Great Plains 3N-3010P Assembly Instructions - Manual (Page 7)

7 5/5/06 3N-3010P, No-Till Flat Fold Marker Option 113-739M
Great Plains Mfg., Inc.
Assembly Instructions
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Setup Adjustments
1. 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 par-
allel with the top of the drill box. If not, loosen the transport
carrier u-bolts and adjust the carrier up or down.
2. Marker Chain. There are two basic adjustments needed on
the marker chain, especially in new installations. They are in-
terrelated 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
!
CAUTION!
Never allow anyone near the drill when cycling the markers!
!
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.
.
Bleeding Marker Hydraulics cont.
1. Check that tractor hydraulic reservoir is full.
2. With both markers lowered into field position, loosen
hydraulic-hose fittings at rod and base ends of marker
cylinders. If applicable, loosen fittings on back side of
sequence valve.
IMPORTANT: Never bleed an O-ring fitting. Instead,
bleed a nearby pipe or JIC fitting.
3. With tractor idling, activate tractor hydraulic valve until
oil seeps out around a loosened fitting. Tighten that fit-
ting.
IMPORTANT: JIC fittings do not require high torque.
JIC and O-ring fittings do not require sealant. Always
use liquid pipe sealant when adding or replacing pipe-
thread fittings. To avoid cracking hydraulic fittings from
over tightening, do not use plastic sealant tape.
4. Reactivate tractor hydraulic valve until oil seeps out
around another loosened fitting. Tighten that fitting.
Repeat process until all loosened fitting have been
bled and tightened.
5. Adjust marker folding to a safe speed. Refer to "Mark-
er Adjustments" in the operator’s manual.