Great Plains PD8070 Operator Manual - Manual (Page 26)

PD8070
401-266M 1/24/2006
24
Meter Drive Adjustments
The meter clutch and meter input shaft must be
aligned. Misalignment will cause meter malfunc-
tion and excessive meter-housing wear.
Periodically check vertical and horizontal align-
ment of meter clutch and meter input shaft.
Refer to Figure 12
1. Latch hopper onto hopper support.
2. Check that roll pin (1) in end of meter input
shaft is centered. When centered, equal
amounts of roll pin will protrude from both
sides of shaft.
3. Rotate meter input shaft so that roll pin is ver-
tical.
4. Rotate drive coupler (2) on meter clutch so
that slots are vertical.
5. Release meter clutch to engage meter input
shaft.
6. If shafts are aligned vertically, drive coupler
will engage with meter input shaft freely and
roll pin will extend equally on each side of the
drive coupler. Disengage clutch and repeat
steps checking for horizontal alignment.
7. If drive coupler does not freely engage meter
input shaft vertically or horizontally, loosen
the 5/16-inch nuts. Engage meter clutch.
Align meter clutch with meter input shaft.
8. Tighten 5/16-inch nuts to torque values listed
on Torque Values Chart, “Appendix,” page
52.
Row Unit Adjustments
Down Pressure
Springs provide down pressure necessary for
opener disks to open a seed trench. The springs
allow the row unit to float down into depressions
and up over obstructions.
You can adjust down pressure individually for
each row unit. Use only enough down pressure
to cut seed trench and maintain proper soil-firm-
ing over seed. Excessive down pressure will lead
to premature wear on row-unit components.
Refer to Figure 13
To adjust, lift T-handle.
• Move T-handle back to increase spring pres-
sure.
• Move T-handle ahead toward tractor to de-
crease spring pressure.
Refer to the charts to the right for the amount of
spring pressure at the opener for each spring
setting.
17891
Figure 12
Vertical Alignment
17781
Figure 13
Row Unit Spring Adjustment
Down Pressure Charts
Heavy-Duty Spring Package Pounds Pressure
First Holes (Closest to Tractor) 155
Second Holes 175
Third Holes 205
Fourth Holes 225
Fifth Holes (Closest to Hopper) 245
Medium-Duty Spring Package Pounds Pressure
First Holes (Closest to Tractor) 85
Second Holes 100
Third Holes 115
Fourth Holes 135
Fifth Holes (Closest to Hopper) 155