Great Plains 3PNG15 Operator Manual - Manual (Page 49)

10/06/2008 202-553M
Great Plains Manufacturing, Inc. Appendix B 45
Appendix B
Initial Marker Setup (Option)
Install marker(s) per manual supplied with markers.
Terminate Marker Hoses
Feed-line hoses terminate in 1 ⁄
2
in male NPT fittings. The
marker kits do not include couplers. See hydraulic dia-
gram on page 44.
1. Adapt the NPT fittings to the style and size of coupler
required to connect the drill to a hydraulic source for
system charging.
2. If fitting the final couplers for the tractor to be used
with this drill in the field, apply liquid sealant to the
threads before making the connections. Do not use
plastic tape sealant.
Charge Hydraulic System
The hydraulic system is typically shipped without hydrau-
lic fluid (due to the open hose ends).
3. Be sure tractor hydraulic reservoir is full.
4. With the markers unfolded, crack the hydraulic hose
fittings at the base end of the cylinders. With your
tractor at an idle speed, activate your tractor hydrau-
lic valve until oil seeps out around the hose ends.
Retighten the fittings.
5. Repeat step 4 for the hose-end fittings at the rod end
of the cylinders.
6. Fold and unfold the markers slowly to work all the air
out of your marker hydraulics. Use caution when
folding and unfolding the marker for the first time and
check for pinching and kinking of hoses.
Marker Extension Setup
Check the marker extension, even if already dealer-
installed. The marker’s own installation instructions may
not have covered setting the correct marker arm length,
or may have specified a length not optimal for your initial
planting.
Refer to Figure 38
Set the initial marker extension
to the value for your
drill and row spacing from the table on the next page.
Measure from the centerline of the end row unit (outer
unit of a twin pair), whether that row is used or not, to the
mark left in the ground when the drill is lowered.
E
Figure 38
Marker Extension
E