Sprocket indexing - metric, 70 cm twin row sprocket indexing – Great Plains YP4425A Material Rate User Manual
Page 77
Great Plains Manufacturing, Inc.
Appendix B - Metric Charts
73
2014-05-13
401-627B
Sprocket Indexing - Metric
70 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 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/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
45728
42680
42008
35006
7
3
4
6
16
47073
43935
43243
36036
19
10
16
13
16
48418
45190
44479
37066
19
10
16
13
16
49763
46446
45714
38095
3
7
19
10
16
51108
47701
46950
39125
4
6
19
9
12
52453
48956
48185
40154
4
1
15
17
12
53798
50212
49421
41184
18
11
15
14
12
55143
51467
50656
42214
8
2
15
5
8
56488
52722
51892
43243
8
5
11
5
8
57833
53977
53127
44273
14
15
11
18
8
59178
55233
54363
45302
14
15
11
18
4
60523
56488
55598
46332
12
9
7
1
4
61868
57743
56834
47362
10
19
7
3
4
63213
58999
58070
48391
10
19
7
3
4
64558
60254
59305
49421
16
13
3
10
19
65903
61509
60541
50450
6
13
3
10
19
67248
62765
61776
51480
6
4
3
7
19
68593
64020
63012
52510
1
17
18
14
15
69938
65275
64247
53539
2
17
18
14
15
71283
66530
65483
54569
2
8
18
11
15
72628
67786
66718
55598
5
5
18
18
11
73972
69041
67954
56628
5
2
14
18
11
75317
70296
69189
57658
17
12
14
15
11
76662
71552
70425
58687
9
1
14
3
7
78007
72807
71660
59717
9
6
10
3
7
79352
74062
72896
60746
13
16
10
19
7
80697
75317
74131
61776
13
16
10
19
3
82042
76573
75367
62806
13
10
6
7
3
83387
77828
76602
63835
9
10
6
4
3
36076K
Air-Pro
®
Meter Stagger Timing Chart (metric)