Great Plains LS12 Operator Manual - Manual (Page 18)

LS10 and LS12
117-055M 3/20/06
16
Seeding Rate Adjustment
To calibrate the seeding rate, the seeder and plow
must be hooked to the tractor that will be used in
the field and the hydraulic drive must be hooked to
the tractor remotes.
IMPORTANT: Calibrate the seeding rate with a
full box of seed.
1. Find desired seeding rate and ground speed
on seeding rate chart, page 17. Determine
how many shaft rpms are needed for your
seeding rate and ground speed.
2. With tractor parked and idling in neutral, ad-
just tractor throttle up to field rpm.
3. Engage hydraulic drive. Count the number of
seed-cup-shaft revolutions per minute by us-
ing a tachometer.
4. Stop hydraulic drive. If shaft is turning too
slowly or quickly, loosen black knob and ad-
just flow control on hydraulic drive. See Figure
9. Move lever down to increase rpms. Move
lever up to reduce rpms.
5. When satisfied with flow-control setting, lock
black knob.
Seed Cup Doors
For rice and other small grains, move seed-cup-
door handles to the highest position. For larger
seeds, lower handles to the second or third posi-
tion to reduce seed cracking. For seed-cup clean
out, move handles to the fourth, wide-open posi-
tion. Make sure all handles are in the same
position before seeding.
Figure 9
Flow Control Dial
18164
16491
Figure 10
Seed-Cup-Door Handle
Adjustments