Great Plains 3N4010HDA Predelivery Manual - Manual (Page 31)

Great Plains Manufacturing, Inc. Air Drill Pre-Delivery 29
10/10/2008 196-444Q
Install Lift Switch
Refer to Figure 30
Lift switch components are shipped with the air cart. 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.
89. Select one:
464820520S1 DJ SWITCH SPDT W/WISKER & WIRE
The switch includes mounting fasteners. The bracket
is already installed on the drill, but may need some
adjustment.
Strain relief and wire must always point down to pre-
vent moisture from entering the switch. Switch mount
screws may need to be reversed to point wire down.
Rubber O-rings on the screws must be installed on
either side of the switch housing.
The whisker should extend under the upper paral-
lel 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.
Refer to Figure 31 (which depicts cart hitched - mating of the
bulkheads is covered in the Operator Manual, and is called for
a step 127 of this manual)
90. Select one:
467980474 8.5 EXTNSION CABLE CPC TO CPC
Connect one end of this cable to the lift switch cable.
Route the other end to the rear hitch. This cable is
secured with ties at a later step.
The whisker should operate (prevent seeding) whenever
the openers are just beginning to lift off the ground. See
the drill Operator manual for adjustment.
Route Lighting Cable
91. Locate the lighting cable, usually coiled and tied to
the rear hydraulic hoses. Select a short cable tie. Tie
the drill lighting cable to the remaining top small slot-
ted holes on the hose bracket
installed at step 57.
Note: For reference, the switch wiring is:
Black (switch) to black (extension)
Red (switch) to red (extension)
Switch closed when drill is raised
Figure 30
Implement Lift Switch
27069
1
75
75
1
75
1
Figure 31
Cables at Rear Hitch
28193
74
76
76
74