Great Plains 3PNG15 Material Rate - Manual (Page 4)

202-579B 12/01/2010
2 3PNG12 & 3PNG15 Great Plains Manufacturing, Inc.
Main Seed Box Planting
Main Seed Box Rate
Initial seeding rate from the main box is controlled by:
• Drive Type on the ground drive,
• Main box Seed Rate Handle, and
• Seed Cup Door setting
Note: The main seed box rate is unaffected by the Small
Seed Rate Handle and Small Seed/Native Grass
sprocket settings.
Setting Drive Type
Main seed box Drive Type is a ground drive sprocket
combination. There are no sprocket changes at the main
seed box itself.
All necessary sprockets are already on the shafts, and
need only be inverted and/or shifted into place.
Before setting the drive type, rotate the gauge wheels.
Check that seed cups, seed tubes and drives are work-
ing properly and free from foreign material.
Select the drive type from the seed rate charts. The drive
type varies by seed type and intended population.
Refer to Figure 1
1.
Find your drive type in the seed rate charts of this
manual.
2. Find the drive type sprocket set required in Figure 1
or the table at right.
Note: Whether sprockets are changed or not, verify
chain slack, and check that clip openings on
removable links are facing away from the direction
of chain travel.
3. If the double sprocket is already configured as
needed, skip to step 12.
Lower double 20T+35T sprocket.
Invert on shaft to change.
Upper single jackshaft sprockets (19T or 39T).
Slide aside to change.
1
2
Figure 1
Drive Type Sprockets
16400
1
2
Type Speed
Type 1 20T Driven
35T Driving
39T -
Type 1A 20T Driven
35T Driving
19T 2x Type 1
Type 2 35T Driven
20T Driving
39T 1 ⁄
3
Type 1
Type 2A 35T Driven
20T Driving
19T 2 ⁄
3
Type 1
1 2