Great Plains YP625PD Material Rate - Manual (Page 8)

6 YP625PD/TD, YP925TD Table of Contents Great Plains Manufacturing, Inc.
401-754B Table of Contents 09/29/2011
Meter Pressurization
Refer to the Operator Manual for the procedure for fine
tuning meter pressurization.
Start with pressures from below and on page 7, which
are based on crop, and for corn, seed shape and density.
Note: These are suggested initial (starting) pressures.
Adjust them up or down per the procedure in the
Operator Manual.
Corn: Reading a Pressure Chart (below, next page)
1.
Pick the chart based on seed shape (flat, round).
Example: round corn
2. Pick a line based on seed size (large, small).
Example: large round corn, the right line below
3. Find the seed density on the bottom scale.
Example: 2800 seeds/kg
4. Read the suggested starting pressure on the left
scale, where the line (example shown as dotted
gray) intersects the density.
Example: 3.4 inches of water
Initial seed inlet Shutter for corn is: 3
Initial Meter Pressurization: Milo
1.5 inches of water (all disk, any seed density)
Initial seed inlet Shutter: 1
Initial Meter Pressurization: Soybeans
2.0 inches of water (84 cell disk, any seed density)
3.0 inches of water (168 cell disk, any seed density)
Initial seed inlet Shutter: 2
Initial Meter Pressurization: Round Corn
29725
( y )
Pressure/Seed Comparison
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
900 1100 1300 1500 1700 1900 2100 2300 2500 2700 2900 3100
Seeds Per Pound
Unit Weight (80K)
Linear (Round Corn Large)
Linear (Round Corn Small)
Meter Pressure (in/w
a
ter)
5
4.5
3.5
3
2.5
2
1.5
1
0.5
0
88.9 72.7 61.5 53.3 47.1 42.1 38.1 34.8 32.0 29.6 27.6 25.8
4 817-794C & 817-796C
Round Corn-Large
817-795C & 817-797C
Round Corn-Small
Meter Pressure (in/w
a
ter)
Disks
Disks
6800 6400 6000 5500 5100 4600 4200 3700 3300 2900 2400 2000
Overlay for
31441 Seeds Per Kilogram 29725
Example
Example
Null4:
Meter Pressur
ization in inches of W
ater
Null4:
Meter Pressur
ization in inches of W
ater