Implement lift switch – Great Plains 3N4010HDA Operator Manual User Manual
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3N-4010HDA
Great Plains Manufacturing, Inc.
196-444M
2013-09-24
Implement Lift Switch
The lift switch turns the air cart seed metering on and off
as the 3N-4010HDA is lowered and raised. The switch
is mounted at the upper end of the parallel arms on the
right rear wheel assembly.
When the 3N-4010HDA is raised, the upper parallel arm
contacts the flexible switch arm extension (whisker)
and operates the switch.
If the switch is otherwise operating properly, but metering
is not stopping when raised, or not resuming when
lowered, the switch may need some adjustment.
The whisker should extend under the parallel arm
enough so that the whisker cannot slip off the arm when
the drill is raised, but not so far it bends severely. To
adjust, loosen the bolts
attaching the switch to the
bracket and slide the switch left or right as needed and
re-tighten.
The whisker should operate (prevent seeding) whenever
the openers are just beginning to lift off the ground. To
adjust:
1.
Lower the implement until at a height where seeding
should start (usually just above ground). Set the lift
circuit to neutral.
2.
Turn off the tractor and remove the key.
3.
Securely support implement frame at this height with
jack stands or blocks.
4.
Loosen switch bracket bolts
.
5.
Slide switch up until the flexible switch toggle is just
past the point at which the switch clicks (the
turn-off-seeding state).
6.
Slide it down carefully until it switch clicks once more
(the turn-on-seeding state).
7.
Tighten the bolts.
Note: For reference, the switch wiring is:
Black (switch) to black (extension)
Red (switch) to red (extension)
Switch closed when drill is raised
Figure 59
Implement Lift Switch
27069
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