Great Plains CP1000 User Manual
Operator’s/Parts Manual
CPH and CP1000
Coulter Command System
Manufacturing, Inc.
P.O. Box 5060 ● Salina, Kansas 67402-5060
Read the operator’s manual entirely. When you see this symbol, the subsequent in-
!
structions and warnings are serious -follow without exception. Your life and thelivesof
others depend on it!
© Copyright 1999 Printed
2/30/2002
12611
Cover illustration may show optional equipment not supplied with standard unit.
148-258M-B
Table of Contents
Table of Contents
Great Plains Mfg., Inc.
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
Important Safety Information . . . . . . . . . . . . . . . . . 1
Safety Rules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Product Overview. . . . . . . . . . . . . . . . . . . . . . . . . 2
Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . 2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Important Notice . . . . . . . . . . . . . . . . . . . . . . 2
Pre-Assembly Checklist. . . . . . . . . . . . . . . . . . . . 3
Coulter Command Assembly . . . . . . . . . . . . . . . . 3
Depth Sensing Wheel . . . . . . . . . . . . . . . . . . 3
Section 1 Assembly Instructions & Set-Up . . . . . . 3
Lift Switch Assembly . . . . . . . . . . . . . . . . . . . 4
Wiring Harness . . . . . . . . . . . . . . . . . . . . . . . 6
Tongue Cylinder. . . . . . . . . . . . . . . . . . . . . . . 7
Hydraulic Control Valve . . . . . . . . . . . . . . . . . 7
Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Coulter Command Assembly Adjustments. . . . . . 9
Section 2 Operating Instructions . . . . . . . . . . . . . 10
Load Sensing Hydraulics . . . . . . . . . . . . . . . . . . 10
Hydraulic Hook-Up & Function. . . . . . . . . . . . . . 10
Closed-center hydraulic systems . . . . . . . . 10
Open center hydraulic systems. . . . . . . . . . 11
Operation of Electronic Controls . . . . . . . . . . . . 12
Field Adjustments . . . . . . . . . . . . . . . . . . . . . . . 12
Lift Switch. . . . . . . . . . . . . . . . . . . . . . . . . . .12
Speed Sensor. . . . . . . . . . . . . . . . . . . . . . . .13
Hydraulic Valve. . . . . . . . . . . . . . . . . . . . . . .13
Transport Cylinder Depth Channels . . . . . . . 13
Section 3 Troubleshooting . . . . . . . . . . . . . . . . . . . 14
System Schematics . . . . . . . . . . . . . . . . . . . . . .17
Hydraulic Schematic. . . . . . . . . . . . . . . . . . .17
Electrical Schematic. . . . . . . . . . . . . . . . . . .18
Section 4 Maintenance and Lubrication . . . . . . . .19
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Section 5 Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Coulter Depth Control Hydraulics. . . . . . . . . . . .20
Coulter Command Electronics . . . . . . . . . . . . . .22
Coulter Command Gauge Wheel Assembly. . . .24
Top Link Assembly . . . . . . . . . . . . . . . . . . . . . . .26
Coulter Command Switch Mount . . . . . . . . . . . .28
Lift Circuit Manifold (810-262C) . . . . . . . . . . . . .30
Coulter Depth Control Valve (810-214C) . . . . . .32
O-Ring Identification Chart . . . . . . . . . . . . . . . . . 34
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Torque Values Chart for Common Bolt Sizes . . .36
Tire Inflation Chart . . . . . . . . . . . . . . . . . . . . . . .36
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
CPH and CP1000 Coulter Command System 148-258M-B 9/21/05
0
Great Plains Mfg., Inc.
Important Safety Information
Important Safety Information
Foryour safety and to help in developinga better understanding of your equipment we highly recommend that
you read the operator sections of this manual. Reading
these sections not only provides valuable training but
also familiarizes you with helpful information and its location. The parts sections are for reference only and
don’trequire covertocoverreading.Afterreviewingyour
manual store it in a dry,easily accessible location for future reference.
!
The SAFETY ALERT SYMBOL indicates that there is a
potential hazard to personal safety involved and extra
safety precautions must be taken. When you see this
symbol, be alertand carefully read themessage that follows it. In addition to design and configuration of
equipment; hazard control and accident prevention are
dependentupon the awareness,concern,prudence and
proper training of personnel involved in the operation,
transport, maintenance and storage of equipment.
Watchforthe followingsafety notations through-out
your Operators Manual:
!
DANGER!
Indicates an imminently hazardous situation which, if
not avoided, will result in death or serious injury. This
signal word is limited to the most extreme situations.
!
WARNING!
Indicates a potentially hazardoussituation which, if not
avoided, could result in death or serious injury.
1. Escaping fluid under pressure can have sufficient force
to penetrate the skin. Check all hydraulic lines and hoses
before applying pressure. Fluid escaping from a very
small hole can be almost invisible. Use paper or cardboard, not body parts, to check for suspected leaks. If injured, seek medical assistance from a doctor that is
familiar with this type of injury. Foreign fluids in the tissue must be surgically removed within a few hours or
gangrene will result.
2. Make sure all people, animals, and objects are clear of
the coulter tool bar before switching the tongue hydrau-
lics switch to the "auto" mode.
3. Do not crawl under a raised machine without the transport lock blocks securely in place. Sudden hydraulic activation or failure could cause serious injury or death.
4. Never permit anyone to ride on hitch or planting equipment when moving.
5. Never permit anyone to ride tractor when hitch is being
moved.
6. Do not pull the Center Pivot Hitch faster than 20 miles
per hour.
7. Always set the hitch in field position before assembling,
lubrication, making adjustments, or servicing. Periodically check bolts for tightness and lubricate all fittings.
8. Shut off hydraulics valves and shut down tractor before
preforming any maintenance to the hitch or crawling under it.
9. Do not allow anyone to operate the machine who has not
been properly trained in its safe operation.
10. Do not operate equipment while under the influence of
drugs or alcohol.
11. Keep hands, feet, hair, and clothing away from all moving parts.
12. Clear the area of bystanders, especially small children
and animals before moving and operating equipment.
Review the safety instructions annually.
!
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury. It may also
be used to alert against unsafe practices.
Safety Rules
Most accidents are the result of negligence and carelessness, usually caused by failure of the operator to
follow simple but necessary safety precautions. The followingsafetyprecautions are suggested to help prevent
such accidents. The safeoperation of any machinery is
a big concern to consumers and manufacturers.Your
Coulter Command System has been designed with
many built-in safety features. However, no one should
operate this product beforecarefully reading this Operator’s Manual.
9/21/05
CAUTION!
CPH and CP1000 Coulter Command System 148-258M-B
1
Introduction
Introduction
Great Plains Mfg., Inc.
This manual applies to the following:
148-260A CPH Coulter Command
148-272A CPH Coulter Command Update
148-260A CP1000 Coulter Command
This manual has been prepared to instruct you in the
safe and efficient operation of your Coulter Command
System. Read and follow all instructions and safetyprecautions carefully.
Theparts on yourCoulter Command havebeen specially designed and should only be replaced with genuine
GreatPlains parts. Therefore, should your Coulter Commandrequirereplacement parts go toyourGreat Plains
Dealer.
Product Overview
The Coulter Command couples a microprocessor with
electro-hydraulics to provide a state-of-the-art system
formaintaining coulter depth regardless of the terrain or
soil type. It also provides coulter depth adjustment
"FromThe TractorCab". The Coulter Commandsystem
contains a depth sensing wheel, an electronic control
box, a speed sensor, a depth sensor box, a lift control
switch,a wiringharness, a top link, and a hydraulic control valve. It also uses the tongue cylinder from your
Center Pivot Hitch (CPH) or CP1000.
Definitions
The right hand and left hand as used throughout this
manual is determined by facing in the direction the machine will travel when in use unless otherwise stated.
NOTE: Indicates a special point of information
which requires your attention.
Important Notice
Great Plains Manufacturing, Inc. provides this publication “as is” without warranty of any kind, either
expressed or implied, while every precaution has been
taken in the preparation of this manual, Great Plains
Manufacturing,Inc. assumesno responsibility forerrors
oromissions.Neither is any liability assumed for damages resulting from the use of the information contained
herein. Great Plains Manufacturing, Inc. reserves the
righttoreviseand improveits products asitseesfit.This
publicationdescribes the state ofthisproductat the time
of its publication, and may not reflect the product at all
times in the future.
Printed in the United States of America.
Foryour convenience, record your Serial Number, Mod-
el Number and the Date Purchased in the space
provided below. Have this information before you when
calling a Great Plains Authorized Dealer.
Using This Manual
Foryour safety and to help in developinga better understanding of your equipment we highly recommend that
you read the operator sections of this manual. Reading
these sections not only provides valuable training but
also familiarizes you with helpful information and its location. The parts sections are for reference only and
don’t require cover to cover reading. After reviewing
your manual store it in a dry, easily accessible location
for future reference.
CPH and CP1000 Coulter Command System 148-258M-B 9/21/05
2
Great Plains Mfg., Inc.
Section 1 Assembly Instructions & Set-Up
Section 1 Assembly Instructions & Set-Up
Pre-Assembly Checklist
Check
All major components
Fasteners that were shipped with the Coulter Command
System.
NOTE: Some of the hardware from the factory has been
installed in the location where it will be used.
Have a minimum of 2 people at hand while assembling the
Coulter Command.
Have a fork lift or loader along with chains and safety
stands ready for the assembly task.
If you are unsure where a fastener is used, use the parts
section of this manual to identify it. Be sure the part gets
used in the correct location.
Coulter Command Assembly
Depth Sensing Wheel
Refer to Figure1
Install the coulter depth sensingwheel assembly (#1) to
the front 4" x 4" coulter tool bar tube with the 5/8" X 6"
long U-bolt (#2), lock washers (#3), and nuts (#4). The
centerofthecoulter depth sensing wheel mount bracket
should be positioned 2 1/4" to the right of the center of
the hitch center beam. This dimension leaves about 2 3/
4"clearance between the inside edge of thedepth sensing tire and the edge of the 8" X 8" hitch center beam.
9/21/05
Figure 1
Coulter Command Assembly
CPH and CP1000 Coulter Command System 148-258M-B
12613
3
Section 1 Assembly Instructions & Set-Up
Great Plains Mfg., Inc.
Lift Switch Assembly
Refer to Figure2
1. Remove the 1/2" x 5 1/2" long bolts (#28) nuts, flat
washers, and springs from the right hand transport
cylinderbraceand insert theswitchmount (#4),and
1/2" lock washer (#15), under the head of the bolt.
Position the mount and bolts back onto the brace
and reassemble the nuts, flat washers and springs
onto the brace. It is important that these support
braces are properly assembled to supportthe transport cylinders without binding or placing undo side
loads on the cylinders. Whenever the 5 1/2" support
bolts are removed or the inner axle slide blocks becomeworn, assemble or adjust the cylindersupport
braces as follows.
a. Assemble the 1/2" x 5 1/2" long full thread bolt
(#28), 1/2" lock washer (#15), and the switch
mount (#4) to the cylinder support brace (#22)
bolted to the rod end cylinder casting.
b. Screw on three 1/2" jam nuts (#23), and one
1/2" washer (#24) as shownin . Tighten thefirst
jam nut against the cylinder support (#22) and
run the other two jam nuts on, nearly all the way.
c. With the cylinder properly installed, the support
bolts (#28) should extend through the bracket
(#27)on the outer slide tube when thebaseend
and rod end pins are in place.
d. Screw the outer 1/2" jam nut out until the 1/2"
washer (#24) just touches the bracket on the
outer slide tube. Do not put pressure on the cylinder by tightening the 1/2" jam nut. Once the
washer touches the bracket,lock the outer 1/2"
jam nut in place with the center 1/2" jam nut.
e. Install spring (#25) and 1/2" nylock nut (#26).
Tighten nut to compress spring to a 1 1/4"
length.
Use this procedure foreach of the two supportbolts
on the transport cylinders.
2. Fastenthe cylinder rod clamps (#3 & 6) to the clevis
end of the cylinder rod with two 5/16" x 1 1/4" bolts
(#16),lockwashers(#18)andnuts(#19). The offset
of the clamp must be toward the right hand side of
the hitch as shown.
3. Withthe ramp of thepushrod(#5),facing towardthe
center of the hitch, insert it between the ears of the
cylinder rod clamp (#6), and bolt it in place with a
5/16"x 1 1/4" bolt (#16),two5/16" USS flat washers
(#17), and nylock nut (#20). It is recommended to
bolt it through the lower-most hole in the push rod.
Only run the nylock nut far enough onto the bolt to
makefull engagement of thenylon collar on the nut.
Do not cinch it down. Thebolt and push rod mustbe
free to move in the slot of the clamp.
4. Slide the switch guide block (#2), over the push rod
and fasten it to the mount with two 1/4" x 2" long
bolts (#12), flat washer (#21), lock washers (#13),
and nuts (#14).
5. Bolt the plunger activated switch (#7), to the mount
with the spacer plate (#1), under it with two #10" x
1 1/2" long round head machine screws (#8), flat
washers (#9), lock washers (#10), and nuts (#11).
Slide the plunger switch in the slots of the mount so
the plunger moves "in" about 1/8" when the cam on
the push rod activates it and tighten the screws.Do
not"bottom out" the plunger on theswitchor itcould
be damaged.
Wiring Harness
CPH and CP1000 Coulter Command System 148-258M-B 9/21/05
4
Great Plains Mfg., Inc.
Section 1 Assembly Instructions & Set-Up
9/21/05
12612
Figure 2
Switch Assembly
CPH and CP1000 Coulter Command System 148-258M-B
5
Section 1 Assembly Instructions & Set-Up
Great Plains Mfg., Inc.
Refer to Figure3
1. Route the 156" long two wire lead of the wiring harness(#1) through the 8" x 8" hitch tube andtothelift
switch(#2) at the rear of the machine. Plug in the lift
switch and support the cable with the cable tie
mounts (#3) and releasable cable ties (#4) or strap
the cable to the hydraulic hoses.
2. Plugthe 4-Pin connector ofthewiringharnesstothe
sensor boxon the depth sensing wheel and support
the cable with the cable tie mounts (#3) and releasable cable ties (#4).
3. Route the 9-Pin connector through the spring hose
loop and to the tractor hitch. This will plug into the 9Pin Female lead from the control box extension cable (#5).
4. The other three short leads on the wiring harness
will plug into the leads from the solenoids on the hydraulic control valves after they are installed.
12617
Figure 3
Wiring Harness Assembly
CPH and CP1000 Coulter Command System 148-258M-B 9/21/05
6
Great Plains Mfg., Inc.
Section 1 Assembly Instructions & Set-Up
Tongue Cylinder
Refer to Figure4
1. Remove the stroke pointer gauge (#1) which was
bolted to the rod end of the tongue cylinder and retorque the cylinder tie rod bolts to 95 FT-LBS. Remove the stroke pointer (#2) at the cylinder rod
clevis and discard it.
Refer to Figure5
2. Turn the tongue cylinder with the rod end pointing
forwardand down,andwith the portsturned up. Use
the clevis pin (#17), flat washer (#18), and 1/4" cotterpin(#13) to replace the stroke pointer pin at what
is now the base end of the cylinder. Use the existing
clevis pin (#15) and hair pin cotter (#16) to connect
the rod end to the tongue.
3. Removethe elbow fitting (#3) at the base end of the
tongue cylinder and screw the 1/16" orifice plate
(#9)intothebaseendport. Screw the orifice plate in
far enough so it doesn't interfere with the elbow fitting and replace the fitting.
IMPORTANT: Failureto install the orifice platewill not allow coulter command to operate correctly.
12672
Figure 4
Tongue Cylinder Disassembly
Hydraulic Control Valve
Refer to Figure5
1. Boltthe 3 1/2" x 3 1/2" x 5" hydraulicvalveblock(#2)
to the top of the valve mount bracket (#13) with the
5/16" x 4" long bolts (#1), lock washers (#11), and
hex nuts (#10). Position the valve block so the solenoids set above the middle of the top surface of the
valve mount.
2. Boltthe 3" x 3 1/4" x 8" hydraulic valveblock (#25) to
the side of the valve mount bracket (#13) with the
5/16" x 3 1/2" long bolts (#24), lock washers (#11),
and hex nuts (#10). Positionthe valveblock so the
four ports point awayfrom the valvemount and the
solenoid points up.
3. Bolt the valve mount assembly to the hitch with the
1/2" x 5 1/2" long bolt (#12), lock washer (#6), and
hex nut (#5). Assemble the bolt through the pivot
tube for the levellink located just behind the tongue
cylinder. Position the valve mount so the dual solenoids face toward the rear of the machine.
4. Assemblethe 3/4" JIC elbows (#3) to the valveports
marked"P"and "T" of the top valve block.Assemble
the straight 3/4" adaptors (#7) to the valve ports
marked"A"and"B"of the top valveblock. Assemble
the straight 3/4" adaptors (#7) to the valve ports
marked "V1" and V2" of the lower valve block. Assemble the 1/2" female pipe swivel elbows (#20) to
the valveports marked "C3" and "C4" of the lower
valveblock. Assemble the 9/16" elbows (#21) to the
valveports marked "C1" and "C2" of the lowerblock.
Assemble the remaining two 9/16" elbows (#21) to
the ports on the side of the 1 1/2" x 4" gauge wheel
lift cylinder (#23).
5. Remove the 122" hoses (#4) from the tongue cylinder and assemble them to the elbows (#3) at ports
"P" and "T" on the top hydraulic valve. Connect the
20" long hose (#8) between the port "B" of the top
valveand the tongue cylinder base end fitting. Connect the 30" long hose (#14)betweenport "A"of the
top valve and the tongue cylinder rod end fitting. Assemble the other two 122" hoses (#4), from the
Coulter Command kit, to the adaptors (#7) at ports
"V1" and "V2" on the lower hydraulic valve.Remove
the quick couplers from the ends of the long transport lift hoses (#26) and assemble them to the ends
of the 122" hoses (#4) from ports "V1" and "V2". Assemble the long transport lift hoses (#26) to the elbows (#20) at ports"C3" and "C4" on the lower
hydraulicvalve.The hose coming from the base end
of the transport lift cylinders connects to the port
marked "C3" and the hose coming form the rod end
of the transport lift cylinders connects to the port
marked "C4". Slide the excess hose from the long
transport lift hoses into the 8" x 8" hitch main tube.
Connect one of the 36" long 1/4" hoses (#22) between the port "C1" of the lower valveblock and the
9/21/05
CPH and CP1000 Coulter Command System 148-258M-B
7
Section 1 Assembly Instructions & Set-Up
1 1/2" x 4" gauge wheel lift cylinder base and elbow
fitting (#21). Connect the other 36" long 1/4" hose
(#22) between the port"C2" of the lower valve block
and the 1 1/2" x 4" gauge wheel lift cylinder rod end
elbow fitting (#21).
6. Route the three 16" wiring harness leads with the
weather-proof connectors, under the valve mount
and connect each lead to its solenoid. The lead labeled "A" should be plugged into the solenoid
marked"A",Theleadlabeled"B"shouldbeplugged
into the solenoid marked "B," and the lead labeled
"S1" should be plugged into the solenoid marked
"S1."
Great Plains Mfg., Inc.
13482
Figure 5
Hydraulic Control Valve Assembly
CPH and CP1000 Coulter Command System 148-258M-B 9/21/05
8
Great Plains Mfg., Inc.
Section 1 Assembly Instructions & Set-Up
Control Box
Refer to Figure6
1. Mountthe control boxata convenientlocation inthe
tractor cab. Connect the 12’ extension cable to the
9-pin connector on the back of the control box and
routethecable backtowardthe tractor drawbararea
making sure it will not get kinked or pinched.
2. Connect the power cord to a good uninterrupted 12
voltpower source on the tractor.Connecting directly
to the battery is recommended. Plug the cord into
the lead with the 2-Pin connector on the back of the
control box. The polarity of the power supply is very
important to prevent circuit damage. The white wire
of the power cord must be connected to the "+" positive battery terminal and the black wire to the "-"
negative battery terminal.
With the depth sensing wheel in the max down position, the voltage potential between the lead containing the WHITE WIRE and the ground lead (BLACK
WIRE) in the gauge wheel sensor box (#1) should
be 5 volts DC plus or minus 1/4 volt. To adjust the
gauge wheel sensor box linkage, loosen the 3/8"
hexflange nut (#2) on the sensor spindle and rotate
the circular disk (#3) until the voltage potential betweentheleadcontainingthe WHITE WIRE and the
ground lead (BLACK WIRE) (#1) is 5 volts DC plus
or minus 1/4 volt. Rotating the circular disk counterclockwise increases voltage potential, and rotating
the circular disk clockwise decreases the voltage
potential. Once the correct voltage potential is
achieved,tighten the 3/8" nut. Be careful not to rotate the circular disk as you tighten the nut. Replace
the sensor box cover.
12575
Figure 6
Coulter Command Control Box
Coulter Command
Assembly Adjustments
Refer to Figure7
Coulter command depth sensing wheel assemblies
whicharepre-assembledat the factory are pre-adjusted
and should not require further adjustment. If the sensor
boxat the depth sensing wheel has been field installed,
or if its linkage gets out of adjustment, it must be adjusted using one of the following two procedures:
1. The best and most accurate means of adjusting the
linkage inside the sensor box makes use of a voltmeterwhich reads 0-12 voltsDC.TheControlBoxin
the tractor must be properly connected to a power
source and the POWER switch must be ON. The
TONGUE HYDRAULICS switch should be in the
MANUAL mode. The wiring harness must be connected to the control box and the sensor box. The
depth sensing wheel should be off the ground with
the arm rotated down as far as its spring-loaded
down-pressure link will allow. Remove the cover
from the sensor box and inspect theinternal linkage
for proper assembly.
12619
Figure 7
Sensor Box Adjustments
2. The second means of adjusting the linkage inside
the sensor box involvesmeasuring from the inside
edge of the boxto the left pivot of the formed roundbar link. The depth sensing wheel should be off the
ground and rotated downas far as its spring-loaded
down-pressure link will allow. Remove the cover
from the sensor box and inspect theinternal linkage
for proper assembly.
With the depth sensing wheel in the max down position, the pivot between the vertical flat-bar link and
the formed round-bar link should be 15/16" from the
front inside edge of the sensor box.
With the sensor box linkage properly assembled,
loosen the 3/8" hex flange nut on the sensor spindle
androtatethecirculardiskuntilthepivotbetween the
vertical flat-bar link and the formed round-bar link is
15/16" + or - 1/16" from the front inside edge of the
box. Be careful not to rotate the circular disk as you
retighten the nut. Replace the sensor box cover.
3. Some models of the sensor box have a mark on the
vertical flat-bar link which should line up with a mark
on the link’sslotted mount plate at the correct preset
voltage. With the depth sensing wheel in the max
down position, the marks should line up at a voltage
of5 voltsDC+ or-1/4volt.Aligningthe marks is more
9/21/05
CPH and CP1000 Coulter Command System 148-258M-B
9
Section 2 Operating Instructions
Section 2 Operating Instructions
Great Plains Mfg., Inc.
The Coulter Command couples a microprocessor with
electro-hydraulics to provide a state-of-the-art system
formaintaining coulter depth regardless of the terrain or
soil type. It also provides coulter depth adjustment
"FromThe Tractor Cab". A manual feature allows manual control of the front hydraulic tongue cylinder for
hitching, unhitching, or making adjustments. To understand the Coulter Command system, one must be
familiarwith the functions of the hydraulics and the electronic controls.
Load Sensing Hydraulics
To operate Coulter Command, some tractors with loadsensing or constant-flow hydraulics require a bypass
valve,GreatPlains partnumber810-400C.Contact your
Great Plains dealer to order the bypass valve.
NOTE: Failure to install a bypass valve on load-sensingtractorsmaycause major tractor damage. Consult
yourtractor dealertoverifyif the bypass valveis needed.
After installing the bypass valve,set valve as follows:
Refer to Figure8
1. Closebypassvalvefor no oilflowbyturning knob (1)
on valveclockwise.
17987
Figure 8
Bypass Valve
2. Adjust flow-control valvefor tractor to a maximum of
10 gpm. If youdo not have a flowmeter, hook a standard8-inch stroke,4-inchbore cylinder tothecircuit.
At 10 gpm, the cylinder will take about 2.6 seconds
to extend.
3. Engage tractor hydraulics for Coulter Command.
4. Using a pressure gauge, turnknob on bypass valve
counterclockwiseuntilpressure gauges reads 1800
psi. Lock bypass valve at this setting.
Hydraulic Hook-Up & Function
Tractors with closed-center hydraulic systems and
variable displacement hydraulic pumps.
(If you are not familiarwith your tractor's hydraulics, consult your tractor dealer.)
For tractors with closed-center hydraulics or pressure/
flow compensated hydraulics which are powered by a
variable displacement hydraulic pump, turn the knurled
control knob on the left side of the hydraulic valve completelyclockwise and lockit in placewiththecircular lock
disk. Do not apply any torque to the control knob after it
bottoms out or valve damage may occur. Be sure the
lock disk is snugged to prevent the control knob from vibrating loose in field operation.
The tongue cylinder hydrauliccircuit consists of the hosesfromports "P" and "T". Once the hydraulicvalveis set
forCLOSED CENTER operation, the Coulter Command
tongue cylinder circuit requires live hydraulic power supplied to the port labeled "P". This is accomplished by
pushing FORWARD on the tractor remote hydraulic lever and LOCKING IT OPEN in this position.
• On John Deere tractors equipped with SOUND-
GUARDRBody you must use the LEVERLOCKCLIP
John Deere Part No. R52667 to lock the lever in the
forward position. See your tractor dealer for purchase
and installation of this clip.
• On John Deere 7000 Series tractors, rotate valve de-
tentselector to MOTOR POSITION to lock the lever in
the forward position.
• On Case-IHMagnumtractorsusethecircuitdesigned
for HYDRAULIC MOTOR CONTROL and lock the leverforwardin the detent position. The detent pressure
will probably have to be turned up to its maximum setting.DONOTtie the hydraulic lever on past the detent
positionwith a strap. This could shift the spool beyond
its designed operating position and cause system
damage. See your tractor dealer for hydraulic system
details.
• On other model tractors use the circuit designed for
HYDRAULIC MOTOR CONTROL and lock the lever
forwardinthe detent position. The detent pressure will
probably have to be turned up to its maximum setting
orsome other mechanicaldetentholder willhavetobe
usedto hold the lever forward.See your tractor dealer
for the proper means of providing constant pressure/
flow to the tongue cylinder circuit.
The Coulter Command hydraulic circuit requires a flow
rate of 8 to 12 gallons per minute forefficient operation.
On high flow rate tractors, the flow control on the tractor
remote mayhaveto be turned down soas not to exceed
12gallons per minute. Flow rates higher than 12 gallons
per minute will not damage the valve, but may cause
poor Coulter Command performance.
The remote tractor hydraulic leverwill have to be locked
in position to supply oil to the "P" port of the hydraulic
control valve, regardless of whether you want to control
the tongue hydraulic cylinder manually or automatically.
CPH and CP1000 Coulter Command System 148-258M-B 9/21/05
10
Loading...