GREAT PLAINS 606NT User manual

FIELDADJUSTMENTGUIDE
Document #DRUS500C-0003A
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Document # DRUS500C-0003A
Drills
Six Foot No-Till Drills
Proper servicing and adjustment is key to the long life of all farm equipment. With careful and systematic
inspection of equipment, costly maintenance, time and repair can be avoided. The following information
will assist with recommended servicing and adjustments:
48737
Models Affected:606NT, 3P606NT
Date: August 4, 2015
General Information

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Transporting The Drill:
When transporting the drill, the transport locks should always
be used. This will prevent damage to the drill and possible
personal injury should hydraulic failure occur.
1) To install the transport locks, fully raise the drill and place
the transport lock onto the rod of the cylinder and secure it in
place with a pin and clip.
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2) Always disengage the lockout hub before transporting the
drill.
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Hitching 606NT To The Tractor:
1) With the drill lowered and tongue jack in the parking posi-
tion, level the tongue, then back the tractor to the drill hitch
and adjust to match the draw bar height. Adjust the hitch
height as needed with the implement jack to match the draw
bar.
2) After hooking the drill to the tractor and attaching the
hydraulic hoses, raise the drill up to the maximum height and
hold the hydraulic lever for 30 seconds to re-phase the cylin-
ders. This procedure will remove any air in the system, allow-
ing the drill to raise and lower evenly. The re-phasing
procedure should be repeated several times a day to ensure
that the drill continues to lift evenly.
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Setting Tool Bar Height 606NT: The tool bar height is con-
trolled by a depth stop located on the left lift cylinder.
The suggested initial tool bar operating height is 24 3/4
inches (62.9cm) from the base of the opener tool bar to the
ground, when lowered in the field.
1) In the field, lower the drill to the desired tool bar height and
pull forward to put the openers in the ground.
2) Loosen the nut and bolt that secure the stop weldment to
the cylinder rod.
3) Slide the weldment up the rod until it comes in contact with
the valve actuator, and then slide the weldment an addition
1/8 inch. Tighten the nut and bolt.
4) Raise and lower the drill several times to ensure that the
depth stop is working and pull forward with the drill in the
ground. Check to ensure that the desired depth is achieved.
Re-adjust if necessary.
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Leveling The Drill 606NT:
1) The drill must be lowered until weight is taken off of the
hitch turnbuckle. Do not attempt to adjust the turnbuckle with
the drill risen.
2) Loosen the jam nuts on the hitch turnbuckle (1).
3) Shorten or lengthen the turnbuckle until the top of the drill
frame is parallel to the ground. Note: Be careful not to extend
the clevises beyond the turnbuckle.
4) Once the drill is level, re-tighten the jam nuts.
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Adjusting 3-Point Height 3P606NT:
Raising the gauge wheel spindle provides deeper coulter
depth while lowering the gauge wheel provides shallower
depth. Note: Do not lower the coulters to aid in penetrating
hard soil. Instead, increase coulter down-force or add optional
weight to the drill.
1) Determine the desired coulter depth. With new coulter
blades, the axle holes provide the following depths:
Hole No.
(from top)
Coulter Depth
Inches mm
1 3 1/2 in. 89 mm
2 2 7/8 in. 73 mm
3 2 3/8 in. 60 mm
4 1 7/8 in. 48 mm
5 1 3/8 in. 35 mm
6 7/8 in. 22 mm
7 3/8 in. 10mm
8 1/4 in. 6 mm
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23
45
67
8
2) Raise the drill until the spindle can be adjusted any distance.
3) Loosen the chain idlers.
4) Remove the wheel bolts and move the spindle to the desired
hole. Re-install the wheel bolts.
5) Re-engage the chain idlers and check the overall depth.
Individual Coulter Height Adjustment:
Individual coulter depth may be adjusted by raising and lower
the spring bar.
1) Determine the new desired coulter depth, and/or the differ-
ence between that and the current depth.
2) Raise the drill until the coulters are just touching the ground.
The press wheels are supporting some weight at this point.
3) Measure the current spring bar length, from the bottom of
the tool bar to the bottom of the spring bar. For reference, the
factory setting is roughly 12 1/2 inches (31.8 mm).

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Determine the new bar length required.
4) Loosen the clamp bolts (2) and use a mallet to adjust the
bar height. Once the desired height is achieved, re-tighten the
clamp bolts.
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Coulter Down-Force Adjustment:
Coulter springs are preset at the factory giving the coulters an
initial operation force of 400+ lbs. This setting is adequate for
most field conditions. Re-setting the coulter spring shorten
than 9 3/4 inches can cause premature failure of parts.
48646
Opener Down Pressure:
The “W” clips located on the opener spring rods should be in
the lowest hole. This is the correct location in all conditions.
The “W” clips can be raised one hole on openers behind wheel
tracks only if penetration is not adequate.
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T-Handle Adjustment:
The depth of each opener is controlled by the height of the
press wheel. Varying the height of the press wheel changes
the seeding depth of the opener. Moving the “T” handle to the
front of the opener shallows the depth; moving the “T” handle
towards the rear of the opener increases the depth. For a start-
ing point, place the “T” handle in the center.
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Drive Idler Adjustment:
Two idler sprockets are located inside the left hand gauge
wheel arm. They should be re-adjusted after the first 100
acres of use. From then on, re-adjust at the beginning of each
season.
1) Loosen the jam nut (3).
2) Move the front idler sprocket on top of the chain and tighten
the chain by screwing in the adjustment stud (4).
3) Re-tighten the jam nut to maintain idler position. Note: Do
not over-tighten the stud. Insufficient slack causes excessive
wear and premature chain failure.
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4
Seed Cup Adjustment:
Check all seed cups to ensure that they are clean and free of
obstructions. The seed rate handle should move freely and
not have excessive play in it.
1) To check seed cups for accuracy, loosen the seed adjust-
ment handle by unscrewing the wing nut located on the under-
side of the handle and sliding the seed box rate handle to 100.
2) Place a seed calibration too (817-459C) into the seed cup
from the top (use the 7/8” side)
3) Once the tool has been placed into the seed cup, slide the
seed adjustment handle until the feed wheel presses up
against the block tightly.
4) With the feed wheel pressed tightly against the calibration
tool, the seed cups are set at exactly 50%. The brass gauge
should read 50%. If the seed adjustment handle is not lined up
on 50%, loosen the two screws holding the gauge and adjust
the brass plate until it reads 50% then tighten the screws.
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Feed Cup Adjustment:
Each feed cup is equipped with a four-position adjustment
handle.
A) The highest position is for wheat and other small grains.
B) The second position is for soybeans and other large grains.
C) The third position is used if the seeds are cracking in the
second position.
D) The bottom position is for clean out and will drain all seed
Note: Do not open the seed cup handle to the bottom position
with seed in the box unless complete clean out is desired.
Changing this handle will change the seeding rate. When stor-
ing after drilling season, it is best to place the handle in the
bottom position to prevent damage from mice.
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A
B
C
D

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Select Drive Type:
The gearbox is designed to give a variety of drive speeds for
different types of seed and rates. It is a linear shaft pattern
design with constant mesh gearing and is totally sealed to
keep any dirt out. No lubrication is required unless service is
needed.
1) To set the gearbox, simply move the selector handle until
the desired drive type appears in the window on the handle.
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Main Seed Box Drive Type Ratios
Drive Type 2 is 2.06 Times Faster Than 1
Drive Type 3 is 3.08 Times Faster Than 1
Drive Type 4 is 5.03 Times Faster Than 1