Sprocket indexing charts – Great Plains YP2425A Material Rate User Manual
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YP2425A
Table of Contents Metric Charts
Great Plains Manufacturing, Inc.
401-626B
Table of Contents Metric Charts
2012-02-29
Sprocket Indexing Charts
30 inch Twin Row Sprocket Indexing
Note: This is NOT a seed rate chart.
This is a chart for staggering seed spacing
between rows of a twin-row planter.
Verify sprocket tooth position with the top length of chain taut.
Twin Row 30in
Set front meter to tooth “1”.
Page 1 of 2
Set rear meter to indicated Initial tooth number.
Advance or Retard to adjust - see instructions in Seed Rate Manual.
These Columns are for Fine Adjustment Only
Population
Initial Rear
20% Rear Seed Drop Adjust
40% Rear Seed Drop Adjust
Seeds/Acre
Tooth Number
Retard
Advance
Retard
Advance
17000
7
3
4
6
16
17500
19
10
16
13
16
18000
19
10
16
13
16
18500
3
7
19
10
16
19000
4
6
19
9
12
19500
4
1
15
17
12
20000
18
11
15
14
12
20500
8
2
15
5
8
21000
8
5
11
5
8
21500
14
15
11
18
8
22000
14
15
11
18
4
22500
12
9
7
1
4
23000
10
19
7
3
4
23500
10
19
7
3
4
24000
16
13
3
10
19
24500
6
13
3
10
19
25000
6
4
3
7
19
25500
1
17
18
14
15
26000
2
17
18
14
15
26500
2
8
18
11
15
27000
5
5
18
18
11
27500
5
2
14
18
11
28000
17
12
14
15
11
28500
9
1
14
3
7
29000
9
6
10
3
7
29500
13
16
10
19
7
30000
13
16
10
19
3
30500
13
10
6
7
3
31000
9
10
6
4
3
29715A
Air-Pro
®
Meter Stagger Timing Chart