GREAT PLAINS CT8300 User manual

Manufacturing, Inc.
www.greatplainsmfg.com
© Copyright 2022 Printed 2022-11-15 564-278M
EN
Table of Contents Index
Table of Contents Index
ORIGINAL INSTRUCTIONS
Operator Manual
CT8300 Flex Harrow
CT8300-18 - CT8300-60
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, or may
show wider or narrower models where the topic function is identical.
TP-77051

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 with the option(s) weight and measurements.
Dealer Contact Information
Model Number
Serial Number
Machine Height
Machine Length
Machine Width
Machine Weight
Year of Construction
Delivery Date
First Operation
Accessories
Name:
Street:
City/State:
Telephone:
Email:
Dealer’s Customer No.:
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

CT8300 Flex Harrow Cover Index Table of Contents
Great Plains | 564-278M | 11/15/2022 Cover Index iii
© Copyright 2022 All rights Reserved
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. assumes no responsibility for errors or omissions. Neither is any liability assumed
for damages resulting from the use of the information contained herein. Great Plains Manufacturing, Inc. reserves the right to revise and improve its products
as it sees fit. This publication describes the state of this product at the time of its publication, and may not reflect the product in the future.
Trademarks of Great Plains Manufacturing, Inc. include: AccuShot, Max-Chisel, Row-Pro,
Singulator Plus, Short Disk, Swath Command, Terra-Tine, Ultra-Chisel, and X-Press.
Registered Trademarks of Great Plains Manufacturing, Inc. include: Air-Pro, Clear-Shot, Discovator, Great Plains, Land Pride, MeterCone,
Nutri-Pro, Seed-Lok, Solid Stand, Terra-Guard, Turbo-Chisel, Turbo-Chopper, Turbo-Max, Turbo-Till, Ultra-Till, Whirlfilter, and Yield-Pro.
Brand and Product Names that appear and are owned by others are trademarks of their respective owners.
Printed in the United States of America
Table of Contents
Important Safety Information................................................1
Safety Decals ....................................................................5
Introduction...........................................................................12
Description of Unit ...........................................................12
Models Covered ..............................................................12
Intended Usage ........................................................12
Document Family .....................................................12
Using This Manual...........................................................12
Definitions.................................................................12
Further Assistance...........................................................13
Preparation and Setup .........................................................14
Initial Setup......................................................................14
Post-Delivery/Seasonal Setup.........................................14
Pre-Application Setup......................................................14
Hitching Harrow to Tractor...............................................15
Electrical Hookup .....................................................16
Hydraulic Hose Hookup............................................16
Operating Instructions .........................................................17
Pre-Start Checklist...........................................................17
Fold..................................................................................20
Transport .........................................................................21
Harrow Transport Weights .......................................21
Transport Steps........................................................21
Field Operation ................................................................22
Field Set-Up Checklists ...................................................22
Short-Term Parking .........................................................23
Long-Term Storage .........................................................23
Adjustments ..........................................................................24
Wing Fold Height Adjustment..........................................24
Wing Fold Height......................................................24
Troubleshooting ...................................................................25
Maintenance and Lubrication ..............................................26
Maintenance ....................................................................26
Lubrication and Scheduled Maintenance ........................27
Hydraulic Maintenance ....................................................28
Hydraulic Connectors and Torque...................................29
Bleeding Hydraulics..................................................30
Appendix A - Reference Information ..................................31
Specifications and Capacities..........................................31
Tire Inflation & Warranty..................................................32
Torque Values Chart .......................................................33
Appendix B - Initial Setup ....................................................34
Post-Delivery Checklist....................................................34
Hitch Configuration ..........................................................34
Hitch Height or Hitch Inversion.................................34
Clevis Hitch ..............................................................35
Category III Hitch .....................................................35
Tooth Angle .....................................................................36
Spot Implement ........................................................36
Disconnecting Leading Chains.................................36
Disconnecting Trailing Chains..................................37
Reconnect Leading Chains......................................37
Reconnect Trailing Chains.......................................37
Harrow Drag Identification...............................................38
Harrow Drag Layouts ...............................................38

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CT8300 Flex Harrow Table of Contents Index

CT8300 Flex Harrow Table of Contents Index Important Safety Information
Great Plains | 564-278M | 11/15/2022 Table of Contents Index 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.
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. Know the reporting
requirement for spills or releases of the chemicals you are
using. Have contact numbers available.
Be Familiar with Safety Decals
Read and understand “Safety Decals” on page 5,
thoroughly.
Read all instructions noted on the decals.
Keep decals clean. Replace damaged, faded and illegible
decals.

Great Plains | 564-278M | 11/15/2022 Table of Contents Index 2
CT8300 Flex Harrow Table of Contents Index Important Safety Information
Use Safety Chains
Use safety chains to help control drawn machinery should
it separate from tractor draw-bar or trailing nurse tank
hitch.
Use chain with a strength rating equal to or greater than
the gross weight of towed machinery.
Attach implement chain to tractor draw-bar support or
specified anchor location. Allow only enough slack in
chain for turns.
Replace chain if any links or end fittings are broken,
stretched or damaged.
Do not use safety chain for towing.
Avoid High Pressure Fluids
Escaping fluid under pressure can penetrate the skin, causing
serious injury. This flex harrow requires a Power-Beyond port,
which is always under pressure when the tractor is running.
Avoid the hazard by relieving pressure at other remotes,
and shutting down tractor before connecting,
disconnecting or inspecting 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.
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.
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.

CT8300 Flex Harrow Table of Contents Index Important Safety Information
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Transport Machinery Safely
Maximum transport speed for implement is 20 mph (32 kph),
13 mph (22 kph) in turns. Some rough terrains require a slower
speed. Sudden braking can cause a towed load to swerve and
upset.
Do not tow an implement or nurse tank that weighs more
than 1.5 times the weight of towing vehicle.
Carry reflectors or flags to mark flex harrow in case of
breakdown on the road.
Keep clear of overhead power lines and other
obstructions when transporting. Refer to transport
dimensions under “Specifications and Capacities” on
page 31.
Do not exceed 20 mph. Never travel at a speed which does
not allow adequate control of steering and stopping.
Reduce speed if towed load is not equipped with brakes.
Reduce speed on rough roads.
Comply with national, regional and local laws.
Do not fold or unfold the flex harrow while the tractor is
moving.
Shutdown and Storage
Lower flex harrow, put tractor in park, turn off engine,
and remove the key.
Secure flex harrow using parking jack provided.
Detach and store flex harrow in an area where children
normally do not play.
Tire Safety
Tire changing can be dangerous. Employ 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.

Great Plains | 564-278M | 11/15/2022 Table of Contents Index 4
CT8300 Flex Harrow Table of Contents Index Important Safety Information
Practice Safe Maintenance
Understand procedure before doing work. Use proper
tools and equipment. Refer to this manual for additional
information.
Work in a clean, dry area.
Lower implement, put tractor in park, turn off engine,
and remove key before performing maintenance.
Make sure all moving parts have stopped and all system
pressure is relieved.
Disconnect battery ground cable (-) before servicing or
adjusting electrical systems or before welding on flex
harrow.
Inspect all parts. Make sure parts are in good condition
and installed properly.
Remove buildup of grease, oil or debris.
Remove all tools and unused parts from implement
before operation.
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 flex harrow functions.
Operate machinery from the driver’s seat only.
Do not leave flex harrow unattended with tractor engine
running.
Do not stand between tractor and implement, or
implement and nurse tank, 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
flex harrow. Make sure all persons are clear of working
area.

CT8300 Flex Harrow Table of Contents Index Important Safety Information
Great Plains | 564-278M | 11/15/2022 Table of Contents Index 5
Safety Decals
Safety Reflectors and Decals
Your implement comes equipped with all lights, safety
reflectors and decals in place. They were designed to help you
safely operate your implement.
Read and follow decal directions.
Keep lights in operating condition.
Keep all safety decals clean and legible.
Replace all damaged or missing decals. Order new decals
from your Great Plains dealer. Refer to this section for
proper decal placement.
When ordering new parts or components, also request
corresponding safety decals.
To install new decals:
1. Clean the area on which the decal is to be placed.
2. Peel backing from decal. Press firmly on surface, being
careful not to cause air bubbles under decal.
818-055C
Slow Moving Vehicle Reflector
On cross-bars at center;
1 total TP-77039
838-614C
Red Reflectors
On rear of center frame, above red tail lights (both sides);
2 total
TP-77039

Great Plains | 564-278M | 11/15/2022 Table of Contents Index 6
CT8300 Flex Harrow Table of Contents Index Important Safety Information
838-615C
Amber Reflectors
On outside face of wing end arm mounts, and on outside of
tongue, front, angle tube (both sides);
4 total - CT8300-18 - 27
6 total - CT8300-30 - 45
8 total - CT8300-48 - 60
TP-77039
TP-77039
838-603C
Daytime (Orange) Reflectors
On rear of center wing (bottom) when folded up (both sides);
2 total
TP-77039
838-599C
Danger: Electrocution
On top face of tongue;
1 total
To prevent serious injury or death:
Stay away from power lines when
transporting, extending or folding
implement.
Electrocution can occur without
contacting power lines.
838-599C
ELECTROCUTION HAZARD
DANGER
TP-77039

CT8300 Flex Harrow Table of Contents Index Important Safety Information
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838-600C
Danger: Hitch Crush
On top face of tongue near hitch;
1 total
DANGER
CRUSHING HAZARD
To prevent serious injury or death:
Do not stand between implement
and moving tractor.
Stop tractor engine and set park
brake before installing pins.
838-600C
42319
848-705C
Danger: Tip Over Hazard
On outside of wing end arm mount (both sides), on top face of
tongue front, and rear of machine bottom wing frame tube
(folded);
3 total
TIP OVER HAZARD - Do Not Walk
Behind Machine When in the Vertical
Position. Hydraulic Malfunction or Hitch
Pin Coming Loose can Allow Machine to
Tip Over Resulting in Injury or Death.
848-705C
DANGER
TP-77039
TP-77039
818-337C
Warning: Speed
On top face of tongue near hitch;
1 total
WARNING
EXCESSIVE SPEED
HAZARD
Do Not Exceed 20 mph maximum
transport speed. Loss of vehicle
control and/or machine damage
can result.
To Prevent Serious Injury or Death:
818-337C Rev. B
TP-77039

Great Plains | 564-278M | 11/15/2022 Table of Contents Index 8
CT8300 Flex Harrow Table of Contents Index Important Safety Information
838-094C
Warning: High Pressure Fluid Hazard
One on top face of tongue with other safety decals, one below
hydraulic valve;
2 total
Keep all components in good repair.
HIGH PRESSURE FLUID HAZARD
To prevent serious injury or death:
Relieve pressure on system before repairing or
adjusting or disconnecting.
Wear proper hand and eye protection when searching
for leaks. Use wood or cardboard instead of hands.
838-094C
WARNING
TP-77039
818-019C
Warning: Negative Tongue Weight
On tounge frame section;
1 total
WARNING
NEGATIVE TONGUE WEIGHT
HAZARD
Negative tongue weight can cause immediate
elevation of tongue when unhitching implement
To prevent serious injury or death:
Always be certain implement is hitched securely
to tractor drawbar before raising.
Lower implement BEFORE unhitching.
818-019C Rev. D
TP-77039
838-602C
Warning: Overhead Wing
On front (when unfolded) face of wing frame near wing wheel
(top and bottom of tube) (both sides);
4 total
WARNING
OVERHEAD WING HAZARD
To prevent serious injury or death:
Stay away from wings when they are
raised or are being lowered.
Lock in up position before transport
or service.
838-602C
Keep others away.
TP-77039

CT8300 Flex Harrow Table of Contents Index Important Safety Information
Great Plains | 564-278M | 11/15/2022 Table of Contents Index 9
848-704C
Warning: Cylinder or Frame Damage
On front section of hitch frame;
4 total
818-398C
Caution: Tires Not a Step
On outside face of wing end arm mount (both sides);
2 total
CYLINDER OF FRAME DAMAGE MAY OCCUR
Extend Wing Fold Cylinders Completely
to Allow Up and Down Movement of
Wings During Field Operation.
848-704C
WARNING
TP-77039
To Avoid Injury for Unsecured
Transport Tires:
Never stand on or use transport
tires as a step.
Tires not in contact with the
ground will rotate easily.
818-398C
CAUTION
TP-77039
838-598C
Caution: Read Operator’s Manual
On top face of tongue in front of manual pak (rear);
1 total
838-598C
1. Read and Understand the Operator's Manual before using machine.
2. Stop tractor engine, lower machine to the ground, place all controls
in neutral, set park brake, remove ignition key and wait for all
moving parts to stop before servicing, adjusting, repairing,
unplugging or fitting.
3. Keep hands, feet, hair and clothing away from earth·working points
and blades.
4. Do not allow riders.
5. Clean reflectors, SMV and lights before transporting.
6. Install safety locks before transporting or working beneath
components.
7. Add extra lights and use pilot vehicle when transporting during times
of limited visibility.
8. Use hazard flashers in tractor when transporting.
9. Install safety chain when attaching to tractor.
10. Review safety instructions with all operators annually.
CAUTION
WARNING:
Cancer and Reproductive Harm - www.P65Warnings.ca.gov
TP-77039

Great Plains | 564-278M | 11/15/2022 Table of Contents Index 10
CT8300 Flex Harrow Table of Contents Index Important Safety Information
838-092C
Caution: Tire Torque/ PSI
Center fame near tires (each side);
Wing frame near Gauge Wheels (each side);
Models-CT8300-33, 36, 39, & 42
4 total
818-752C
Caution: Tire Torque/ PSI
Center Frame near tires (each side);
Wing Frame near Gauge Wheels (each Side;
Models CT8300-18-30 & CT8300-45-60
4 total
858-815C
Caution: Tire Torque/ PSI
Tire Option on models 45-60
Center Frame near tires (each side);
Wing Frame near Gauge Wheels (each Side;
Models CT8300-45-60
4 total
CAUTION
To Avoid Injury or Machine Damage from Improper Tire
Inflation or Torquiing of Wheel Bolts:
• Maximum inflation pressure of tires is 60 psi.
• Torque wheel bolts to 90 - 105 ft-lb.
838-092C
TP-77101
CAUTION
To Avoid Injury or Machine Damage from Improper Tire
Inflation or Torquiing of Wheel Bolts:
• Maximum inflation pressure of tires is 52psi.
• Torque wheel bolts to 90ft-lb.
818-752C
TP-77101
CAUTION
To Avoid Injury or Machine Damage from Improper Tire
Inflation or Torquiing of Wheel Bolts:
• Maximum inflation pressure of tires is 64 psi.
• Torque wheel bolts to 85 ft-lb.
858-815C
TP-77101

CT8300 Flex Harrow Table of Contents Index Important Safety Information
Great Plains | 564-278M | 11/15/2022 Table of Contents Index 11
844-478C
Notice: Cylinder or Frame Damage
On top face of Wing Frame near hinge (both sides);
2 total
NOTICE
Cylinder or
frame Damage
May Occur!
848-707C
Extend Cylinder
Completely Until
Pin is Centered
In this Slot.
TP-77088

Great Plains | 564-278M | 11/15/2022 Table of Contents Index 12
CT8300 Flex Harrow Table of Contents Index Introduction
Introduction
Great Plains welcomes you to its growing family of new
product owners. The Flex Harrow has been designed with care
and built by skilled workers using quality materials. Proper
setup, maintenance, and safe operating practices will help you
get years of satisfactory use from the machine.
Description of Unit
The CT8300 Flex Harrow is a heavy-duty flexible-link spike
harrow. It is a pull-type implement intended for towing
directly behind a tractor, or behind another implement. The
outer sections fold up and forward for transport, See
“Specifications and Capacities” on page 31 for transport
width.
Models Covered
Intended Usage
Use the Flex Harrow to level soil, firm seedbeds, break up and
spread residue. Do not modify Great Plains-provisioned
components, or install user-provisioned components, except as
authorized or recommended by Great Plains.
Document Family
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.
Right-hand and left-hand as used in this
manual are determined by facing the
direction the machine will travel while in
use unless otherwise stated. An orientation
rose in some line art illustrations shows the
directions of: Up, Back, Left, Down, Front,
Right.
“(Option)” refers to components not part of the standard
product, and not “optional” steps.
U
D
F
B
L
R
L
R
TP-77051
CT8300-18 8 & 16-Bar, 18-Foot, Heavy-Duty
CT8300-21 8 & 16-Bar, 21-Foot, Heavy-Duty
CT8300-24 8 & 16-Bar, 24-Foot, Heavy-Duty
CT8300-27 8 & 16-Bar, 27-Foot, Heavy-Duty
CT8300-30 8 & 16-Bar, 30-Foot, Heavy-Duty
CT8300-33 8 & 16-Bar, 33-Foot, Heavy-Duty
CT8300-36 8 & 16-Bar, 36-Foot, Heavy-Duty
CT8300-39 8 & 16-Bar, 39-Foot, Heavy-Duty
CT8300-42 8 & 16-Bar, 42-Foot, Heavy-Duty
CT8300-45 8 & 16-Bar, 45-Foot, Heavy-Duty
CT8300-48 8 & 16-Bar, 48-Foot, Heavy-Duty
CT8300-51 8 & 16-Bar, 51-Foot, Heavy-Duty
CT8300-54 8 & 16-Bar, 54-Foot, Heavy-Duty
CT8300-57 8 & 16-Bar, 57-Foot, Heavy-Duty
CT8300-60 8 & 16-Bar, 60-Foot, Heavy-Duty
564-278M Operator Manual (this document)
564-278P Parts Manual
564-278Q Pre-Delivery Manual
564-278Q-ENG Assembly Manual
U
D
F
B
L
R

CT8300 Flex Harrow Table of Contents Index Introduction
Great Plains | 564-278M | 11/15/2022 Table of Contents Index 13
Further Assistance
Great Plains Manufacturing, Inc. and your Great Plains dealer
want you to be satisfied with your new Flex Harrow. If for any
reason you do not understand any part of this manual or are
otherwise dissatisfied, please take the following actions first:
1. Discuss the matter with your dealership service manager.
Make sure they are aware of any problems so they can
assist you.
2. If you are still unsatisfied, seek out the owner or general
manager of the dealership.
If your dealer is unable to resolve the problem or the issue is
parts related, please contact:
Great Plains Service Department
1525 E. North St.
P.O. 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.
TP-77042

Great Plains | 564-278M | 11/15/2022 Table of Contents Index 14
CT8300 Flex Harrow Table of Contents Index Preparation and Setup
Preparation and Setup
This section helps you prepare your tractor and CT8300 Flex
Harrow Flex Harrow for use, and covers tasks that need to be
done seasonally, or when the tractor/flex harrow configuration
changes.
Before using the harrow in the field, you must hitch it to a
suitable tractor or leading implement, inspect systems and
unfold the harrow. Before using the flex harrow for the first
time, and periodically thereafter, certain adjustments may be
required.
Initial Setup
See “Appendix B - Initial Setup” on page 34 for first-time/
infrequent setup tasks, including:
•Hitch Configuration (page 34).
•Tooth Angle (page 36).
•Row Harrow Curtains (page 38).
Post-Delivery/Seasonal Setup
On initial delivery, and seasonally, check and as necessary,
complete these items before continuing to the routine setup
items:
•Bleed hydraulic system (page 30).
•De-grease exposed cylinder rods if so protected at last
storage.
Pre-Application Setup
Complete this checklist before routine setup:
Read and understand “Important Safety Information”
on page 1.
Check that all working parts are moving freely, bolts are
tight, and cotter pins are spread.
Check that all grease fittings are in place and lubricated.
See “Lubrication and Scheduled Maintenance” on
page 27.
Check that all safety decals and reflectors are correctly
located and legible. Replace if damaged. See “Safety
Decals” on page 5.
Inflate tires to pressure recommended and tighten wheel
bolts as specified. See “Tire Inflation & Warranty” on
page 32.

CT8300 Flex Harrow Table of Contents Index Preparation and Setup
Great Plains | 564-278M | 11/15/2022 Table of Contents Index 15
Hitching Harrow to Tractor
Hitch to a tractor for highway transport or field operations.
Hitch to a leading implement only for field operations. Do not
transport behind another implement.
Before hitching, check the compatibility and capability of the
towing tractor or implement:
•The flex harrow is a pull-type implement equipped with a
standard Category IV single tang hitch. It may be
converted to a Category III or clevis hitch using supplied
accessory parts (see “Hitch Configuration” on page 34).
•Tongue weight varies from 500 pounds to 3200 pounds,
depending on harrow model. See “Specifications and
Capacities”, pages 31.
•Recommended tractor horsepower is 3 hp per foot of
implement width (50 to 180 hp, depending on harrow
model). This is in addition to the power required for any
leading implement.
•A leading implement must pass through one hydraulic
circuit.
1. Use jack to raise and lower harrow tongue (1).
2. Back tractor draw bar into alignment with hitch.
3. Secure with a locking hitch pin (2).
Location of clevis can be adjusted to fit your tractor.
Negative Tongue Weight Hazard:
Make certain that harrow is securely hitched to the tractor or
leading implement before unfolding. An unhitched harrow can
tip over backwards during folding and unfolding if the tongue
is not secured.
4. Secure safety chain to an anchor on the tractor.
5. Retract jack foot. Re-orient jack to storage position.
6. After hitching tractor to harrow, store jack on storage stub
on flex harrow tongue.
1
2
TP-77040
Crushing Hazard:
Do not stand or place any body part between harrow and
moving tractor. You may be severely injured or killed by being
crushed between the tractor and harrow. Stop tractor engine
and set parking brake before attaching cables and hoses.

Great Plains | 564-278M | 11/15/2022 Table of Contents Index 16
CT8300 Flex Harrow Table of Contents Index Preparation and Setup
Electrical Hookup
Your flex harrow is equipped with lights.
Plug the lighting connector into the tractor outlet.
Test the lights and signaling prior to highway movement.
Hydraulic Hose Hookup
High Pressure Fluid Hazard:
Shut down tractor before making hydraulic connections.
Only trained personnel should work with system hydraulics.
Escaping fluid under pressure can have sufficient pressure to
penetrate the skin causing serious injury. If an accident
occurs, seek immediate medical assistance from a physician
familiar with this type of injury.
Use paper or cardboard, NOT BODY PARTS, to check for
leaks. Wear protective gloves and safety glasses or goggles
when working with hydraulic systems.
To distinguish hoses on the same hydraulic circuit, refer to
hose label.
•The hose with an extended-cylinder symbol feeds a
cylinder base end.
•The hose with a retracted-cylinder symbol feeds a
cylinder rod end.
Secure hoses and cables so that they have sufficient slack for
hitch movements, but cannot get caught between moving parts
of tractor, harrow or hitch. Failure to safely route and secure
hoses and cables could result in damage requiring component
repair/replacement, and lost field time.
36051
31733