Great Plains PD8070 Operator Manual - Manual (Page 61)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 57
2014-07-23 Table of Contents Index 401-479M
Press Wheel Centering
If one press wheel is running in the seed trench, or the
wheels are not centered over the trench, the angle
of
the press wheel assembly can be adjusted as follows:
Refer to Figure 64
1.
Determine how far, and in which direction, the press
wheel assembly needs to move to center the wheels.
2. Raise planter and install lift assist cylinder locks. See
“Lift Cylinder Lock-Up” on page 62.
3. Pick some reference points on the unit to be
adjusted and an adjacent row unit. Measure the
distance between them.
4. Loosen the
1 ⁄
2
inch hex-head bolts , .
Note: Do not loosen any square-head bolts forward of the
hex-head bolts.
5. Turn the hex head cam under the forward hex
head bolt , and obtain the new distance between
the reference points.
6. Tighten both hex head bolts , .
Single Press Wheel
The single 6
1 ⁄
2
×12 press wheel with dual closing disks is
one of two available press wheels for the PD8070. See
page 96 for ordering information.
For proper seed-to-soil contact, the closing disks must
have enough down pressure to close the seed furrow
without unnecessary soil compaction.
Refer to Figure 65
To adjust down pressure on closing disks
, ratchet
spring cam to next cam height by turning head of support
bolt
clockwise.
Figure 64
Dual Press Wheel Centering
17889
1
2
3
4
1
2 3
4
3
2 3
Figure 65
Closing Disk Adjustment
14913
2
1
1
2