Great Plains 2N-3020 Assembly Instructions - Manual (Page 7)

7 4/9/04 24- and 30-Foot, No-Till Flat Fold Marker Option 113-502M
Great Plains Mfg., Inc.
Assembly Instructions
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Setup Adjustments
1. Storage Saddle. When folding the marker for the first time,
you may need to move the storage saddle into alignment
with the second section of the marker arm. Slowly fold the
marker and stop when the marker is just above the storage
saddle. Adjust the bracket in or out as needed.
2. Transport Carrier. After centering the storage saddle and
folding the marker, visually check the height of the transport
carrier. The second section of the marker should appear
parallel with the top of the drill box. If not, loosen the trans-
port carrier u-bolts and adjust the carrier up or down.
3. Marker Chain. There are two basic adjustments needed on
the marker chain, especially in new installations. They are
interrelated and should be done in the following order.
a. Lifting Slack. Start with the marker in the unfolded po-
sition. Back the adjustment bolt (Figure 2, page 2, 21)
down until the head extends as little as possible. Slowly
fold the marker, observing the motion of the disk. If the
marker disk slides across the ground more than about
one foot before the chain and linkage lifts it up, the chain
is too slack. Tighten the chain by moving the clevis one
or two links at the inboard end of the chain. Recheck by
repeating this process.
If the chain does not have enough slack when the mark-
er is in the unfolded field position, the chain will prevent
the end of the marker from dropping down to follow a de-
pression in the field. Correct this condition by moving
the utility clevis one or two links, giving the chain more
slack.
b. Folding Slack. Fold the marker. Extend the adjustment
bolt until the slack is out of the chain. Lock the bolt in
this position by tightening the nuts on either side of the
upright channel.
Bleeding Marker Hydraulics
To operate correctly, the marker hydraulics must be free of air. If
not properly bled, the markers will fold in jerky, uneven motions.
Follow these instructions to bleed the marker hydraulics.
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CAUTION!
Never allow anyone near the drill when cycling the markers!
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WARNING!
Escaping fluid under pressure can have sufficient pressure to
penetrate the skin causing serious injury. Avoid the hazard by
relieving pressure before disconnecting hydraulic lines. Use a
piece of paper or cardboard, NOT BODY PARTS, to check for
leaks. Wear protective gloves and safety glasses or goggles
when working with hydraulic systems. If an accident occurs, see
a doctor immediately. Any fluid injected into the skin must be
surgically removed within a few hours or gangrene will result.
1. Be sure tractor hydraulic reservoir is full.
2. With the drill unfolded and lowered, set the switch on the
control console to the left-marker position.
3. With the marker unfolded, crack the hose fitting at the base
end of the left-marker cylinder. With your tractor at an idle
speed, activate your hydraulic valve until oil seeps out
around the hose ends. Tighten the hose-end fittings.
4. Repeat step three with the hose-end fitting at the rod end of
the cylinder.
5. If dual markers are used, repeat steps three and four for the
right marker cylinder.
NOTE: For dual markers, both are controlled by the left-marker
switch.
6. Fold and unfold the marker(s) slowly to work all the air out of
your marker hydraulics.
IMPORTANT: JIC fittings do not require high torque. JIC
and O-Ring fittings do not require sealant. Always use liq-
uid pipe sealant when adding or replacing pipe thread fit-
tings. To avoid possible danger of cracking hydraulic
fittings from over tightening, do not use plastic sealant
tape.