Sprocket indexing charts, Twin row sprocket indexing (1 of 3) – Great Plains YP4425A Material Rate User Manual
Page 30
26
YP3025A, YP4025A and YP4425A
Great Plains Manufacturing, Inc.
401-627B
2014-05-13
Sprocket Indexing Charts
Metric indexing charts begin on page 73.
Twin Row Sprocket Indexing (1 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 1 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
17000
14167
7
3
4
6
16
17500
14583
19
10
16
13
16
18000
15000
19
10
16
13
16
18500
15417
3
7
19
10
16
19000
15833
4
6
19
9
12
19500
16250
4
1
15
17
12
20000
16667
18
11
15
14
12
20500
17083
8
2
15
5
8
21000
17500
8
5
11
5
8
21500
17917
14
15
11
18
8
22000
18333
14
15
11
18
4
22500
18750
12
9
7
1
4
23000
19167
10
19
7
3
4
23500
19583
10
19
7
3
4
24000
20000
16
13
3
10
19
24500
20417
6
13
3
10
19
25000
20833
6
4
3
7
19
25500
21250
1
17
18
14
15
26000
21667
2
17
18
14
15
26500
22083
2
8
18
11
15
27000
22500
5
5
18
18
11
27500
22917
5
2
14
18
11
28000
23333
17
12
14
15
11
28500
23750
9
1
14
3
7
29000
24167
9
6
10
3
7
29500
24583
13
16
10
19
7
30000
25000
13
16
10
19
3
30500
25417
13
10
6
7
3
31000
25833
9
10
6
4
3
36076D
Air-Pro
®
Meter Stagger Timing Chart (U.S. customary units)