum #3 rotates against the direction of travel used 6 sets of flails and its flails con-
tact the back half of the beet removing the final petioles from the beet crown. By looking to see
where the petioles remain will let you know if the 2
nd
, 3
rd
or both drums need to be raised or low-
ered. Lower or raise the hitch to adjust for level and lower rear struts to adjust drum 2 and drum 3
flail height. Both hitch and rear strut adjustments will affect the other drum so double check flail
heights for both drums after making any adjustments.
7.2.5 00 Series
00 series defoliators do not have the front shroud that the 50 series have and be-
cause of this the front drum doesn
’
t do as much work, leaving more petioles and even some leaves
for the 2
nd
and 3
rd
drums to clean up. Similar to the 50 series the 00 series defoliator needs to run
level with both the 2
nd
and 3
rd
drums at the same height; however the 2
nd
drum (because of the in-
creased petioles) will not be able to clean the front of the beet by itself, and needs the 3
rd
drum to
help. In order to do that travel speed must to be decreased so additional strikes are made by the
flails to each beet crown to perform the quality of job desired. Adjustments are performed in the
same manner with the front hitch adjusting machine level and the rear struts raised or lower to ad-
just for flail height.
DRUM #1
DRUM #2
DRUM #3
Figure 7
-
4: Defoliation Process
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