Great Plains 8030P G1021 Operator Manual - Manual (Page 16)

60303P and 80303P Three-Point Planter 401-008M 5/15/06 14 Great Plains Mfg., Inc.
Section 4 Adjusting Planting Rates
This section discusses the adjustments and settings for
seeding and chemical rates.
Planting Rates
Please read the following sections. Complete under-
standing of this process will help to prevent problems.
Transmission Adjustment
Planting population changes are accomplished by set-
ting the sprocket transmission. By changing the
combination of sprockets the desired planting popula-
tions can be achieved.
To change the sprocket combination, do as follows:
1. Select the sprocket combination for your planting pop-
ulation from the" Planting Rates for Finger Pickup
Corn Meter Chart" in this section on page 21.
2. Remove the cover from the transmission by loosen-
ing the knob on the cover.
3. Release the spring tensioner on the idler,
see Figure 4-1.
4. Remove the chain and sprockets.
5. Exchange the sprockets with the desired sprockets,
selected in step 1, on the storage bracket.
6. Place the sprockets on the drive/driven shafts ac-
cording to the " Planting Rates for Finger Pickup
Corn Meter Chart" in this section on page 21.
7. Loop the chain over the sprockets and between the
2 idlers.
8. Turn the idler counter-clockwise (ccw) to take up the
slack. Just before the idler sprocket reaches its limit
place the head of the sleeve lever mount in between
the two most vertical teeth of the idler sprocket. Ro-
tate the spring tensioner lever over-center to apply
spring tension to hold the idler tight.
9. Replace the transmission cover and hand tighten
the knob.
Checking Planting Population
After setting the transmission, ALWAYS check the plant-
ing population in the field.
Follow these steps to check the planting population:
1. Tie up 1 or more closing disks and wheels with a
chain or heavy wire to the hopper support. Releas-
ing the spring pressure on the disks and wheels will
make this easier. Adjust the planting depth to a shal-
low setting. It may be necessary to tie up the seed
lok wheels so that the seeds are easier to find.
2. Plant at a normal speed for a short distance.
Note: When not in use, keep all extra sprockets on the
storage bracket. 3. Measure 1/1000 of an acre. For 30" row planter
1/1000 of and acre is 17' 6".
4. Multiply the number of seeds counted by 1000. This
gives you total population.
If the planting population is significantly different than
the desired planting population, make the following
checks:
•
Check the sprocket combination in the transmission,
refer to the " Planting Rates for Finger Pickup Corn
Meter Chart" in this section on page 21.
•
Check the tire pressure in the gauge wheels, see Spec-
ification in " Section 9 Specifications" on page 33.
•
Check for meter malfunction, see Finger Pickup Corn
Spring Tensioner on Transmission
Figure 4-1
12349
Example: (for one row)
•
30" row spacing
•
17' 6" of seed trench measured off
•
24 seeds counted in measured
distance
24 Seeds Counted X 1000 =
24,000 Plant Population Per Acre
Section 4
Adjusting Planting Rates