Great Plains 3N-3020 Operator Manual - Manual (Page 43)

3/29/2012 196-366M
41 Adjustments
Electric Clutch Switch Adjustment
To adjust the height at which seed is turned off,
follow these steps.
Refer to Figure 27
1. Locate the height switch at center of rock-
shaft.
2. Lower the implement until it is at a height
where seeding should start (usually just
above the ground). Securely support frame at
this height with jack stands or blocks.
3. Turn off the tractor and remove the key.
Refer to Figure 28
4. Loosen the cam clamp (1) on the rockshaft
and turn until the switch roller (2) is just start-
ing to make contact with the ramp surface.
16126
15160
14550
Refer to Figure 29
5. Raise the implement fully and check that the
switch is compressed as shown.
Figure 27
Height switch
Figure 28
Cam (adjustment)
Figure 29
Switch (compressed)