Great Plains YP1625A Operator Manual - Manual (Page 53)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 49
2013-08-13 Table of Contents Index 401-625M
Setting Material Rates
Planting Rate
Adjusting the planting rate requires the following:
1. setting seed rate:
For ground-drive planters:
adjusting drive speed Range sprockets, and
adjusting Transmission sprockets,
For hydraulic drive planters, setting monitor and
drive control channel,
2. preparing seed meters, including disks, shutters and
meter pressurization,
3. checking tire pressure.
4. checking planting rate.
Ground Drive Planting Rate
Wing Rate Mismatch Risk:
There are separate left and right contact drives. Each drives
one wing. Sprockets must be set identically on both side, per
decals on each drive.
Refer to Figure 56 and Figure 57
Note: Contact wheels
turn in opposite direction from
main ground tires.
Drive Speed Range Sprockets
Select Range sprocket pairing for your seed and rate
from the Seed Rate manual.
Loosen Range idler and remove chain . Remove
retaining pins from shafts and install speed Range
sprockets called for in chart. Additional sprockets are on
storage towers behind the reversing drive plate.
Population Target and Wing Rate Risk:
Make sure the correct sprockets have been installed in the
DRIVING and DRIVEN locations.
Reroute chain over sprockets and idlers as shown.
Transmission Sprockets
Select Transmission sprocket pairing for your seed and
rate from the charts in the Seed Rate manual.
Loosen idler and remove drive chain . Remove
lynch pins from shafts. Install sprockets per chart.
Reroute drive chain over sprockets and idlers as shown.
Move idlers into chains for
1 ⁄
4
inch (6 mm) slack in the
longest spans. Tighten idlers and re-install lynch pins.
Store and pin removed sprockets on storage towers.
Figure 56
Left Contact Drive
29745
Population Target Risk:
Tire pressure matters for both ground and hydraulic drive.
Incorrect tire pressure causes incorrect ground speed readout.
On ground drive, incorrect pressure causes incorrect or
inconsistent seed metering.
1
3
4
2
DRIVING
DRIVEN
RANGE TRANSMISSION
DRIVEN
DRIVING
5
1
Figure 57
Right Contact Drive
29746
1
3
4
2
DRIVING
DRIVEN
RANGE TRANSMISSION
DRIVEN
DRIVING
5
2 3
4 5