Great Plains 2N-3020 Operator Manual - Manual (Page 15)

13
Section 1 Drill Preparation and Setup
2/28/08 2N-2420 and 2N-3020 Two-Section Folding No-Till Drill 196-164M-A
Great Plains Mfg., Inc.
Marker Hydraulics
!
CAUTION!
Never allow anyone near the drill when cycling the markers.
1. Make sure the tractor hydraulic fluid reservoir is filled
to the proper level. It will take 1 gallon to charge the
dual marker cylinders.
2. With the drill unfolded and lowered, turn marker switch
on the control console to the left marker position.
3. With the marker unfolded, crack the hydraulic hose fit-
ting located at the base end of the left marker cylinder.
4. With the tractor at idle slowly work the tractor remote
lever to feed oil to the base end. Stop when you see oil
coming out around the hose ends. Tighten the hose-
end fittings.
5. Repeat step 3 and 4 for the hose-end fitting at the rod
end of the cylinder.
6. If dual markers are used, repeat steps 2, 3 and 4 for
the right marker cylinder.
7. Fold and unfold the marker slowly in order to work all
the air out of your marker hydraulics.
Frame Leveling Adjustment
Periodic frame leveling should not be necessary, but if you
are having trouble maintaining equal coulter depth across
the drill, check that the frame is level. When the drill is lev-
el, the box frames will be the same distance from the
ground at both ends of the drill.
Complete the steps under Bleed the Fold Hydraulics, page
12, before proceeding.
Refer to Figure 1-3.
IMPORTANT: Leave the control console switch in the
left marker position when bleeding the right marker cyl-
inder. Both markers are controlled by the left marker
switch if your markers have a sequence valve.
IMPORTANT: JIC fittings do not require high torque.
JIC and O-Ring fittings do not require sealant. Al-
ways use liquid pipe sealant when adding or replac-
ing pipe thread fittings. To avoid possible danger of
cracking hydraulic fittings from over tightening, do
not use plastic sealant tape.
1. Locate the threaded eye bolt at the base end of the
gauge-wheel cylinders (1). The eye bolt is locked in
place by a jam nuts. Observe the amount of thread ex-
posed above the upper nut and below the lower nut. If
the exposed threads are roughly equal, no initial ad-
justment is needed. Go to step 3.
2. If the exposed threads above and below the nuts are
not equal, loosen and adjust the jam nuts until the ex-
posed threads are within 3/8 inch of each other. Re-
peat for other end of drill.
3. Move the drill to a level area. With the drill unfolded,
check that the tool-bar cylinders are completely ex-
tended. Raise the drill to its highest position with the
field-lift cylinders. Keeping the tractor at an idle,
rephase the cylinders by holding the hydraulic lever on
for an additional 30 seconds. Immediately lower the
boxes until the coulters and openers are just ready to
touch the ground.
4. Move the gauge-wheel eye bolts (1) in or out until the
frames are level. When the frames are level, the open-
ers on the outside end of the drill will be the same
height as the center openers.
NOTE: Eye-bolt adjustments are easier if the drill is first
lowered to the ground to remove some of the force on the
cylinders.
5. Repeat the steps above until the drill is level end-to-
end when drilling in actual seeding conditions.
Figure 1-3
Wing Gauge Wheel Eye-Bolt Adjustment
12779