GREAT PLAINS 3S-4010HDF User manual

Manufacturing, Inc.
www.greatplainsmfg.com
© Copyright 2018 Printed 07/19/2018 196-522M
EN
Table of Contents Index
Table of Contents Index
ORIGINAL INSTRUCTIONS
Operator Manual
3S-4010HD and 3S-4010HDF
3-Section 40-Foot Heavy Duty Drill
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.
!
29121

Machine Identification
Record your machine details in the log below. If you replace this manual, be sure to transfer this information to the new
manual.
If you or the dealer have added options not originally ordered with the machine, or removed options that were originally
ordered, the weights and measurements are no longer accurate for your machine. Update the record by adding the
machine weight and measurements with the option(s) weight and measurements.
Dealer Contact Information
Model Number
Serial Number
Machine Height
Machine Length
Machine Width
Machine Weight
Year of Construction
Delivery Date
First Operation
Accessories
Name:
Street:
City/State:
Telephone:
Email:
Dealer’s Customer
No.:
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

3S4010HD Cover Index Table of Contents
Great Plains | 196-522M | 07/19/2018 Cover Index iii
© Copyright 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2018. All rights Reserved
Great Plains Manufacturing, Inc. provides this publication “as is” without warranty of any kind, either expressed or implied. While every precaution has been
taken in the preparation of this manual, Great Plains Manufacturing, Inc. assumes no responsibility for errors or omissions. Neither is any liability assumed for
damages resulting from the use of the information contained herein. Great Plains Manufacturing, Inc. reserves the right to revise and improve its products as
it sees fit. This publication describes the state of this product at the time of its publication, and may not reflect the product in the future.
Trademarks of Great Plains Manufacturing, Inc. include: AccuShot, Max-Chisel, Row-Pro,
Singulator Plus, Short Disk, Swath Command, Terra-Tine, Ultra-Chisel, and X-Press.
Registered Trademarks of Great Plains Manufacturing, Inc. include: Air-Pro, Clear-Shot, Discovator, Great Plains, Land Pride, MeterCone,
Nutri-Pro, Seed-Lok, Solid Stand, Terra-Guard, Turbo-Chisel, Turbo-Chopper, Turbo-Max, Turbo-Till, Ultra-Till, Whirlfilter, and Yield-Pro.
Brand and Product Names that appear and are owned by others are trademarks of their respective owners.
Printed in the United States of America
Table of Contents
Important Safety Information.................................................1
Introduction...........................................................................11
Document Family.............................................................11
Description of Unit ...........................................................11
Using This Manual...........................................................11
Definitions.................................................................11
Owner Assistance............................................................12
Preparation and Setup .........................................................13
Initial Setup......................................................................13
Pre-Setup Checklist.........................................................13
Hitching to Tractor ...........................................................13
Tractor Electrical Connections.........................................14
Tractor Hydraulic Hose Hookup ......................................16
Hydraulic Charge.............................................................17
Drill Level.........................................................................17
Marker Setup ...................................................................17
Operating Instructions .........................................................19
General Description.........................................................19
Pre-Start Checklist...........................................................20
Raising and Lowering (Lift)..............................................20
Folding.............................................................................21
Unfolding .........................................................................22
Lock-Out Hubs.................................................................23
Transport .........................................................................23
Loading Materials ............................................................25
Marker Operation.............................................................30
Acremeter Operation .......................................................31
Clutch/Point Row Operation ............................................32
Shaft Monitor Operation (Option) ....................................33
Field Operations ..............................................................34
Parking ............................................................................35
Storage ............................................................................35
Adjustments ..........................................................................36
Planting Depth .................................................................36
Opener Frame Height......................................................37
Frame-Mounted Coulters.................................................37
Frame Height without Frame-Mounted Coulters .............40
Frame Weights ................................................................43
Material Rate Setting .......................................................43
10HD Series Row Unit Adjustments................................44
Marker Adjustments.........................................................54
Troubleshooting ...................................................................55
General Troubleshooting .................................................55
Clutch Troubleshooting....................................................58
Maintenance and Lubrication ..............................................59
Materials Clean-Out.........................................................60
Seed Flap Replacement (s/n B1010B-)...........................61
Seed Flap Replacement (s/n B1011B+)..........................61
Chain Maintenance .........................................................62
Bleeding Hydraulics.........................................................63
Adjusting Fold Cylinders..................................................64
Leveling Drill....................................................................65
Tongue Spacer Block ......................................................69
Height Switch ..................................................................70
Detent and Pressure Plate Adjust ...................................70
Marker Maintenance........................................................71
Lubrication.......................................................................74
Options ..................................................................................82
Shaft Monitor ...................................................................82
Hitches ............................................................................82
Acremeter........................................................................82
Flat Fold Markers ............................................................83
Dual Weight Kit................................................................83
Coulters ...........................................................................84
Seed Box Options ...........................................................84
Small Seeds Attachment .................................................85
Row Unit Options ............................................................86
Press Wheels ..................................................................87
Appendix A - Reference Information ..................................88
Specifications and Capacities .........................................88
Tire Inflation Chart...........................................................88
Torque Values Chart .......................................................89
Hydraulic Diagrams .........................................................89
Chain Routing..................................................................92
Appendix B - Initial Setup..................................................102
Pre-Delivery Setup ........................................................102
Initial Setup....................................................................104

Cover Index
Cover Index

3S4010HD Table of Contents Index Important Safety Information
Great Plains | 196-522M | 07/19/2018 Table of Contents Index 1
Important Safety Information
Look for Safety Symbol
The SAFETY ALERT SYMBOL indicates there is a
potential hazard to personal safety involved and extra
safety precaution must be taken. When you see this
symbol, be alert and carefully read the message that
follows it. In addition to design and configuration of
equipment, hazard control and accident prevention are
dependent upon the awareness, concern, prudence and
proper training of personnel involved in the operation,
transport, maintenance and storage of equipment.
Be Aware of Signal Words
Signal words designate a degree or level of hazard
seriousness.
DANGER indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
This signal word is limited to the most extreme situations,
typically for machine components that, for functional
purposes, cannot be guarded.
WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury, and includes hazards that are exposed when
guards are removed. It may also be used to alert against
unsafe practices.
CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury. It may also be used to alert against unsafe
practices.
Prepare for Emergencies
? Be prepared if a fire starts
? Keep a first aid kit and fire extinguisher handy.
? Keep emergency numbers for doctor, ambulance, hospital
and fire department near phone.
Be Familiar with Safety Decals
? Read and understand “Safety Reflectors and Decals” on
page 6, thoroughly.
? Read all instructions noted on the decals.
? Keep decals clean. Replace damaged, faded and illegible
decals.
000
112
911
999

Great Plains | 196-522M | 07/19/2018 Table of Contents Index 2
3S4010HD Table of Contents Index Important Safety Information
Avoid High Pressure Fluids
Escaping fluid under pressure can penetrate the skin,
causing serious injury.
? Avoid the hazard by relieving pressure before disconnecting
hydraulic lines.
? Use a piece of paper or cardboard, NOT BODY PARTS, to
check for suspected leaks.
? Wear protective gloves and safety glasses or goggles when
working with hydraulic systems.
? If an accident occurs, seek immediate medical attention
from a physician familiar with this type of injury.
Use A Safety Chain
? Use a safety chain to help control drawn machinery should
it separate from tractor drawbar.
? Use a chain with a strength rating equal to or greater than
the gross weight of towed machinery.
? Attach chain to tractor drawbar support or other specified
anchor location. Allow only enough slack in chain to permit
turning.
? Replace chain if any links or end fittings are broken,
stretched or damaged.
? Do not use safety chain for towing.
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 when folding/
unfolding, raising/lowering markers, raising/lowering
openers, and transporting.
Check for Overhead Lines
Drill markers contacting overhead electrical lines can
introduce lethal voltage levels on drill and tractor frames.
A person touching almost any metal part can complete
the circuit to ground, resulting in serious injury or death.
At higher voltages, electrocution can occur without direct
contact.
? Avoid overhead lines during seed loading/unloading and
marker operations.

3S4010HD Table of Contents Index Important Safety Information
Great Plains | 196-522M | 07/19/2018 Table of Contents Index 3
Use Safety Lights and Devices
Slow-moving tractors and towed drills can create a
hazard when driven on public roads. They are difficult to
see, especially at night.
? Use flashing warning lights and turn signals whenever
driving on public roads.
? Use lights and devices provided with the drill.
Transport Machinery Safely
Maximum transport speed for drill is 20 mph (32 kph).
Rough terrains may require a slower speed. Sudden
braking can cause a towed load to swerve and upset.
? Do not exceed 20 mph (32 kph). Never travel at a speed
which does not allow adequate control of steering and stop-
ping. Reduce speed if towed load is not equipped with
brakes.
? Comply with national, regional and local laws.
? Follow your tractor manual recommendations for maximum
hitch loads. Insufficient weight on tractor steering wheels
will result in loss of control.
? Carry reflectors or flags to mark drill in case of breakdown
on the road.
? Keep clear of overhead power lines and other obstructions
when transporting. Refer to transport dimensions under
“Specifications and Capacities” on page 88.
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 pro-
tection such as earmuffs or earplugs.
? Because operating equipment safely requires your full
attention, avoid wearing entertainment headphones while
operating machinery.

Great Plains | 196-522M | 07/19/2018 Table of Contents Index 4
3S4010HD Table of Contents Index Important Safety Information
Handle Chemicals Properly
Agricultural chemicals can be dangerous. Improper use
can seriously injure persons, animals, plants, soil and
property.
? Do not use liquid treatments with drill.
? Read and follow chemical manufacturer’s instructions.
? Wear protective clothing.
? Handle all chemicals with care.
? Avoid inhaling smoke from any type of chemical fire.
? Never drain, rinse or wash dispensers within 100 feet (30m)
of a freshwater source, nor at a car wash.
? Store or dispose of unused chemicals as specified by chemi-
cal manufacturer.
? Dispose of empty chemical containers properly. Laws gen-
erally require power rinsing or rinsing three times, followed
by perforation of the container to prevent re-use.
Shutdown and Storage
? Clean out and safely store or dispose of residual chemicals.
? Secure drill using blocks and transport locks.
Lock up openers.
? Store in an area where children normally do not play.
Practice Safe Maintenance
? Understand procedure before doing work. Use proper tools
and equipment. Refer to this manual for additional informa-
tion.
? Work in a clean, dry area.
? Put tractor in park, turn off engine, and remove key before
performing maintenance.
? Make sure all moving parts have stopped and all system
pressure is relieved.
? Disconnect battery ground cable (-) before servicing or
adjusting electrical systems or before welding on drill.
? 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 drill before opera-
tion.

3S4010HD Table of Contents Index Important Safety Information
Great Plains | 196-522M | 07/19/2018 Table of Contents Index 5
Tire Safety
Tire changing can be dangerous and should be
performed by trained personnel using correct tools and
equipment.
? When inflating tires, use a clip-on chuck and extension hose
long enough for you to stand to one side–not in front of or
over tire assembly. Use a safety cage if available.
? When removing and installing wheels, use wheel-handling
equipment adequate for weight involved.
Safety At All Times
Thoroughly read and understand the instructions in this
manual before operation. Read all instructions noted on
the safety decals.
? Be familiar with all drill functions.
? Operate machinery from the driver’s seat only.
? Do not leave drill unattended with tractor engine running.
? Do not dismount a moving tractor. Dismounting a moving
tractor could cause serious injury or death.
? Do not stand between the tractor and drill 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
drill. Make sure all persons are clear of working area.
? Do not turn tractor too tightly, causing drill to ride up on
wheels. This could cause personal injury or equipment
damage.

Great Plains | 196-522M | 07/19/2018 Table of Contents Index 6
3S4010HD Table of Contents Index Important Safety Information
Safety Reflectors and Decals
Your drill comes equipped with all lights, safety reflectors
and decals in place. They were designed to help you
safely operate your drill.
? Read and follow decal directions.
? Keep lights in operating condition.
? Keep all safety decals clean and legible.
? Replace all damaged or missing decals. Order new decals
from your Great Plains dealer. Refer to this section for
proper decal placement.
? When ordering new parts or components, also request cor-
responding safety decals.
To install new decals:
1. Clean the area on which the decal is to be placed.
3. Peel backing from decal. Press firmly on surface,
being careful not to cause air bubbles under decal.
Red Reflectors
838-266C
rear face of rear casters;
2 total
Amber Reflectors
838-265C
outside face of rear casters,
rear face, inside ends, wing walkboards,
rear face, outside ends, wing walkboards,
outside face of wing walkboards;
8 total
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3S4010HD Table of Contents Index Important Safety Information
Great Plains | 196-522M | 07/19/2018 Table of Contents Index 7
Daytime Reflectors
838-267C
rear face, rear casters, below red reflectors;
2 total
Danger: Read Manual
848-512C
On tongue at hitch;
1 total
Danger: Pinch/Crush Hazard
818-590C
On outside of left tongue near hitch;
1 total
29122
29122
848-512C
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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Great Plains | 196-522M | 07/19/2018 Table of Contents Index 8
3S4010HD Table of Contents Index Important Safety Information
Warning: Pinch/Crush Hazard
818-045C
inside and outside faces, all caster pivots;
8 total
Warning: Excessive Speed Hazard
818-188C
On outside of left tongue near hitch;
1 total
Warning: High Pressure Fluid
818-339C
On outside of left tongue near hitch;
1 total
29122
29122
818-188C Rev. C
Do Not exceed 20 mph maximum transport
speed. Loss of vehicle control and/or machine
can result.
To Prevent SeriousInjury or Death:
EXCESSIVE SPEED HAZARD
WARNING
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3S4010HD Table of Contents Index Important Safety Information
Great Plains | 196-522M | 07/19/2018 Table of Contents Index 9
Warning Marker Pinch Point (Option)
818-579C
on either side of inner marker arm,
two each marker installed;
2 or 4 total
Warning Overhead Marker (Option)
818-580C
on either side of inner marker arm,
two each marker installed;
2 or 4 total
Warning: Falling Hazard
838-102C
Top forward at each walkboard ladder;
2 total
Caution: Tires Not A Step
818-398C
Top face, each side of rockshaft;
2 total
20287
27010
WARNING
To avoid serious injury or death:
Watch your step when climbing ladder or
walking on walkboard.
838-102C
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Great Plains | 196-522M | 07/19/2018 Table of Contents Index 10
3S4010HD Table of Contents Index Important Safety Information
Caution: General
818-587C
On outside of left tongue near hitch;
1 total
Caution: 85 PSI Tire Pressure
848-147C
On rim of each wheel;
6 total
29122
WARNING:
Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Read Owner’s Manual before usingmachine.
Stand clear when foldingand unfoldingmarkers.
Stand clear when raisingand loweringmachine.
Keep all safety shieldsand devicesin place.
Keep hands, feet, and clothingaway from
Never ride on machine.
Alwayslower or properly support machine
Escapinghydraulic fluid can cause serious
Review safety instructionswith all operators
movingchainsand sprockets.
BEFORE servicing.
818-587C Rev. B
injury.
annually.
CAUTION
29122

3S4010HD Table of Contents Index Introduction
Great Plains | 196-522M | 07/19/2018 Table of Contents Index 11
Introduction
Great Plains welcomes you to its growing family of new
product owners. Your 3-Section 40-Foot Heavy Duty Drill
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.
Document Family
196-522M Operator Manual (this document)
196-522P 3S-4010HD/HDF Parts Manual
196-522B Seed Rate Manual
Description of Unit
The 3S-4010HD/HDF is a pull-type 3-section fluted feed
folding drill with a working width of 40 feet (12.2m) and
10HD Series Heavy Duty parallel-arm double disk
openers. Opener disks make a seed bed, and seed
tubes between the disks place seed in the furrow. Press
wheels following the disks close the furrow and gauge
opener seeding depth. Opener bodies are independently
adjustable for seeding depth and row unit down-force.
Intended Usage
Use this drill to seed production-agriculture crops in no
till or minimum tillage applications. Do not modify the drill
for use with attachments, accessories or uses other than
those specified by Great Plains.
Models Covered
Seed-only models:
3S4010HD-481048 row 10in (25cm)
3S4010HD-647564 row 7.5in (19cm)
Fertilizer models:
3S4010HDF-481048 row 10in (25cm)
3S4010HDF-647564 row 7.5in (19cm)
Using This Manual
This manual familiarizes you with safety, assembly,
operation, adjustments, troubleshooting, and
maintenance. Read this manual and follow the
recommendations to help ensure safe and efficient
operation.
The information in this manual is current at printing.
Some parts may change to assure top performance.
Definitions
The following terms are used throughout this manual.
Right-hand and left-hand as used in this manual are
determined by facing the direction the machine will travel
while in use unless otherwise stated.
Paragraphs in this format present a crucial point of information
related to the current topic. Read and follow the directions to:
- remain safe,
- avoid serious damage to equipment and
- ensure desired field results.
Paragraphs in this format provide useful information
related to the current topic.
Figure 1
3S-4010HD with Optional Markers
29072
.tif
600 dpi
Figure 2
Left/Right Notation
29121
L
R

Great Plains | 196-522M | 07/19/2018 Table of Contents Index 12
3S4010HD Table of Contents Index Introduction
Owner Assistance
If you need customer service or repair parts, contact a
Great Plains dealer. They have trained personnel, repair
parts and equipment specially designed for Great Plains
products.
Refer to Figure 3
Your drill’s parts were specially designed and should only
be replaced with Great Plains parts. Always use the
serial and model number when ordering parts from your
Great Plains dealer. The serial-number plate is located
on the front face, left end, of the center section opener
tool bar.
Record your drill model and serial number here for quick
reference:
Model Number:__________________________
Serial Number: __________________________
Your Great Plains dealer wants you to be satisfied with
your new drill. 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 write to:
Product Support
Great Plains Mfg. Inc., Service Department
PO Box 5060
Salina, KS 67402-5060
785-823-3276
Figure 3
Serial Number Plate
27179

3S4010HD Table of Contents Index Preparation and Setup
Great Plains | 196-522M | 07/19/2018 Table of Contents Index 13
Preparation and Setup
This section helps you prepare your tractor and drill for
use. Before using the drill in the field, you must hitch the
drill to a suitable tractor and also setup the drill.
Initial Setup
Prior to first use, see “Install Clutch Switch Module in
Cab” on page 104. See that manual section for other
Options that may not have been factory- or dealer-
installed.
Pre-Setup Checklist
1. Read and understand “Important Safety
Information” on page 1.
2. Check that all working parts are moving freely, bolts
are tight, and cotter pins are spread.
3. Check that all grease fittings are in place and
lubricated. See “Lubrication” on page 74.
4. Check that all safety decals and reflectors are
correctly located and legible. Replace if damaged.
See “Safety Reflectors and Decals” on page 6.
5. Inflate tires to pressure recommended and tighten
wheel bolts as specified. “Appendix A - Reference
Information” on page 88.
Hitching to Tractor
Crushing Hazard:
You may be severely injured or killed by being crushed
between the tractor and drill. Do not stand or place any part of
your body between machines being hitched. Stop tractor
engine and set park brake before installing hitch pin.
Choose a drill-hitch option (page 82) that is compatible
with your tractor drawbar.
The 3S-4010HD/HDF has four hitch options:
• a clevis hitch,
• a small-hole, single-strap hitch,
• a large-hole, single-strap hitch, or;
• a large cast strap hitch.
Always use a locking-style hitch pin sized to match the
holes in the hitch and drawbar, and at least 112in (3.8cm)
in diameter.
Figure 4
Hitch Options
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Great Plains | 196-522M | 07/19/2018 Table of Contents Index 14
3S4010HD Table of Contents Index Preparation and Setup
Refer to Figure 5
1. Adjust the drill hitch to match your tractor-drawbar
height, using crank of tongue jack on side of tongue.
& The precise height is not critical, as the drill leveling is
set at the mainframe and is independent of tongue
level.
& The hitch may be mounted inverted if necessary, but
always have two (2) bolts in two holes of both tongue
and hitch.
2. Securely attach safety chain to an anchor on a
tractor capable of pulling the drill.
Refer to Figure 6
3. Use crank to raise jack foot. Remove pin and jack.
4. Store jack on top of tongue.
Tractor Electrical Connections
Lighting Harness
Refer to Figure 7
Plug drill electrical lead into tractor seven-pin connector.
If your tractor is not equipped with a seven-pin connector,
contact your dealer for installation.
Figure 5
Drill Hitched
20273
100% Figure 6
Jack in Storage Location
20272
Figure 7
Lighting Connector
26467

3S4010HD Table of Contents Index Preparation and Setup
Great Plains | 196-522M | 07/19/2018 Table of Contents Index 15
Electric Clutch Harness
Refer to Figure 8
Mate the connector for the cab clutch control.
Shaft Monitor Harness (Option)
Refer to Figure 9
If the drill is equipped with the optional shaft monitor,
mate the connector for the cab display.
See “Shaft Monitor” on page 82 for ordering
information.
Figure 8
Section Clutch Connector
26469
Figure 9
Shaft Monitor Connector
26468

Great Plains | 196-522M | 07/19/2018 Table of Contents Index 16
3S4010HD Table of Contents Index Preparation and Setup
Tractor Hydraulic Hose Hookup
High Pressure Fluid Hazard:
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 attention from a physician familiar
with this type of injury.
Refer to Figure 10
Current Style Color Coded Hose Handles
Great Plains hydraulic hoses have color coded handle
grips to help you hookup hoses to your tractor outlets.
Hoses that go to the same remote valve are marked with
the same color.
& Markers are normally on Fold circuit.
To distinguish hoses on the same hydraulic circuit, refer
to the symbol molded into the handle grip. Hoses with an
extended-cylinder symbol feed cylinder base ends.
Hoses with a retracted-cylinder symbol feed cylinder rod
ends.
Older Style Hoses with Color Ties
Refer to Figure 11
Hoses that go to the same remote valve are marked with
the same color tie.
To distinguish hoses on the same hydraulic circuit, refer
to plastic hose label. The hose under an extended-
cylinder symbol feeds a cylinder base end. The hose
under a retracted-cylinder symbol feeds a cylinder rod
end.
1. Connect transport-lift hoses to tractor remote valve.
2. Connect fold hoses to tractor remote valve.
3. Connect lock hoses to tractor remote valve.
4. Connect marker hoses to tractor remote valve.
Color Hydraulic Function
Blue Lift Cylinders
Gray Fold Cylinders
Green Lock Cylinders
*note Markers (Optional)
Figure 10
Color Coded Hose Grips
31733
Figure 11
Older Style Hose with Label
817-348c
17641
Color Hydraulic Function
Blue Lift Cylinders
White Fold Cylinders
Orange Lock Cylinders
Yellow Markers (Optional)