Amity Technology 2720, Operating Manual

Page: 37 / 95

7 - 8
7.10 Apron Chain
7.10.1 Apron Chain Tension: There are two options available for the apron chain: hook rod chain and
belted chain. Tension of the apron chain should not be excessively tight; however, the chain should
never drag on the ground or droop enough on the top to allow beets to be lost out the sides of the
machine.
NOTE: For hook rod chain, remove links if possible before tensioning. Hook rod chain is a high - wear
item and links may need to be replaced frequently. See section 11.9, Hook Rod Chains.
To adjust the chain:
1. Shift to park, disengage the PTO, lower the machine to the
ground, relieve hydraulic pressure, stop the engine, re-
move the ignition key, and wait for all moving parts to
stop before dismounting.
2. Open the left and right access doors.
3. Adjustments on the apron chain tension are made by
moving the front idler shaft, shown in Figure 7
- 19.
4. To adjust the shaft, loosen the jam nuts holding the adjustment rods on the bearing mounting
arms.
5. Use the adjusting rod and slide the bearing mounting
arms apart or together.
NOTE: Adjusting the lower shaft too close to the lifter
wheels can cause loss of beets.
6. Always measure the dimension between the shaft cen-
ters when making adjustments, keeping the dimension
equal on the left and right sides.
NOTE: Distance (A), shown in Figure 7 - 20, between top and bottom chain should be kept at 11 - 12
inches (27.9 – 30.5 cm), measured from the centerline of chains.
7. Tighten the jam nuts on the adjusting rods, and be sure the adjusted apron chain does not con-
tact the lifter wheels.
8. Close and secure the access door before starting the machine.
NOTE: Machines with rubber paddles have zero spacers installed on the lower apron shaft. Machines
with plastic paddles have four spacers installed on the lower apron shaft, with additional spacers in-
cluded in the hardware kit.
Figure 7 - 20: Distance between Top and Bottom Chains
Figure 7 - 19: Apron Chain Front Idler Shaft