Twin row sprocket indexing (3 of 3) – Great Plains YP4425A Material Rate User Manual
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YP3025A, YP4025A and YP4425A
Great Plains Manufacturing, Inc.
401-627B
2014-05-13
Twin Row Sprocket Indexing (3 of 3)
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 30 & 36 Inch
Set front meter to tooth “1”.
Page 3 of 3
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 Seeds/Acre
Initial Rear
20% Rear Seed Drop Adjust
40% Rear Seed Drop Adjust
30 in. Twin
36 in. Twin
Tooth Number
Retard
Advance
Retard
Advance
46000
38333
15
12
18
16
1
46500
38750
15
12
3
16
1
47000
39167
19
16
3
16
6
47500
39583
19
16
3
16
6
48000
40000
19
16
7
16
10
48500
40417
4
16
7
16
10
49000
40833
4
16
7
16
10
49500
41250
4
16
11
16
14
50000
41667
8
16
11
16
14
50500
42083
8
16
11
16
14
51000
42500
8
16
15
16
18
51500
42917
12
16
15
16
18
52000
43333
12
16
15
16
18
52500
43750
12
16
15
16
3
53000
44167
16
16
19
16
3
53500
44583
16
16
19
16
3
54000
45000
16
16
19
16
7
54500
45417
16
16
4
16
7
55000
45833
16
16
4
16
7
55500
46250
16
16
4
16
11
56000
46667
16
16
8
16
11
56500
47083
16
16
8
16
11
57000
47500
16
16
8
16
15
57500
47917
16
16
12
16
15
58000
48333
16
16
12
16
15
58500
48750
16
16
12
16
15
59000
49167
16
16
16
16
19
59500
49583
16
16
16
16
19
60000
50000
16
16
16
16
19
36076J
Air-Pro
®
Meter Stagger Timing Chart (U.S. customary units)