Great Plains 3PYP Operator Manual - Manual (Page 59)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 55
2014-09-09 Table of Contents Index 401-312M
Height Switch Adjustment
Refer to Figure 56
The 3PYP includes a sensing switch that signals the
seed monitor (and activates the meter drives), when the
planter is lowered for planting.
Although factory-preset for typical planting conditions,
Great Plains recommends adjusting this switch for your
exact field conditions and planting depth. Check the
switch seasonally thereafter, or when planting conditions
change. Also perform this adjustment if the switch is
replaced or dislodged.
The switch is located on the parallel arms connecting the
planter mainframe to the air cart.
Refer to Figure 57
1. Lower the planter to the height at which seed
delivery is to begin.
2. Loosen bolts holding switch bracket to frame.
3. Move bracket and switch up or down so switch toggle
arm
makes contact with upper parallel arm .
4. Move switch/bracket down
1 ⁄
4
inch. Tighten bolts.
Note: It may be necessary to loosen the screws
holding the switch to the bracket and rotate the
switch slightly on the bracket.
Note: If the switch is ever completely removed, be sure to
replace it with the cable exit at the bottom. If the
cable is at the top, switch operation is reversed, and
moisture will accumulate in the switch, causing
eventual switch failure.
Figure 56
Height Switch Location
29193
1
1
Figure 57
Height Switch Adjustments
25442
2 6
3
1
4
5
2 3
4 5
6