70 cm twin row sprocket indexing (cont.) – Great Plains YP4425A Material Rate User Manual
Page 78
74
YP3025A, YP4025A and YP4425A
Great Plains Manufacturing, Inc.
401-627B
2014-05-13
70 cm Twin Row Sprocket Indexing (cont.)
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 70/75/76/91 cm
Set front meter to tooth “1”.
Page 2 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/Hectare
Initial Rear
20% Rear Seed Drop Adjust
40% Rear Seed Drop Adjust
70.0 cm
75.0 cm
76.2 cm
91.4 cm
Tooth Number
Retard
Advance
Retard
Advance
84732
79083
77838
64865
17
14
1
4
18
86077
80339
79073
65895
17
14
2
11
18
87422
81594
80309
66924
5
14
2
8
18
88767
82849
81544
67954
5
18
5
8
14
90112
84104
82780
68983
2
18
17
15
14
91457
85360
84015
70013
1
18
17
12
14
92802
86615
85251
71043
1
3
9
12
14
94147
87870
86487
72072
6
3
9
19
10
95492
89126
87722
73102
6
3
13
19
10
96837
90381
88958
74131
10
7
13
16
10
98182
91636
90193
75161
10
7
13
4
6
99527
92891
91429
76191
10
7
9
4
6
100872
94147
92664
77220
14
11
17
4
1
102216
95402
93900
78250
14
11
17
8
2
103561
96657
95135
79279
14
11
5
8
2
104906
97913
96371
80309
18
11
2
8
5
106251
99168
97606
81339
18
15
2
12
17
107596
100423
98842
82368
18
15
1
12
17
108941
101679
100077
83398
3
15
1
12
9
110286
102934
101313
84427
3
19
6
16
9
111631
104189
102548
85457
3
19
6
16
13
112976
105444
103784
86487
7
19
10
16
13
114321
106700
105019
87516
7
4
10
16
13
115666
107955
106255
88546
7
4
10
16
9
117011
109210
107490
89575
11
4
14
16
17
118356
110466
108726
90605
11
8
14
16
17
119701
111721
109961
91635
11
8
14
16
5
121046
112976
111197
92664
15
8
18
16
2
122391
114231
112432
93694
15
12
18
16
2
36076L
Air-Pro
®
Meter Stagger Timing Chart (metric)