75 cm twin row sprocket indexing – Great Plains YP4425A Material Rate User Manual
Page 79
Great Plains Manufacturing, Inc.
Appendix B - Metric Charts
75
2014-05-13
401-627B
75 cm 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 70/75/76/91 cm
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/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
123736
115487
113668
94723
15
12
18
16
1
125081
116742
114904
95753
15
12
3
16
1
126426
117997
116139
96783
19
16
3
16
6
127771
119253
117375
97812
19
16
3
16
6
129116
120508
118610
98842
19
16
7
16
10
130461
121763
119846
99871
4
16
7
16
10
131805
123018
121081
100901
4
16
7
16
10
133150
124274
122317
101931
4
16
11
16
14
134495
125529
123552
102960
8
16
11
16
14
135840
126784
124788
103990
8
16
11
16
14
137185
128040
126023
105019
8
16
15
16
18
138530
129295
127259
106049
12
16
15
16
18
139875
130550
128494
107079
12
16
15
16
18
141220
131805
129730
108108
12
16
15
16
3
142565
133061
130965
109138
16
16
19
16
3
143910
134316
132201
110167
16
16
19
16
3
145255
135571
133436
111197
16
16
19
16
7
146600
136827
134672
112227
16
16
4
16
7
147945
138082
135907
113256
16
16
4
16
7
149290
139337
137143
114286
16
16
4
16
11
150635
140593
138378
115315
16
16
8
16
11
151980
141848
139614
116345
16
16
8
16
11
153325
143103
140850
117375
16
16
8
16
15
154670
144358
142085
118404
16
16
12
16
15
156015
145614
143321
119434
16
16
12
16
15
157360
146869
144556
120463
16
16
12
16
15
158705
148124
145792
121493
16
16
16
16
19
160050
149380
147027
122523
16
16
16
16
19
161394
150635
148263
123552
16
16
16
16
19
36076M
Air-Pro
®
Meter Stagger Timing Chart (metric)