GREAT PLAINS BD7600 Guide
FIELD ADJUSTMENT GUIDE
Document #DRUS400C-0012A
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Document # DRUS400C-0012A
Drill
BD7600 Box Drill
Models Affected: BD7600-26, BD7600HD-26, BD7600-30, BD7600HD-30, BD7600-40, BD7600HD-40
Proper servicing and adjustment is key to the long life of all farm equipment. With careful and sys-
tematic inspection of equipment, costly maintenance, time and repair can be avoided. The follow-
ing information will assist with recommended servicing and adjustments:
49627
Date: March 24, 2020
General Information
Document #DRUS400C-0012A 2 of 12
General Information:
1) Visually inspect the drill for any signs of loose hard-
ware or hydraulic fittings.
2) Inspect and lubricate all chains with chain lube.
4) Inspect all chains daily for proper adjustment:
5) Lubricate the clutch cams daily with grease along
with spraying the hex coupler with chain lube. Remove
all buildup of grease and residue on clutches once a
year.
6) Check the tire pressure on all tires, as incorrect tire
pressure will affect seeding rate and levelness of the
drill.
Model Tire Size Pressure
BD7600(HD)-26 Transport 320/70R15
9.5LX15-8 PLY
52 PSI
44 PSI
BD7600(HD)-30 Transport 305/70R16.5
Gauge Wheel 10.0x15
73 PSI
73 PSI
BD7600(HD)-40 Transport 380/55R16.5
Gauge Wheel 340/6R16.5
73 PSI
73 PSI
Hitch Height Adjustment: Adjust the drill hitch to
match the tractor draw bar height.
1) With the drill lowered to field position, extend the
jack so the lowest hitch hole is 18 inches above ground
level (A).
2) Install the drill hitch onto the tongue to match the
tractor draw bar height. The hitch can be turned over
for six different hitch heights. Always have two bolts in
two holes of both the tongue and hitch.
Hydraulic Hookup: Refer to the table to the right for
proper hydraulic hose identification: Color Hydraulic Function
Red Opener Lift Cylinders
Blue Transport Lift Cylinders/Jack
Gray Fold Cylinders
Green Marker Cylinders (Optional)
Yellow Hydraulic Drive
(B) - 32.0 in (81.3 cm)
(C) - 29.0 in (73.7 cm)
(D) - 26.0 in (66.0 cm)
(E) - 21.5 in (24.6 cm)
(F) - 18.5 in (47.0 cm)
(G) - 15.5 in (39.4 cm)
Document #DRUS400C-0012A
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Wing Box Alignment:
1) Place blocks ahead of the wing gauge wheels.
2) Pull forward against the blocks to rock the wing
frames back.
3) Pull forward until the stop bolts (1) are firmly
against the folding arms.
4) Run a string line across the back of the drill toward
the outer ends of the wings. Make sure the string is
parallel to the center box and both measurements (2)
are equal.
5) For proper alignment, the outside ends (3) of the
wing boxes should be about 1 to 1-1/4 inch ahead of
the inside ends (4).
6) To adjust the box alignment, shorten or lengthen
the stop bolts to change the contact point with the
tool bars. Loosen the jam nut and adjust the stop
bolts in or out until the outside ends of the boxes are
1 to 1-1/4 inch ahead of the inside ends.
7) Tighten the jam nut.
49629
*BD7600(HD)-26*
*BD7600(HD)-30 & BD7600(HD)-40*
Document #DRUS400C-0012A 4 of 12
How To Set Ground Drive High & Low Range
Sprockets:
Note: Set each sprocket range according to the seed
rate manual.
1) Push down on the idler handle.
2) Remove the chain.
3) Route the chain, on the correct range, around the
idlers and sprockets as shown to the right.
4) Set each drill box with the same range.
How To Set Hydraulic Drive High & Low Range
Sprockets:
Note: Set each sprocket range according to the seed
rate manual.
1) Push down on the idler handle.
2) Remove the chain.
3) Route the chain, on the correct range, around the
idlers and sprockets as shown to the right.
4) Set each drill box with the same range.
49633
How To Lock Up & Unlock Openers:
Note: Openers must be locked up for transport or for
working under the drill. Opener handles can be moved
with openers up or down, but lock indicators only
engage and disengage after the openers are raised
completely. There are two lock handles on each drill
section, six handles total.
To Lock Up Openers:
1) Position the lock handles (1) in ROAD position (2).
2) Completely raise the openers until the spring
loaded locks, latch into place.
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49634
To Unlock Openers:
1) Position the opener lock handles (1) in FIELD posi-
tion (3).
2) Raise the openers completely to release the spring
loaded locks.
3) Lower the openers.
49635
How To Set Opener Hydraulic Down Pressure:
Note: The following information assumes the tractor is
either a closed center and/or load sensing system.
Open center tractors can not be ran in continuous
flow (see Open Center Hydraulic Instructions on pg.
6).
1) Turn the locking disk (1) counterclockwise to
enable adjustment.
2) Initially close the bypass valve for no oil flow by
turning the adjustment knob (2) completely clockwise.
Note: Turn the adjustment knob counterclockwise to
increase flow and clockwise to decrease flow. Turn it
fully clockwise to stop all bypass flow.
3) With the tractor at half throttle, adjust the flow-con-
trol valve on the tractor so the openers raise and
lower at a reasonable speed. Keep the tractor at half
throttle for the remaining steps. Note: The faster the
opener raise and lower, the greater potential for oil
heating, premature wear, or tractor damage.
4) Engage the tractor hydraulics and lower the open-
ers. Lock the hydraulic lever on the tractor for continu-
ous operation.
5) Release the locking disks (3) on the down-pressure
valves.
6) Turn the adjustment knobs (4) on the down-pres-
sure valves so the gauges are at 1800 psi (2100 psi
for heavy duty drills).
7) While watching the gauges on the drill, slowly
adjust the knob on the bypass valve counterclock-
wise. Adjust the bypass valve just until the needles on
the gauges begin to move down. Note: At the same
time, for proper opener operation, the bypass valve
must be set at least 300 psi above the opener down
pressure setting with the tractor at half throttle.
8) Lock the bypass valve at this setting.
9) Readjust the down-pressure valves on the drill to
the desired opener down pressure.
Document #DRUS400C-0012A 6 of 12
Opener Adjustments:
Openers provide the best results when the opener
body is parallel with the ground.
1) If the openers are too high in the front, increase
hydraulic pressure, and/or lengthen the opener
springs. Check the opener frame pivot in use at high
pressures.
49636
Opener Center Hydraulic (Non-Active Hydraulic
System) Instructions:
1) Lower the opener frames and lock the tractor
hydraulic lever forward temporarily while adjusting
opener down-pressure.
2) Release the lock disk (1). Set the down-pressure
with the adjustment knob (2) while watching the pres-
sure gauge until the gauge shows the desired pres-
sure. Turn clockwise to increase pressure and
counterclockwise to decrease pressure.
3) When the pressure is set, lock the knob with the
locking disk.
4) After opener down-pressure is set, return the trac-
tor hydraulic lever to neutral. This locks in the
selected pressure and opener frames remain fixed in
this position.
Note: Open center tractors and tractors with fixed-dis-
placement pumps are not designed to provide a con-
tinuous supply of pressurized oil to remote valve.
Locking the hydraulic lever forward on these tractors
can cause overheating of hydraulic oil and tractor
damage.
During Field Operation:
1) Each time the openers are lowered, hold the tractor
remote hydraulic lever forward for a few seconds to
recharge the circuit, then return it to neutral position.
The tractor and drill should be on level ground when
returning lever to neutral.
2) When approaching rough terrain where you need
active hydraulics to maintain even opener penetra-
tion, move the tractor hydraulic lever forward momen-
tarily. When you return to level ground move the lever
to neutral. Note: Do not activate the tractor hydraulic
lever for more than 20 seconds at any given time.
49637
49638
2) If the openers are too low in the front or are bulldoz-
ing, as shown to the right, decrease the hydraulic
pressure and/or shorten the opener springs.
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49639
Opener Spring Down Pressure Adjustment:
For planting in tire tracks and for no-till conditions,
increase spring pressure on individual openers or on
all openers. Adjust the spring together with the opener
frame down pressure and opener height to keep the
top of the opener parallel to the ground.
1) Loosen the jam nut (1) at the lower end of the
opener spring.
2) Tighten the flange nut (2) against the spring ten-
sion. Each 1/4 inch adjustment adds about 17 pounds
of force at the opener disk.
3) Adjust adjusting, lock the flange nut in place with
the jam nut.
The reference points for spring length (3) are the cen-
ter of the upper/front clevis pin (4) and the top edge of
the lower/rear spring stop (5)
The factor preset length is recommended for conven-
tional till and min till conditions. Shorten the length for
no-till conditions.
00 Series 00HD Series
Factory Length 13-5/16 in 12-9/16 in
Minimum Length 12-5/16 in 12-1/4 in
Opener Depth Adjustment:
Set opener seeding depth (1) by adjusting the press
wheel height.
1) Raise the openers slightly.
2) Lift and slide the T-handle (2) on each opener.
Adjust all press wheels to the same height. Each
adjustment of the T-handle changes the seeding
depth by approximately 1/4 inch.
Move the T-handle forward (A) for more shallow seed-
ing.
Move the T-handle backwards (B) for deeper seeding.
Note: If the press wheels are lifting off the ground,
increase hydraulic down pressure. If press wheels are
digging into the ground, decrease hydraulic down
pressure.
Opener Disk Blade Adjustments:
Opener disk angle and stagger is not adjustable, but
disk-to-disk spacing is, and may need to attention as
disk wear.
With ideal spacing the blades are in contact for about
1 inch. Insert two pieces of paper between the blades.
The gap (A) must be 1/2 to 1 1/2 inch.
If the gap is significantly larger or smaller, or if there is
no contact at all, adjust by moving one or more spacer
washers.
Document #DRUS400C-0012A 8 of 12
49642
How To Adjust Blade Spacing (Contact):
1) Raise and lock up the drill with the transport lock.
2) Remove the bolt (1) securing the opener disk on
one side. Note: The bolt on the left side is a left-
handed bolt and the bolt on the right side is a stan-
dard right-hand threaded bolt.
3) Carefully remove the blade (2). Note how many
spacers (3) are outside the flange dust cover (4) and
inside the disk. Do not lose the hub components and
spacers.
4) To reduce the spacing between the disks, move
one spacer from the inside to the outside of the flange
dust cover. To increase the spacing, move one spacer
from the outside to the inside of the flange dust cover.
5) Reassemble and check disk contact.
Knock Down Tine Pitch Adjustment:
To avoid rapid wear, do not allow the knock down bars
or tines to contact the ground during operation.
1) Loosen the nuts (2)
2) Adjust the rear elevation of each knock down
assembly so it is as close as possible to level with the
opener frame.
3) After both sides are adjusted, tighten the nuts to
torque.
49642
Knock Down Bar/Disk Gap Adjustment:
The gap should be about 0.01 inch.
1) Loosen the bolts (1).
2) Adjust the position of the tine (2) so the knock-
down bar (3) almost contacts the opener disk for the
full length of the bar.
3) Tighten the nuts to torque.
4) Rotate the opener disk a full turn or more to make
sure that contact is avoided.
Note: Adjust the scraper on the knock down tine so
that the gap is about 0.01 inch.
49644
Document #DRUS400C-0012A
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49633
How To Fold Drill:
Applies to BD7600(HD)-30 & BD7600(HD)-40
1) Par the tractor and drill on level ground with
enough clearance to fold the drill. Put the tractor in
park.
2) Fold markers, if installed.
3) Position all six opener locks handles (1) in ROAD
position (2) and completely raise the openers. Note:
The opener lock handles are spring loaded and can
be moved to ROAD position with openers up or down,
but the locks only engage when the openers are com-
pletely raised.
4) Make sure the transport lift cylinders and tongue
cylinder are completely retracted (drill is lowered,
transport hook is lowered).
5) Slowly retract the fold cylinders. Completely fold
wing frames until both wing gauge wheels contact the
tongue tube.
How To Raise the Drill For Transport:
1) Extend the transport lift cylinders.
2) Leave the circuit extended until the mainframe lift is
complete, the transport hooks (1) have engaged, the
wing ends are lifted off the ground, and the tongue cyl-
inder (2) is fully extended.
49645
3) Position the transport lift handle (1) down in ROAD
position and lock the transport lock (2) in the latch (3).
The drill is now ready for transport.
49646
Document #DRUS400C-0012A 10 of 12
How To Lower Drill For Unfolding:
Note The drill must be lowered before unfolding.
1) Park the tractor and drill on level ground and put
the tractor in park. Make sure there is enough clear-
ance to unfold the drill.
2) Confirm that the selector valve is set for transport.
3) Slowly extend the lift cylinders. Set the hydraulic
lever to off. Move the center transport lift handle up to
FIELD position to release the transport lock.
4) Slowly lower the drill. Keep the hydraulic engaged
until the tongue cylinder and two lift cylinders are
completely retracted. Set the hydraulic circuit to neu-
tral.
How To Unfold The Drill Once Lowered:
1) Verify that the opener frames are still raised and
locked up (handles in ROAD position).
2) Slowly unfold the wing frames by completely
extending the fold cylinders.
3) If operating in the field, place all six opener lock
handles in FIELD position.
4) Completely raise the openers to allow the opener
locks to disengage.
How To Fold Drill:
The following applies to BD7600(HD)-26
Transport lift is on a dedicated hydraulic circuit, and is
used before folding. It raises and lowers inde-
pendently of the opener frames. The transport lift cir-
cuit also includes two cylinders on the wing arms
which lift the wings when folding.
1) Park the tractor and drill on level ground with
enough clearance to fold the drill. Put the tractor in
park.
2) Fold markers if installed. Return selector valve han-
dle to FOLD position.
3) Position all opener lock handles (1) in ROAD posi-
tion (2) and completely raise openers.Note: The
opener lock handles are spring loaded and can be
moved to ROAD position with openers up or down, but
the locks only engage when the openers are com-
pletely raised.
4) Extend the transport lift cylinders.
49633
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