GREAT PLAINS Terra Max HT1100-20 User guide

Manufacturing, Inc.
www.greatplainsmfg.com
© Copyright 2020 Printed 2020-12-22 589-930M
EN
ORIGINAL INSTRUCTIONS
Implement Command System
Manual
Terra Max
Read the operator’s manual entirely. When you see this symbol, the
subsequent instructions and warnings are serious - follow without
exception. Your life and the lives of others depend on it!
Illustrations may show optional equipment not supplied with standard unit.

ii Great Plains | 589-930M
Implement Command System
Machine Identification
Record your machine details in the log below. If you replace this manual, be sure to transfer this information to the new manual.
If you, or the dealer, have added Options not originally ordered with the machine, or removed Options that were originally
ordered, the weights and measurements are no longer accurate for your machine. Update the record by adding the machine weight
and measurements provided in the Specifications & Capacities Section of this manual with the Option(s) weight and
measurements.
Dealer Contact Information
Model Number
Serial Number
Machine Height
Machine Length
Machine Width
Machine Weight
Delivery Date
First Operation
Accessories
Name:
Street:
City/State:
Telephone:
Email:
WARNING: Cancer and reproductive harm - www.P65Warnings.ca.gov
!
California Proposition 65

Important Safety Information
12/22/2020 1
Important Safety Information
Look for Safety Symbol
The SAFETY ALERT SYMBOL indicates there is a potential
hazard to personal safety involved and extra safety precaution
must be taken. When you see this symbol, be alert and
carefully read the message that follows it. In addition to design
and configuration of equipment, hazard control and accident
prevention are dependent upon the awareness, concern,
prudence and proper training of personnel involved in the
operation, transport, maintenance and storage of equipment.
Be Aware of Signal Words
Signal words designate a degree or level of hazard seriousness.
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, typically for
machine components that, for functional purposes, cannot be
guarded.
WARNING indicates a potentially hazardous situation which,
if not avoided, could result in death or serious injury, and
includes hazards that are exposed when guards are removed. It
may also be used to alert against unsafe practices.
CAUTION 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.
Use Adequate Lifting Means
The frame sections and gangs of this machine are
extremely heavy. If using multiple lifters, make sure each
is rated for at least its share of the load.
Prepare for Emergencies
Be prepared if a fire starts
Keep a first aid kit and fire extinguisher handy.
Keep emergency numbers for doctor, ambulance, hospital
and fire department near phone.
Be Familiar with Safety Decals
Read and understand the “Safety Decals” section of the
Operators Manual.
Read all instructions noted on the decals.
Keep decals clean. Replace damaged, faded and illegible
decals.

2 Great Plains | 589-930M
Implement Command System, Terra Max
Wear Protective Equipment
Wear protective clothing and equipment.
Wear clothing and equipment appropriate for the job.
Avoid loose-fitting clothing.
Because prolonged exposure to loud noise can cause
hearing impairment or hearing loss, wear suitable
hearing protection such as earmuffs or earplugs.
Because operating equipment safely requires your full
attention, avoid wearing entertainment headphones while
operating machinery.
Avoid High Pressure Fluids
Escaping fluid under pressure can 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 suspected leaks.
Wear protective gloves and safety glasses or goggles when
working with hydraulic systems.
If an accident occurs, seek immediate medical assistance
from a physician familiar with this type of injury.
Use Safety Lights and Devices
Slow-moving tractors and towed implements can create a
hazard when driven on public roads. They are difficult to see,
especially at night.
Use flashing warning lights and turn signals whenever
driving on public roads.
Use lights and devices provided with implement.
Keep Riders Off Machinery
Riders obstruct the operator’s view. Riders could be struck by
foreign objects or thrown from the machine.
Never allow children to operate equipment.
Keep all bystanders away from machine during operation.
Shutdown and Storage
Lower implement, put tractor in park, turn off engine, and
remove the key.
Secure Hydraulic Reel Attachment using blocks and
supports provided.
Detach and store Hydraulic Reel Attachment in an area
where children normally do not play.

Important Safety Information
12/22/2020 3
Tire Safety
Tire changing can be dangerous and should be performed by
trained personnel using correct tools and equipment.
When inflating tires, use a clip-on chuck and extension
hose long enough for you to stand to one side–not in front
of or over tire assembly. Use a safety cage if available.
When removing and installing wheels, use wheel-handling
equipment adequate for weight involved.
Safety At All Times
Thoroughly read and understand the instructions in this
manual before operation. Read all instructions noted on the
safety decals.
Be familiar with all machine functions.
Operate machinery from the driver’s seat only.
Do not leave machine unattended with tractor engine
running.
Do not stand between the tractor and machine during
hitching.
Keep hands, feet and clothing away from power-driven
parts.
Wear snug-fitting clothing to avoid entanglement with
moving parts.
Watch out for wires, trees, etc., when folding and raising
machine. Make sure all persons are clear of working area.

4 Great Plains | 589-930M
Implement Command System, Terra Max
Introduction
The Implement Command System has been designed with care
and built by skilled workers using quality materials. Proper
setup, maintenance, and safe operating practices will help the
customer get years of satisfactory use from this system.
Description of Unit
The new Implement Command system now gives Terra Max
owners access to more data and technology. The Implement
Command System gives producers the data needed to make
decisions about their fields, while making real-time
adjustments to improve yields and soil health. Available on
20'-40’ Terra Max models, the Implement Command
System (ICS) allows you to take command of all your
adjustment and monitoring needs right at your fingertips. Set,
adjust, and monitor your Terra Max right on your ISO-
compatible monitor in your tractor cab.
Using This Manual
This manual will familiarize you with
safety, assembly, operation,
adjustments, troubleshooting, and
maintenance. Read this manual and
follow the recommendations to help
ensure safe and efficient operation.
The information in this manual is current at printing. Some
parts may change to assure top performance.
Definitions
The following terms are used throughout this manual.
A crucial point of information related to the preceding topic.
Read and follow the directions to remain safe, avoid serious
damage to equipment and ensure desired field results.
Useful information related to the preceding topic.
Further Assistance
Great Plains Manufacturing, Inc. wants you to be satisfied
with your new Terra Max. If for any reason you do not
understand any part of this manual or are otherwise dissatisfies
with the product please contact:
Great Plains Service Department
1525 E. North St.
PO Box 5060
Salina, KS 67402-5060
Or go to www.greatplainsag.com and follow the contact
information at the bottom of your screen for our service
department.
Figure 1
Implement Command System
TP-69747

Assembly
12/22/2020 5
Assembly
Implement Command System
Refer to Figure 2
The Controller Assembly will be shipped in a container, with
the installation hardware and will need installed on the top of
the brace bar, on the left hand side of the center brace bar.
Implement Command Wiring Harness
The wiring may need to be routed and installed on the frame of
the machine. The wiring harness is labeled near each of the
connectors to indicate which sensor or solenoid it is to be
plugged into. See “Wiring Connections Layout” on page 20.
Refer to Figure 3 & 4
Plug-in the hitch harness into the tractor and the other end into
the ICS Control Box located on the front of the left hand side
of the machine. Be sure the ICS box orientation is correct, the
openings for the plugs will be facing the inside of the machine
as shown in the parts manual.
The frame harness will plug into the ICS Control box and then
run to the other connections on the rest of the machine. It will
run under the frame tube and over to the valves.
Figure 2
ICS Controller Assembly
TP-69568
Figure 3
ICS Hitch Harness
TP-69555
Figure 4
ICS Hitch Harness
TP-69556

6 Great Plains | 589-930M
Implement Command System, Terra Max
Refer to Figure 5 & 6
The cylinder that is located on the hitch will be connected to
the FAS1wire on the harness. The harness will run under the
cylinder, thru the “ears” that connect to the H-bracket and
towards the center frame.
Refer to Figure 7
The gang angle is located on the right hand side of the front
brace bar, the wiring harness is labeled as GAS this will route
along the rear of the tube and be connected using p-clamps to
the bolts that are welded to the frame.
You may have to install the sensor on to the gauge bracket, use
the #10 x 214 bolts and hardware to install as shown.
Install the sensor in orientation shown and the small white
dot must be positioned toward the angle gauge when it is
installed on to the bracket. If not the sensor will not
function correctly and may cause dame to the machine.
Figure 5
Hitch Cylinder
TP-69547
Figure 6
Hitch Wiring
TP-69553
Figure 7
Gang Angle
TP-69548
TP-69779

Assembly
12/22/2020 7
Refer to Figure 8
The Down Pressure Valve (1) (for the finisher down pressure) is plugged into Finisher DPT1, Finisher DPT3, Finisher and DPC1,
on the frame harness. The Down Pressure Valve (2) (for the wing down pressure) is plugged into DPT1, DPT3, and DPC1, on the
frame harness. The Depth Control Valve (3) is attached to DCC1 and DCC2 harness plugs. After being attached to the Down
Pressure (1 & 2) and Depth Control Valve (3) the hydraulic hoses and the wiring harness will be routed along the left side brace
bar and to the left side of the torque tube, See Wiring Connections Layout for routing. Be sure to keep any excess wiring away
from pinch points. Use hose wrap or zip ties if needed. Wiring harness will be labeled with connection names, match the labels on
the valves with the labels on the harness.
TP-69739
TP-69784
Figure 8
Down Pressure & Depth Control Valves
TP-69743
TP-69798
3
1
2
3
1
2
HT1100-40 HT1100-40

8 Great Plains | 589-930M
Implement Command System, Terra Max
Refer to Figure 9
The Splitter Valve is attached on the right hand side of the center
brace bar. The Splitter valve is attached to SVC1 and SVC2 on
the center frame harness.
Refer to Figure 10
If the machine does not have proximity sensors then there will
be jumper plugs that must be in place on those harness
connections. These will come installed in the harness, but
please note that they must be in place. This may be a trouble
shooting point if you have issues in the future.
If your machine has proximity sensors (installed on Models
HT1100-30 & HT1100-40) then the harness will route out along
the center frame following the hydraulic hose route, using zip
ties or p-clamps to secure it to the hydraulic hoses and connect
to the sensors. These plugs are labeled as ProxLH and ProxRH.
Be sure to run them out to the correct wings. If not already
installed, the proximity sensors may need to be installed into the
brackets on the wing hinges. See parts manual for proper
adjustment.
Figure 9
Splitter Valve
TP-69557
Figure 10
Wing Wiring Route
TP-69559

Assembly
12/22/2020 9
Refer to Figure 11
The Depth Control Sensor and the hardware that connects to the
torque tube will be shipped in place on the center frame, the
adjustable link may need connected to the torque tube. This may
be left unattached to during shipment to keep it from bending.
Connect the center frame harness, DCS lead to this sensor. The
bolts must be installed with the head of the bolt towards the
inside of the machine.
The adjustable link that attaches the sensor arm to the toque
tube, is 4.25 inches long on the HT1100-20 & 25, and 5.50
inches on the HT1100-30-40. This can be adjusted later if
needed.
Be sure to install the bolts with the head of the bolt to the
inside of the frame tube. If not there will be clearance issues.
Check Parts manual for location on frame tube.
Attach the harness to the main frame of the machine and
connect wiring harnesses to locations indicated in the Layout
Section of this manual.
The hydraulic hoses will need to be routed from the hitch and
hooked up to the depth control valve and the down pressure
valve. Hoses will need to be routed to the reel attachment as
well. Route the harness along the hitch and follow the
hydraulic hoses.
See Layout or Parts manual for full break down of parts and
connection diagram.
Refer to Figure 12
Location dimensions are taken from the front of the plate that
attaches the torque tube to the center frame to the rear of the
attachment plate bracket as shown in the figure.
Figure 11
Depth Control Sensor
TP-69510
Figure 12
Location Dimensions
TP-69733

10 Great Plains | 589-930M
Implement Command System, Terra Max
Refer to Figure 13
The wiring will follow the hydraulic hoses that are hooked to
the torque tube cylinder secured with p-clamps.
After all the connections are made, extra wire can be bundled
up and secured together with a zip tie to keep from getting
damaged.
Figure 13
Wiring Route
TP-69561

Operation
12/22/2020 11
Operation
Implement Command System
Refer to Figure 14
This system allows you to monitor and adjust Hydraulic Down
Pressure on the wings and finisher and Working Depth from an
ISOBUS Virtual Terminal.
You can also monitor Gang Angle, Fore & Aft leveling, these
must be adjusted by using the hydraulic lever in the tractor.
First Time Set Up
Plug in electronic wiring harness.
Once the monitor starts up navigate to the ISOBUS virtual
terminal on the ISO VT. It may take a few minutes to load the
object pool the first time.
Figure 14
ICS Home Screen
TP-69755

12 Great Plains | 589-930M
Implement Command System, Terra Max
Depth Control
Refer to Figure 15
The manual depth stop need to be turned all the way out
for the ICS System to work correctly.
The desired depth is set with the virtual terminal but you must
use the hydraulic remote control lever to operate the machine.
When you want to set a new depth you adjust it on the screen,
then use the hydraulic remote control lever. There are 3
programmable presets that allow you to make adjustments
quickly.
You are able to set the target depth by using the arrow keys or
by tapping one of the 3 the preset buttons, or tap one of the
target depth boxes and set the target depth with the key pad.
Figure 15
Depth Control
TP-69755a
Decrease
Depth
Highlighten Area
Is Target Depth Actual
Depth
{
Increase
Depth
Depth Control
Feature {
Manual Depth
Control Button
Presets

Operation
12/22/2020 13
Null4:
The Fore/Aft Leveling and the Gang Angle are on the
same hydraulic circuit, to change from one to the other
you must use the lock button to designate which option
you want to adjust. The gang angle is the primary control
on this circuit, when the lock button shows that it is
locked the gang angle is what will be adjusted. after 15
seconds of inactivity on the fore/aft cylinder it will lock
automatically back to the gang angle adjustment.
Gang Angle
The gang angle can be monitored from the screen, you must
adjust this with the hydraulic circuit lever.
Fore/Aft Leveling
Fore/Aft leveling can be monitored, and locked in place on the
screen, and must be unlocked before using the hydraulic
circuit to make changes. This will automatically reset to the
default locked setting after a few seconds of inactivity. This
may be used to level the machine.
Figure 16
Reel Position, Fore/Aft, Gang Angle
TP-69755b
Finisher
Pressure
Gauge
Fore/Aft
Position Gauge
Fore/Aft
Lock
Gang Angle
Gauge

14 Great Plains | 589-930M
Implement Command System, Terra Max
Hydraulic Down Pressure (wings)
Refer to Figure 17
The down pressure is active and can be increased or decreased,
on the go through the field. You may adjust this by using the
up and down arrows under the down pressure title. Select the
machine section (inside or outside wings on 5 section models)
you want to adjust the pressure of and use the arrow keys or
the key pad to adjust.
3-Section Wings
On a 3 section machine if you want to run 0 down pressure you
just set the fold hydraulic circuit into the float position
allowing the wings to move while not applying down pressure
to them.
5-Section Wings
On a 5 section machine both the inner and outer wings share
the same hydraulic circuit so with the down pressure feature
you can apply down pressure to the inner wings but allow the
outer wings to float freely.
Figure 17
5-Section Screen - Down Pressure
TP-69755c
Increase
Pressure
Decrease
Pressure
Wing Down
Pressure
Wing Down
Pressure

Operation
12/22/2020 15
Manual override
Depth control valve
Push button and turn ¼ turn on coil DCC1, this will cause the
button to pop out and then you can adjust your depth with the
manual depth valve.
Wing Down Pressure – lower valve
Refer to Figure 18
When in override the high pressure proximity sensors will not
work. You will need to adjust the pressure up to get the wings
to unfold, turn the 3/16” alen screw so that in moves in, to do
this. Engage SCV then start to dial up the pressure, watch
gauges DO NOT exceed 900psi, frame damage could occur.
On a 5-section machine coil DPC1 will control the inner wings
and the outer wings are controlled by DPC2 on the valve. On a
3-section this will be DPC1 only. You may need to adjust the
pressure back down to run in the field depending on the
amount of pressure needed.
Finisher Reel – upper valve
To override the finisher down pressure valve you need to
adjust the 3/16” alen screw in, Engage SCV then start to dial
up the pressure, watch gauges DO NOT exceed 900psi, frame
damage could occur. this will increase the pressure to the reels,
this is on coil DPC1.
Splitter Valve
To override the splitter valve functions and divert oil to the
fore/aft adjustment you will need to turn both screws all the
way in *DO NOT over tighten when you feel any resistance
stop adjusting the screw, over tightening will cause damage to
the cartridges. Once the fore/aft circuit is engaged set your
hitch height. Adjust both screws out all the way and now the
gang hydraulic circuit is engaged and you may adjust your
gangs to the angle desired.
If the monitor in the tractor malfunctions for some reason or
there has been another issue, you may turn each of the
functions off on the monitor. Tap settings and tab the off button
on the screen for each function, and use the machine in manual
override.
Figure 18
Down Pressure Valves
TP-69755

16 Great Plains | 589-930M
Implement Command System, Terra Max
Terra Max ICS System 20-35
TP-69733

Operation
12/22/2020 17
Terra Max ICS System 20-35 Parts List
TP-69733 Image No.
1 843-222C DOWN PRESSURE VALVE 1 CIRCUIT
2 843-226C DEPTH CONTROL VALVE
3 843-225C SPLITTER VALVE
4 589-887S GPAC CONTROLLER ASSEMBLY
5 589-725S TM DEPTH CONTROL SENSOR ASSY Inludes items 11, 19, 20 & 30-34
6 589-727S ADJUSTABLE LINK 4.25" 20-25
6 589-728S ADJUSTABLE LINK 5.50" 30-35
7 843-407C 3-SECTION ICS FRAME HARNESS 20-30
7 843-453C 3-SEC WIDE ICS FRAME HARNESS 35
8588-035H ANGLEGAUGE 20-30
8 589-770H HYD REEL GAUGE 35
9 588-034H GAUGE BRACKET 20-35
10 843-206C 70 DEGREE GAUGE SENSOR
Used on gange angle Connects to Gang
Angle Sensor
11 837-048C FLANGE BEARING - 3/8
12 806-122C U-BOLT 1/2-13 X 3 1/32 X 6
13 804-015C WASHER LOCK SPRING 1/2 PLT
14 803-020C NUT HEX 1/2-13 PLT
15 802-046C HHCS 1/2-13X5 1/2 GR5
35 (Must be installed with the bolt head
on inside of frame)
15 802-413C HHCS 1/2-13X4 1/2 GR5
18-30 (Must be installed with the bolt
head on inside of frame)
16 843-241C GPIC HITCH HARNESS
17 802-179C HHCS 5/16-18X1 1/2 GR5 FTHD
18 803-123C NUT HEX TOP LOCK 3/8-16 PLT
19 801-285C PHMS #10-24X2 1/4 GR18-8 SS
20 803-517C NUT HEX FLANGE #10-24 NYL
21 802-007C HHCS 5/16-18X3/4 GR5
22 804-010C WASHER FLAT 5/16 USS PLT
23 804-009C WASHER LOCK SPRING 5/16 PLT
24 803-008C NUT HEX 5/16-18 PLT
25 589-374D PLATE - TORCHED
26 844-227C IMPLEMENT COMMAND DECAL
27 844-218C DECAL TERRAMAX GAUGE
28 848-972C DECAL OPERATOR INSTRUCT TM
29 843-222C DOWN PRESSURE VALVE 1 CIRCUIT Used for the Finishing Reel
30 589-735H DEPTH SENSOR MOUNT
31 589-736H SENSOR LEVER
32 843-187C DEPTH CONTROL SENSOR TM
33 800-459C SNAP RING 3/8 Not Shown
34 837-049C FLANGE BEARING - 3/8 Not Shown

18 Great Plains | 589-930M
Implement Command System, Terra Max
Terra Max ICS System 40
TP-69776