Page 1
Table of Contents Index
Operator Manual
8315, 8318, 8321 & 8324
Series VIII Discovator, DVN (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!
Illustrations may show optional equipment not supplied with standard unit.
41541
ORIGINAL INSTRUCTIONS
© Copyright 2013 Printed 2013-11-25 550-466M
Table of Contents Index
EN
Page 2
Table of Contents Index
Plains International
Plains International
Plains International
Great Plains International
(166-372M-CZE)
Great Plains International
(166-372M-FRA)
Great Plains International
(166-372M-BUL)
(166-372M-ENG)
Great
(166-372M-HUN)
Great
(166-372M-LIT)
Great
Great Plains International
Plains International
(166-372M-RUS)
Great Plains International
Table of Contents Index
(166-372M-RUM)
Great
(166-372M-GER)
Page 3
Great Plains Manufacturing, Inc. iii
Table of Contents
Equipment Identification .............................................1
Machine Label ................................................................1
Machine Record ............................................................. 2
Machine Log...............................................................2
Machine Details..........................................................2
Dealer Information......................................................2
Great Plains Regional Agent ......................................2
Introduction.....................................................................3
Description of Unit ..........................................................3
Using This Manual..........................................................4
Document Family........................................................4
Definitions................................................................... 4
Owner Assistance ..........................................................4
Important Safety Information ...................................... 5
Safety Decals and Lights..............................................10
Preparation and Setup ...............................................16
Initial Setup...................................................................16
Seasonal Setup ............................................................16
Pre-Tilling Setup...........................................................16
Hitching Tractor to Discovator ......................................17
Clevis Hitch...............................................................18
Category III Hitch...................................................... 18
Electrical Hookup......................................................19
Hydraulic Hose Hookup............................................ 20
Brake Hook-up (Option) ...............................................20
Operating Instructions..............................................23
Pre-Start Checklist .......................................................23
Unfolding and Folding ..................................................24
Folding...................................................................... 25
Unfolding ..................................................................26
Lowering and Raising Discovator.................................28
Lowering...................................................................29
Raising .....................................................................30
Transporting the Discovator ......................................... 31
Tractor Requirements............................................... 32
Transport Checklist...................................................32
Brake Operation (option) .............................................. 33
Service Brake Operation ..........................................33
Transport ...................................................................... 35
Transport Steps........................................................35
Hitching a Trailing Implement (Optional) ..................36
Final Field Checklists................................................36
Field Operation.............................................................36
First Time Field Adjustments ....................................... 37
Pre-Leveling of Machine .......................................... 37
Front to Rear Leveling.............................................. 37
Side to Side Leveling ............................................... 38
Disc Gang Depth Calibration.................................... 38
Field Operation of Disc Gangs ................................. 39
Scraper Settings .......................................................... 39
Rear Attachment Settings ............................................ 40
Spike Drag Settings ................................................. 40
HD Spike & Reel Settings ........................................ 40
Coil Tine Settings ..................................................... 41
Reel Settings............................................................ 41
Parking......................................................................... 41
Storage ........................................................................ 42
Unfolded Storage ..................................................... 42
Maintenance and Lubrication ................................... 43
Maintenance Lift Lock .................................................. 44
Maintenance Lift Unlock........................................... 44
Lubrication and Scheduled Maintenance..................... 45
Brake Maintenance (Option) ........................................ 46
Brake Line Charge and Bleed .................................. 46
Drain Hydraulic Brake Lines................................. 46
Charge and Bleed System ...................................47
Air Brake Maintenance............................................. 48
Reservoir Draining ............................................... 48
Air Brake Filter Cleaning ......................................48
Brake Drum and Liner Maintenance ........................ 48
Brake Shoe Replacement ........................................ 50
Brake Drum Maintenance ........................................ 54
Mounting Wheels ..................................................... 55
Test and Adjust Brakes ............................................ 55
Troubleshooting......................................................... 56
General Performance................................................... 56
Coulter/Disc Gang Performance .................................. 57
Sweep/Shank Performance ......................................... 58
Transport...................................................................... 58
Brakes (Option)............................................................ 59
Retract Kit (Option) ...................................................... 61
Appendix..................................................................... 62
DVN Specifications and Capacities ............................. 62
Torque Values Chart.................................................... 63
Tire Inflation Chart ....................................................... 64
Hydraulic Connectors and Torque ............................... 64
Dimensions (Transport) 8315DVN .............................. 65
Dimensions (Transport) 8318DVN............................... 66
© Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 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.
11/25/2013 550-466M
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
iv 8315-8324DVN Great Plains Manufacturing, Inc.
Dimensions (Transport) 8321DVN............................... 67
Dimensions (Transport) 8324DVN............................... 68
warranty........................................................................69
Index ............................................................................71
550-466M 11/25/2013
Page 5
Great Plains Manufacturing, Inc. 1
Equipment Identification
This Operator manual applies to the following Great
Plains pull-type secondary conventional tillage systems:
8315DVN 4.8m, 27-shank, 24 blades
8318DVN 5.5m, 31-shank, 28 blades
8321DVN 6.6m, 37-shank, 32 blades
8324DVN 7.3m, 41-shank, 36 blades
See “DVN Specifications and Capacities” on page 62
for precise swath information.
Refer to Figure 1
For positive equipment identification, consult the
machine label located on the top of the left hand hitch
1
truss, near the single point depth control.
Label/Plate Location
Figure 1
1
41585
Machine Label
Models 8315DVN, 8318DVN, 8321DVN and 8324DVN
can be built to European regulatory and highway transport
standards.The machine can also be built to North American regulatory and highway transport standards, depending on which light option package is purchased.
Refer to Figure 2 (which is NOT from an actual machine)
The machine label provides data which is specific to your
machine as originally shipped from the factory.
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 no
longer are accurate for your machine. Update the Record
on the next page upon modifications.
See “Transporting the Discovator” on page 31 and
“DVN Specifications and Capacities” on page 62 for
additional weights and measurements.
Great Plains
Manufacturing, Inc.
P.O. Box 5060
Model Number: Serial Number:
Salina, KS 67401 USA
A1196X8315DVN
Working Width m: Transport Width m: Year of Manufacture:
201199.9 m99.9 m
Total Weight kg:
99999 Kg
Axle Load kg: Drawbar Vertical Load kg:
99999 Kg
*GP-1879DD*
99999 Kg
A1196X
Figure 2:8315DVN:
Example Machine Label
819-197C
42186
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Page 6
2 8315-8324DVN Great Plains Manufacturing, Inc.
Machine Record
Machine Details
Record your machine details in the Log at right. If you
replace this manual, be sure to transfer this information
to the similar page of the new manual.
If you add or remove Options, update the Log. If the page
cannot be legibly updated, request or print a new Operator manual.
Dealer Information
My Customer
Number / ID
Dealer Name
Street
Place
Post Code
Country
Voice
Machine Log
Machine Model
Serial Number
Working Width
Transport Width
Maximum Gross Weight
Maximum Axle Load
Year of Manufacture
Date of Delivery
Date in Service
Options
Fax
Web
Email
Great Plains Regional Agent
(If different than those on page 4)
Agent Voice
Street Fax
Place Web
Post Code Email
Country
550-466M 11/25/2013
Page 7
Great Plains Manufacturing, Inc. Equipment Identification 3
Introduction
Great Plains welcomes you to its growing family of new
product owners. Your Discovator 8315-8324DVN 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.
Before placing the machine into service for the first time,
read and understand this manual, in particular the
“Important Safety Information”, pages 5 to 9. Have all
operators read this manual before allowing them to work
with the machine.
Description of Unit
The 8315DVN, 8318DVN, 8321DVN and 8324DVN are
pull-type, field finishing, one pass tillage tool. The
8315DVN, 8318DVN, 8321DVN and 8324DVN are three
section machines that fold for narrow (3m) transport.
A row of hydraulic-adjustable Turbo coulters or shallow
concavity disk blades fractures the ground and size residue
3.8 cm above the sweeps.
The Max-Mix shank pattern increases chemical incorporation, reduces windrowing, and helps eliminate banding.
Four rows of shanks on 71.12 cm centers allows for residue to flow through the machine using the Max-Mix shank
pattern. The effective spacing of the four rows with a 22.9
cm sweep of shanks is a sweep overlap of 6.4 cm. The
shanks can fracture the ground up to 30.5 cm deep.
The DVN models offer optional shank configurations. The
configurations are k-flex spring with a minimum draft
shank, K-Flex spring with a flat shank, heavy duty magnum
spring with a minimum draft shank, or heavy-duty magnum
spring with a flat shank. A 22.86 cm sweep is available with
or without hard facing.
Various finishing attachments are available to customize
your tillage and residue requirements for your operation.
An optional rear hitch is available for pulling implement/
tanks that do not impose high vertical loads on the hitch,
e.g., vertical load < 350kg.
Brakes are optional on DVN models. Service brakes are
operated by air or hydraulic lines to the tractor. Chock
blocks are provided in both brake options to prevent movement of the machine while not connected to the tractor.
Chock blocks are manually placed.
Do not modify the DVN except as instructed by Great
Plains. Do not use attachments other than as provided by
or authorized by Great Plains.
R
L
Figure 3
8315DVN Discovator
R
F
U
B
L
D
41597
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4 8315-8324DVN Great Plains Manufacturing, Inc.
Using This Manual
This manual will familiarize you with safety, hitching,
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.
Document Family
550-466Q-ENG Assembly Manual
550-466Q Pre-Delivery Manual
550-466M Operator Manual (this document)
550-466P Parts Manual
Definitions
Safety admonishment signal words are described on
page 5.
The following terms are used throughout this manual.
Identifies an Economic (not a Safety) Risk:
NOTICE provides a crucial point of information related to the
current topic. Read and follow the instructions to avoid damage
to equipment and ensure desired field results.
Note: This form sets off useful information related to the
current topic, or forestalls possible misunderstanding.
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.
R
F
U
B
L
D
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 (page 1) when ordering
parts from your Great Plains dealer.
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.
For further assistance contact Great Plains via the Agent
recorded on page 2, or at:
For U.K. and Europe
SIMBA Great Plains
Woodbridge Road Ind. East
Sleaford
Lincolnshire NG34 7EW England
Voice:+44 (0) 1529 304654
Fax:+44 (0) 1529 413468
Email:simba.international@simba.co.uk
For Other Regions
Great Plains Manufacturing, Inc.
PO Box 5060
Salina KS 67402-5060 USA
Voice:+(800)255-9215
Fax:+1 785-822-6722
Email:gp_web_cs@greatplainsmfg.com
550-466M 11/25/2013
Page 9
Great Plains Manufacturing, Inc. 5
Important Safety Information
Look for Safety Symbol
The SAFETY ALERT SYMBOL1 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, and the colour Safety Red, indicate an
imminent hazard 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, and the colour Safety Orange, indicate a
potential hazard 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, and the colour Safety Yellow, indicate a
potential hazard 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 and Lights”on
page 10, thoroughly.
▲ Read all instructions noted on the decals.
▲ Keep decals clean. Replace damaged, faded and illegible
decals.
1. Symbols and colours in this manual, and on north american models, are based on ANSI standard Z535.
Decals on international models are based on ISO standard 3864.
11/25/2013 550-466M
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6 8315-8324DVN 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.
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 Discovator requires a PowerBeyond port, which is always under pressure when the
tractor is running.
▲ Avoid the hazard by relieving pressure at other remote, 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.
550-466M 11/25/2013
Page 11
Great Plains Manufacturing, Inc. Important Safety Information 7
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.
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.
Transport Machinery Safely
Maximum transport speed for implement is 30 kph.
Some rough terrains require a slower speed. Sudden
braking can cause a towed load to swerve and upset.
▲ Do not exceed 30 kph or 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 national, regional and local laws.
▲ 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 Discovator in case of
breakdown on the road.
▲ Keep clear of overhead power lines and other obstructions
when transporting. Refer to transport dimensions under
“DVN Specifications and Capacities” on page 62.
▲ Reduce speed on rough roads.
▲ 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 parking jack provided.
▲ Detach and store Discovator in an area where children nor-
mally do not play.
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8 8315-8324DVN Great Plains Manufacturing, Inc.
Practice Safe Maintenance
▲ Understand procedure before doing work. Use proper
tools and equipment. Refer to this manual. For brake
work, see specific safety information beginning on
page 46.
▲ Work in a clean, dry area.
▲ Unfold and lower the implement, put tractor in park, turn
off engine, and remove key before performing maintenance. If work must be performed with implement raised,
use centre section lift lock and gauge lock channels provided.
▲ Make sure all moving parts have stopped and all system
pressure is relieved.
▲ Allow machine to cool completely.
▲ Disconnect battery ground cable (-) before servicing or
adjusting electrical systems.
▲ Welding: Disconnect battery ground. Protect hydraulic
lines. Avoid fumes from heated paint.
▲ 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 Discovator before
operation.
550-466M 11/25/2013
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Great Plains Manufacturing, Inc. Important Safety Information 9
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 Discovator 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 implement, or imple-
ment and nurse tank during hitching.
▲ 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
Discovator. Make sure all persons are clear of working
area.
Accident Prevention
▲ In addition to the Operating Instructions, it is important to
observe the accident prevention regulations specified by
agricultural trade associations. It is the Operator’s responsibility to ensure that all other persons are excluded from
danger zones surrounding or on the machine during its
operation.
It is the Owner’s Responsibility to Ensure;
▲ The Operator is trained and competent to use the machine
and tractor.
▲ The tractor is suitable for the machine.
▲ Adequate Risk and COSHH assessments have been under-
taken regarding the machine’s use, Specifically, these
include issues concerning contact with the soil, crop residues, chemicals, lubricants and other compounds during
operation, maintenance, and he possibility of stones being
ejected at high speed during work.
Beware of trapping hazards when manipulating the parking
jacks, shut-off valves, wheel chocks, or other moving parts.
Ensure any heavy components are fully supported when
removing pins/bolts.
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10 8315-8324DVN Great Plains Manufacturing, Inc.
Safety Decals and Lights
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.
Reflector: Slow Moving Vehicle (SMV)
International: 818-055C North America: 818-055C
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.
On the back of smv post;
1 total
.
Reflectors: Red Triangles
International: 833-399C North America: n/a
(North American models
use
818-055C SMV reflectors,
838-614C red reflectors &
838-615C amber reflectors.)
One each rear fluorescent panel;
2 total
.
41595
43256
550-466M 11/25/2013
Page 15
Great Plains Manufacturing, Inc. Important Safety Information 11
Reflectors: Fluorescent Panels
International: 833-398C
One each side, front frame,
one each side, rear;
4 panels total
North America: n/a
43255
Reflectors: Red
International: n/a North America: 838-614C
On rear of light bracelets
both sides (above Orange);
2 total
Reflectors: Orange
International: n/a North America: 838-603C
On rear of light brackets,
both sides
(below Reds);
2 total
43256
41589
41589
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12 8315-8324DVN Great Plains Manufacturing, Inc.
Reflectors: Amber
International: 838-615C
North America: 838-615C
Two on outside of center
frame, one on outside of
brace bar (both sides), two
on rear finishing attachment
(not shown, visible from side
while folded for transport;
8 total
Transport: Speed
International: 848-398C
On speed limit bracket, front
of center brace bar.
1 total
Two on front of light brackets, one on outside of center
frame, one on outside of
brace bar (both sides), two
on rear finishing attachment
(not shown, visible from side
while folded for transport;
8 total
North America: 818-188C
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.
On front of hitch, (rear);
1 total
818-188C Rev. C
42182
41587
42192
41588
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Page 17
Great Plains Manufacturing, Inc. Important Safety Information 13
Transport: Wheel Chock (Option)
International: 848-757C North America: 848-757C
Outside tube of center frame, near wheel chocks (both
sides);
2 total
42182
Danger: Crush
International: 848-513C North America: 838-600C
Front of hitch, rear of manual pack (front);
1 total
Danger: Electrocution
International: 848-516C North America: 838-599C
On front of brace bar (left side);
1 total
Caution: Tire Pressure & Torque
International: 838-890C North America: 838-890C
41588
41586
Outside, center transport wheel (both sides);
2 total, models 8315 & 8318 only
41596
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14 8315-8324DVN Great Plains Manufacturing, Inc.
Warning: Wing Crushing
International: 848-530C
848-530C REV A
Outside of wing stop tube,
top of brace bar and wing
(both sides);
6 total
North America: 838-602C
42182
Top outside of center frame
and wing (both sides);
4 total
Warning: High Pressure Fluid
International: 848-517C North America: 838-094C
Front of brace bar;
1 total
Warning: Hand Pinch
International: 848-531C North America: 838-611C
Front side of brace bar wing hinge plate (both sides);
2 total
41596
41586
41586
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Great Plains Manufacturing, Inc. Important Safety Information 15
Caution: Read Operator Manual
International: 848-512C North America: 838-598C
Front of hitch;
1 total
41588
Caution: Tires Not A Step
International: 848-507C North America: 818-398C
On top center of center frame and wing frame (both
sides);
4 total
Notice: Transport Lock
International: 848-512C North America: 838-613C
Outside, center of center frame (both sides);
2 total
Danger: Cutting of Foot
International: 848-781C North America: 848-271C
41596
41596
On front of left truss (bottom);
1 total
41586
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16 8315-8324DVN Great Plains Manufacturing, Inc.
Preparation and Setup
This section helps you prepare your tractor and 8315,
8318, 8321 & 8324DVNfor use, and covers seasonal
tasks, and tasks when the tractor/Discovator configuration changes.
Before using the 8315, 8318, 8321 & 8324DVN in the
field, you must hitch the Discovator 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.
Initial Setup
See “First Time Field Adjustments” on page 37 and
“Hitching a Trailing Implement (Optional)” on page 36
for pre-delivery items (normally completed by dealer),
and first-time/infrequent setup tasks, including:
❑ Remove protective film from large highway reflec-
tors.
Seasonal Setup
On initial delivery, use with a new tractor, and seasonally,
check and as necessary, complete these items before
continuing to the routine setup items:
❑ Bleed hydraulic system (page 30).
❑ Wing levelling and alignment (page 38).
❑ De-grease exposed cylinder rods if so protected at
last storage.
Pre-Tilling Setup
Complete this checklist before routine setup:
❑ Read and understand “Important Safety Informa-
tion” on page 5.
❑ 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 “Hydraulic Hose Hookup” on
page 20.
❑ If machine is folded, be sure the wing lock valve is
locked. Remove wing locking pins. Open the lock
valve on front of brace bar and slowly unfold 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, remove
both transport locks from lift cylinders, 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.
❑ Put transport locks back in place on lift cylinders.
❑ Check that all grease fittings are in place and lubri-
cated. See “Lubrication and Scheduled Maintenance” on page 45. 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 and Lights” on page 10.
❑ Inflate tires to pressure recommended and tighten
wheel bolts as specified. See “Tire Inflation Chart”
on page 64.
❑ Re-fold the machine slowly. Close the lock valve on
the front of the brace bar. Always use the transport
locks and close lock valve when moving from field to
field. You are now ready to go to the field.
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Great Plains Manufacturing, Inc. Preparation and Setup 17
Hitching Tractor to Discovator
Crushing Hazard:
You may be severely injured or killed by being crushed between
the tractor and implement. Do not stand or place any part of
your body between implement and moving tractor. Stop tractor
engine and set tractor parking brake before attaching cables
and hoses.
Improper Pull Hazard:
Severe injury or death may result if improper transport vehicle
is used. Hitch to 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 of the towing tractor
or implement.
For hillsides and steep slopes, set tractor wheels as wide as
possible for maximum stability.
Hitch Failure Risk:
The 8315/8318/8321/8324DVN Discovator are pull-type
implements equipped with standard Category IV single tang
hitch. It may be converted to a Category III or clevis hitch
using supplied accessory parts. Always have two (2) bolts in
two holes of both tongue and hitch.
Tractor Oil Flow Adjustment Risk:
As a general rule the tractor oil flow rate should be set to the
lower setting before starting. Oil flow can be increased to
allow the desired rate of operation as applicable. Performing
the adjustment will minimise excessive oil flow and consequent
power usage and heat generation.
Extended Parking Risk:
When the 8315/8318/8321/8324DVN Discovator are parked
for extended periods of time, it should ideally be left in the
unfolded, i.e work position for stability, safety and ease of
access for maintenance. However, parking the 8315/8318/
8321/8324DVN Discovator in the fold position (ensuring
transport locks are engaged) is acceptable in the normal
course of operation.
Drawbar Sway Risk:
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 the Discovator” on
page 31, for safe transporting.
o prevent soil compaction on rows, set tractor wheels
between rows.Raise tractor three-point arms (if
equipped) clear up to clear Discovator.
1. For TWO-WHEEL DRIVE and MFWD tractors, pin
drawbar in fixed center position for field and transport. For FOUR-WHEEL DRIVE and TRAC-DRIVE
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18 8315-8324DVN Great Plains Manufacturing, Inc.
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.
Clevis Hitch
Refer to Figure 4
The base hitch must be upright (with the recessed notch
on the bottom) for this configuration. This places the
tongue weight on the base hitch, and not the clevis.
1. Select one each:
890-798C HITCH CLEVIS
82
802-487C HHCS 3/4-10X6 GR8
48
803-367C NUT HEX TOP LOCK 3/4-10 PLT
62
2. With the square-shouldered end of the clevis up,
fully seat the clevis in the upright base hitch .
Insert the Grade 8 bolt from below. Secure with
lock nut .
62
48
82
83
62
82
48
Hitch Failure Hazard:
Install the hitch base and assemble the clevis parts as shown.
Incorrect installation or assembly may result in failure of the
clevis bolt, leading to hitch failure. This could result in a serious highway accident or severe machine damage.
83
Category III Hitch
The base hitch must be inverted (with the recessed notch
on the top) for this configuration. Set the V-block to
allow some vertical articulation of the draw bar pin.
Always use at least one cushion .
88
1. Select one each:
PPI-302V TOP PLATE - CAT 3
89
PPI-203VR V-BLOCK
87
802-383C HHCS 3/4-10X3 GR5
47
and two:
PPI-205H CUSHION
88
2. Set the cushions inside the hitch recess , just for-
ward of the vertical bolt hole. Position the V-block
forward of the cushions and check the size of the
resulting pinning hole. Remove a cushion if needed.
3. Add the top plate . Secure from below with
Grade 5 bolt .
89
47
87
88
87
89
88
87
47
Figure 4
Configure Hitch
31740
42326
31741
550-466M 11/25/2013
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Great Plains Manufacturing, Inc. Preparation and Setup 19
Refer to Figure 5
4. Use parking jack to raise and lower Discovator
1
tongue.
5. Remove hitch pin from tractor draw-bar.
6. Back tractor draw-bar into alignment with hitch . Set
tractor parking break.
7. Secure with a locking hitch pin.
8. Secure safety chain to an anchor on the tractor.
3
9. Retract jack foot.
3
2
4
3
10. After hitching tractor to implement, store parking jack
on storage stob on Discovator tongue.
4
1
11. Connect hydraulic hoses (page 20).
12. Connect brake hoses (option, page 22).
13. Connect electrical cables (option, page 19).
Figure 5
Parking Jack and Hitch
42184
Electrical Hookup
Refer to Figure 6
Make sure tractor is shut down with accessory power off
before making connections.
14. Mate lighting connector to tractor outlet.
15. Mate any optional or after-market electrical connectors.
16. Make connections prior to 8315-8324DVN movement.
Figure 6
Lighting Connector European
and North American
41995
25236
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20 8315-8324DVN 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.
High Pressure Fluid Hazard:
Shut down tractor before making hydraulic connections.
Only trained personnel should work on system hydraulics!
Escaping fluid under pressure can have sufficient pressure to
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
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.
Refer to Figure 7
To distinguish hoses on the same hydraulic circuit, refer to
handle symbols.
• 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, implement or hitch. Failure to
safely route and secure hoses and cables could result in
damage requiring component repair/replacement, and
lost field time.
Clean all hydraulic couplings and hook hoses to tractor.
Figure 7
Hose Handles
Color Hydraulic Function
Black Lift (2 hoses)
Green Fold (2 hoses)
Red Gang (2 hoses)
“BRAKES” Hydraulic trailer brakes (Option)
31733
Brake Hook-up (Option)
Two 8315-8324DVN braking (trailer braking) systems are
available:
• Dual-line air system (Figure 8) with wheel chocks
(Figure 10) for parking and
• Single-line hydraulic (Figure 9) with wheel chocks
(Figure 10).
In both systems, the tractor’s trailer brake remote port(s)
operate a hydraulic slave cylinder on the Discovator.
Tractor trailer braking systems are normally integrated
with the tractor brakes, and operate the trailer brakes
when tractor brakes are used during tractor movement.
The trailer braking system may or may not be integrated
with the tractor parking brake system.
550-466M 11/25/2013
Figure 8
Air Brake System
41928
Page 25
Great Plains Manufacturing, Inc. Preparation and Setup 21
Trailer brakes typically are not automatically engaged
when the tractor transmission is in Park, and may not be
engaged by any tractor Emergency Brake.
Both brake systems include four chock blocks to be manually installed for parking the 8315-8324DVN. The tractor
cannot set the implement wheel chocks.
Braking Hazards:
Make sure the operator understands when Discovator brakes
are engaged and when they are released (make a record of
tractor behaviour on page 33).
Also understand and comply with tractor operational restrictions when trailer brakes are used. For example, it is generally
necessary to inter-tie split brakes, and avoid differential (steer-
Figure 9
Hydraulic Brake System
41929
ing braking) if trailer brakes are used.
Figure 10
42198
Machine Parking Brake System
Air Brake Hook-up
Refer to Figure 11
17. Open petcock at reservoir tank. Drain any water
from tank. Close petcock.
Refer to Figure 12
18. Inspect gladhands before connecting. Clean elastomer seal surfaces . Blow debris out of inlet ports.
Check screen condition.
19. Connect the “Brake”, “Service” or “Control” line first.
This line is Blue-coded.
This line operates the Discovator brakes.
11/25/2013 550-466M
1
1
1
Figure 11
Air Brake Reservoir
41874
Page 26
22 8315-8324DVN Great Plains Manufacturing, Inc.
Refer to Figure 12
20. Connect the “Provision” or “Supply” line. This line is
Red-coded.
The Provision line charges a reservoir tank on the
implement. The Brake line operates a valve system
which meters tank air to the master cylinder on the
implement.
Braking Hazard:
Do not use the 8315/8318/8321/8324DVN with a “single-line”
air brake system. This Discovator is designed for transport
speeds that require an air brake system to be “dual-line”. A
single-line tractor system cannot charge the tank that powers
the Discovator brakes.
Roll-Away Hazard:
When unhitching, disconnect the red (control) line first. This
sets the brakes on the implement.
Hydraulic Brake Hook-up
Refer to Figure 13
This is a single hydraulic line, connected to the tractor
“Brake” outlet.
The factory default connector is a 19 mm poppet-style
QD (Quick Disconnect). If this is incompatible with your
tractor, it may be replaced by a connector that mates to,
or can be adapted to:
19 mm male ORB (O-Ring Boss), or
19 mm female JIC (Joint Industry Conference, 37°
flare).
RED
Figure 12
Air Brake Connectors
Figure 13
Hydraulic Brake Connector
BLU
2
29646
29647
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Great Plains Manufacturing, Inc. 23
-
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 5.“Tire Inflation Chart” on page 64
❑ Lubricate Discovator as indicated under “Lubrica-
tion and Scheduled Maintenance” on page 45.
❑ Check all tires for proper inflation, “Tire Inflation
Chart” on page 64.
❑ Check all bolts, pins, and fasteners. Torque as shown
in “Torque Values Chart” on page 63.
❑ 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, dis
connecting 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.
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24 8315-8324DVN Great Plains Manufacturing, Inc.
Unfolding and Folding
Unfold/Fold: Safety Information
Electrocution Hazard:
Keep clear of overhead power lines when unfolding, operating, folding or transporting the machine. At higher voltages,
electrocution can occur without direct contact. Any line voltage present on implement, accessory implement or tractor can
cause severe injury or death.
Overhead crushing hazard:
Unfold and fold implement only if fold hydraulics are bled free
of air and fully charged with hydraulic oil. Keep away and
keep others away when unfolding or folding.
Danger crushing hazard:
An energized hydraulic circuit can activate the fold cylinder
causing serious injury or death. Avoid the hazard by relieving
pressure before shutting down the tractor and removing the
key. Once the hydraulic circuit is de-energized, the shut-off
valve may be opened. If an accident occurs, seek immediate
medical assistance from a physician familiar with this type of
injury.
Pinch Point and Crushing Hazards:
Keep people away from the implement and tractor during folding and unfolding. Risks include pinching or crushing at pivot
points and at multiple sites in pivoting assemblies.
Use wing fold locks. If a hydraulic failure occurs, or hydraulic
levers are moved, unlocked wings could fall suddenly causing
a major road accident, or crushing anything near the wings,
resulting in death or serious injury, and property damage.
Falling Hazard - Tires Not a Step:
Do not use tires as steps or platforms. All tires can be in light
ground contact, or free to spin, when implement is lowered.
Equipment Damage Risk:
Raise implement before unfolding or folding. Folding with
implement lowered causes wing ground engaging components
to dig or drag sideways. Damage is likely.
Wing Tilt Risk:
Fold only while parked on hard level ground. If unfolding
across a slope or while moving, implement may become unstable and damage to implement components and surrounding
property. Damage is likely.
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Great Plains Manufacturing, Inc. Operating Instructions 25
Folding
Fold the Discovator for moves between fields, transport
over public roads, parking and storage. The following
steps presume an implement raised and unfolded for field
work, such as after working a field. Follow the detailed
instructions in steps 1 through 6. beginning on this page,
until familiar with operation.
Refer to Figure 14
Fold: Move to Level Ground
1. Move the implement to level ground with adequate
overhead and lateral clearances for the fold operation.
Park the tractor.
2. Ensure hydraulic lock valve is closed. Check that
1
the wing lock pins are in the field position. Ensure no
one is in the danger zone of the wings. Open locking
2
valve .
1
Figure 14
Wing Lock Valve (Closed)
2
42187
42188
Refer to Figure 15
Fold: Raise Implement (page 30)
3. Extend the lift cylinders to full raise implement. Hold
at raised for a few seconds. Set circuit to Neutral.
Do not install transport locks.
Fold: Fold Wings (page 25)
4. Activate the circuit to retract the fold cylinders.
Note: One wing may reach the stop before the other. A
slight asymmetry is not uncommon in folding.
5. When both wings are in contact with their stops. Set
fold circuit to Neutral (not Float) to hold at folded.
Figure 15
Wing Fold Progression
42199
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26 8315-8324DVN Great Plains Manufacturing, Inc.
Fold: Close Locking Valves (page 26)
2
Cutting Hazard - Sweeps are sharp:
Be careful of sweeps while installing locking pins. Sweeps’
points and wings are sharp. Injury could occur if near a sweep.
Refer to Figure 16
6. Ensure the lock valve is in the closed position (90
degrees from hose) as shown. Place locking pins
in the transport position.
1
2
Unfolding
These steps presume a implement raised and folded for
transport, such as at initial delivery. Follow the detailed
instructions in step 7 through step 16, beginning on this
page, until this is a familiar operation.
Refer to Figure 17
Locking valve is on the front of the center brace bar to prevent wing movement during transport and maintenance.
Note the open and closed position of the valves.
7. Move the implement to level ground with adequate
overhead and lateral clearances for the fold operation.
Remove Transport Locks
Refer to Figure 18
8. Extend lift circuit to lift implement off the transport
locks .
9. Park tractor and implement. Ensure the tractor hydraulics are depressurized and in the locked or closed (not
float) setting position,
10. Shut down tractor and remove the key.
11. Check that lock valve is in the locked position. Check
that the wing lock pins are in the transport position.Inspect fold/lift cylinders, linkages, and hoses for
wear. If parts are worn, the operator should have a
qualified technician replace worn parts.
1 2
1
Wing Lock Valve (Closed) & Locking
1
Wing Lock Valve (Open & Closed)
1
5
Figure 16
Pins
Figure 17
42188
2
42187
42188
6
Figure 18
Cutting Hazard - Sweeps are sharp:
Be careful of sweeps while installing locking pins. Sweeps’
points and wings are sharp. Injury could occur if near a sweep.
12. If parts are in good working order, move transport lock
1 2
to the field position on the frame .
13. Place locking pins in the field position.
14. Move locking valve lever to the open position slowly on
front of center bar.
15. Ensure all personal, e.g., children are out of the danger zones.
550-466M 11/25/2013
Transport Locks
42185
Page 31
Great Plains Manufacturing, Inc. Operating Instructions 27
16. Insert key into tractor and restart the tractor.
Equipment Damage Risk:
Raise before unfolding. If this operation is not performed, the
wing shanks contact the ground, drag, and may be damaged.
Unfolding: Unfold Wings (page 24)
17. Unfold the wings by extending the fold cylinders.
Note: One wing may reach the ground before the other. It is
not uncommon for the folding to be slightly -nonsymmetrical.
Refer to Figure 19
Hold the circuit at extended for several seconds after the
wings engage wing stops on center frame.
Lift: Verify Transport Lock
Refer to Figure 20
Crush/Pinch Hazards:
Make sure the transport locks are engaged. Lift and re-lower
1
if it is not. If the transport locks are not installed, install transport locks, in the transport position the implement will slowly
lower after hydraulic power is removed. If anyone is working
on or under the implement, this could result in serious injury or
death.
Figure 19
Wing Unfold Progression
1
Figure 20
Lift Lock Engaged
42200
42185
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28 8315-8324DVN Great Plains Manufacturing, Inc.
Lowering and Raising Discovator
Lowering/Raising Safety Information
Crushing Hazard During Lowering:
Stay clear of wings, disks, shanks, and attachments during lowering and raising. Wings are extremely heavy and are driven
down with hydraulic pressure. Coulter disk and sweeps are
sharp. During lowering, coulters and sweeps will cut or crush
anything beneath them, and can cause serious injury or death.
Crushing Hazard While Raised:
Use transport locks (page 27) when working on implement.
Without transport locks, center section and wings are held up
only by hydraulic pressure, and slowly lower over time. They
may lower more rapidly if the hydraulic system is damaged.
They lower rapidly if the hydraulics fail, or the Lift circuit is set
to Float or Retract.
Shoving Hazard:
Discovator length changes during raising and lowering. Injury
is possible.
Implement wheels move backward during raising, and forward
during lowering. Tractor may move in some circumstances.
Set brakes / use park to avoid tractor movement. Remain clear
of all tires and ground engaging components during raise and
lower.
Equipment Damage Risk:
Do not lower while any folding or unfolding operations are
under way or partially complete. Coulter disks and sweeps can
dig in or drag on ground and be damaged.
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Great Plains Manufacturing, Inc. Operating Instructions 29
Lowering
Refer to Figure 21
18. Check that the danger zones are clear of personal.
19. Unfold implement before lowering (page 26).
20. Make sure all persons are clear of danger zones,
e.g., coulters and sweeps. Retract lift circuit to lower
implement.
Refer to Figure 22
Falling Hazard:
Do not stand on tires when implement is lowered as they may
have little or no weight on them, and may turn suddenly and
without warning if used as a step, resulting in serious injury.
Figure 21
Lift Lock Disengaged
Figure 22
Implement Raised / Lowered
42205
42201
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30 8315-8324DVN Great Plains Manufacturing, Inc.
Raising
Equipment Damage Risk:
Raise the implement for folding and unfolding. If lowered,
inside wing disks and sweeps drag or dig sideways during fold/
unfold, and damage is likely.
Equipment Damage Risk:
Always raise the implement for tight turns and reverse/backing
operations. Backing with implement lowered causes implement
plugging and damage to implement ground engaging components. Tight turns with implement lowered may damage ground
engaging implement components. The following steps presume
an implement lowered and unfolded for working a field. Follow
the detailed instructions in steps 21 through 24, beginning on
this page, until familiar with operation.
21. Make sure all persons are safely clear of implement
sections and out of danger zones.
22. Activate dedicated Lift circuit (normally Extend).
Refer to Figure 23
23. Extend cylinders until all sections are raised. Hold for
a few seconds to re-phase cylinders.
24. Set circuit to Neutral to temporarily hold sections at
raised.
Equipment Damage Risk:
On tractors with electronic timer controls for hydraulic circuits, lift timers must be set to no more than 2 seconds longer
than needed to fully raise Discovator. To reduce oil heating
and system wear, Do Not Set for Continuous Mode.
Figure 23
42202
Implement Lowered / Raised
Refer to Figure 24
Note: Transport locks are provided to hold a fold/unfold
implement at fully raised position for transport,
maintenance, or storage.
Figure 24
42185
Lift Lock Engaged
Unfolded Transport Locks: Wing Pinch and Crushing Hazards:
The transport locks prevents the center section from lowering,
Use transport locks to hold implement raised for extended
periods. See page 26.
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Great Plains Manufacturing, Inc. Operating Instructions 31
Transporting the Discovator
Transport Safety Information
Collision Hazard:
Inadequate Tractor Hazard:
Tractor must weight at least 67% of the implement as towed.
Ensure that the towing vehicle is adequate for the task. Using
an inadequate tow vehicle is extremely unsafe, and can result
in loss of control, serious injury and death. See table on next
page. Do not tow if Discovator exceeds the load rating of the
vehicle.
Loss of Control Hazard:
Do not tow the discovator behind another implement on public
roads. Tow the discovator to the field with a separate vehicle.
The leading implement may not provide sufficient lateral control of a trailing implement at highway speeds. The total
weight of the train can also exceed the steering and/or braking
capability of the tractor. The resulting accident could cause
serious injury or death
Check lights and reflector regularly. Replace bulbs and faded/
worn/missing decals as required. Use lights in transport.
These features are critical to visibility, particularly with other
drivers unfamiliar with farm equipment or not expecting to
encounter a slow-moving vehicle.
Note: An installation of optional brakes on the implement
does not reduce tractor capability requirements or
increase allowed maximum transport speed.
Excessive Speed Hazard:
Maximum transport speed is 30 kph at all times, and lower
with a lighter tractor. Excess speed can result in loss of control
or inability to stop. Reduce speeds if road conditions are less
than ideal.
Unexpected Wing Tilt-Down and Lowering Hazards:
Use wing lock valve and wing locking pins (page 26). Check
that implement centre section lift lock is engaged (page 26).
Failure to use these safety features can cause a major accident
resulting in death, injury and equipment damage. If locks are
not engaged, and a hydraulic failure occurs, or a circuit is
unintentionally set to Float, wings can unfold to ground contact, or implement can settle into ground contact.
Loss of Control Hazard, Tires:
Inflate tires to factory specifications. Tighten wheel nuts to
specifications. Under-inflated tires or loose nuts can cause loss
of control. Over-inflated tires or overt-tightened nuts can fail
suddenly and cause loss of control. Loss of control can cause a
major accident resulting in death, injury and equipment damage. Be sure all transport/maintenance locks are engaged
before checking tire pressure and wheel nut torque values.
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32 8315-8324DVN Great Plains Manufacturing, Inc.
Tractor Requirements
The figures in the table below represent a limited number
of configurations. The weight of your Discovator can vary
by hundreds of kilograms, even if it is the same base
model, due to installed options and/or after-market
equipment.
If your tractor weight or capability is in question, take
your Discovator to a scale and get a precise weight.
Transport Checklist
❑ Plan the route. Avoid steep hills. Keep clearances in
mind. Folded, your 8315-8324DVN is nearly
3.12m high and is 3m wide.
❑ Hitch.
Check that implement is securely hitched to a sufficient tractor (page 17). Always use a locking-style
hitch pin sized to match holes in hitch and draw-bar,
and rated for the load.
❑ Check that tires are properly inflated. Remember
that the implement may be wider than the towing
vehicle. Allow safe clearance.
❑ If implement is equipped with optional brakes:
With tractor in Park, and with tractor parking brake
set, place chock blocks in transport position
(page 21).
❑ Always have lights on for highway operation.
❑ Comply with all national, regional and local safety
laws when travelling on public roads.
❑ Release all brakes and travel with caution.
Configuration 8315DVN 8318DVN 8321DVN 8324DVN
BASE MACHINE, NO ATTACHMENT 3016kg (6635lbs) 3629kg (7984lbs) 4174kg (9183lbs) 4990kg (10,978lbs)
4 ROW COIL TINE DRAG 3468kg (7629lbs) 4134kg (9094lbs) 4758kg (10,468lbs) 5627kg (12,379lbs)
3 ROW COIL TINE AND REEL 3612kg (7947lbs) 4299kg (9548lbs) 4955kg (10,902lbs) 5845kg (12,860lbs)
4 ROW SPIKE AND REEL 3684kg (8105lbs) 4382kg (9640lbs) 5054kg (11,119lbs) 5955kg (13,100lbs)
7 ROW SPIKE DRAG 3648kg (8026lbs) 4341kg (9549lbs) 5005kg (11,010lbs) 5900kg (12,980lbs)
5 ROW HIGH RESIDUE SPIKE DRAG 3612kg (7947lbs) 4299kg (9458lbs) 4955kg (10,902lbs) 5845kg (12,860lbs)
Weights may change without notice.
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Great Plains Manufacturing, Inc. Operating Instructions 33
Brake Operation (option)
Implement wheel brakes are optional. There are brake
shoe pairs on each of the outside transport wheels. The
shoe pairs are operated by two independent systems:
1. The “service” or “trailer brake” system is controlled
by the tractor. It is connected to the tractor with a
single hydraulic line or two air lines.
Refer to Figure 25
2. The implement can be parked by manually placing
chock blocks on either side of the transport tires.
See also:
page 37 - “Front to Rear Leveling”
page 56 - “Troubleshooting”
page 46 - “Brake Maintenance (Option)”
Brake Roll-Away Hazard:
Set manual chock blocks before unhitching implement. Block
tires if brakes are not installed, and for extra safety in case
brake system is tampered with or is not in working order.
Parking jack is not sufficient restraint for a implement parked
on un-level ground. An unsecured implement. could roll
away, causing an accident resulting in death, injury and substantial property damage.
Both versions of the trailer brake system to the tractor are
spring-release on the implement. Unless the chock blocks are
set, implement service braking is released shortly after
unhitching the implement.
Note: The wheel chock system is not a true emergency
brake system, as there is no safe way to set the
chock blocks when the implement is in motion.
This manual therefore refers to it only for parking.
Machine Damage Risk:
Make the implement chock block removal part of your transport check-list. The tractor cannot place the chock blocks in
the transport position. Transporting with chock blocks in the
park position will result in tire, chock block damage, and/or
loss of chocks.
1
Figure 25
Parking Brake (Chock Blocks)
42198
Service Brake Operation
If optional brakes are installed and connected, the
hydraulic/hydraulic or air/hydraulic systems automatically
work in conjunction with the tractor’s own brakes.
Application and release of tractor brakes during tractor
motion applies and releases the service brake system on
the implement.
Know Your Tractor Systems:
Application of tractor Parking and/or Emergency brakes may
or may not operate the implement service brake system,
depending on the design of the tractor systems.
Consult your tractor manual for details on when remote
brake ports are engaged and released. Note any variance from general behaviour in the table at right. Make
sure the tractor operator knows when implement brakes
are engaged and released.
11/25/2013 550-466M
Tractor
Braking-
Related Event
Normal
tractor
braking
Differential
tractor
braking
Tractor
Parking Brake
Tractor
Emergency
Brake
TypicalTrailer
Brake Port
Response
Activates trailer
brakes
Reduced trailer
braking
Activates trailer
brakes
Record How
Your Tractor
Operates
Page 38
34 8315-8324DVN Great Plains Manufacturing, Inc.
Single-Line Hydraulic Brake Operation
Refer to Figure 26
In this system, a single hydraulic line from the tractor
operates a de-intensifier cylinder on the implement,
which is coupled to the implement master cylinder . The
implement brake hydraulic lines are separate from the
tractor’s line.
With the hydraulic/hydraulic system, braking is immediately available when the tractor hydraulic system is active.
Dual-Line Air/Hydraulic Brake Operation
Refer to Figure 27
In this system, the “supply” (yellow or blue coded) line
charges a reservoir air tank on the implement. The
“service” (red coded) line meters air from the
reservoir to a booster cylinder , which operates the
implement’s hydraulic brake lines .
5 7
2
5
6
1
3
3
2
1
4
8
Hydraulic/Hydraulic Brakes
Figure 26
42196
Service Air Brakes Not Instantly Available:
Prior to movement, wait for the tractor air system to reach full
charge after implement hook-up. Tractor and implement reservoir tanks must be pressurized. implement service braking may
not be immediately available upon tractor hook-up with the air/
hydraulic system.
5
4
6
Figure 27
Air/Hydraulic Brakes
7
8
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Great Plains Manufacturing, Inc. Operating Instructions 35
Transport
Loss of Control Hazard:
Do not tow the discovator behind another implement on public
roads. Tow the discovator to the field with a separate vehicle.
The leading implement may not provide sufficient lateral control of a trailing implement at highway speeds. The total weight
of the train can also exceed the steering and/or braking capability of the tractor. The resulting accident could cause serious
injury or death.
Loss of Control Hazard:
Use an adequate towing vehicle. Never tow an implement that
weighs more than 150% of the towing vehicle (transport vehicle must weigh at least 67% of implement). Ensure that the
towing vehicle is adequate for the task. Using an inadequate
tow vehicle is extremely unsafe, and can result in loss of control, serious injury and death.
Braking and Loss of Control Hazard:
Do not exceed 30 kph.(20 mph) Slow down on rough roads.
Transport Steps
Know your implement weight. If tractor capabilities are
marginal, check actual weight of implement at a scale.
1. Check that implement is securely hitched to a sufficient tractor (page 17).
2. Always use a locking-style hitch pin sized to match
holes in hitch and draw-bar, and rated for the load.
3. Attach safety chain to tractor with enough slack to
permit turning (page 17).
4. Verify correct operation of lights.
5. Instal transport locks (page 27).
6. Check that tires are properly inflated (page 64).
7. Plan the route. Avoid steep hills.
8. Always have lights on for highway operation.
9. Do not exceed 32 kph (20 mph). Comply with all
national, regional and local laws when traveling on
public roads.
10. Remember that the implement may be wider than the
towing vehicle. Allow safe clearance.
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36 8315-8324DVN Great Plains Manufacturing, Inc.
Hitching a Trailing Implement (Optional)
Note: Maximum rear drawbar vertical loading-350kg.
Ensure the 8315, 8318, 8321 & 8324DVN is unfolded.
1. Raise machine to attain a suitable height to attach
the trailing implement.
2. Reverse the 8315, 8318, 8321 & 8324DVN up to the
implement, ensuring that the drawbars are correctly
aligned allowing a slight clearance to enable the
machines to be coupled together.
3. Attach the hydraulic hoses between the 8315, 8318,
8321 & 8324DVN and the implement.
4. Reverse the 8315, 8318, 8321 & 8324DVN and couple the two machines together.
5. Fully raise both machines into the road transport
position. Fold the machine(s) if necessary.
Final Field Checklists
Use the following tables to develop a final checklist for
your tractor/Discovator configuration.
Mechanical Checklist Page
❑ Discovator hitched 17
❑ Hitch pin locked
❑ Safety chain secured to tractor or leading
implement
❑ Parking jack stowed 19
❑ Check all tire pressures 64
❑ Transport locks and locking valves are in
the field position
❑ Implement unfolded 26
17
26
Ensure that no fouling occurs between the 8315, 8318, 8321 &
8324DVN and the towed machine.
Note: Any tines on the towed machine should be adjusted
so that they do not engage the soil (or should be removed altogether).
Field Operation
This implement is designed to be pulled in the field with
the sweeps engaged (including wide turns). Pulling for
extended distances with sections lifted, or routine lifting
for turns, is not recommended. Lifting for short distances
to clear residue clogs is acceptable. Lifting for tight turns
or reverse moves is required.
Equipment Damage Risk:
Do not pull for extended distances when partially raised.
Do not routinely raise for wide turns. Such practices cause
premature wear of cylinders, pins and frame components. Such
wear is not covered by the warranty.
Equipment Damage Risk:
Lift for tight turns and reverse moves. Tight turns can result in
a section moving backward. Never back up with sweeps on the
ground. If the inside tire stops or rolls backward, the turn is
tight and requires lift
Hydraulic System Checklist Page
❑ Check tractor hydraulic reservoir full -
❑ Make hydraulic connections 20
❑ Inspect connections for leaks -
❑ Unfold Implement 26
❑ Perform a raise and lower operation 28
Electrical Checklist Page
❑ Verify electrical hookups solid, or connec-
tor securely stowed if not using lights in
field.
19
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Great Plains Manufacturing, Inc. Operating Instructions 37
Perform all steps in “Pre-Start Checklist” on page 23
and “Final Field Checklists” on page 36.
First Pass Operation Checklist Page
1. Implement unfolded and aligned for first
pass, with coulter disks about 3m before
field edge.
2. Pull forward, lower Discovator, and begin
tilling for a short distance.
3. Stop. Assess:
• coulter depth
• shank depth
• finishing attachment operation
4. Make necessary adjustments 37
Sharp Field Turns Checklist Page
1. Raise Discovator 30
2. Make turn
3. Lower Discovator 3m before field edge 29
4. Resume tilling.
24
Do not make short radius turns with the implement in the
ground.
Note: If you stop in the middle of a pass, raise the imple-
ment and back up 3m (10 ft) before resumption of
tilling.
Ending Tilling Checklist Page
1. Suspend operations as above, then
2. Lift implement
3. Set tractor for fold 25
4. Fold wings 25
5. Place locking valves in transport position 29
6. Place transport locks in transport position
7. Lower implement on to transport locks
8. Lights ON for transport
First Time Field Adjustments
Pre-Leveling of Machine
Note: Pre-leveling of machine should be done on a good
level surface.
Front to Rear Leveling
Refer to Figure 28
1. Pre-leveling of machine can be done on a concrete
slab or level surface. Lower machine so sweeps are
5.0-7.5 cm (2-3 in) 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 roe just
slightly deeper or lower than the back.
Figure 28
Hitch Turnbuckle Adjustment
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38 8315-8324DVN Great Plains Manufacturing, Inc.
Side to Side Leveling
Refer to Figure 29
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 30
Disc Gang Depth Calibration
3. Be sure the pre-load is set at 22.23 cm (8.75 in) on the
spring assemblies. Calibrate the depth gauge pointer
by extending cylinder until the under frame clearance
of the 50.8 cm (20 in) blades is 11.43 cm (4.5in). Place
the decal on the stand with the pointer at ‘0’.
Figure 29
Wing Depth Adjustment
Figure 30
Disc Gang Depth Gauge Calibration
41594
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Great Plains Manufacturing, Inc. Operating Instructions 39
Refer to Figure 31
Field Operation of Disc Gangs
4. Adjust the disc or coulter gangs to run 1.27-2.54 cm
(0.5-1 in) 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 45.7 cm (18 in)
blades that are nearing the end of their wear life).
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 cylinder stop at the front of the front of
the unit to maintain a constant depth after raising and
lowering.
7. Make any fine tuning adjustments on the leveling of the
machine.
Figure 31
Disc Gang Field Operation
41600
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.
• Coulter scrapers u-bolts will need loosened and scrap-
ers centered between coulter blades, and torqued to
specs.
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40 8315-8324DVN Great Plains Manufacturing, Inc.
Rear Attachment Settings
Spike Drag Settings
Refer to Figure 32
a. 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.
HD Spike & Reel Settings
Refer to Figure 33
8. 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
9. Adjust nut to where spring is just making contact
with front plate .
10. Turn nut another 1” further on spring rod to set preload on spring .
11. Lengthen turnbuckle to adjust front mini shank to
run more aggressive and shorten to run more passive.
3 4
5
3 6
4
7 8
Figure 32
Spike Drag Settings
41235
5
7
4
6
3
8
1
2
Figure 33
HD Spike & Reel Settings
42221
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Great Plains Manufacturing, Inc. Operating Instructions 41
Coil Tine Settings
Refer to Figure 34
b.On coil tine drags start with the top eyebolt (1) cen-
tered. Then level drag mainframe (2) by changing
position of leveling bolts (3). 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 (4) on each end and move
strap adjustment by pushing the handle (5) forward.
The strap has 5 holes arm 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 (1) on the top bracket.
Depending on the amount of down pressure, you
may need to re-level the mainframe.
Reel Settings
c.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 34
Coil Tine Settings
41373
Parking
Follow these steps when parking the implement for periods
of less than 36 hours. For longer periods, see Storage, the
next topic.
1. Position the implement on firm, level ground.
2. Raise, fold and lock implement (page 28 and page 24).
Note: Static tongue weight of a loaded, lowered, and
unhitched implement can be as much as 500 kg
(1100 lb))
Refer to Figure 35
3. Remove jack from storage position and pin securely
to lifting stob on outside of implement tongue . See
“Hitching Tractor to Discovator” on page 17.
4. If ground is soft, place a wide block or plate under the
jack to increase contact area.
5. Securely install chock blocks to prevent jack from digging or sliding off plate.
6. For dual line air brakes, disconnect the red (control)
gladhand connector first, at the tractor, then the blue
supply connector, and store each connector in its
matching color-coded gladhand holder on the implement.
7. Un-hook electrical lines and protect with any plugs or
caps provided.
1
2
1
2
Figure 35
Jack (Parking)
8. Release pressure on hydraulic system, then disconnect hydraulic lines and pull all lines back onto implement tongue. Store hoses ends in keyholes of hose
holder bracket.
9. Disconnect hydraulic brake line (option).
10. Disconnect the safety chain.
11. Unhitch from tractor or leading implement.
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42 8315-8324DVN Great Plains Manufacturing, Inc.
Storage
Store the implement where children do not play. If possible,
store inside for longer life.
12. Raise, fold and lock implement (page 28 and page 24).
For unfolded storage, see steps at right.
13. Perform Parking checklist (page 41).
14. If equipped with optional air/hydraulic brake system,
drain water from reservoir (page 46).
15. Lubricate the implement at all points listed under
“Lubrication and Scheduled Maintenance” on
page 45.
16. Check all bolts, pins, fittings and hoses. Tighten, repair
or replace parts as needed.
17. Check all moving parts for wear or damage. Make
notes of any parts needing repair or replacement
before the next season.
18. Lubricate all points listed in Maintenance to prevent
rust.
19. Clean Discovator of mud, dirt, excess oil and grease.
20. Grease exposed cylinder rods to prevent rust.
21. Use touch-up paint to cover scratches, chips and worn
areas to prevent rust.
Unfolded Storage
See page 27 for details on maintenance lock.
12a.Raise implement.
12b.IVerify the transport locks are in the transport posi-
tion.
12c.Be sure hydraulics are depressurized. Adjust locking
valves to the open position. Unfold wings until wing
is resting on shims.
12d.Lower implement onto lock channels.
12e.Set all hydraulic remotes to Float.
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Great Plains Manufacturing, Inc. 43
Maintenance and Lubrication
Proper servicing and maintenance is the key to long implement life. With careful and systematic inspection, you can
avoid costly maintenance, downtime and repair.
Always turn off and remove the tractor key before making any
adjustments or performing any maintenance.
Crushing Hazard:
You may be severely injured or killed by being crushed under a falling implement. Always use transport locks when working near or
under a raised implement.
High Pressure Fluid Hazard:
Escaping fluid under pressure can have sufficient pressure to penetrate the skin. Check all hydraulic lines and fittings before applying
pressure. Fluid escaping from a very small hole can be almost invisible. Use paper or cardboard, not body parts, and wear heavy
gloves to check for suspected leaks. If injured, seek immediate medical attention from a health care provider familiar with this type of
injury.
After using implement for several hours, check all bolts to be
sure they are tight.
1. Securely lock up implement before working on it.
2. Lubricate areas listed under “Lubrication and Sched-
uled Maintenance” on page 45.
3. Check for air leaks at hose connections.
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. Inflate tires as specified on “Tire Inflation Chart”on
page 64.
6. Replace any worn, damaged or illegible safety
decals. Order new decals from your Great Plains
dealer. “Safety Decals and Lights” on page 10.
7. 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.
8. Replace or rotate worn parts as needed -- hinge
bolts, clevis pins, bearings, sweeps, shanks, etc.
Boron disc blades cannot be rolled to sharpened,
they must be ground. Cracks and breakage will
occur if rolled.
9. 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.
10. Check drag bolts for loosness or excessive wear.
Replace broken or bent teeth. Your drag is an important part of the tillage operation.
11. 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.
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44 8315-8324DVN Great Plains Manufacturing, Inc.
Maintenance Lift Lock
Crush and Pinch Hazards; Equipment Damage Risk:
Do not rely on hydraulics to hold the implement at lift. Use the
transport locks provided. Unlocked lift cylinders settle over time.
Implement sections can crush anyone working under them. Implement links can pinch or crush anyone working near them.
Locks are provided to hold all implement in raised position
for maintenance, and for raised unfolded storage. The transport locks are used for routine transport.
Steps to install locks presume a starting configuration of
implement unfolded and lowered:
1. Raise the unfolded implement.
Refer to Figure 36
2. Install the transport locks. Remove the transport
1
locks from the tube on inside of center frame and pin
to cylinder rods .
2
1
Maintenance Lift Unlock
1. Raise the implement.
2. Remove the transport locks . Return them to storage
1
.
3. To fold, see folding (page 25).
4. Lower the implement.
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:
2
2
Figure 36
Transport Locks
Product Support
Great Plains Mfg. Inc., Service Department
PO Box 5060
Salina, KS 67402-5060
(800)255-9215
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Great Plains Manufacturing, Inc. Maintenance and Lubrication 45
Lubrication and Scheduled Maintenance
Multipurpose
spray lube
Multipurpose
grease lube
Wheel Bearing Hub
50
1 zerk on each hub;
4 total
Type of Lubrication: Grease
Quantity: Sparingly, Do Not Over Grease, nay cause
damage seal.
Repack wheel bearings annually or every 2500 acres.
All Hinge Points
10
Multipurpose
oil lube
41622
Intervals (service hours)
at which lubrication is
50
required
On all hinge points
Type of Lubrication: Grease
Quantity: Until grease emerges
21960
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46 8315-8324DVN Great Plains Manufacturing, Inc.
Brake Maintenance (Option)
Brakes are self-adjusting, but there are several maintenance items:
page 46 - Brake Line Charge and Bleed
page 48 - Air Brake Filter Cleaning
page 48 - Brake Drum and Liner Maintenance
Brake Line Charge and Bleed
Prior to first use, and after replacing any components
that carry brake fluid, and during periodic flushing of the
brake system, the brake lines need to be bled.
1. Spot the machine on a level surface at a safe distance from any ignition sources (brake fluid is flammable). Unless conditions are dry and calm, use a
sheltered area, to keep moisture and contaminants
out of brake fluid. Leave the tractor hitched to provide braking action to systems.
2. Unfold the machine and block the machine tires to
prevent movement. Do not set the machine’s own
parking brakes, as this restricts cylinder movement.
3. Put tractor in Park. Do not set tractor parking brake if
it also operates trailer brakes.
Refer to Figure 37 (which depicts air brake system - reservoir
for hydraulic brake system is similar)
4. Clean and dry top of master cylinder reservoir .
5. Remove cap and keep free of contaminants.
1
Never re-use brake fluid. It is hygroscopic (formulated to
absorb water, which can damage system components if not
removed). Dispose of brake fluid per supplier instructions.
1
Figure 37
Brake Master Cylinder
41874
2
Drain Hydraulic Brake Lines
6. If draining brake system:
A. Remove drain plug at rear of reservoir and empty
reservoir. Re-secure plug.
B. Start at an outside hub for the following steps.
C. Connect recovery tubing to the bleeder valve ,
Refer to Figure 38, above the brake line. Unscrew
valve to open line.
D. Operate tractor brakes to cycle machine system.
Continue until no fluid flows at hub.
E. Close valve, and repeat step C and step D for the
other outside hub, then the inside hubs.
Refer to Figure 39 (which depicts air brake system - tee for hydraulic brake system is similar)
F. Disconnect center port of brake line tee . Cycle
brakes until no fluid flows. Re-secure tee.
2
3
Figure 38
Brake Cylinder Bleeder Valve
Figure 39
Brake Line Tee
29585
3
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Great Plains Manufacturing, Inc. Maintenance and Lubrication 47
Charge and Bleed System
Refer to Figure 40
7. Fill the reservoir with brake fluid, grade:
1
DOT3 / SAE J1703, or
DOT4 / SAE J1704 / FMVSS 116, or
DOT5.1
System capacity: less than 1 liter
1
Do not use brake fluid:
DOT5 / SAE J1705
DOT5 and DOT5.1 are completely different fluids.
DOT5.1 is compatible with the braking system.
DOT5 is not.
If there is any chance of confusion in your shop, use DOT3 or
Figure 40
Brake Master Cylinder
41874
DOT4.
8. Screw cap on master cylinder reservoir. Start at an
outside hub for step 9.
Refer to Figure 41
9. Unscrew bleeder valve above brake to open line.
2
2
10. Cycle brakes on tractor. Close valve near end of
brake pedal stroke to prevent air from entering at
valve. Check fluid level at reservoir. Top-off as
needed to keep full.
11. When fluid appears at valve, close valve.
12. Repeat step 9 through step 11 for the other outside
hub, then the inside hubs.
Figure 41
29585
Brake Cylinder Bleeder Valve
Refer to Figure 42
13. At brake line tee , loosen center port connection
3
just enough to allow air to escape when system is
pressurized, but not enough to allow air to enter.
14. Cycle tractor brakes until no air bubble appear at
connection. Tighten connection.
15. Top off master cylinder reservoir.
Figure 42
3
41873
Brake Line Tee
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48 8315-8324DVN Great Plains Manufacturing, Inc.
Air Brake Maintenance
Reservoir Draining
Prior to storage, or daily in humid operations, drain water
from the air brake reservoir tank to prevent rust inside
the tank, and rust contamination of the brake valve system.
1. Set the machine hand brakes.
2. Hold the petcock open until no water flows. Close
petcock.
Air Brake Filter Cleaning
Refer to Figure 44 and Figure 45
The air brake system includes filters on both the supply and service lines, to trap any debris introduced during connection and disconnection.
Clean filters seasonally; more often in dusty conditions.
1. Move the machine to a sheltered area, to prevent
unfiltered dust from entering the opened air system.
2
1
1
2
2
Figure 43
Air Brake Reservoir
41874
Do not remove the valve system to clean filters. Caps must be
on bottom of filter when removed.
2. Use a 33mm (1
to loosen both red filter caps .
Note: There is generally insufficient clearance between
the filters for a socket or box-end wrench.
3. Carefully remove the cap from one filter. Be ready to
catch the filter screen when it falls free.
Handle the filter screen element very gently. Great Plains
offers only complete replacement filters, and not screen elements.
Note: The inside diameter of the screen is the inlet side.
The screen is entirely welded stainless steel.
4. Using gentle compressed air, or a soft brush and
compatible cleaning fluid, remove debris from the
screen. Dry thoroughly.
5. The cap is a debris sump. Clean it with air, or water
and mild detergent. Clean and inspect the O-ring .
Dry the cap if wetted.
6. Center the filter screen on the cap. Carefully reinsert in filter body. Screw cap in, checking for misalignment or binding of filter element. Tighten cap
gently with wrench.
7. Repeat step 3 through step 6 for the other filter.
9
⁄
in) open-end or adjustable wrench
32
3
4
5
2
3
Figure 44
Brake Master Cylinder
41874
3
2
4
3
5
Figure 45
Air System Filter Screen
29592
Brake Drum and Liner Maintenance
Great Plains recommends having brakes serviced by trained and fully equipped brake technicians.
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Great Plains Manufacturing, Inc. Maintenance and Lubrication 49
Procedures for Servicing Brakes
• Service the removed brake assembly in a negative
Non-Asbestos Fibers Hazard:
Most recently manufactured brake linings are asbestos-free.
However, non-asbestos brake linings may contain one or more
of a variety of ingredients, including glass fibers, mineral
wool, aramid fibers, ceramic fibers and silica that can be
health risks if inhaled.
pressure enclosure. The enclosure should be
equipped with a HEPA vacuum and worker arm
sleeves. With the enclosure in place, use the HEPA
vacuum to loosen and vacuum residue from brake
parts.
• Alternatively, use a catch basin with water and a biodegradable, non-phosphate, water-based detergent to
Scientists disagree on the extent of the risks from exposure to
these substances. Exposure to silica dust can cause silicosis, a
non-cancerous lung disease. Silicosis gradually reduces lung
capacity and efficiency and can result in serious breathing difficulty. Some scientists believe other types of non-asbestos
fibers, when inhaled, can cause similar diseases of the lung.
Silica dust and ceramic fiber dust are known to the State of
California to cause lung cancer. U.S. and international agencies have also determined that dust from mineral wool,
ceramic fibers and silica are potential causes of cancer.
For silica, OSHA has set a maximum allowable level of
exposure of 0.1 mg/m
3
, 8-hour time-weighted average.
Some manufacturers of non-asbestos brake linings recommend that exposures to other ingredients be kept
below 1.0 f/cc, 8-hour time-weighted average.
Scientists disagree, however, to what extent adherence
to these maximum allowable exposure levels will eliminate the risk of disease that can result from inhaling nonasbestos dust.
The following procedures for servicing brakes are recommended to reduce exposure to non-asbestos fiber dust,
a cancer and lung disease hazard. A Material Safety
Data Sheet (MSDS) is available from Federal Mogul Friction Products, U.S. telephone (540) 662-3871. Request
MSDS WNRE-05-155-4.
Use caution to avoid creating, breathing or ingesting dust
when servicing brakes. Check for applicable laws, regulations and insurance/enterprise policies prior to commencing work.
Recommended Work Practices
Separate Work Area - Service brakes in an area where
these precautions are always taken for all work. Wear
clothes used only for brake work.
Respiratory Protection - Wear a respirator equipped
with a high-efficiency (HEPA) filter approved by NIOSH
or MSHA for brake work.
wash the brake drum and other brake parts. Apply the
solution with low pressure to prevent dust from becoming airborne. Allow the solution to flow between brake
drum and brake support. Thoroughly wet the wheel
hub and brake assembly components to control dust,
prior to removal of brake shoes. Wipe parts clean with
a cloth.
• If an enclosed vacuum system or brake washing
equipment is not available, carefully clean the brake
parts in open air. Use a fine mist from a pump spray
bottle to wet parts. Use a solution containing water,
and, if available, a biodegradable, non-phosphate,
water-based detergent. Thoroughly wet the wheel hub
and brake assembly components to control dust, prior
to removal of brake shoes. Wipe parts clean with a
cloth.
Dust Control - Use only HEPA-equipped vacuum cleaners. Never blow dust with an air gun. Do not dry brush
parts.
Cleaning Fluids - NEVER use carcinogenic solvents,
flammable solvents, or solvents that can damage brake
components as wetting agents.
Work Area -. Clean work areas with a HEPA-equipped
vacuum cleaner or by damp wiping. NEVER use an ordinary shop vac, compressed air or dry sweepers.
When replacing a HEPA filter, wet the used filter with a
fine water mist. Bag and carefully dispose of the used filter.
Hygiene - Wash hands immediately after brake work,
and before eating, drinking or smoking. Clean clothes
with a HEPA-equipped vacuum before removing them.
Keep food and drink out of the work area.
Shower after work. Do not wear work clothes home. Use
a vacuum equipped with a HEPA filter to vacuum work
clothes after they are worn. Launder them separately.
Waste Disposal - Dispose of discarded linings, used
rags, cloths and HEPA filters with care, such as in sealed
and labeled plastic bags. Consult applicable EPA,
Wear respiratory protection at all times during brake servicing (including grinding or machining brake drums),
beginning with the removal of the wheels, through shop
cleanup after completion of brake work (including emptying vacuums, changing HEPA filters and rag disposal).
national, regional and local regulations on waste dis-
posal.
Regulatory Guidance - OSHA, NIOSH, MSHA, and
EPA, are regulatory agencies in the United States. These
references are to provide further guidance to employers
and workers employed within the United States. Employ-
ers and workers employed outside of the United States
should consult the regulations that apply to them for fur-
ther guidance.
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50 8315-8324DVN Great Plains Manufacturing, Inc.
Brake Shoe Replacement
Check brakes for wear, contamination and damage seasonally or every 9600 km (6000 miles).
1. Prior to commencing work, review the safety information on page 48. Have necessary safety equipment
and tools on hand. Make sure workers understand
the hazards and how to avoid them.
2. Review the entire procedure. Great Plains suggests
performing a complete operation on one wheel, or
one pair of wheels, at a time, so that there are fullyassembled wheels to use as an assembly reference.
3. Spot the machine on a level surface. Unfold the
machine.
4. Block the wing and rear machine tires to prevent
movement. Do not set the machine’s own parking
brakes, as the drums cannot be removed with the
brakes set.
Refer to Figure 46
5. If left hitched, put the tractor transmission in Park,
release tractor service and parking breaks, and disconnect the trailer brakes at the hitch. Set tractor
parking brake only after trailer brake disconnection.
Possible Asbestos Hazard:
If you are unable to confirm that you are removing and installing Great Plains approved parts, you may have linings that
contain asbestos. Some aftermarket brake shoes may contain
asbestos, and require strict, complex and costly safety procedures not covered in this manual.
If shoe replacement is indicated, use only parts supplied or
recommended by Great Plains. The original brake linings, and
Great Plains supplied or approved linings contain no asbestos.
Unapproved parts may also appear to fit, but will not function
correctly.
Note: Inspection of the brakes may also reveal a need to
refinish drums and/or replace other brake parts. Although not strictly part of brake maintenance, you
may need to repack bearings (generally the outer),
and it may be necessary to replace a worn or damaged inner seal (and repack the inner bearing).
If unhitched, release air brakes by opening dump
1
valve . Pull down on cap to release. Push up.
6. Jack up and support one or both machine transport
axles.
7. Be wearing and using recommended safety equipment for the remainder of these procedures.
8. Spin the wheels, checking for evidence of excess runout at the braking surface of the drums.
9. Remove wheels. If you have more than one wheel
removed at a time, mark on them where they came
from (L/R and inside/outside), as the tire tread pattern
is directional.
Refer to Figure 47
10. Remove hub/drum assemblies:
Remove the dust cap .
Remove the spindle cotter pin .
Remove the spindle nut .
Remove the spindle washer .
11. Carefully pull hub and drum assembly from spindle. Outer bearing may fall loose.
12. Inspect inner seal , bearings, hub and drum for
wear and damage - for drum, see “Brake Drum
Maintenance” on page 54).
13. Keep inner and outer bearing components separated. They are different parts.
2
3
4
5
6
7
8
1
Figure 46
Air Brake Dump Valve
41874
6
8
7
Figure 47
Hub Removal
5
4
2
3
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550-466M 11/25/2013
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Great Plains Manufacturing, Inc. Maintenance and Lubrication 51
Refer to Figure 48
14. Inspect brake shoe origin. See Warning at right.
Great Plains supplied shoes are stamped “AL-KO”
on the web face and have bonded linings.
15. Clean brake dust from assembled parts, and from
individual parts as removed.
16. Inspect brake linings . Check for 1.6mm (
minimum thickness (exclude thickness of shoe pad),
and absence of grease, contamination, deep scores,
chipping, or excessive heat fractures. Hairline heat
fissures are not unusual and do not require shoe
replacement.
17. Inspect brake shoe retaining and operating hardware. Check for wear or damage to holes, pins and
springs. Check for weak springs. Springs must completely retract shoes when brakes are released.
Note: Sound practice is to replace springs when replac-
ing brake shoes.
18. Check wheel cylinder for evidence of leaks.
If no parts need replacing, skip to step 48.
Refer to Figure 49
19. Remove self-adjuster cotter pins . Release selfadjuster pawl and remove adjuster .
20. As necessary, disassemble adjuster for cleaning.
Inspect adjust pawl and rack for wear and damage.
Great Plains recommends replacing the entire
adjuster if any parts are worn or damaged.
21. Apply thin film of Lubriplate® 110 or similar to selfadjuster.
8
9
1
2 3
8
9
1
⁄
in)
16
Figure 48
Brake Shoe ID & Thickness
Part Failure Hazard:
Do not substitute parts. Incorrect or substandard parts can
cause brake malfunction or failure, resulting in death, serious
injury or property damage. Always re-assemble brakes with
either the removed parts (if serviceable) or Great Plains parts
as specified in the Parts Manual (550-466P).
29643
6
4
9
2
Do not allow any lubricants to come in contact with new brake
linings.
22. Release upper spring between shoes (was under
self-adjuster), and release lower spring between
shoes.
23. Loosen nuts on lower shoulder bolts. Push brake
shoes outward at bottom (to allow removal of hand
brake arms).
24. Disconnect hand brake line by uncoupling the brake
arm link at the clevis pin (not shown).
25. Release lower spring between hand brake arms.
If this spring differs from the shoe springs, set the
parking brake spring aside.
26. Remove hand brake arm assembly . Place
spring with it.
11/25/2013 550-466M
6
7
8
4
5
7
8
9
8
5
Figure 49
Brake Spring Removal
3
1
29642
Page 56
52 8315-8324DVN Great Plains Manufacturing, Inc.
Refer to Figure 50
27. Remove five
behind dust shield.
28. Pull backing plate assembly far enough out on
spindle, away from dust cover , to allow access to
5 6
nuts on the two shoe hold down bolts .
Note: If you prefer to perform a bench repair on the
brakes, and wish to avoid opening the hydraulic
system, remove the bolts holding the wheel cylinder. This allows complete removal of the backing
plate.
29. Remove hold down cotter pins and castellated
5
nuts .
30. Remove spring washers .
Note the orientation of these washers. They must be
re-installed in the same relationship to each other,
and to the nut/washer, in order to provide correct
spring force.
31. Remove large flat washer .
32. Remove hold down bolts and brake shoes .
33. Inspect brake shoes. Check that web is flat and at a
right angle to table. Check welds for cracks. Check
operating holes for wear and peening. If any defect
or damage is noted, replace shoes regardless of lining status.
34. Replace any shoes contaminated with oil.
35. If replacing one shoe set due to normal wear, Great
Plains recommends replacing all shoes on the
machine.
1
⁄
-13 nuts and lock washers
2
1 2
3
4
7
8
9
6 s
5
8
7
8
1
9
s
2
3
4
Figure 50
Brake Shoe Removal
Braking Malfunction Hazard:
Always replace brake shoes in pairs - both shoes on the same
drum. Replacing only one shoe of each set can lead to reduced
braking performance, or loss of braking, with the risk of an
accident resulting in death, serious injury or property damage.
Note: Cannot Re-Line:
Original and replacement brake shoes supplied or
recommended by Great Plains have bonded linings. They cannot be re-lined. Replace entire
shoes, in pairs.
6
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550-466M 11/25/2013
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Great Plains Manufacturing, Inc. Maintenance and Lubrication 53
Install New Brake Shoes
Refer to Figure 51
Brake shoe orientation is with square hold-down bolt
2 3
hole on top, and “L”-shaped adjuster mount lugs
facing away from spindle.
36. Engage bottom web notch of shoe with backing plate
pivot bolt . Apply a thin film of Lubriplate® 110 or
similar to that part of the web which is near and
under the plate held by the pivot bolts. Engage top
web notch of shoe with cylinder rod clevis .
37. Loosely secure shoe to backing plate with shoe
hold down bolt , large flat washer , two spring
washers , and castellated nut . Do not install the
cotter pin at this time.
Note: The spring washers are slightly cupped. Place
them on the bolt with the concave (dished-in) sides
facing each other “()”.
38. Tighten the castle nuts until the spring washers
are flattened. Back the nut off 1/6 turn, plus enough
to align the bolt’s hole with notches in the nut.
Secure castle nuts with cotter pin .
39. Insert five backing plate studs through dust cover
and spindle weldment. Secure with lock washers
and
Re-Install Springs
Refer to Figure 52
40. With link arm toward front of machine, insert parking brake arm assembly from spindle side of backing plate, through lower slots in brake shoes.
41. Insert double-bend end of parking brake spring in
hole at rear end of parking brake arm. Hook singlebend end at small notch in forward arm.
42. At adjuster lugs (top of shoes), insert the doublebend end of a brake shoe spring through the hole
closer to the shoe web. Hook the single-bend end
through the matching hole on the other shoe.
43. Hook the double-bend end of the remaining spring
through a lower round hole in a shoe web. Hook
the single-bend end through the matching hole in the
other shoe.
44. Place adjuster assembly on adjuster lugs . The
adjuster pawl is up and to the right as you face the
spindle. Secure with cotter pins .
45. Tighten pivot bolts to
1
6 7
8 9
1
⁄
-13 nuts .
2
d
1
4
9
b
4
5
8
9 8
a
2
3
5
7
8 4
a
5
⁄
-18 torque specification.
8
b
c
6
a
d
4
c
b
b
2
1
9
8
8
7
5
1
Figure 51
Install Brake Shoes
4
7
3
6
Figure 52
Re-install Brake Springs
3
2
6
29642
5
9
8
a
29642
Leave self-adjuster relaxed. It self-adjusts at first use.
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54 8315-8324DVN Great Plains Manufacturing, Inc.
Brake Drum Maintenance
Refer to Figure 53
46. Inspect the shoe surface (the inside rim). Normal
appearance is dull gray, with no more than light scoring and light wear.
One or two light score marks are not cause for resurfacing or replacement. If there are any questions
concerning the condition of a drum, consult an
expert.
Replace or resurface a drum that is heavily scored,
worn to more than 0.51mm (0.020in) oversize, or has
0.38mm (0.015in) or greater run-out.
Brake Drum Resurfacing
47. A standard drum lathe is suitable for machining the
shoe surface.
When removing surface, do not exceed the maximum diameter cast in the brake drum.
Be sure to remove any metallic chips and contamination
resulting from drum machining.
Wear a respirator equipped with a HEPA filter approved by
NIOSH or MSHA when grinding or machining brake drums. In
addition, do such work in an area with a local exhaust ventilation system equipped with a HEPA filter.
Figure 53
Brake Drum
29635
Re-Mount Hub and Drum
Refer to Figure 54
48. Repack any bearings removed.
49. If replacing inner bearing seal , orient it with the
seam side out (away from bearing). Seat the seal so
that it is completely inside the narrow diameter of the
hub, and close to, but not touching the bearing
2
cup .
Seals are hollow metal structures and are somewhat fragile.
The are not intended to be in contact with the bearings. When
installing them, carefully align them so they are concentric
with the shaft hole. Apply insertion force across the entire face,
or at least equally along the entire outside diameter (as close
to the seal O.D. as possible).
50. Carefully place drum/hub assembly on spindle.
51. Insert re-packed outer bearing .
52. Add spindle washer and castle nut .
53. Tighten nut until drum/hub does not turn freely.
Loosen nut
align hole in spindle (not shown) with notches in nut.
54. Secure nut with cotter pin . Install dust cap .
1
⁄
6
5 6
turn, and as much looser as needed to
1
3
4
7 8
Heavily scored, worn or oversized drums can reduce brake
performance or cause loss of braking. This could result in
death, serious personal injury, or property damage.
Failure to remove chips can cause bearing failure, brake failure or wheel/spindle separation. This could result in death,
serious personal injury, or property damage.
1
2
Figure 54
Re-mount Hub and Drum
3
4
5
6
7
8
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Great Plains Manufacturing, Inc. Maintenance and Lubrication 55
Mounting Wheels
55. Position a wheel on the hub from which it was dismounted.
Refer to Figure 55
56. Start all lug nuts by hand. Choose a bolt stud to designate position #1.
57. Torque in stages, setting each lug nut to the specified torque in the order shown in the figure:
Stage 1: 27-33 N-M (20-25 ft-lbs)
Stage 2: 74-80 N-M (55-60 ft-lbs)
Stage 3: 114-127 N-M (85-95 ft-lbs)
Note: This staging and ordering of tightening is strongly
recommended to ensure that the drum is not driven
out-of-round.
58. Repeat step 56 and step 57 for each wheel.
8
1
6
4
Figure 55
Bolt Torquing Pattern
3
7
5
2
29645
Test and Adjust Brakes
While the machine axle is still elevated, test both the service and the parking brake systems.
59. Hitch a tractor equipped with trailer brake remote.
Connect the braking systems. Put the tractor in Park,
but release any brakes that operate the trailer service brakes.
60. Have someone spin one brake-equipped machine
wheel, and stand clear.
61. Slowly engage the tractor service brakes. If the
wheel does not stop spinning, this may merely indicate that the self-adjusters have not yet seated.
Cycle a second time.
62. Check for unusual noises and failure to brake. Check
that the wheel spins freely with brakes released.
63. Spin another machine wheel. Stop it with the tractor
brakes. Check braking action. The self-adjusters
may already be seated for this and the remaining
wheels.
64. Release all tractor braking that engages machine
braking.
65. Spin the first wheel again. Engage the machine parking brake for that side. With fresh brake linings, it
may be necessary to adjust the hand brake handle to
achieve over-center brake-set detent with acceptable
effort.
66. Spin and test brake the other wheel on that side.
67. Repeat step 65 and step 66 for the other side of the
machine.
68. Check tire inflation, set parking brakes, and lower
machine onto its own wheels.
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56 8315-8324DVN Great Plains Manufacturing, Inc.
Troubleshooting
General Performance
Problem Cause Solution
Rear Shanks Leaving
Groove
Leaving Ridges On
The Outside
Wings Not Penetrating Wings not level.
One Wing Running
Deeper Than The
Other
Both Wings Running
Too Deep
Whole Machine Runs
Deeper
Center & One Wing
Run 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.
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.
Leaking master lift cylinder. Repair or replace leaky cylinder, See pages
Level machine from front to rear with turnbuckle, See “Front to Rear Leveling” on
page 37
Raise disc gangs.
Reset drag, See “Rear Attachment Set-
tings” on page 40.
Slow down (9-11 km/h)/(6-7 m/h).
Adjust eyebolt at rear of wing cylinders to
level wings. See “Side to Side Leveling”on
page 38.
Rephase lift cylinders.
Repair or replace leaky cylinder, See pages
34-37 of “Parts Manual”.
Reset drag, See “Rear Attachment Set-
tings” on page 40.
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 38.
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 38.
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 Chart”
on page 64.
Adjust eyebolt at rear of wing cylinders to
level wings. See “Side to Side Leveling”on
page 38.
Set air pressure, See “Tire Inflation Chart”
on page 64.
Replace cartridge.
Repair or replace leaky cylinder, See pages
26-27 of “Parts Manual”.
26-27 of “Parts Manual”.
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Great Plains Manufacturing, Inc. Troubleshooting 57
General Performance
Problem Cause Solution
Machine Plugging 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.
Machine Bouncing
Uneven Working
Depth
Overheating Hydraulic System
Operating speed too fast. Slow down (9-11 km/h)/(6-7 m/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.
Coulter/Disc Gang Performance
Problem Cause Solution
Coulter/Disc Blades
Do Not Penetrate
Coulter/Disc Gangs
Are Plugging
Entire Coulter/Disc
Gang Depth Changes
Wing Coulter/Disc
Gangs Coming Out Of
Ground
Center Gang Section &
One Wing Gang Section
Blades too dull.
Improper spring preload.
Scrapers are not set properly.
Gangs are running too shallow.
Gangs are running too shallow.
Ground too wet.
Gang circuit leak in tractor Completely extend/re phase cylinders peri-
Leaking slave cylinder on same side as
wing.
Leaking master cylinder opposite of the
wing gang section.
Raise coulter/disc gangs.
Level machine front to rear with turnbuckle,
See “Front to Rear Leveling” on page 37.
Run at a slight angle to the rows.
Check for sharpness.
Check shank layout for proper shank placement.
Speed up (9-11 km/h)/(6-7 m/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.
Sharpen blades (if applicable).
Raise disc gangs.
Reset spring preload, See “Disc Gang
Depth Calibration” on page 38.
Set scraper according to specs, See
“Scraper Settings” on page 39.
Increase gang depth or raise completely.
Fix leaking gang cylinder, See pages 30-31
of “Parts Manual”.
Allow ground to dry some.
odically.
Repair or replace leaky cylinder, See pages
30-31 of “Parts Manual”.
Repair or replace leaky cylinder, See pages
26-27 of “Parts Manual”.
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58 8315-8324DVN Great Plains Manufacturing, Inc.
Sweep/Shank Performance
Problem Cause Solution
Uneven Sweep Depth
Across Working Width
Sweep’s Front Wearing Faster Than Rear
Sweep’s Rear Wearing Faster Than Front
Magnum Shank Excessive Wear In Pivot Bolt
Twisted K-Flex Turning while machine in the ground. Raise the machine out of the ground when
Opening K-flex Shank Turning while in the ground.
Bottom C-shank Bending
Wings not level.
Leaking lift cylinder.
Improper tire pressure.
Machine nose down front to rear. Level machine front to rear with turnbuckle,
Machine nose up front to rear. Level machine front to rear with turnbuckle,
Loose pivot bolt. Tighten pivot bolt, See pages 42-45 of
Backing up while in the ground.
Running too deep/fast.
Improper shank.
Adjust eyebolt at rear of wing cylinders to
level wings. See “Side to Side Leveling”on
page 38.
Repair or replace leaky cylinder, See pages
26-27 of “Parts Manual”.
Set air pressure, See “Tire Inflation Chart”
on page 64
See “Front to Rear Leveling” on page 37.
See “Front to Rear Leveling” on page 37.
“Parts Manual”.
turning.
Raise the machine out of the ground.
Raise the machine out of the ground.
Reduce working depth/speed.
Switch to Magnum Shank
Transport
Problem Cause Solution
Wings Fail to Unfold Hydraulic hose disconnected.
Failed hydraulic hose tip.
Transport locks engaged.
Wings Fail To Fold Hydraulic hose disconnected.
Failed hydraulic hose tip.
Low hydraulic pressure.
Folds/Unfolds Too
Slow
Folds/Unfolds Too
Fast
Lift Circuit immobilized
Lift Will Not Go Down Transport locks engaged.
Machine Bouncing
During Transport
Failed hydraulic hose tip. Replace tip.
Cylinder orffices removed. Replace orffices in cylinder ports.
Rebound valve locked. See dealer.
Depth stop engaging.
Failed poppet valve in depth stop.
Depth stop failing due to hose routing.
Excessive speed. Slow down (30 km/h)/(18 m/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 in “PreDelivery or Assembly Manual”.
550-466M 11/25/2013
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Great Plains Manufacturing, Inc. Troubleshooting 59
Brakes (Option)
Problem Causes Solutions
Smoke or odd burning
odor from axle area
Braking insufficient,
one wheel
Braking insufficient, all
wheels
No braking, one wheel Bleed port open Close port. Re-charge and bleed system.
No braking, all wheels Rule out problems at brake assemblies Check parking brake system. If doesn’t work
Overheated brakes, typically on long steep
hills
New brakes may exhibit slight smoking or
odors until linings seat on drums.
Tire under-inflated. Inflate all tires to specification.
Worn brake linings and/or drum Service brakes.
Worn or leaking brake cylinder Rebuild or replace cylinder.
Grease or oil on linings Correct problem causing contamination. Ser-
Brake adjuster not adjusting Ice or dried mud can freeze mechanism.
Air in machine brake lines Check for loose fittings. Check for damaged
Air/Hydraulic system: damaged diaphragm
in booster chamber
Air/Hydraulic system: leaks in air system Repair leaks.
Air/Hydraulic system: clogged filters Clean filters (page 48).
Air/Hydraulic system: valve open Close dump valve (page 50).
Hydraulic/Hydraulic system: air in brake line
from tractor
Brake linings and/or drums worn Service brakes.
Brake linings replaced with unapproved
parts having inadequate friction rating
Pressure supplied by tractor insufficient 80 psi / 55 kPa minimum for air system.
Brake lining worn or missing Inspect and repair as needed.
Brake cylinder frozen Inspect and repair as needed.
Brake parts broken or missing Inspect and repair as needed.
Loss of fluid in machine brake lines Check for fluid loss at all fittings and bleed
Line(s) to tractor improperly connected Check connections.
Trailer brake system disabled or malfunction-
ing in tractor
Tractor line pressure insufficient Have dealer check pressure at port.
Stop immediately. Wait for brakes to cool
completely. Moderate downhill speed by
using lower gear and frequent full stops.
Check brake components for heat distortion.
Check brakes if problem persists, or braking
action is insufficient.
vice brakes.
Check for damage seizing movement. Check
for worn and inoperative pawl, or weak/damaged/missing pawl spring.
fittings and lines. Check for damage or worn
operating components. Correct source of
leak. Recharge and bleed system.
Replace booster.
Close petcock (page 50).
Bleed and recharge brake line.
Replace shoes with approved parts.
either, the problem is likely in the hubs. If
parking brakes do work, the problem is likely
above the hubs.
ports. Close/repair, recharge and bleed.
Check function with another trailer.
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60 8315-8324DVN Great Plains Manufacturing, Inc.
Problem Causes Solutions
Machine pulling to one
side
Brakes always
engaged, all wheels
Dragging brake Over-extended adjuster Reset adjuster. Inspect to discover why it
Brakes grab, chatter or
rattle
Flat spots on tires See ““Brakes always engaged, all wheels”
Squealing from brakes Worn brake linings Check brakes. Replace worn linings
Parking brakes partially or fully engaged on
that side
Release parking brakes on both sides prior
to movement.
See “Dragging brake” topic. Check “wheel lockup” causes before flat
spots develop on tires.
Machine parking brakes on during move-
Release parking brakes prior to movement.
ment
Over-extended adjuster Reset adjuster pawls and allow system to
self-adjust.
Air/Hydraulic system: Tractor air brake lines
Reverse air line connections at hitch.
reversed, and Supply line is causing brakes
to be always on
Hydraulic/Hydraulic system: machine brake
line connected to incorrect always-on
Connect machine brake line to correct
remote.
remote.
Pressure supplied by tractor brake line is
always too high (hydraulic), or too low (air
brake)
Maximum allowed hydraulic pressure is:
150 bar / 2175 psi.
Minimum required air pressure is:
550 kPa / 80 psi
overextended.
Debris in brakes Remove brake shoes. Clean and dry.
Distorted brake parts scraping Replace damaged parts.
Weak return spring Replace all springs.
Piston seized in brake cylinder Rebuild or replace cylinder.
Ice in parking brake lines Warm and release lines. Check lines for
damage. Avoid cold weather movements
until cables are replaced.
Weak return springs Replace all springs.
Drum worn, distorted or out of round Re-surface drum if run-out is within specifi-
cation, otherwise replace.
Under-inflated or undersize tire in pair Replace tire if inflation to specification does
not solve unequal contact problem.
Loose, worn, damaged or missing brake
Inspect brakes.
components in hub
Loose or worn wheel bearings Replace bearings.
(page 50).
Distorted brake parts scraping Check brakes. Replace damaged parts.
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Great Plains Manufacturing, Inc. Troubleshooting 61
Retract Kit (Option)
Problem Causes Solutions
Wing wheels not
retracting or extending
If retract not working. Check that the inline fuse is not blown.
Check that the retract wiring harness is
plugged into keyed power.
Checked that hydraulic lines are connected
properly.
Check that valves and switch are plugged
into appropriate electrical connections.
Check that whisker switch is in the correct
location. See “Assembly Manual” page 49 for
correct placement.
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62 8315-8324DVN Great Plains Manufacturing, Inc.
Appendix
DVN Specifications and Capacities
Model No. 8315DVN 8318DVN 8321DVN 8324DVN
Sweep Width 485cm (15' 11") 554cm (18' 3") 663cm (21' 9") 734cm (24' 1")
Coulter/Disc Width
Number of Sweeps 27 31 37 41
Number of Coulter/Disc
Transport Width w/Retract 300cm (9' 10") 300cm (9' 10") 300cm (9' 10") 300cm (9' 10")
Transport Width wo/Retract
Height 259cm (8' 6") 290cm (9' 6") 328cm (10 9") 375cm (12' 3")
Weight (total)* 3016kg (6650lbs) 3629kg (8000lbs) 4174kg (9200lbs) 4990kg (11000 lbs)
Weight (tongue)** 302kg (665lbs) 363kg (800lbs) 417kg (920lbs) 499kg (1100lbs)
Weight (axle)** 2714kg (5985lbs) 3266kg (7200lbs) 3756kg (8280lbs) 4490kg (9900lbs)
Tire Size Center 12.5LX16.5/G 12.5LX16.5/G 15.5x16.5/G 15.5x16.5/G
Tire Size Wing 12.5LX16.5/G 12.5LX16.5/G 12.5LX16.5/G 12.5LX16.5/G
Kilowatt 85-100 100-115 115-138 138-150
Horsepower 115-135 135-155 155-185 185-200
480cm (15' 9") 544cm (17' 10") 658cm (21' 7") 724cm (23' 9")
24 28 32 36
350cm (11' 6") 325cm (10' 8") 307cm (10' 1") 300cm (9' 10")
* Weight (values change due to installed options and/or after-market equipment)
** Weight values change depending on hitch position from ground
The maximum hydraulic system operating pressure should be 207 bar (3000 psi)
With a continued commitment to constantly improving our products, these specifications are subject to change
without notice
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Great Plains Manufacturing, Inc. Appendix 63
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).
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64 8315-8324DVN Great Plains Manufacturing, Inc.
Tire Inflation Chart
Tire Size Inflation Tire Warranty Information
6.70 x 15”
4-Ply
12.5L x 16.5”
Load G Galaxy
32-15.5 x 16.5”
Load G Galaxy
380/55R x 16.5
Load F RI
221 kPa
32 psi
724 kPa
105psii
793 kPa
115 psi
503 kPa
73 psi
All tires are warranted by the original manufacturer of
the tire. Tire warranty information is found online at the
manufacturer’s web sites listed below. For assistance
or information, contact your nearest Authorized Farm
Tire Retailer.
Manufacturer
Firestone
Gleason
Titan
Web site
www.firestoneag.com
www.gleasonwheel.com
www.titan-intl.com
Hydraulic Connectors and Torque
Refer to Figure 56 (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
1
9
8
4
2
Figure 56
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
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Great Plains Manufacturing, Inc. Appendix 65
Dimensions (Transport) 8315DVN
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Dimensions (Transport) 8318DVN
42207
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Great Plains Manufacturing, Inc. Appendix 67
Dimensions (Transport) 8321DVN
42208
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Dimensions (Transport) 8324DVN
42209
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Great Plains Manufacturing, Inc. Appendix 69
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
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550-466M 11/25/2013
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Great Plains Manufacturing, Inc. 71
Index
A
address, Great Plains ...................... 44
air brake ........................................... 48
air brake filter ................................... 48
air system, braking ........................... 20
AL-KO .............................................. 51
amber reflectors ............................... 12
and ................................................... 24
asbestos .................................. 49
, 50
B
bearings ........................................... 43
bleeder valve, brakes ....................... 46
blue ......................................... 21
bolts ................................................. 43
booster cylinder ................................ 34
brake fluid ............................... 46
brake hook-up .................................. 20
brake linings ..................................... 49
brake maintenance .......................... 46
brake operation ................................ 33
brake shoe .............................. 50
, 34
, 47
, 51
C
Category III ...................................... 18
CAUTION, defined ............................. 5
chain ................................................ 19
checklist
maintenance ............................... 43
parking ....................................... 41
checklists
electrical ..................................... 36
ending tilling ............................... 37
field turns .................................... 37
first pass ..................................... 37
hydraulic system ........................ 36
mechanical ................................. 36
pre-setup .................................... 16
pre-start ...................................... 23
transport ..................................... 32
children ..................................... 6
clevis hitch ....................................... 18
clothing ............................................... 6
coil tine drags ................................... 41
color code, hose ............................... 20
connections, electrical ...................... 19
contact Great Plains ......................... 44
continuous mode .............................. 30
control line, brakes ........................... 21
Coulter scrapers ............................... 39
cushion ............................................. 18
customer service ................................ 4
cylinder rod ...................................... 16
cylinder rods ..................................... 42
cylinder symbols .............................. 20
, 42
D
DANGER, defined .............................. 5
decal replacement ............................ 10
decals
caution
read manual ......................... 15
tire no step ........................... 15
tire pressure ......................... 13
danger
crush .................................... 13
cutting of foot ....................... 15
electrocution hazard ............. 13
notice
transport lock ....................... 15
parking brake ............................. 13
warning
high pressure fluid ................ 14
pinch, hand .......................... 14
speed ................................... 12
wing crush ............................ 14
decal, safety ..................................... 10
definitions .......................................... 4
de-intensifier .................................... 34
differential braking ........................... 21
dimensions transport
8315DVN ................................... 65
8318DVN ................................... 66
8321DVN ................................... 67
8324DVN ................................... 68
directions ........................................... 4
Disc Gang Depth Gauge Calibration 38
Disc Gang Field Operation .............. 39
Disc or Coulter Gang Bearing .......... 45
Disc scrapers ................................... 39
DOT3 ............................................... 47
DOT4 ............................................... 47
DOT5 ............................................... 47
DOT5.1 ............................................ 47
drag bolts ......................................... 43
drum ................................................ 54
drum, brake ..................................... 50
dual-line ........................................... 20
E
electronic timer controls ................... 30
email, Great Plains .......................... 44
F
Federal Mogul .................................. 49
filter, air brake .................................. 48
fire ...................................................... 5
fluid, brake ....................................... 47
flush, brakes .................................... 46
FMVSS 116 ..................................... 47
fumes ................................................. 8
G
Gleason ........................................... 64
H
hd spike & reel drag ......................... 40
headphones ....................................... 6
hearing ............................................... 6
HEPA ............................................... 49
high pressure fluid ............................ 20
high pressure fluids ............................ 6
hills ................................................... 35
Hinge Points ..................................... 45
hitch pin ............................................ 35
Hitch Turnbuckle Adjustment ............ 37
hitching ............................................. 17
hydraulic brake line ..........................22
hydraulic connectors ........................64
hydraulic safety ..................................6
hydraulic, braking ............................. 20
I
Important!, defined .............................4
J
jack ................................................... 19
JIC .................................................... 64
Joint Industry Conference ................64
J514 ................................................. 64
K
kPa ................................................... 64
L
leaks .......................................... 6, 43
left-hand, defined ............................... 4
length change ...................................28
lift restrictions ...................................30
lifting ................................................. 36
lighting connector ............................. 19
lights ................................................... 7
linings, brake ........................... 49
lowering ............................................ 28
lubrication ......................................... 45
Lubriplate ................................ 51
lug nut .............................................. 55
lug nuts .............................................55
, 51
, 53
M
Maintenance .....................................44
maintenance safety ............................ 8
manual brake ....................................33
master cylinder ........................ 46
medical assistance ........... 6
model number ....................................4
MSDS ............................................... 49
MSHA ............................................... 49
, 47
, 20, 23
N
National Pipe Thread ....................... 64
NIOSH .............................................. 49
Note, defined ...................................... 4
NPT .................................................. 64
O
orange reflectors ..............................11
ORB ................................................. 64
orientation rose .................................. 4
O-Ring Boss ..................................... 64
O-ring, filter ...................................... 48
OSHA ............................................... 49
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72 8315-8324DVN Great Plains Manufacturing, Inc.
P
parking ............................................. 41
parking brake ................................... 55
parts ................................................. 43
pattern, bolt ...................................... 55
petcock .................................... 21
phone number, GP ........................... 17
pin, hitch .......................................... 35
PPI-203VR, block ............................. 18
PPI-205H, cushion ........................... 18
PPI-302V, plate ................................ 18
Pre-leveling of machine ................... 37
protective equipment .......................... 6
provision line, brakes ....................... 22
psi .................................................... 64
, 48
Q
QD ................................................... 22
R
raising .............................................. 28
red .................................................... 34
red reflectors .................................... 11
red, air line ....................................... 22
reel ................................................... 41
reflector
amber ......................................... 12
orange ........................................ 11
panel .......................................... 11
red .............................................. 11
SMV ........................................... 10
triangle ....................................... 10
reflectors, safety ............................... 10
repair parts ......................................... 4
reservoir 21
reverse ............................................. 36
riders .................................................. 6
right-hand, defined ............................. 4
rose, orientation ................................. 4
run-out ............................................. 54
, 22, 34, 46, 47, 48
S
SAE J1703 ....................................... 47
SAE J1704 ....................................... 47
SAE J1705 ....................................... 47
SAE J514 ......................................... 64
safety chain ............................... 6
safety decal ...................................... 10
safety information ............................... 5
folding ........................................ 24
general ......................................... 5
lower/raise .................................. 28
transport ..................................... 31
unfolding .................................... 24
safety symbol ..................................... 5
scale ................................................ 35
screen, filter ..................................... 48
self-adjuster ..................................... 51
self-adjuster, brake ........................... 55
service brake ................................... 33
, 19
service brakes ..................................33
setup .................................................16
shoe replacement .............................50
shoe surface .....................................54
shutdown ............................................7
single-line .........................................22
Slow Moving Vehicle .........................10
SMV (Slow Moving Vehicle) .............10
solvents ............................................49
Specifications and Capacities ..........62
speed limit
forward ........................................35
transport ......................................35
speed, transport ...............................31
spike drag .........................................40
spindle ..............................................50
split brakes .......................................21
spring washers .................................53
steering braking ................................21
storage ................................................7
storing machine ................................43
supply line, brakes ............................22
support .............................................44
symbol, safety .....................................5
T
tables
brakes, yours ..............................33
document family .....................3
fittings torque ..............................64
hose color code ..........................20
tire inflation .................................64
torque values ..............................63
test brakes ........................................55
tilling, ending ....................................37
tilt ......................................................24
tire inflation .......................................64
tires .....................................................7
Titan .................................................64
torque, lug nut ...................................55
towing ...................................... 31
towing vehicle capability ..........31
trailer brake .......................................33
trailing implement .............................36
transport ...........................................35
transport locks ......................... 26
transport speed ......................... 7
transporting ......................................23
troubleshooting
coulter/disc gang .........................57
general ........................................56
sweep/shank ...............................58
transport ......................................58
turns .................................................36
, 4
, 35
, 35
, 44
, 31
U
unfolding ...........................................24
unhitch ..............................................41
URLs, tires ........................................64
V
V-block ..............................................18
W
WARNING, defined ............................ 5
warranty ......................... 36
weight ............................................... 35
weight, implement ............................ 35
welding ............................................... 8
Wheel Bearing Hub .......................... 45
Wing Depth Adjustment ................... 38
wing lock pin .....................................26
wing lock valve
closed ................................ 25
open & closed .............................26
WNRE-05-155-4 ...............................49
, 65, 69
, 26
Y
yellow ............................................... 34
Numerics
20 mph ............................................. 35
30 kph ....................................... 7
36 hours ........................................... 41
550-466P, manual .............................. 4
550-466Q-ENG, manual .................... 4
550-466Q, manual ............................. 4
562-466M, manual ............................. 4
802-383C, bolt ..................................18
802-487C, bolt ..................................18
803-367C, nut .................................. 18
818-055C, reflector .......................... 10
818-188C, decal ............................... 12
818-398C, decal ............................... 15
818-613C, decal ............................... 15
838-094C, decal ............................... 14
838-398c,reflector ............................ 11
838-598C, decal ............................... 15
838-599C, decal ............................... 13
838-600C, decal ............................... 13
838-602C, decal ............................... 14
838-603C, reflector .......................... 11
838-611C, decal ............................... 14
838-614C, reflector .......................... 11
838-615C, decal ............................... 12
838-890C, decal ............................... 13
848-271C, decal ............................... 15
848-398C, decal ............................... 12
848-507C, decal ............................... 15
848-512C, decal ............................... 15
848-513C, decal ............................... 13
848-516C, decal ............................... 13
848-517C, decal ............................... 14
848-530C, decal ............................... 14
848-531C, decal ............................... 14
848-757C, decal ............................... 13
848-781C, decal ............................... 15
890-798C, clevis ............................... 18
, 31
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Great Plains Manufacturing, Inc.
Corporate Office: P.O. Box 5060
Salina, Kansas 67402-5060 USA
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