Great Plains CPH-20 Operator Manual
Operator Manual
Center Pivot Hitch
Manufacturing, Inc.
www.greatplainsmfg.com
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 the lives of
others depend on it!
CPH
© Copyright 2011 Printed
12/29/2011
12074
Cover illustration may show optional equipment not supplied with standard unit.
148-152M
Table of Contents
Table of Contents
Great Plains Mfg., Inc.
Important Safety Information . . . . . . . . . . . . . . . . . . 1
Safety Decals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Description of Unit . . . . . . . . . . . . . . . . . . . . . . . . . 6
Intended Usage. . . . . . . . . . . . . . . . . . . . . . . . 6
Using This Manual. . . . . . . . . . . . . . . . . . . . . . . . . 6
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Owner Assistance . . . . . . . . . . . . . . . . . . . . . . . . . 6
Section 1 Preparation and Setup . . . . . . . . . . . . . . . 7
Prestart Checklist . . . . . . . . . . . . . . . . . . . . . . . . . 7
Hitching Tractor to Hitch . . . . . . . . . . . . . . . . . . . . 7
Hitching Drill to Hitch . . . . . . . . . . . . . . . . . . . . . . . 8
Hydraulic Hose Hookup. . . . . . . . . . . . . . . . . . . . . 8
Bleeding the Hydraulics. . . . . . . . . . . . . . . . . . . . . 9
Bleeding Tongue Cylinder . . . . . . . . . . . . . . . . 9
Bleeding Transport Lift Cylinders . . . . . . . . . 10
Section 2 Operating Instructions . . . . . . . . . . . . . . 11
Prestart Checklist . . . . . . . . . . . . . . . . . . . . . . . . 11
Field Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Pivot Lock Tubes . . . . . . . . . . . . . . . . . . . . . . 11
Transporting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Parking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Section 3 Adjustments . . . . . . . . . . . . . . . . . . . . . . 13
Coulter Down Pressure . . . . . . . . . . . . . . . . . . . . 13
Added Weight . . . . . . . . . . . . . . . . . . . . . . . . 13
Coulter Springs . . . . . . . . . . . . . . . . . . . . . . . 13
Seeding Depth. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Coulter Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Hydraulic Control. . . . . . . . . . . . . . . . . . . . . . 13
Coulter Mounting Height . . . . . . . . . . . . . . . . 14
Lock Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Conventional Tillage, Very Soft Soils . . . . . . . . . 14
Level Link Adjustment . . . . . . . . . . . . . . . . . . . . 15
Leaf Spring Adjustment . . . . . . . . . . . . . . . . . . . 15
Pivot Lock Tube Adjustment . . . . . . . . . . . . . . . . 15
Transport Cylinder Support Brace . . . . . . . . . . . 16
Section 4 Troubleshooting . . . . . . . . . . . . . . . . . . . 17
Section 5 Maintenance and Lubrication . . . . . . . . 18
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Slide Block . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Front Tongue to Main Frame Pivot . . . . . . . . 19
Top and Bottom Vertical Pivot Bushings . . . 19
Level Link Pivot Tube . . . . . . . . . . . . . . . . . . 19
Transport Hub Wheel Bearings . . . . . . . . . . 20
Coulter Hub Bearings. . . . . . . . . . . . . . . . . . 20
Coulter Swing Arm Pivot . . . . . . . . . . . . . . . 20
Section 6 Options . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Coulter Toolbar Weight Brackets . . . . . . . . . . . . 21
Coulter Toolbar Brace. . . . . . . . . . . . . . . . . . . . . 21
Depth Channels and Cylinder Stops . . . . . . . . . 22
Clevis-Style Drawbar Adaptor. . . . . . . . . . . . . . . 22
Section 7 Specifications and Capacities . . . . . . . 23
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Tire Inflation Chart . . . . . . . . . . . . . . . . . . . . . . . 24
Torque Values Chart for Common Bolt Sizes . . . 24
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
© Copyright 1999, 2001, 2005, 2008, 2011 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.
The following are trademarks of Great Plains Mfg., Inc.: Application Systems, Ausherman, Land Pride, Great Plains, Seed-Lok
All other brands and product names are trademarks or registered trademarks of their respective holders.
CPH Center Pivot Hitch 148-152M 12/29/2011
Great Plains Manufacturing, Incorporated Trademarks
Printed in the United States of America.
Great Plains Mfg., Inc.
Important Safety Information
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. The signal words are:
!
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.
Keep Riders
Off Machinery
Riders obstruct the operator’s view.
Riders could be struck by foreign
objects or thrown from machine.
▲ Never allow riders on implement.
▲ Never allow children to operate
equipment.
For Your Protection
▲ Thoroughly read and understand
Safety Decals, page 4. Read all
instructions noted on decals.
OFF
Shutdown and Storage
▲ Lower machine to ground, put
tractor in park, turn off engine,
and remove key.
▲ Detach and store implement in an
area where children normally do
not play. Secure implement with
blocks and supports.
Handle
Chemicals Properly
Agricultural chemicals can be dangerous. Improper use can seriously
injure persons, animals, plants, soil
and property.
▲ Wear protective clothing.
▲ Handle all chemicals with care.
▲ Follow instructions on container
label.
▲ Avoid inhaling smoke from any
type of chemical fire.
▲ Store or dispose of unused chem-
icals as specified by chemical
manufacturer.
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CPH Center Pivot Hitch 148-152M
1
Important Safety Information
Great Plains Mfg., Inc.
Use Safety
Lights and Devices
Slow-moving tractors, self-propelled
equipment 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.
Transport
Machinery Safely
Maximum transport speed for implement is 20 mph. Some rough terrains
require a slower speed. Sudden
braking can cause a towed load to
swerve and upset.
▲ 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.
▲ Comply with state and local laws.
▲ Do not tow an implement that,
when fully loaded, weighs more
than 1.5 times the weight of towing vehicle.
Use A Safety Chain
▲ Use a safety chain to help con-
trol drawn machinery should it
separate from tractor drawbar.
▲ Use a chain with a strength rat-
ing equal to or greater than the
gross weight of towed machinery.
▲ Attach chain to tractor drawbar
support or other specified
anchor location. Allow only
enough slack in chain to permit
turning.
▲ Replace chain if any links or end
fittings are broken, stretched or
damaged.
▲ Do not use safety
chain for towing.
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 to ground, put
tractor in park, turn off engine,
and remove key before performing
maintenance.
▲ Allow implement to cool completely.
▲ 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.
CPH Center Pivot Hitch 148-152M 12/29/2011
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Great Plains Mfg., Inc.
Important Safety Information
Prepare for Emergencies
▲ Be prepared if a fire starts.
▲ Keep a first aid kit and fire extin-
guisher handy.
▲ Keep emergency numbers for
doctor, ambulance, hospital and
fire department near phone.
911
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 radio headphones
while operating machinery.
Avoid High
Pressure Fluids Hazard
Escaping fluid under pressure can
penetrate skin, causing serious
injury.
▲ Avoid the hazard by relieving
pressure before disconnecting
hydraulic lines.
▲ Use a piece of paper or card-
board, 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 imme-
diate medical attention from a
physician familiar with this type of
injury.
Safety at All Times
Thoroughly read and understand this
manual before operating implement.
Refer to Safety Decals, page 4. Read
all instructions noted on decals.
▲ Be familiar with all implement
functions.
▲ Operate implement from driver’s
seat only.
▲ Do not leave tractor or implement
unattended with engine running.
▲ Do not dismount a moving tractor.
Dismounting a moving tractor could
cause serious injury or death.
▲ Do not stand between the tractor
and implement 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 raising implement. Make
sure all persons are clear of working area.
▲ Do not turn tractor too tight, caus-
ing implement to ride up on
wheels.
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 to allow 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.
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Important Safety Information
Safety Decals
Your implement comes equipped with all safety decals in place.
They were designed to help you safely operate your implement.
1. Read and follow decal directions.
2. Keep all safety decals clean and legible.
3. Replace all damaged or missing decals. Order new decals
from your Great Plains dealer. Refer to this section for
proper decal placement.
Great Plains Mfg., Inc.
4. When ordering new parts or components, also request corresponding safety decals.
5. To install new decals:
a. Clean the area on which the decal is to be placed.
b. Peel backing from decal. Press firmly on surface,
being careful not to cause air bubbles under decal.
12081
20151
818-188C
Transport Speed Warning
838-265C
Amber Reflector
Reflector on each end of coulter toolbar;
two reflectors total
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Great Plains Mfg., Inc.
Important Safety Information
12082
12080
818-398C
Caution - Tires Not A Step
818-016C
Caution - General Safety Rules
12/29/2011
12080
818-019C
Warning - Negative
Tongue Weight
CPH Center Pivot Hitch 148-152M
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Introduction
Introduction
Great Plains Mfg., Inc.
Great Plains welcomes you to its growing family of new
product owners. This implement 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 center pivot hitch is a pull-type tillage implement designed to tow a Great Plains three-point drill. No-till
coulters are mounted on the hitch. Each coulter is aligned
with a drill opener. The coulters till strips for the drill openers. The hitch has two hydraulic circuits: one for raising
and lowering the coulters and one for raising and lowering
the drill.
Intended Usage
Use the center pivot hitch in no-till field conditions. Use the
hitch only with a Great Plains three-point drill. Do not modify the hitch for use with drills or attachments other than
those specified by Great Plains.
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.
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.
IMPORTANT: A crucial point of information related to
the preceding topic. For safe and correct operation,
read and follow the directions provided before continuing.
NOTE: Useful information related to the preceding topic.
Owner Assistance
If you need customer service or repair parts, contact a
Great Plains dealer. They have trained personnel, repair
parts and equipment specially designed for Great Plains
products.
Your machine’s parts were specially designed and should
only be replaced with Great Plains parts. Always use the
serial and model number when ordering parts from your
Great Plains dealer. The serial-number plate is located as
shown in Figure A.
17135
Figure A
Serial Number
Record your drill model and serial number here for quick
reference:
Model Number: _________________________________
Serial Number: _________________________________
Your Great Plains dealer wants you to be satisfied with
your new machine. If you do not understand any part of
this manual or are not satisfied with the service received,
please take the following actions.
1. Discuss the matter with your dealership service man-
ager. Make sure they are aware of any problems so
they can assist you.
2. If you are still unsatisfied, seek out the owner or gen-
eral manager of the dealership.
3. For further assistance write to:
Product Support
Great Plains Mfg. Inc., Service Department
PO Box 5060
Salina, KS 67402-5060
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Great Plains Mfg., Inc.
Section 1 Preparation and Setup
Section 1 Preparation and Setup
This section will help you prepare your tractor and drill for
use. You must hitch the tractor to the hitch, connect the hydraulics to your tractor, hitch the drill to your hitch, and
bleed the hydraulic systems.
Prestart Checklist
1. Read and understand “Important Safety Information,” page 1.
2. Check that all working parts are moving freely, bolts
are tight, and cotter pins are spread.
3. Check that all grease fittings are in place and lubricated. Refer to Lubrication,“Maintenance and Lubrica-
tion,” page 19.
4. Check that all safety decals and reflectors are correctly located and legible. Replace decals if damaged.
See Safety Decals,“Important Safety Information,”
page 4.
5. Inflate tires to pressure recommended and tighten
wheel bolts as specified. See “Appendix,” page 24
Hitching Tractor to Hitch
!
DANGER!
You may be severely injured or killed by being crushed between
the tractor and drill. Do not stand or place any part of your
body between drill and moving tractor. Stop tractor engine and
set park brake before installing the hitch bolt.
1. Place hitch weldment (1) over ball swivel (2) on hitch
tongue. Hold hitch weldment in place by inserting
spacer tube (3) through hitch clevis and ball swivel.
2. Back tractor up to hitch and bolt hitch weldment to
tractor drawbar using 1-by-10-inch bolt (4), large flat
washer (5), lock washer (6), and nut (7).
3. Use 3/4-by-9-inch bolt (8) to bolt hitch weldment
through its slotted hole and onto secondary hole of
tractor drawbar. Install a 3/4-inch flat washer (9) next
to top slotted hole and fasten with a lock washer (10)
and nut (11). Tighten both bolts.
17215
Figure 1-1
Drawbar Assembly Illustration
4. Securely attach safety chain to tractor-drawbar frame.
5. Remove jack from stob on side of hitch tongue and
place in transport position on frame brace. See Figure
1-2.
12083
Figure 1-2
Jack in Transport
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