Page 1
Table of Contents Index
Series VIII 8321, 8324, 8326, 8328,
8333, 8537, 8544, 8548 & 8552
Operator Manual
Discovator (Disc & Coulter)
Manufacturing, Inc.
www.greatplainsmfg.com
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!
41419
Illustrations may show optional equipment not supplied with standard unit.
ORIGINAL INSTRUCTIONS
© Copyright 2014 Printed 2014-02-12 550-353M
Table of Contents Index
EN
Page 2
Table of Contents Index
Table of Contents Index
Page 3
Great Plains Manufacturing, Inc. Cover Index iii
Table of Contents
Important Safety Information ...................................... 1
Safety Decals ................................................................. 5
Introduction ...............................................................10
Models Covered ........................................................... 10
Description of Unit ........................................................10
Document Family......................................................10
Using This Manual........................................................10
Definitions................................................................. 10
Owner Assistance ........................................................11
Preparation and Setup ...............................................12
Prior to Going to the Field Checklist.............................12
Hitching Tractor to Discovator ......................................13
Hydraulic Hose Hookup............................................ 14
Hose Handles...........................................................14
First Time Field Adjustments........................................14
Pre-Leveling of Machine.......................................14
Front to Rear Leveling..............................................14
Side to Side Leveling............................................15
Disc Gang Depth Calibration....................................15
Field Operation of Disc Gangs .................................16
Operating Instructions...............................................17
Pre-Start Checklist .......................................................17
Transporting................................................................. 17
Check Tractor Capacity and Configuration .............. 17
Transport Checklist .................................................. 17
General Operation and In-Field Adjustments............... 18
Scraper Settings .......................................................... 18
Rear Attachment Settings ............................................ 18
Spike Drag Settings ................................................. 18
HD Spike & Reel Settings ........................................ 19
Coil Tine Settings ..................................................... 19
Reel Settings............................................................19
Maintenance and Lubrication ................................... 20
Maintenance ................................................................ 20
Lubrication ................................................................... 20
Troubleshooting......................................................... 22
Discovator Trouble Shooting Charts ............................ 22
Appendix..................................................................... 26
DV Specifications and Capacities ................................ 26
Tire Inflation and Warranty........................................... 26
Hydraulic Connectors and Torque ............................... 27
Torque Values Chart.................................................... 28
Warranty ...................................................................... 29
Index............................................................................ 31
© Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 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.
2014-02-12 550-353M
Trademarks of Great Plains Manufacturing, Inc. include: Singulator Plus, Swath Command, Terra-Tine.
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, Verti-Till, Whirlfilter, 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
Page 4
8321-8552DV Table of Contents Index
550-353M Table of Contents Index 2014-02-12
Page 5
Great Plains Manufacturing, Inc. 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.
Be Familiar with Safety Decals
▲ Read and understand “Safety Decals” on page 5, thor-
oughly.
▲ Read all instructions noted on the decals.
▲ Keep decals clean. Replace damaged, faded and illegible
decals.
2014-02-12 550-353M
Page 6
2 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
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 hear-
ing 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.
Handle Chemicals Properly
Agricultural chemicals can be dangerous. Improper use
can seriously injure persons, animals, plants, soil and
property.
▲ Read and follow chemical manufacturer’s instructions.
▲ Wear protective clothing.
▲ Handle all chemicals with care.
▲ Avoid inhaling smoke from any type of chemical fire.
▲ Store or dispose of unused chemicals as specified by chemi-
cal manufacturer.
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 driv-
ing on public roads.
▲ Use lights and devices provided with implement
550-353M 2014-02-12
Page 7
Great Plains Manufacturing, Inc. Table of Contents Index Important Safety Information 3
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.
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 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.
▲ Carry reflectors or flags to mark Discovator in case of
breakdown on the road.
▲ Keep clear of overhead power lines and other obstructions
when transporting. Refer to transport dimensions under
“DV Specifications and Capacities” on page 26.
▲ Do not fold or unfold the Discovator while the tractor is
moving
Shutdown and Storage
▲ Lower Discovator, put tractor in park, turn off engine, and
remove the key.
▲ Secure Discovator using blocks and supports provided.
▲ Detach and store machine in an area where children nor-
mally do not play.
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.
2014-02-12 550-353M
Page 8
4 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
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 the machine, put tractor in park, turn off engine,
and remove key before performing maintenance.
▲ Disconnect battery ground cable (-) before servicing or
adjusting electrical systems or before welding on machine.
▲ 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 machine 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 machine functions.
▲ Operate machinery from the driver’s seat only.
▲ Do not leave Discovator unattended with tractor engine
running.
▲ Do not stand between the tractor and machine during hitch-
ing.
▲ Keep hands, feet and clothing away from power-driven
parts.
▲ Wear snug-fitting clothing to avoid entanglement with mov-
ing parts.
▲ Watch out for wires, trees, etc., when folding and raising
machine. Make sure all persons are clear of working area.
550-353M 2014-02-12
Page 9
Great Plains Manufacturing, Inc. Table of Contents Index Important Safety Information 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 cor-
responding 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 the back of the center frame centered between
plates;
1 total
838-615C
Amber Reflectors
Two on light bracket and two on center brace bar. Two on
center frame.Two on rear of finishing attachment (not
shown), visible from side while folded for transport;
8 total
40906_100%
.tif
600 dpi
40907_100%
2014-02-12 550-353M
Page 10
6 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
.eps
838-614C
Red Reflectors
On rear of light brackets (top);.
2 total
41424_58%
838-603C
Orange Reflectors
On rear of light brackets (bottom);
2 total
838-598C Caution: Read Operator’s Manual
On front of hitch;
1 total
.eps
41424_57%
40905_95%
550-353M 2014-02-12
Page 11
Great Plains Manufacturing, Inc. Table of Contents Index Important Safety Information 7
838-599C Danger: Electrocution Hazard
Front side of center wing brace (left, middle side);
1 total
.eps
40909_94%
838-600C Danger: Crushing Hazard
On front (middle) of hitch;
1 total
838-602C Warning: Overhead Wing Hazard
On outside center of center and wing frames (both
sides);
4 total 8321,8324, 8326, 8328 & 8333
6 total 8537, 8544, 8548 & 8552
40905_95%
40911_95%
.eps
2014-02-12 550-353M
Page 12
8 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
838-094C Warning: High Pressure Fluid
Front side of center wing brace (right, middle side);
1 total
.tif
600 dpi
40909_100%
838-611C Warning: Hand Crushing
Front side of center wing brace (left & right side);
2 total
838-613C Notice: Transport Lock
On outside center of center frame (both sides);
2 total
.eps
40909_100%
.eps
40911_95%
550-353M 2014-02-12
Page 13
Great Plains Manufacturing, Inc. Table of Contents Index Important Safety Information 9
.eps
838-612C Warning: Wings Could Fall Suddenly
On front of wing stop (both sides);
2 total
40910_100%
838-890C Caution: Tire Pressure and Torque
On rim of each center transport wheel
Models 8548 & 8552;
4 total
WARNING
EXCESSIVE SPEED HAZARD
To Prevent Serious Injury or Death:
Do Not exceed 20 mph maximum transport
speed. Loss of vehicle control and/or machine
can result.
818-188C Rev. C
40907_100%
818-188C Warning: Speed
On front (middle) of hitch;
1 total
2014-02-12 550-353M
40905_95%
Page 14
10 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
Introduction
Great Plains welcomes you to our growing family of new
product owners. The Series VIII Discovator, DV (Disc &
Coulter) 8321-8552DV have 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.
Models Covered
8321DV 21-Foot 3-section
8324DV 24-Foot 3-section
8326DV 26-Foot 3-section
8328DV 28-Foot 3-section
8333DV 33-Foot 3-section
8537DV 37-Foot 5-section
8544DV 44-Foot 5-section
8548DV 48-Foot 5-section
8552DV 52-Foot 5-section
R
L
Figure 1
8321DV Discovator
F
R
U
B
L
D
41642
Description of Unit
The Series VIII Discovator, DV (Disc & Coulter) 83218552DV is a three or five-section field finishing, one-pass
tillage tool. Working width ranges from 21 to 52 feet. The
implement is designed to combine discing/slicing, cultivating, harrowing and herbicide incorporation in a single
pass. Various finishing attachments are available to customize your tillage and residue requirements for your
operation.
Document Family
550-353E Assembly Manual
550-353Q Pre-Delivery Manual
550-353M Operator Manual (this document)
550-353P Parts Manual
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.
Note: 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.
F
R
U
B
L
D
550-353M 2014-02-12
Page 15
Great Plains Manufacturing, Inc. Table of Contents Index Introduction 11
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.
Refer to Figure 2
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 on the left end of the top front tool bar.
Record your 8315/8318/8321/8324DVN Discovator
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
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.
Figure 2
Serial Number Plate
For further assistance write to:
Product Support
Great Plains Mfg. Inc., Service Department
PO Box 5060
Salina, KS 67402-5060
41134
(800)255-9215
2014-02-12 550-353M
Page 16
12 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
Preparation and Setup
This section helps you prepare your tractor and 83218552DV Discovator for use, and covers tasks that need to
be done seasonally, or when the tractor/Discovator configuration changes.
Before using the Discovator in the field, you must hitch it
to a suitable tractor, inspect systems and level the Discovator. Before using the Discovator for the first time, and
periodically thereafter, certain adjustments and calibrations are required.
Prior to Going to the Field Checklist
Complete this checklist before routine setup:
❑ Read and understand “Important Safety Informa-
tion” on page 1.
❑ Check that all working parts are moving freely, bolts
are tight, and cotter pins are spread.
❑ Make sure your tractor horsepower matches the
implement you are pulling. This is important so the
implement can do the best possible job.
❑ Clean all hydraulic couplings and connect to tractor
as shown on page 13 and 14.
❑ If machine is folded, remove the transport pins from
wing stops. (DO NOT remove pins if the wing is leaning against the pins or putting pressure on the pins.
Use the hydraulics to pull the wings in completely
before unpinning them.) Once the pins are removed,
slowly untold the unit. Make sure no one is under the
wings during the unfolding process.
❑ Check again for hydraulic leaks and watch that
hoses do not get pinched in hinges, wing stops, etc.
❑ After the machine is completely unfolded, raise and
lower the Discovator several times to purge air from
the hydraulic system. Again check for hydraulic leaks
and tighten or replace if necessary.
❑ Check safety chain hookup. Make sure all warning
lights are hooked up and functioning correctly.
❑ Check that all grease fittings are in place and lubri-
cated. See “Lubrication” on page 20. The hubs will
come pre-greased and will not need greased at this
time.
❑ Check that all safety decals and reflectors are cor-
rectly 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 and
Warranty” on page 26.
❑ Put transport locks in place and refold the machine
slowly. Put wing stop pins in place. Always use the
transport pins when moving from field to field. You
are now ready to go to the field.
550-353M 2014-02-12
Page 17
Great Plains Manufacturing, Inc. Table of Contents Index Preparation and Setup 13
Hitching Tractor to Discovator
Crushing Hazard:
Do not stand or place any body part between Discovator and
moving tractor. You may be severely injured or killed by
being crushed between the tractor and Discovator. Stop
tractor engine and set parking brake before attaching cables
and hoses.
To prevent soil compaction on rows, set tractor wheels
between rows. For hillsides and steep slopes, set tractor wheels as wide as possible for maximum stability.
1. Raise tractor three-point arms (if equipped) clear
up to clear Discovator.
2. For TWO-WHEEL DRIVE and MFWD tractors, pin
drawbar in fixed center position for field and transport. For FOUR-WHEEL DRIVE and TRAC-DRIVE
tractors, leave one hole clearance on each side of
drawbar for field position, hitch damage may occur
if pinned solid. Pin in center position for transport to
maintain maximum steering control.
3. Hitch the tractor to the Discovator using the block
or yoke clevis determined by the tractor drawbar.
Use the correct size pin for clevis or block.
Load Sway Hazard:
Lock drawbar swing to center position to minimize any sideto-side sway to assure proper tracking in the field, and safe
road travel. See “Transporting” on page 17, for safe
transporting
Refer to Figure 3
4. Use jack to raise and lower Discovator tongue.
Refer to Figure 4
5. After hitching tractor to Discovator, store jack on
storage tube on side of Discovator tongue.
6. Secure Discovator safety chain to an anchor on the
tractor capable of pulling the unit.
1
2
1
Figure 3
Tongue on Jack
41643
2
Figure 4
Jack in Storage
2014-02-12 550-353M
41644
Page 18
14 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
Hydraulic Hose Hookup
Great Plains hydraulic hoses are color coded to help you
hookup hoses to your tractor outlets. Hoses that go to the
same remote valve are marked with the same color.
Color Hydraulic Function
Black Lift (2 hoses)
Green Fold (2 hoses)
Red Gang (2 hoses)
Refer to Figure 5
High Pressure Fluid Hazard:
Relieve pressure before disconnecting hydraulic lines. Use
paper or cardboard, NOT BODY PARTS, to check for leaks.
Wear protective gloves and safety glasses or goggles when
working with hydraulic systems. 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.
Only trained personnel should work on system hydraulics.
Hose Handles
To distinguish hoses on the same hydraulic circuit, refer
to, “Hydraulic Hose Hookup” on page 14. The hose
under an extended symbol feeds a cylinder base end.
The hose under a retracted-cylinder symbol feeds a cylinder rod end.
Clean all hydraulic couplings and hook hoses to tractor.
First Time Field Adjustments
Pre-Leveling of Machine
Figure 5
Hose Handles
25463
Front to Rear Leveling
Refer to Figure 6
1. Pre-leveling of machine can be done on a concrete
slab or level surface. Lower machine so sweeps are
2-3” off of ground on the center frame. Adjust turnbuckle at the front of machine to level it from front to
back. (Shorten to bring front down, extend to bring
front up). Level machine with the front row just
slightly deeper or lower than the back.
.eps
95%
550-353M 2014-02-12
Hitch Turnbuckle Adjustment
Figure 6
41598
Page 19
Great Plains Manufacturing, Inc. Table of Contents Index Preparation and Setup 15
Side to Side Leveling
Refer to Figure 7
2. Set the wings to match the depth of the center. This is
done by adjusting the lift cylinder eyebolt on each wing.
Lengthen the bolt to run shallower, shorten the bolt to
run deeper.
Refer to Figure 8
Disc Gang Depth Calibration
3. Be sure the pre-load is set at 8 3/4” on the spring
assemblies. Calibrate the depth gauge pointer by
extending cylinder until the under frame clearance of
the 20” blades is 4 1/2”. Place the decal on the stand
with the pointer at ‘0’.
Figure 7
Wing Depth Adjustment
Figure 8
Disc Gang Depth Gauge Calibration
40221
41599
2014-02-12 550-353M
Page 20
16 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
Refer to Figure 9
Field Operation of Disc Gangs
4. Adjust the disc or coulter gangs to run 1/2” to 1” shallower than the cultivator sweeps by using the gang cylinders. The pointer on the gauge should read +1/2” to
+1”. Running the disc gangs slightly above the sweeps
allows the sweeps to work in firm ground which
improves trash flow and incorporation as well as leaving
a smoother, more level seed bed.
5. Do not run the disc or coulter gangs in the RED ZONE.
Running the disc gangs too deep will cause plugging of
trash as well as excessive wear on the gangs, gang
springs and Discovator frame. Running disc gangs too
deep may also tend to hold the front of the entire
machine out of the ground. (The disc gangs should only
be run in the RED ZONE when using 18” blades that
are nearing the end of their wear life).
Refer to Figure 10
6. You are ready to operate the machine in the field at this
point. You should have someone observe the machine
during operation for levelness, front to rear and side to
side. When you lower the machine to the desired working depth, set the depth stop at the front of machine
1
to ensure the unit will operate at a consistent depth
every pass. After setting the stop, if a change of depth is
desired, 1 full turn of the handle either in or out will
2
change the depth approximately 1/4” up or down
respectively.
7. Make any fine tuning adjustments on the leveling of the
machine.
.eps
100%
Figure 9
Disc Gang Field Operation
41600
1
2
.eps
100%
550-353M 2014-02-12
Figure 10
Depth Stop Adjustment
42339
Page 21
Great Plains Manufacturing, Inc. Table of Contents Index 17
Operating Instructions
This section covers general operating procedures. Experience, machine familiarity, and the following information
will lead to efficient operation and good working habits.
Always operate farm machinery with safety in mind.
Pre-Start Checklist
Perform the following steps before transporting the 8315/
8318/8321/8324DVN Discovator to the field.
❑ Carefully read “Important Safety Information” on
page 1.
❑ Lubricate Discovator as indicated under “Lubrica-
tion” on page 20.
❑ Check all tires for proper inflation.
❑ Check all bolts, pins, and fasteners. Torque as shown
in “Torque Values Chart” on page 28.
❑ Check Discovator for worn or damaged parts. Repair
or replace parts before going to the field.
❑ Check hydraulic hoses, fittings, and cylinders for
leaks. Repair or replace before going to the field.
High Pressure Fluid Hazard:
Relieve pressure and shut down tractor before connecting, disconnecting or checking hydraulic lines. Use a piece of paper
or cardboard, NOT BODY PARTS, to check for leaks. Wear
protective gloves and safety glasses or goggles when working
with hydraulic systems. 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.
Transporting
See “Hitching Tractor to Discovator” on page 13 before
transporting the Discovator.
Check Tractor Capacity and Configuration
• Know the weight of your Discovator (see table on speciation page).
• Consult your tractor manual for 3-point limitations.
• Add weights to tractor as required.
• When determining the weight of your Discovator, be
sure to include the weight of any options.
Transport Checklist
❑ Plan the route. Avoid steep hills. Keep Clearances in
mind.
❑ Make all electrical and hydraulic connections. See
“Hitching Tractor to Discovator” on page 13.
❑ Raise Discovator.
❑ Be sure all transport locks are installed.
❑ Always have lights on for highway operation.
❑ Comply with all federal, state and local safety laws
when traveling on public roads.
❑ Travel with caution. Allow safe clearance.
Remember that the Discovator is wider than the tractor.
Loss of Control Hazard:
Use a tractor rated for the load. Add tractor ballast as needed.
Do not exceed 20 mph. Towing the Discovator with a vehicle
that is not adequate, or at high speeds, could lead to loss of
vehicle control. Loss of vehicle control can result in a serious
road accident, severe injury or death. Check that your tractor
has enough power to handle the weight of the Discovator. Refer
to your tractor’s operator manual for capacities and ballast
requirements.
2014-02-12 550-353M
Page 22
18 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
3
General Operation and In-Field Adjustments
1. Remove the transport pins and unfold machine.
Make sure the fold cylinders are fully extended to
allow the wings to fully flex in the field.
2. If possible have someone observe the machine during first time operation for levelness, front to rear and
wings to center frame. Adjust each as needed. For
front to rear, either extend or shorten the length of
the turnbuckle on the self-leveler. Never run the
machine with the back lower (deeper) than the front.
To adjust the machine from side to side, use the eyebolt on each wing, See “First Time Field Adjust-
ments” on page 14. The gauge wheels (if equipped)
should be set in field position to be 1/2” to 1 1/2” off
the ground.
3. The ideal working speed for the Discovator is 5 1/2 to
6 1/2 mph. Working too slow may cause plugging,
poor incorporation or mixing of crop residue and
reduced weed kill. Running too fast may cause
streaks in chemical incorporation and ridging.
Scraper Settings
The scrapers are set at the factory but should be
checked periodically and may need re-adjusted as follows:
• Disc scrapers will need the bolts (rigid scraper) or u-
bolts (spring scraper) loosened up and slid into blade
until they just touch the blade, and torqued to specs.
4. The Discovator is designed as a secondary tillage
tool and is designed to leave a finished seedbed following some form of fall or spring tillage. For best
results, if at all possible, run the machine at a slight
angle of the rows. This will improve trash flow and
help spread the residue more evenly throughout the
field.
5. When you have the machine set to the desired working depth, set the depth stop slide on the depth control bar. This is located at the front of the machine on
the brace bar. This will maintain a constant depth
each time after raising and lowering the machine.
6. If after setting the depth stop, the detent on the tractor kicks out before the stop contacts the button on
the depth stop, slow the hydraulic flow speed down.
If the problem persists, contact the factory service
representative for the possible adjustments. Do not
try the rebound valve without first contacting the factory service rep.
7. Adjust the drag to leave the desired results while
maintaining the trash flow through the drag.
• Coulter scrapers u-bolts will need loosened and scrap-
ers centered between coulter blades, and torqued to
specs.
Rear Attachment Settings
Spike Drag Settings
Refer to Figure 11
8. On the spike drag, start with 5 links hanging from the
chain in drag arm bottom slot. (This is the starting point
for worst conditions). The cleaner the ground, the shorter
the pull chain may be pulled up. On the spike drag, one
of the links in the first row of angles is turned over. This
allows the trash to start flowing through the drag easier
by changing the angle of the first row of teeth. Always
make sure that the drag is never pulling off of the hang
chains. If so, shorten pull chains.
Figure 11
Spike Drag Settings
550-353M 2014-02-12
412
Page 23
Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 19
HD Spike & Reel Settings
Refer to Figure 12
9. On the hd spike drag, start with 5 links hanging from the
chain in drag arm bottom slot. (This is the starting
1
point for worst conditions). The cleaner the ground, the
shorter the pull chain may be pulled up. Always make
sure that the drag is never pulling off of the hang chains
. If so, shorten pull chains.
2
10. Adjust nut to where spring is just making contact
with front plate .
11. Turn nut another 1” further on spring rod to set preload on spring .
12. Lengthen turnbuckle to adjust front mini shank to
run more aggressive and shorten to run more passive.
13. Be sure the fold catch assembly is aligned 3 7/8” from
back of rear angle iron of fold catch to rear of arm as
shown.
3 4
5
3 6
4
7 8
9
1
5
7
4
3
6
8
2
9
Coil Tine Settings
Refer to Figure 13
14. On coil tine drags start with the top eyebolt centered.
Then level drag mainframe by changing position of
leveling bolts . There are two holes in the arm and four
in the mainframe. One of these will get you where you
need to be to be level. To lay teeth back, remove the clip
pin on each end and move strap adjustment by push-
4
ing the handle forward. The strap has 5 holes that will
let you lay the teeth back several degrees. If it is desired
to set one row, usually the first, different than the rest as
far as the angle is concerned, it can be adjusted individually by loosening the u-bolt and set-screw on each end
of the drag bar. Down pressure on the drag is achieved
by lengthening the eyebolt on the top bracket.
Depending on the amount of down pressure, you may
need to re-level the mainframe.
3
5
2
1
1
Reel Settings
15. If a reel is added, adjust the amount of down pressure by
either shortening the eyebolt for less pressure or lengthening for more pressure.
Figure 12
HD Spike & Reel Settings
3
42219
5
1
2
3
4
Figure 13
Coil Tine Settings
42337
2014-02-12 550-353M
Page 24
20 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
Maintenance and Lubrication
Maintenance
1. Always use the transport lock when working on or
doing maintenance to the Discovator. If folded, be
sure your wing stop pins are in place. Read and
understand all safety decals on your equipment.
2. During the first season of operation, and periodically
after that, check your bolts for tightness. Check
shank pivot bolts for tightness. Check shank pivot
bolts on the spring-loaded shank, these must remain
tight to prevent excessive wear on the shank assembly.
3. Replace or rotate worn parts as needed -- hinge
bolts, clevis pins, bearings, sweeps, shanks, etc.
Boron disc blades cannot be rolled to be sharpened,
they must be ground. Cracks and breakage will
occur if rolled.
4. Check and tighten or replace any hydraulic leaks.
Check hoses for any leaks. It is important that there
are no leaks on the equipment.
5. Grease wheel bearings and walking beams sparingly. Over greasing may cause damage to seals and
reduce the life of the bearing. Grease hinge points
periodically.
6. Check drag bolts for loosness or excessive wear.
Replace broken or bent teeth. Your drag is an important part of the tillage operation.
7. If machine is stored outdoors over the winter months,
it is a good idea to fold the machine then set it down
on the ground so all the cylinders are retracted to
protect the cylinder rods. This will extend the life of
the cylinder seals and reduce internal and external
leaks.
By following and maintaining a routine service and lubrication program, your tillage equipment will give you
many years of service.
For the most current manual information, visit Great
Plains website listed below. For more information on
operating, adjusting or maintaining your Great
Plains Discovator, assistance is available. Contact:
Product Support
Great Plains Mfg. Inc., Service Department
PO Box 5060
Salina, KS 67402-5060
(800)255-9215
Lubrication
Multipurpose
spray lube
Wheel Bearing Hub
Multipurpose
grease lube
Multipurpose
oil lube
100%
Intervals (service hours)
at which lubrication is
50
required
50
1 zerk on each hub;
4 total
Type of Lubrication: Grease
Quantity: Sparingly, Do Not Over Grease, may cause damage
seal.
Repack wheel bearings annually or every 2500 acres.
550-353M 2014-02-12
41622
Page 25
Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 21
Inside Wing Hinge Points
10
On all inside wing hinge points
Type of Lubrication: Grease
Quantity: Until grease emerges
42335
Outside Wing Hinge Points
10
On all outside hinge points
Type of Lubrication: Grease
Quantity: Until grease emerges
Walking Beam Pivot Bearings
100
One on each walking beam
Type of Lubrication: Grease
Quantity: Sparingly and check for endplay
If there is a lot of end play take apart, check bearings
and re-pack
52336
.eps
41641
2014-02-12 550-353M
Page 26
22 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
Troubleshooting
Discovator Trouble Shooting Charts
General Performance
Problem Cause Solution
Rear
Shanks
Leaving
Groove
Leaving
Ridges On
The Outside
Wings Not
Penetrating
One Wing
Running
Deeper
Than The
Other
Both Wings
Running
Too Deep
Whole
Machine
Runs
Deeper
Rear of machine running too deep.
Coulter/disc gangs too deep.
Drag set incorrectly.
Operating machine too fast.
Wings not level.
Lift cylinders out of phase.
Leaking wing lift cylinder.
Drag set Incorrectly.
Operating machine too fast.
Wings not level.
Coulter/disc gangs too deep.
Wing gangs deeper than center gangs.
Fold cylinder nor fully extended.
Wings not level.
Leaking wing lift cylinder.
Wing cylinder in wrong sequence.
Improper tire pressure.
Wings not level.
Improper tire pressure.
Leaking depth stop cartridge.
Leaking master lift cylinder.
Level machine from front to rear with turnbuckle, See
“Pre-Leveling of Machine” on page 14
Raise disc gangs.
Reset drag, See “Rear Attachment Settings” on
page 18.
Slow down (6-7 m/h)/(9-11 km/h).
Adjust eyebolt at rear of wing cylinders to level wings.
See “Side to Side Leveling” on page 15.
Rephase lift cylinders.
Repair or replace leaky cylinder, See pages 34-37 of
“Parts Manual”.
Reset drag, See “Rear Attachment Settings” on
page 18.
Slow down (6-7 m/h)/(9-11 km/h)
Adjust eyebolt at rear of wing cylinders to level wings.
See “Side to Side Leveling” on page 15.
Raise disc gangs.
Rephase gang circuit.
Fully extend cylinders.
Adjust eyebolt at rear of wing cylinders to level wings.
See “Side to Side Leveling” on page 15.
Repair or replace leaky cylinder, See pages 34-37 of
“Parts Manual”.
Repair or replace leaky cylinder, See pages 26-27 of
“Parts Manual”.
Set air pressure, See “Tire Inflation and Warranty”on
page 26.
Adjust eyebolt at rear of wing cylinders to level wings.
See “Side to Side Leveling” on page 15.
Set air pressure, See “Tire Inflation and Warranty”on
page 26.
Replace cartridge.
Repair or replace leaky cylinder, See pages 26-27 of
“Parts Manual”.
Center &
One Wing
Leaking master lift cylinder. Repair or replace leaky cylinder, See pages 26-27 of
“Parts Manual”.
Run Deeper
550-353M 2014-02-12
Page 27
Great Plains Manufacturing, Inc. Table of Contents Index Troubleshooting 23
General Performance
Problem Cause Solution
Machine
Plugging
Machine
Bouncing
Uneven
Working
Depth
Overheatin
g Hydraulic
System
Coulter/disc gangs running deeper than
sweeps.
Machine not level front to back.
Too much residue in the rows.
Disc gangs not cutting residue.
Improperly spaced shanks.
Running too low.
Ground too wet.
Operating speed too fast. Slow down (6-7 m/h)/(9-11 km/h).
Lift cylinders out of phase.
Timed detent not set correctly.
Timed detent not allowing depth stop to
engage.
Flow set to continuous. Disengage continuous flow.
Raise coulter/disc gangs.
Level machine front to rear with turnbuckle, See “Front
to Rear Leveling” on page 14.
Run at a slight angle to the rows.
Check for sharpness.
Check shank layout for proper shank placement.
Speed up (6-7 m/h)/(9-11 km/h).
Allow ground to dry some.
Rephase (See Operators Manual).
Set flow for 0.5 after machine is raised.
Adjust detent timer to allow for depth stop to engage.
Coulter/Disc Gang Performance
Problem Cause Solution
Coulter/
Disc Blades
Do Not Penetrate
Coulter/
Disc Gangs
Are
Plugging
Entire
Blades too dull.
Improper spring preload.
Scrapers are not set properly.
Gangs are running too shallow.
Ground too wet.
Gang circuit leak in tractor Completely extend/re phase cylinders periodically.
Sharpen blades (if applicable).
Raise disc gangs.
Reset spring preload, See “Disc Gang Depth Calibra-
tion” on page 15.
Set scraper according to specs, See “Scraper Set-
tings” on page 18.
Increase gang depth or raise completely.
Fix leaking gang cylinder, See pages 30-31 of “Parts
Manual”.
Allow ground to dry some.
Coulter/
Disc Gang
Depth
Changes
Wing
Coulter/
Leaking slave cylinder on same side as
wing.
Repair or replace leaky cylinder, See pages 30-31 of
“Parts Manual”.
Disc Gangs
Coming Out
Of Ground
2014-02-12 550-353M
Page 28
24 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
Coulter/Disc Gang Performance
Problem Cause Solution
Center
Gang
Leaking master cylinder opposite of the wing
gang section.
Repair or replace leaky cylinder, See pages 26-27 of
“Parts Manual”.
Section &
One Wing
Gang
Section
Sweep/Shank Performance
Problem Cause Solution
Uneven
Sweep
Depth
Across
Working
Width
Sweep’s
Front
Wearing
Faster Than
Rear
Wings not level.
Leaking lift cylinder.
Improper tire pressure.
Machine nose down front to rear. Level machine front to rear with turnbuckle, See “Front
Adjust eyebolt at rear of wing cylinders to level wings.
See “Side to Side Leveling” on page 15.
Repair or replace leaky cylinder, See pages 26-27 of
“Parts Manual”.
Set air pressure, See “Tire Inflation and Warranty”on
page 26
to Rear Leveling” on page 14.
Sweep’s
Rear
Wearing
Faster Than
Front
Magnum
Shank
Excessive
Wear In
Pivot Bolt
Twisted KFlex
Opening Kflex Shank
Bottom Cshank
Bending
Machine nose up front to rear. Level machine front to rear with turnbuckle, See “Front
to Rear Leveling” on page 14.
Loose pivot bolt. Tighten pivot bolt, See pages 40-41 of “Parts Manual”.
Turning while machine in the ground. Raise the machine out of the ground when turning.
Turning while in the ground.
Backing up while in the ground.
Running too deep/fast.
Improper shank.
Raise the machine out of the ground.
Raise the machine out of the ground.
Reduce working depth/speed.
Switch to Magnum Shank
550-353M 2014-02-12
Page 29
Great Plains Manufacturing, Inc. Table of Contents Index Troubleshooting 25
Transport
Problem Cause Solution
Wings Fail
to Unfold
Wings Fail
To Fold
Folds/
Unfolds Too
Slow
Folds/
Unfolds Too
Fast
Lift Circuit
immobilized
Lift Will Not
Go Down
Machine
Bouncing
During
Transport
Hydraulic hose disconnected.
Failed hydraulic hose tip.
Transport locks engaged.
Hydraulic hose disconnected.
Failed hydraulic hose tip.
Low hydraulic pressure.
Failed hydraulic hose tip. Replace tip.
Cylinder orifice removed. Replace orifice in cylinder ports.
Rebound valve locked. See dealer.
Transport locks engaged.
Depth stop engaging.
Failed poppet valve in depth stop.
Depth stop failing due to hose routing.
Excessive speed. Slow down (18 m/h)/(30 km/h).
Connect hydraulic hose.
Replace tip.
Disengage transport locks.
Connect hydraulic hose.
Replace tip.
Increase pressure to be>1500psi (10.3x10^6 Pa).
Disengage transport locks.
Readjust depth stop.
Replace poppet valve in depth stop.
Check routing with hydraulic layout, “Pre-Delivery
Manual”.
2014-02-12 550-353M
Page 30
26 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
Appendix
DV Specifications and Capacities
Model No. 8321DV 8324DV 8326DV 8328DV 8333DV
Sweep Width 20' 7" (6.26 m) 24' 1" (7.35 m) 26' 4" (8.04 m) 28' 9" (8.76 m) 33' 5" (10.2 m)
Coulter/Disc Width 20' (6.09 m) 23' 9" (7.28 m) 25' 3" (7.70 m) 28' (8.53 m) 32' (9.75 m)
Number of Sweeps 35 41 45 49 57
Number of Coulter/Disc 30 36 38 42 48
Center Section 9' 9" (2.97 m) 9' 9" (2.97 m) 9' 9" (2.97 m) 9' 9" (2.97 m) 12' (3.66)
Wing 5' 6" (1.68 m) 7' 6" (2.29 m) 8' 6" (2.59 m) 9' 6" (2.90 m) 10' 6" (3.2 m)
Transport Width 14' (4.27 m) 14' (4.27 m) 14' (4.27 m) 14' (4.27 m) 16' 1" (4.90 m)
Transport Height 9' 3" (2.82 m) 10' 9" (3.28 m) 12' (3.66 m) 13' 3" (4.04 m) 14' 3" (4.34 m)
Weight 8925 lb (4048 kg) 10200 lb (4626 kg) 11050 lb (5012 kg) 11890 lb (5393 kg) 14025 lb (6361 kg)
Tire Size Center 9.5 LX15 8 PLY 9.5 LX15 8 PLY 11L-15SL 12 PLY 11L-15SL 12 PLY 11L-15SL 12 PLY
Tire Size Wing 9.5 LX15 8 PLY 9.5 LX15 8 PLY 9.5 LX15 8 PLY 9.5 LX15 8 PLY 9.5 LX15 8 PLY
Horsepower 125-175 160-210 200-250 225-275 250-300
Kilowatt 93-130 119-156 149-186 167-205 186-223
Model No. 8537DV 8544DV 8548DV 8552DV
Sweep Width 36' 11" (11.25 m) 43' 11" (13.4 m) 47' 5" (14.47 m) 52' 1" (15.86 m)
Coulter/Disc Width 36' (10.97 m) 42' 9" (13.03 m) 46' 6" (14.17 m) 50' 9" (15.47 m)
Number of Sweeps 63 75 81 89
Number of Coulter/Disc 54 64 70 76
Center Section 9' 9" (2.97 m) 9' 9" (2.97 m) 12' (3.66) 12' (3.66)
1st Wing 8' 6" (2.59 m) 9' 6" (2.90 m) 10' 9" (3.28 m) 10' 9" (3.28 m)
2nd Wing 5' (1.52 m) 7' 3" (2.21 m) 7' (2.13 m) 9' 3" (2.82 m)
Transport Width 15' (4.57 m) 15' (4.57 m) 18' 3" (5.56 m) 18' 3" (5.56 m)
Transport Height 12' 6" (3.81 m) 13' 3" (4.04 m) 14' 9" (4.50 m) 14' 9" (4.50 m)
Weight 15392 lb (6981 kg) 18320 lb (8309 kg) 19968 lb (9057 kg) 21632 lb (9812 kg)
Tire Size Center 11LX15 LOAD F 12.5LX15 LOAD F 12.5LX16.5/G 12.5LX16.5/G
Tire Size Wings 9.5 LX15 8 PLY 9.5 LX15 8 PLY 9.5 LX15 8 PLY 9.5 LX15 8 PLY
Horsepower 280-340 320-380 340-400 375+
Kilowatt 208-253 238-283 340-298 279+
Weight can vary by hundreds of pounds depending on options installed.
Wheel Bolt Torque Values 1/2”-20 (75-85 ft-lbs) 9/16”-18 (80-90 ft-lbs) 5/8”-18 (85-100 ft-lbs)
Tire Inflation and Warranty
Tire Inflation Chart
Wheel Tire Size Inflation
Gauge
Wheel
Gauge
Wheel
Transport/
Wings
Transport/
Center
550-353M 2014-02-12
6.70L-15” 4-ply
7.50x10” 10-ply
9.5L-15” 8-Ply
11L x 15SL 12-Ply
32psi
(221 kPa)
80 psi
(552 kPa)
44psi
(303 kPa)
52 psi
(359 kPa)
All tires are warranted by the original manufacturer of the tire.
Tire warranty information is found in the brochures included with
your Operator’s and Parts Manuals or online at the manufacturer’s web sites listed below. For assistance or information, contact your nearest Authorized Farm Tire Retailer.
Manufacturer Web site
Firestone www.firestoneag.com
Gleason www.gleasonwheel.com
Titan www.titan-intl.com
Galaxy www.atgtire.com
BKT www.bkt-tire.com
Tire Warranty Information
Page 31
Great Plains Manufacturing, Inc. Table of Contents Index Appendix 27
Tire Inflation Chart
Transport/
Center
Transport/
Center
Transport/
Center
11L x 15” Load F
12.5L x Load F
12.5L x 16.5” Load
G Galaxy
90psi
(621 kPa)
90 psi
(621 kPa)
105 psi
(724 kPa)
Hydraulic Connectors and Torque
Refer to Figure 14 (a hypothetical fitting)
Leave any protective caps in place until immediately prior
to making a connection.
1
NPT - National Pipe Thread
Note tapered threads, no cone/flare, and no O-ring.
Apply liquid pipe sealant for hydraulic applications.
Do not use tape sealant, which can clog a filter and/or
plug an orifice.
2
JIC - Joint Industry Conference (SAE J514)
Note straight threads and the 37° cone on
“M” fittings (or 37° flare on “F” fittings).
Use no sealants (tape or liquid) on JIC fittings.
3
ORB - O-Ring Boss (SAE J514)
Note straight threads and elastomer O-Ring .
Prior to installation, to prevent abrasion during tightening, lubricate O-Ring with clean hydraulic fluid.
Use no sealants (tape or liquid) on ORB fittings.
ORB fittings that need orientation, such as the ell
depicted, also have a washer and jam nut
(“adjustable thread port stud”). Back jam nut away
from washer. Thread fitting into receptacle until
O-Ring contacts seat. Unscrew fitting to desired
orientation. Tighten jam nut to torque specification.
4 5
5 7
8 9
5
Dash
Size
-4
-5
-5
-5
-6
-6
-6
-8
-8
-8
Tire Warranty Information
1
9
8
4
2
Figure 14
Hydraulic Connector ID
Fittings Torque Values
Fitting N-m Ft-Lbs
1
⁄4-18 NPT 1.5-3.0 turns past finger
tight
1
⁄2-20 JIC 19-20 14-15
1
⁄2-20 ORB w/jam nut 12-16 9-12
1
⁄2 -20 ORB straight 19-26 14-19
5
⁄16-18 JIC 24-27 18-20
5
⁄16-18 ORB w/jam nut 16-22 12-16
5
⁄16-18 ORB straight 24-33 18-24
3
⁄4 -16 JIC 37-53 27-39
3
⁄4 -16 ORB w/jam nut 27-41 20-30
3
⁄4-16 ORB straight 37-58 27-43
7
5
3
31282
2014-02-12 550-353M
Page 32
28 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
Torque Values Chart
Bolt
Size
in-tpi
1
⁄4-20
1
⁄4-28
5
⁄16-18
5
⁄16-24
3
⁄8-16
3
⁄8-24
7
⁄16-14
7
⁄16-20
1
⁄2-13
1
⁄2-20
9
⁄16-12
9
⁄16-18
5
⁄8-11
5
⁄8-18
3
⁄4-10
3
⁄4-16
7
⁄8-9
7
⁄8-14
1-8
1-12
1
1
⁄8-7
1
1
⁄8-12
1
⁄4-7
1
1
⁄4-12
1
3
⁄8-6
1
3
1
⁄8-12
1
1
⁄2-6
1
1
⁄2-12
Bolt Head Identification
Grade 2 Grade 5 Grade 8 Class 5.8 Class 8.8 Class 10.9
a
b
d
N-m
ft-lb
7.4 11 16
8.5 13 18
15 24 33
17 26 37
27 42 59
31 47 67
43 67 95
49 75 105
66 105 145
75 115 165
95 150 210
105 165 235
130 205 285
150 230 325
235 360 510
260 405 570
225 585 820
250 640 905
340 875 1230
370 955 1350
480 1080 1750
540 1210 1960
680 1520 2460
750 1680 2730
890 1990 3230
1010 2270 3680
1180 2640 4290
1330 2970 4820
N-m N-m
5.6 8 12
61014 5 811
11 17 25 12 19 27
13 19 27 13 21 29
20 31 44 24 39 53
22 35 49 29 45 62
32 49 70 42 67 93
36 55 78 44 70 97
49 76 105 66 77 105
55 85 120 68 105 150
70 110 155 73 115 160
79 120 170 105 165 230
97 150 210 115 180 245
110 170 240 145 230 300
170 265 375 165 260 355
190 295 420 205 325 450
165 430 605 230 480 665
185 475 670 355 560 780
250 645 910 390 610 845
275 705 995 705 1120 1550
355 795 1290 785 1240 1710
395 890 1440 1270 1950 2700
500 1120 1820 1380 2190 3220
555 1240 2010
655 1470 2380
745 1670 2710
870 1950 3160
980 2190 3560
Bolt Head Identification
Bolt
Size
ft-lb ft-lb ft-lb ft-lb ft-lb
mm x pitch
M 5 X 0.8
M 6 X 1
M 8 X 1.25
M 8 X 1
M10 X 1.5
M10 X 0.75
M12 X 1.75
M12 X 1.5
M12 X 1
M14 X 2
M14 X 1.5
M16 X 2
M16 X 1.5
M18 X 2.5
M18 X 1.5
M20 X 2.5
M20 X 1.5
M24 X 3
M24 X 2
M30 X 3.5
M30 X 2
M36 X 3.5
M36 X 2
a. in-tpi = nominal thread diameter in inches-threads per inch
b. N· m = newton-meters
c. mm x pitch = nominal thread diameter in mm x thread pitch
d. ft-lb = foot pounds
c
5.8 8.8 10.9
N-m N-m N-m
357
71115
17 26 36
18 28 39
33 52 72
39 61 85
58 91 125
60 95 130
90 105 145
92 145 200
99 155 215
145 225 315
155 240 335
195 310 405
220 350 485
280 440 610
310 650 900
480 760 1050
525 830 1150
960 1510 2100
1060 1680 2320
1730 2650 3660
1880 2960 4100
946
Torque tolerance + 0%, -15% of torquing values. Unless otherwise specified use torque values listed above.
25199m
25199
Disc or Coulter Gang Bolt Torque 1 1/2”-6 650-750 Foot-pounds (175 lbs on 4’ cheater).
550-353M 2014-02-12
Page 33
Great Plains Manufacturing, Inc. Table of Contents Index Appendix 29
Warranty
Great Plains Manufacturing, Incorporated warrants to the original purchaser that this tillage
and workmanship for a period of one year from the date of original purchase when used as intended and under normal service and conditions
for personal use; 90 days for commercial or rental purposes. This Warranty is limited to the replacement of any defective part by Great Plains
Manufacturing, Incorporated and the installation by the dealer of any
such replacement part. Great Plains reserves the right to inspect any
equipment or part which are claimed to have been defective in material
or workmanship.
This Warranty does not apply to any part or product which in Great
Plains’ judgement shall have been misused or damaged by accident or
lack of normal maintenance or care, or which has been repaired or altered in a way which adversely affects its performance or reliability, or
which has been used for a purpose for which the product is not designed. This Warranty shall not apply if the product is towed at a speed
in excess of 20 miles per hour.
Claims under this Warranty must be made to the dealer which originally
sold the product and all warranty adjustments must by made through
such dealer. Great Plains reserves the right to make changes in materials or design of the product at any time without notice.
This Warranty shall not be interpreted to render Great Plains liable for
damages of any kind, direct, consequential, or contingent, to property.
Furthermore, Great Plains shall not be liable for damages resulting from
any cause beyond its reasonable control. This Warranty does not extend to loss of crops, losses caused by harvest delays or any expense
or loss for labor, supplies, rental machinery or for any other reason.
No other warranty of any kind whatsoever, express or implied, is
made with respect to this sale; and all implied warranties of merchantability and fitness for a particular purpose which exceed
the obligations set forth in this written warranty are hereby disclaimed and excluded from this sale.
This Warranty is not valid unless registered with Great Plains Manufacturing, Incorporated within 10 days from the date of original purchase.
equipment will be free from defects in material
42134
2014-02-12 550-353M
Page 34
30 8321-8552DV Table of Contents Index Great Plains Manufacturing, Inc.
550-353M 2014-02-12
Page 35
Great Plains Manufacturing, Inc. Table of Contents 31
Index
A
address, Great Plains ............. 11, 20
amber reflectors ................................. 5
B
bearings ........................................... 20
bolts .................................................20
C
Caution
Read Operator’s Manual .............. 6
CAUTION, defined ............................. 1
chain ................................................13
checklists
pre-setup .................................... 12
pre-start ...................................... 17
transport ..................................... 17
chemicals ........................................... 2
children ..............................................3
clothing ............................................... 2
coil tine drags ................................... 19
color code, hose ............................... 14
contact Great Plains ................ 11
Coulter scrapers ............................... 18
covered models ................................ 10
customer service .............................. 11
, 20
D
Danger
Crushing Hazard ................... 7
DANGER, defined .............................. 1
decal replacement .............................. 5
decals
caution
read manual ........................... 6
tire pressure and torque ......... 9
danger
crushing .................................. 7
electrocution ........................... 7
notice
transport lock .......................... 8
speed
30km per hr ............................ 9
warning
hand crushing ......................... 8
high pressure fluid .................. 8
overhead wing ........................ 7
speed ...................................... 9
wings could fall ....................... 9
decal, safety ....................................... 5
definitions ......................................... 10
directions .......................................... 10
Disc Gang Depth Gauge Calibration 15
Disc Gang Field Operation ............... 16
Disc or Coulter Gang Bearing .......... 21
Disc scrapers ................................... 18
drag bolts ......................................... 20
, 9
E
email, Great Plains .................. 11, 20
F
fire ...................................................... 1
H
hd spike & reel drag ......................... 19
headphones ....................................... 2
hearing ............................................... 2
high pressure fluids ........................... 2
hills .................................................. 13
Hinge Points .................................... 21
hinge points
inside wing ................................. 21
outside wing ............................... 21
Hitch Turnbuckle Adjustment ........... 14
hitching ............................................ 13
hose handles ................................... 14
hydraulic connectors ........................ 27
hydraulic safety .................................. 2
I
inflation ............................................ 26
J
JIC ................................................... 27
Joint Industry Conference ................ 27
J514 ................................................. 27
L
leaks ..........................................2, 20
left-hand, defined ............................. 10
lights .................................................. 2
lubrication ........................................ 20
M
Maintenance .................................... 20
maintenance safety ............................ 4
medical assistance ........... 2
model number .................................. 11
, 14, 17
N
National Pipe Thread ....................... 27
Note, defined ................................... 10
Notice, defined ................................. 10
NPT ................................................. 27
O
orange reflector ................................. 6
ORB ................................................. 27
orientation rose ................................ 10
O-Ring Boss .................................... 27
owner assistance ............................. 11
P
parts ................................................ 20
phone number, GP .......................... 12
Pre-leveling of machine ................... 14
protective equipment ......................... 2
R
red reflectors ...................................... 6
reel ................................................... 19
reflectors
amber ........................................... 5
orange .......................................... 6
red ................................................ 6
SMV ..............................................5
reflectors, safety ................................. 5
repair parts .......................................11
riders .................................................. 3
right-hand, defined ........................... 10
rose, oriention ..................................10
S
SAE J514 ......................................... 27
safety chain ......................................13
safety decal ........................................5
safety information ............................... 1
safety symbol ..................................... 1
serial number ...................................11
setup ................................................12
shutdown ............................................ 3
slopes ............................................... 13
SMV (Slow Moving Vehicle) ...............5
Spanish ................................ 6
Specifications and Capacities .......... 26
speed .................................................7
spike drag .........................................18
storage ............................................... 3
storing machine ................................ 20
support .................................... 11
symbol, safety .................................... 1
, 7, 9
, 20
T
tables
document family ......................... 10
fittings torque ..............................27
hose color code ..........................14
models covered ..........................10
torque values ..............................28
tire inflation ....................................... 26
tires ....................................................3
transport ...........................................17
transport lock ....................................20
transport speed .................................. 3
transporting ...................................... 17
troubleshooting
coulter/disc gang ........................ 23
general .......................................22
sweep/shank ..............................24
transport ..................................... 25
U
URLs, tires .......................................26
W
WARNING, defined ............................1
warranty ............................................29
tire ..............................................26
welding ...............................................4
Wheel Bearing Hub ..........................20
Wing Depth Adjustment ...................15
www .................................................26
2014-02-12 Table of Contents 550-353M
Page 36
32 8321-8552DV Table of Contents Great Plains Manufacturing, Inc.
Numerics
13 mph ............................................... 3
20 mph ...................................... 3
22 kph ................................................ 3
32 kph ................................................ 3
550-353M, manual ........................... 10
550-353P, manual ............................ 10
550-353Q-ENG, manual .................. 10
, 17
550-353Q, manual ............................10
818-055C, reflector .............................5
818-188C, decal .................................9
838-094C, decal .................................8
838-598C, decal .................................6
838-599C, decal .................................7
838-600C, decal .................................7
838-602C, decal .................................7
838-603C, reflector ............................6
838-611C, decal ................................. 8
838-612C, decal ................................. 9
838-613C, decal ................................. 8
838-614C, reflector ............................6
838-615C, reflector ............................5
838-890C, decal ................................. 9
550-353M Table of Contents 2014-02-12
Page 37
TableofContents Index
Table of Contents Index
Page 38
TableofContents Index
Great Plains Manufacturing, Inc.
Corporate Office: P.O. Box 5060
Salina, Kansas 67402-5060 USA
Loading...