Great Plains YP1220 Operator Manual - Manual (Page 43)

Great Plains Manufacturing, Inc. Adjustments 39
03/14/2012 401-506M
Contact Wheel Drive
Refer to Figure 38
You can adjust the down pressure the contact wheel
exerts by adjusting the pressure on the spring.
Note: Do not adjust spring so tight that it will bottom out
when raised.
Refer to Figure 39
Before adjusting spring, raise planter and adjust wheel
travel to obtain 1
1 ⁄
2
in clearance above the main tire.
Refer to Figure 40
You can adjust the amount of travel for the contact wheel
by loosing the jam nuts and lengthening or shortening
the threaded rod.
Note: This adjustment controls the timing of the seed
meter drive when raising and lowering the planter.
Increasing the gap between the tires causes seed
flow to start and stop with the planter at a lower
height. Decreasing the gap will cause seed flow to
start and stop at a higher position.
Note: Be sure to check for spring bottoming after making
this adjustment.
Figure 38
Down Pressure Spring
21973
Figure 39
Contact Drive Wheel
225003
1 1 ⁄
2
in
Figure 40
Travel Adjustment
225003