Amity Technology 2720, Operating Manual

Page: 33 / 95

7 - 4
7.5 Pinch Point Width
Matching pinch point to crop size is important to maximize yield and minimize tare. If the pinch point is
too wide, smaller roots may be left in the ground, resulting in a larger digging depth. In turn, more dirt
will be put in the harvester. If the pinch point is too narrow, larger roots may be sliced. The pinch point
width is adjusted by changing the quantity of half
- moon spacers (B), part number 50747. To add or re-
move spacers:
1. Loosen the hex nuts holding the lifter wheel tight to the hub. Only the center bolt on the half - moon
spacer is required to be removed. Adjust the other half of the spacer to allow another spacer to be
added or removed.
2. Add or remove spacers (B) as necessary. It is most common to work in sets of four half - moon spac-
ers.
3. Tighten the lifter wheel bolts.
NOTE: The addition or subtraction of one spacer (B)
will add or subtract 0.1875 inches (4.8 mm), respec-
tively, from the pinch point width.
NOTE: Pinch point may need to be readjusted over
time due to wear on the lifter wheels.
IMPORTANT: As a general rule, the pinch point spac-
ing (A) should be adjusted as shown in Table 7 - 1.
Figure 7 - 9: Pinch Point Width
Figure 7 - 10: Pinch Point Spacer Adjustment
Table 7 - 1: Pinch Point Width
Pinch Point Width Average Beet Weight
1½ - 1¾ in.
[3.8 - 4.4 cm]
0.9 - 1.2 lb.
[0.41 - 0.54 kg]
1¾ - 1⅞ in.
[4.4 - 4.7 cm]
1.1 - 1.5 lb.
[0.50 - 0.68 kg]
1⅞ - 2 in.
[4.7 - 5.0 cm]
1.3 - 1.7 lb.
[0.59 - 0.77 kg]