Great Plains PD8070 Operator Manual - Manual (Page 24)

20 PD8070 Table of Contents Index Great Plains Manufacturing, Inc.
401-479M Table of Contents Index 2014-07-23
Mud Scrapers (Optional)
Refer to Figure 18
The mud scraper
removes build-up that might interfere
with contact drive wheel rotation and planting depth.
1. Loosen bolts and .
2. Pivot the scraper around bolt until the clearance
between the scraper and tire is 3 to 6 mm
(
1 ⁄
8
to
1 ⁄
4
inch).
3. Tighten bolts.
Ridge Planting
To prepare the planter for ridge planting, you must lower
the gauge wheels by inverting the cylinder mounting
blocks
.
Refer to Figure 19
Standard planting is shown at
.
Ridge planting is shown at .
1. Block up the frame to remove weight from tires.
2. At each of the four lift cylinders, remove the
four
5 ⁄
8
inch cap screws attaching the mounting
blocks to the frame.
3. Invert mounting blocks and reinstall cap screws.
Torque to specification as listed on the “Torque
Values Chart” on page 100.
Re-Phasing Lift System
In typical use during a single planting operation, it is
normal for the lift cylinders to get out of phase, resulting
in uneven raising and lowering of the PD8070 Planter.
Every 8- to 10 passes, re-phase the cylinders with this
procedure:
1. Raise the planter completely, and hold the hydraulic
lever or switch in Retract for several seconds after
the planter reaches full elevation, or until all cylinders
are fully retracted.
2. When all cylinders are fully retracted, momentarily
reverse (Extend) the control to lower the planter
12 mm (
1 ⁄
2
inch).
2
3
4
1
Figure 18
Gauge Wheel Mud Scraper
25484
1
2 3
2
4
1
2
3
Figure 19
Cylinder Mounting Blocks
14958
3 2
1 1