GREAT PLAINS Yield-Pro Air-Pro YP625PD Operator's Manual

Table of Contents Index

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31794

18-Row 110 cm Yield-Pro® Air Planters

with Air-Pro

Operator Manual

YP625PD

®

Seed Meters

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,
or may show similar 3-point models and their options.

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EN

© Copyright 2019 Printed 06/12/2019 401-754M

Table of Contents Index

Table of Contents Index

Table of Contents Index

Great Plains Manufacturing, Inc. Table of Contents Index iii

Table of Contents

Important Safety Information ...................................... 1

Safety Decals ................................................................. 6

Introduction ................................................................11

Models Covered ...........................................................11

Description of Unit ........................................................ 11

Intended Usage ........................................................11

Document Family .....................................................11

Using This Manual........................................................ 11

Definitions.................................................................11

Owner Assistance ........................................................12

Preparation and Setup ............................................... 13

Initial Setup................................................................... 13

Post-Delivery/Seasonal Setup......................................13

Pre-Planting Setup .......................................................13

Hitching Tractor to Planter............................................14

Electrical Hookup .....................................................14

Hydraulic Hose Hookup............................................ 15

Leveling Planter............................................................ 16

Wheel Adjustment for Leveling................................. 16

Monitor Setup ...............................................................17

Marker Setup (Option)..................................................17

Operating Instructions...............................................18

Pre-Start Checklist .......................................................18

Raising/Lowering Planter ............................................. 19

Re-Phasing Lift System ............................................ 19

Lift Cylinder Locks ....................................................19

Transport ...................................................................... 20

Typical YP625PD Planter Weights ...........................20

Transport Steps ........................................................ 21

Loading Materials .........................................................22

Hopper Operations ................................................... 22

Loading Seed ........................................................... 22

Loading Dry Fertilizer ...............................................24

Suitable Materials ................................................. 24

System Inspection ................................................ 24

Hopper Lid Operation ........................................... 24

Dry Fertilizer Operation ................................................25

Monitor Operation......................................................... 26

Air System Operation ...................................................27

Air and Seeding System Overview ...........................28

Fan Circuit Operation ........................................... 29

Fan General Operating Information...................... 30

Butterfly Valve Operation:.....................................30

Air-Pro

®

Meter Operation ............................................. 31

Meter Operation .......................................................31

Marker Operation (Option) ........................................... 32

Before Operating Markers ........................................ 32

Marker Unfold (one side) .......................................... 32

Both Sides Unfolded.............................................32

Row Marker Operation .............................................32

Folding The Markers ................................................32

Field Set-Up Checklists ................................................ 32

Field Operation............................................................. 34

Short-Term Parking ......................................................35

Long-Term Storage...................................................... 35

Adjustments ............................................................... 36

Setting Material Rates.................................................. 37

Planting Rate Details ............................................... 37

1. Rate: Monitor configuration: ............................. 37

2. Rate: Disk Selection:........................................ 37

3. Rate: Range Sprockets .................................... 38

4. Rate: Transmission Sprockets ......................... 38

5. Rate: Seed Inlet Shutter................................... 39

6. Rate: Meter Pressurization............................... 39

7. Rate: Checking................................................. 39

Fan and Adjustment..................................................... 40

Furrow Check:...................................................... 40

Fine-Tuning Meter Pressurization ............................ 41

Alternate Skip/Double Check ............................... 41

Dry Fertilizer Adjustment.............................................. 42

Dry Fertilizer Rate .................................................... 42

Frame-Mounted Accessory Adjustments ..................... 42

Coulter Adjustments (Option)................................... 42

Coulter Depth ....................................................... 43

Coulter Blade Angle ............................................. 43

Coulter to Row Alignment .................................... 43

Coulter Blade Style .............................................. 43

Fertilizer Applicator Adjustments (Option)................ 44

Applicator Release Height.................................... 44

Applicator Release Angle..................................... 44

Dual Terra-Tine™ Adjustment (Option) ................... 45

Terra-Tine™ Down Force .................................... 45

Terra-Tine™ Height ............................................. 45

Terra-Tine™ Row Alignment................................ 45

Marker Adjustments (Option) ....................................... 46

Marker Disk Adjustment........................................... 46

Gauge Wheel Height Adjustment................................. 46

25AP Series Row Unit Adjustments............................. 47

Row Unit Down Pressure ......................................... 48

Adjusting Down-Force.......................................... 48

Row-Unit Opener Disk Adjustments......................... 50

Setting Planting Depth ......................................... 50

Opener Disc Contact Region ............................... 50

Adjusting Disc Contact ......................................... 50

Side Gauge Wheel Adjustment ................................ 51

Adjusting Gauge Wheel Scrapers (Option) .......... 52

Seed Meter Setup and Adjustment .......................... 53

Meter Rain Cover ................................................. 53

Seed Inlet Shutter Adjustment ............................. 53

Optimal Seed Pool Slopes ................................... 54

Meter Re-Fill......................................................... 54

Air-Pro

®

Meter Disk Installation ............................... 55

Removing a Seed Disk......................................... 56

Row Unit Shut-Off .................................................... 56

Sprocket Indexing (Stagger) ................................ 58

Seed Firmer Adjustments ........................................ 59

Keeton
Seed-Lok

®

Seed Firmer Adjustment ........................ 59

®

Seed Firmer Lock-Up ........................ 59

Press Wheel Adjustment.......................................... 60

Press Wheel Down Pressure ............................... 60

Press Wheel Stagger ........................................... 60

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iv YP625PD Table of Contents Index Great Plains Manufacturing, Inc.

Press Wheel Centering ........................................ 61

Troubleshooting......................................................... 62

Planting Rate Problems ............................................... 62

Suggested Furrow Check:.................................... 62

Seed Pool Troubleshooting.......................................... 63

Magnehelic

®

Gauge Troubleshooting ...................... 64

Population Troubleshooting Charts.............................. 65

Maintenance and Lubrication ................................... 72

Maintenance ................................................................ 72

Material Clean-Out....................................................... 72

Seed Clean-Out ....................................................... 72

Funnel Conversion ............................................... 73

Seed Clean-Out (Container) ................................ 73

Seed Clean-Out (Funnel) ..................................... 73

Meter Clean-Out ...................................................... 74

Alternate Meter Clean-Out ................................... 74

Dry Fertilizer Clean-Out ........................................... 75

Meter Brush Maintenance............................................ 76

Meter Brush Replacement ....................................... 77

Seed Disk Maintenance ........................................... 78

Cleaning and Storing Seed Disks ........................ 78

Speed Sensor Gap ...................................................... 78

Hydraulic Maintenance ................................................ 79

Re-Phasing Lift System ........................................... 80

Lift Cylinder Bleeding ............................................... 80

Drive-Line Shear Pin.................................................... 81

Marker Maintenance (Option) ...................................... 81

Marker Shear Bolt Replacement.............................. 81

Marker Grease Seal Cap ......................................... 81

Chain Maintenance ...................................................... 82

Meter Drive Chain .................................................... 82

Spreaders and Scrapers...............................................83

Row-Unit Side Wheels..................................................83

Seed Flap Replacement ...............................................84

Lubrication ....................................................................85

Seed Lubricants............................................................90

Options ........................................................................91

Lock-Up Pins ............................................................92

Appendix A - Reference Information ........................96

Specifications and Capacities.......................................96

Tire Inflation Chart ........................................................96

Dimensions...............................................................97

Torque Values Chart ....................................................98

Hydraulic Diagrams ......................................................99

Chain Routing.............................................................102

Appendix B - Initial Setup ........................................107

Post-Delivery Checklist...............................................107

Seed Monitor Console Installation..............................107

Seed Monitor Console Quick-Start .............................108

Power-Up The Console ..........................................108

Set Metric Mode .....................................................108

Set Planter Row Count ...........................................109

Set Planter Row Spacing........................................109

Initial Marker Setup (Option).......................................110

Marker Speed Adjustment ......................................110

Marker Extension....................................................110

122-278S Scraper Installation ....................................111

Appendix C - Flat Ground Planting.........................113

Warranty .....................................................................114

Index ..........................................................................115

401-754M Table of Contents Index 06/12/2019

YP625PD Table of Contents Index Important Safety Information 1

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120

Important Safety Information

Look for Safety Symbol

The SAFETY ALERT SYMBOL indicates there is a
potential hazard to personal safety involved and extra
safety precaution must be taken. When you see this
symbol, be alert and carefully read the message that
follows it. In addition to design and configuration of
equipment, hazard control and accident prevention are
dependent upon the awareness, concern, prudence and
proper training of personnel involved in the operation,
transport, maintenance and storage of equipment.

Be Aware of Signal Words

Signal words designate a degree or level of hazard
seriousness.

DANGER indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
This signal word is limited to the most extreme situations,
typically for machine components that, for functional
purposes, cannot be guarded.

WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury, and includes hazards that are exposed when
guards are removed. It may also be used to alert against
unsafe practices.

CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury. It may also be used to alert against unsafe
practices.

Prepare for Emergencies

 Be prepared if a fire starts.

 Keep a first aid kit and fire extinguisher handy.

 Keep emergency numbers for doctor, ambulance, hospital

and fire department near phone.

Be Familiar with Safety Decals

 Read and understand “Safety Decals” on page 6,

thoroughly.

 Read all instructions noted on the decals.

 Keep decals clean. Replace damaged, faded and illegible

decals.

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YP625PD Table of Contents Index Important Safety Information 2

Wear Protective Equipment

Great Plains advises all users of chemical pesticides or
herbicides to use the following personal safety
equipment.

 Waterproof, wide-brimmed hat

 Face shield, goggles or full face respirator.

 Goggles with side shields or a full face respirator is

required if handling or applying dusts, wettable powders,
or granules.

 Cartridge-type respirator approved for pesticide vapors

unless label specifies another type of respirator.

 Waterproof apron.

 Waterproof, unlined gloves. Neoprene gloves are

recommended.

 Cloth coveralls/outer clothing changed daily; waterproof

items if there is a chance of becoming wet with spray

 Waterproof boots or foot coverings

 Do not wear contaminated clothing. Wash protective

clothing and equipment with soap and water after each
use. Personal clothing must be laundered separately from
household articles.

 Clothing contaminated with certain pesticides may need

to be destroyed according to national or local regulations.
Read chemical label for specific instructions.

 Wear clothing and equipment appropriate for the job.

Avoid loose-fitting clothing.

 Prolonged exposure to loud noise can cause hearing

impairment or loss. Wear suitable hearing protection such
as earmuffs or earplugs.

 Avoid wearing entertainment headphones while operating

machinery. Operating equipment safely requires the full
attention of the operator.

Avoid High Pressure Fluids

Escaping fluid under pressure can penetrate the skin,
causing serious injury. This planter requires a
Power-Beyond port, which is always under pressure
when the tractor is running.

 Avoid the hazard by relieving pressure at other remotes,

and shutting down tractor before connecting,
disconnecting or inspecting hydraulic lines.

 Use a piece of paper or cardboard, NOT BODY PARTS, to

check for suspected leaks.

 Wear protective gloves and safety glasses or goggles when

working with hydraulic systems.

 If an accident occurs, seek immediate medical assistance

from a physician familiar with this type of injury.

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YP625PD Table of Contents Index Important Safety Information 3

Use A Safety Chain

 Use a safety chain to help control drawn machinery

should it separate from tractor draw-bar.

 Use a chain with a strength rating equal to or greater than

the gross weight of towed machinery.

 Attach 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.

Keep Riders Off Machinery

Riders obstruct the operator’s view. Riders could be
struck by foreign objects or thrown from the machine.

 Never allow children to operate equipment.

 Keep all bystanders away from machine during operation.

Use Safety Lights and Devices

Slow-moving tractors and towed implements can create
a hazard when driven on public roads. They are difficult
to see, especially at night.

 Use flashing warning lights and turn signals whenever

driving on public roads.

 Use lights and devices provided with implement.

Transport Machinery Safely

Maximum transport speed for implement is 32 kph,
22 kph in turns. Some rough terrains require a slower
speed. Sudden braking can cause a towed load to
swerve and upset.

 Do not exceed 32 kph. Never travel at a speed which does

not allow adequate control of steering and stopping.
Reduce speed if towed load is not equipped with brakes.

 Comply with state and local laws.

 Do not tow an implement that, when fully loaded, weighs

more than 1.5 times the weight of towing vehicle.

 Carry reflectors or flags to mark planter 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 96.

 Do not fold or unfold the planter while the tractor is

moving.

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YP625PD Table of Contents Index Important Safety Information 4

Handle Chemicals Properly

Agricultural chemicals can be dangerous. Improper use
can seriously injure persons, animals, plants, soil and
property.

 Read and follow chemical supplier instructions.

 Wear protective clothing.

 Handle all chemicals with care.

 Agricultural chemicals can be dangerous. Improper use

can seriously injure persons, animals, plants, soil and
property.

 Inhaling smoke from any type of chemical fire is a serious

health hazard.

 Store or dispose of unused chemicals as specified by the

chemical manufacturer.

 If chemical is swallowed, carefully follow the chemical

manufacturer’s recommendations and consult with a
doctor.

 If persons are exposed to a chemical in a way that could

affect their health, consult a doctor immediately with the
chemical label or container in hand. Any delay could
cause serious illness or death.

 Dispose of empty chemical containers properly. By law

rinsing of the used chemical container must be repeated
three times. Puncture the container to prevent future use.
An alternative is to jet-rinse or pressure rinse the
container.

 Wash hands and face before eating after working with

chemicals. Shower as soon as application is completed for
the day.

 Apply only with acceptable wind conditions. Wind speed

must be below 8 kph. Make sure wind drift of chemicals
will not affect any surrounding land, people or animals.

 Never wash out a hopper within 30 m of any freshwater source or in a car wash.

Shutdown and Storage

 Lower planter, put tractor in park, turn off engine, and

remove the key.

 Secure planter using blocks and supports provided.

 Detach and store planter in an area where children

normally do not play.

Tire Safety

Tire changing can be dangerous. Employ trained
personnel using correct tools and equipment.

 When inflating tires, use a clip-on chuck and extension

hose long enough for you to stand to one side–not in front
of or over tire assembly. Use a safety cage if available.

 When removing and installing wheels, use wheel-handling

equipment adequate for weight involved.

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YP625PD Table of Contents Index Important Safety Information 5

Practice Safe Maintenance

 Understand procedure before doing work. Use proper

tools and equipment. Refer to this manual for additional
information.

 Work in a clean, dry area.

 Lower the planter, 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.

 Allow planter to cool completely.

 Disconnect battery ground cable (-) before servicing or

adjusting electrical systems or before welding on
planter.

 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 planter before

operation.

Safety At All Times

Thoroughly read and understand the instructions in this
manual before operation. Read all instructions noted on
the safety decals.

 Be familiar with all planter functions.

 Operate machinery from the driver’s seat only.

 Do not leave planter unattended with tractor engine

running.

 Do not stand between the tractor and planter during

hitching.

 Keep hands, feet and clothing away from power-driven

parts.

 Wear snug-fitting clothing to avoid entanglement with

moving parts.

 Watch out for wires, trees, etc., when folding and raising

planter. Make sure all persons are clear of working area.

MetaData: End of <Safety Topics>

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YP625PD Table of Contents Index Important Safety Information 6

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.

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31822

Safety Decals

Safety Reflectors and Decals

Your implement comes equipped with all lights, safety
reflectors and decals in place. They were designed to
help you safely operate your implement.

 Read and follow decal directions.

 Keep lights in operating condition.

 Keep all safety decals clean and legible.

 Replace all damaged or missing decals. Order new decals

from your Great Plains dealer. Refer to this section for
proper decal placement.

 When ordering new parts or components, also request

corresponding safety decals.

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Slow Moving Vehicle Reflector

818-055C

On the tube supporting meter pressurization manifold;
1 total

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Red Reflectors

838-266C

All configurations:
on the rear face of the outside seed hoppers (rear row on
twin- or triple-row),

With Markers:
On the rear face of the inner arm, above daytime
reflectors;

2 or 4 total

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YP625PD Table of Contents Index Important Safety Information 7

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31822

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31822

Amber Reflectors

838-265C

On the front face of the front tool bar, each end,
on the outside face of the mainframe, front corner,
and on the outside face of the outside seed hopper
frames (rear units if twin- or triple-row);
6 total

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Daytime Reflectors
838-267C

On the back of two center seed hoppers
(rear seed hoppers on twin-row planters) and
on the back of the inner marker arm (Option),
below red reflector;
2 or 4 total

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YP625PD Table of Contents Index Important Safety Information 8

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31822

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31822

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31822

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31822

Warning: Speed

818-337C

On top of tongue near hitch;
1 total

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Warning: High Pressure Fluid

818-339C

On top of tongue near hitch;
1 total

Warning: Markers (Option)

818-682C

On front face of inner marker arm;
2 total

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Warning: Moving Parts Hazard

838-363C

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On left outside face of Fertilizer transmission;
1 total

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YP625PD Table of Contents Index Important Safety Information 9

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31822

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31822

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31822

Warning: Rotating Fan

848-508C

On fan intake cage;

1 total

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Warning: High Pressure Fluid Hazard

848-517C

On top of tongue near hitch;

1 total

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Warning: Possible Chemical Hazard

848-520C

On the top of each fertilizer hopper lid;
3 total

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Warning: Crushing Hazard

848-523C

On front face of the front tool bar, right of hitch;
1 total

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YP625PD Table of Contents Index Important Safety Information 10

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31822

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68676

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Caution: Read Operator’s Manual

818-587C

On top of tongue near hitch;

1 total

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Caution: Read Operator’s Manual

848-512C

On top of tongue near hitch;

1 total

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Caution: Tire Pressure and Bolt Torque

848-708C

On valve stem side of each wheel;
4 total

See also “Tire Inflation Chart” on page 96.

MetaData: End of “
MetaData: End of “

Safety Decals
Important Safety Information

”.

”.

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YP625PD Table of Contents Index Introduction 11

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Figure 1

YP625PD Planter

31794

L

R

U

D

F

B

L

R

U

D

F

B

L

R

Introduction

Great Plains welcomes you to its growing family of new
product owners. The 18-Row 110 cm Yield-Pro

Planter (YP625PD) 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.

®

Air

Models Covered

®

YP625PD18TP110

 YP625TD and YP925TD (3-Point) models have a

separate Operator manual (401-755M).

Yield-Pro
Fertilizer, 18-Row, Triple-Row, 110 cm
triple-row spacing

Model 625, Pull-Type, Dry

Description of Unit

The YP625PD Planter is a towed precision planting
implement for use in conventional till, minimum-till, or
light no-till conditions.

a

The YP625PD is optimized for planting on beds
high.

The YP625PD includes a dry fertilizer system, and
optional frame-mounted coulters and/or row cleaners.
Coulters make it suitable for light to moderate no-till
conditions only. The YP625PD includes 25AP Series

openers with Air-Pro
of seed disks.

®

meters supporting a wide choice

Intended Usage

Use the YP625PD Planter to seed production-agriculture
crops only. Do not modify the planter for use with
attachments other than Great Plains options and
accessories specified for use with the YP625PD.

Document Family

401-754M Owner’s Manual (this document)

401-754B Seed and Fertilizer Rate manual

401-754P Parts manual

113-870M Marker installation manual

207-016M Terra-Tine™ Operator/Parts manual

11001-1372

Bulletin A-27

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DICKEY-john
Operator’s Manual

Dwyer Magnehelic

®

PM300-332-400 Planter Monitor

®

instructions

18 cm

Using This Manual

This manual will familiarize you with
safety, assembly, operation,
adjustments, troubleshooting, and
maintenance. Read this manual and
follow the recommendations to help
ensure safe and efficient operation.

The information in this manual is
current at printing. Some parts may
change to assure top performance.

Definitions

The following terms are used
throughout this manual.

A crucial point of information related to the preceding topic.
Read and follow the directions to remain safe, avoid serious
damage to equipment and ensure desired field results.

 Useful information related to the preceding topic.

Right-hand and left-hand as used in
this manual are determined by facing
the direction the machine will travel
while in use unless otherwise stated.
An orientation rose in some line art
illustrations shows the directions of:
Up, Back, Left, Down, Front, Right.

“Option” indicates a feature or capability that is optional
on the original planter purchase, and may not be

a. For planting on flat ground, see “Appendix C - Flat Ground Planting” on page 113.

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YP625PD Table of Contents Index Introduction 12

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Figure 2

Serial Number Plate

31941

present. “optional” indicates an operator action that is not
required.

Owner Assistance

If you need customer service or repair parts, contact a
Great Plains dealer. They have trained personnel, repair
parts and equipment specially designed for Great Plains
products.

Refer to Figure 2

Your machine’s parts were specially designed and
should only be replaced with Great Plains parts. Always
use the serial and model number when ordering parts
from your Great Plains dealer. The serial-number plate is
located on the right end of the rear face of the main tool
bar.

Record your YP625PD Planter model and serial number
here for quick reference:

Model Number:__________________________

Serial Number: __________________________

Your Great Plains dealer wants you to be satisfied with
your new machine. If you do not understand any part of
this manual or are not satisfied with the service received,
please take the following actions.

1. Discuss the matter with your dealership service
manager. Make sure they are aware of any problems
so they can assist you.

2. If you are still unsatisfied, seek out the owner or
general manager of the dealership.

For further assistance write to:

Product Support

Great Plains Mfg. Inc., Service Department

PO Box 5060

Salina, KS 67402-5060 USA

785-823-3276

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06/12/2019 Table of Contents Index 401-754M

Introduction

”

YP625PD Table of Contents Index Preparation and Setup 13

Preparation and Setup

This section helps you prepare your tractor and
YP625PD Planter for use, and covers tasks that need to
be done seasonally, or when the tractor/planter
configuration changes.

Before using the planter in the field, you must hitch it to a
suitable tractor, inspect systems and level the planter.
Before using the planter for the first time, and periodically
thereafter, certain adjustments and calibrations are
required.

Initial Setup

See “Appendix B - Initial Setup” on page 107 for
first-time/infrequent setup tasks, including:

• Install seed monitor console in tractor (page 107).

• Set marker extension (Option, page 110).

• Install any Options not factory- or dealer-installed.

Post-Delivery/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 79).

• De-grease exposed cylinder rods if so protected at

last storage.

Pre-Planting Setup

Complete this checklist before routine setup:

 Read and understand “Important Safety

Information” on page 1.

 Check that all working parts are moving freely, bolts

are tight, and cotter pins are spread.

 Check that all grease fittings are in place and

lubricated. See “Lubrication” on page 85.

 Check that all safety decals and reflectors are

correctly located and legible. Replace if damaged.
See “Safety Decals” on page 6.

 Inflate tires to pressure recommended and tighten

wheel bolts as specified. See “Tire Inflation Chart”
on page 96.

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YP625PD Table of Contents Index Preparation and Setup 14

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Figure 3

Tongue on Jack

25447

1

1

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Figure 4

Jack in Storage

17930

2

2

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Figure 5

Connector Identification

25236
31033
31950

a

b

c

abc

Hitching Tractor to Planter

Crushing Hazard:

Do not stand or place any body part between planter and
moving tractor. You may be severely injured or killed by being
crushed between the tractor and planter. Stop tractor engine
and set parking brake before attaching cables and hoses.

To prevent soil compaction on rows, set tractor wheels
between rows. For hillsides and steep slopes, set tractor
wheels as wide as possible for maximum stability.

Refer to Figure 3

1. Use jack to raise and lower planter tongue.

Refer to Figure 4

2. After hitching tractor to planter, store jack on storage
tube on top of planter tongue.

3. Secure planter safety chain to an anchor on the
tractor capable of pulling the unit.

Electrical Hookup

Refer to Figure 5 (depicting an SAE J560b lighting
connector; your connector may vary if it has been
replaced due to different electrical conventions)

Your planter is equipped with systems that require
separate electrical connections. For future reference,
note any optional connectors on this checklist.

 Lighting connector (standard)
 Monitor connector (standard)
 Speed Sensor connector (standard)
 __________________________

Make sure tractor is shut down with accessory power off
before making connections.

These connections may be made in any order. The key
requirement is that all connections be made prior to
planter movement.

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YP625PD Table of Contents Index Preparation and Setup 15

Null4:

Figure 6

Hose Clamps

27270

Hydraulic Hose Hookup

High Pressure Fluid Hazard:

Shut down tractor before making hydraulic connections.
Only trained personnel should work with system hydraulics.

Escaping fluid under pressure can have sufficient pressure to
penetrate the skin causing serious injury. If an accident
occurs, seek immediate medical assistance from a physician
familiar with this type of injury.

Use paper or cardboard, NOT BODY PARTS, to check for
leaks. Wear protective gloves and safety glasses or goggles
when working with hydraulic systems.

Refer to Figure 6

Hydraulic hoses are color coded to help you hookup
hoses to your tractor outlets. Hoses that go to the same
remote valve have coded ties with the same color.

Null4.aac: anchor

Color Hydraulic Function

Black Fan

Green Markers

Blue Lift

Refer to Figure 6

To distinguish hoses on the same hydraulic circuit, refer
to the cylinder symbols on the clamps.

• The hose under an extended-cylinder symbol feeds

a cylinder base end or motor return line.

• The hose under a retracted-cylinder symbol feeds a

cylinder rod end, or motor pressure line.

Low Population Risk:

If the motor hose connections are reversed (relative to
operator expectations), the motor runs in reverse, but at a
speed and air flow too low for correct seed metering.

Secure hoses and cables so that they have sufficient
slack for hitch movements, but cannot get caught
between moving parts of planter. Failure to safely route
and secure hoses and cables could result in damage
requiring component repair/replacement, and lost field
time.

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Null4:

Figure 7

Setting Tool Bar Height

31855

1

2

Null4:

Figure 8

Hitch Height Adjustment

16865

3

4

11223

4

Null4:

Figure 9

Ground Wheel Height

29880

6

5

5

6

Leveling Planter

Refer to Figure 7

During initial setup and periodically throughout the
season, check that the planter runs level. When planting,
the top of the main frame should be parallel to the
ground.

To level the planter, the distance from bottom of the
mainframe tube to the ground, must be:

66 cm

with the planter lowered into planting position.

With the openers in the ground, this tool bar height
normally requires a hitch height of:

36.8 cm

measured from the bottom of the tongue to the ground.

Refer to Figure 8 (showing one of two hitch bolts)

To obtain the correct height, remove the two hitch
bolts , and reposition the planter hitch on the tongue.

Null4.aac:

Sudden Hitch Slump or Failure Risks:

Always have two bolts through two holes on both hitch and
tongue. Never rely on a single bolt.

The hitch can be inverted in the tongue for extreme
height changes.

Wheel Adjustment for Leveling

Refer to Figure 9

If the target tool bar height cannot be achieved with the
frame level, an adjustment can be made by relocating
the wheel axles in the arms. This lowers the planter by
about 5.1 cm.

Block up the frame to remove weight from tires. Remove
bolts , located in lower holes, securing transport
ground tire assembly to unit. Move wheel assembly and
secure assembly to upper hole using previously
removed bolt.

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Null4:

Figure 10

Monitor Primary Screen

31807

Monitor Setup

Refer to Figure 21

®

The standard DICKEY-john

PM400 system monitors the

following elements of a YP625PD planter:

• Seeds at each row unit seed tube.

• Ground speed.

See “Seed Monitor Console Installation” on page 107.

Refer to the DICKEY-john

Planter Monitor Operator’s Manual

®

DICKEY-john

(11001-1372) for monitor

® PM300-332-400

operations.

After installation, and prior to first field use, the monitor
must be setup with the row spacing and speed sensor
constant, as well as your preferences for information
display. Row count is auto-assigned, but any other

DICKEY-john

®

defaults are not likely to be correct for

your planter.

Row spacing data may be found in the Appendix.

For speed setup, Great Plains recommends using the
122 m (400-foot) calibration described in the

DICKEY-john

®

manual, rather than using the theoretical
“# of pulses” shown in Appendix B. Perform the
calibration run in representative field conditions, as soil
conditions, surface looseness and other tillage practices
can cause variations in the effective rolling radius of the
ground drive wheel.

Prior to each planting session, set any desired limits for
speed and population for the current crop.

Null4:

Marker Setup (Option)

Prior to first use, check and adjust:

• “Marker Speed Adjustment” on page 110.

Prior to first use, and whenever changing row spacings,
set or reset:

• “Marker Extension” on page 110.

Prior to each planting session, check and adjust:

• “Marker Disk Adjustment” on page 46.

MetaData: End of “

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Preparation and Setup

”

YP625PD Table of Contents Index Operating Instructions 18

High Pressure Fluid Hazard:

Relieve pressure and shut down tractor before connecting,
disconnecting or checking hydraulic lines. Use a piece of
paper or cardboard, NOT BODY PARTS, to check for leaks.
Wear protective gloves and safety glasses or goggles when
working with hydraulic systems. Escaping fluid under pressure
can have sufficient pressure to penetrate the skin causing
serious injury. If an accident occurs, seek immediate medical
assistance from a physician familiar with this type of injury.

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
YP625PD planter to the field.

 Carefully read “Important Safety Information” on

page 1.

 Treated seed, or Fertilizer Option: Review the

application instructions and Material Safety Data
Sheet (MSDS) for the seed and/or fertilizer(s).

 Install seed disks appropriate for crop. See “Air-Pro

Meter Disk Installation

 Lubricate planter as indicated under “Lubrication”

on page 85.

 Check all tires for proper inflation. See “Tire

Inflation Chart” on page 96.

 Check all bolts, pins, and fasteners. Torque as

shown in “Torque Values Chart” on page 98.

 Check planter 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.

” on page 55.

®

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Machine Damage Risks:

Always fold markers (page 32) before raising or lowering.
Disengage transport locks (page 19) before lowering.
Always raise the planter for any reverse/backing.
Except on pavement, begin forward motion before lowering, as
rows move backward slightly as arms swing up.

Figure 11

Planter Lift System

25463

1

1

Null4:

Figure 12

Lift Cylinder Lock

31859

1

1

Raising/Lowering Planter

Refer to Figure 11

Planter raising and lowering relies on four lift cylinders .
To raise or lower the planter, move the lever for the Lift
circuit.

Gradual Crushing Hazard:

Do not rely on hydraulic pressure alone to keep the planter
raised. Use transport/lift locks (page 19) when working
around a raised planter. The bypass orifices in the re-phasing
system cause it to slowly lower.

Re-Phasing Lift System

In typical use during a single planting operation, it is
normal for the lift cylinders to get out of phase, resulting
in uneven raising and lowering of the planter.

Every 8 to 10 passes, re-phase the cylinders with this
procedure:

1. Lower the planter completely, and hold the hydraulic

lever or switch in Retract for several seconds after
the planter reaches full lowering, or until all cylinders
are fully retracted.

2. When all cylinders are fully retracted, momentarily

reverse (Extend) the control to raise the
planter

Lift Cylinder Locks

Use transport locks to hold the planter at raised for
transport, adjustments, maintenance and storage.

Refer to Figure 12

Transport locks are present on all wheel modules.
To install cylinder stops:

1. Raise planter to transport position (page 19).

2. Pivot cylinder stops into engagement with lift

cylinder rods. The stop channels snap into position.

3. Lower planter onto stops.

Raise planter, and hold at raised, before releasing
transport locks.

1

2in (12mm).

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Approximate Weights of

Representative

Model

Configurations

YP625PD18TP110

Base Planter

4000 kg

Typical¹ Empty

4500 kg

Typical¹ Full

5800 kg

5300 kg

6600 kg

Maximum² Empty

Maximum² Full

¹ Typical: No Coulters, Markers, Fertilizer or Row Cleaners.

² Maximum: Zone Coulters, Markers, Terra-Tine Row Cleaners

Transport

Loss of Control Hazard:

Never tow an implement that weighs more than 150% of the
tractor. 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.

The planter can weigh over 7000 kg, depending on
configuration and seed load. The tractor MUST be rated for
the load and must weigh at least 67% of the load. If the tractor
is not rated for at least 7000 kg, calculate or obtain a scale
weight of the planter. See chart at right for typical
configuration weights.

Do not tow if planter exceeds the load rating of the vehicle.

Braking and Loss of Control Hazard:

Do not exceed 20 mph (32 kph).

Reduction of Control Risk:

Seed and fertilizer may be loaded prior to travel, but increase
stopping distance, increase the need for caution in turns and
braking, and increase tire wear.

Typical YP625PD Planter Weights

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YP625PD Table of Contents Index Operating Instructions 21

Transport Steps

Transport only with markers stowed (page 32).

1. Check that planter is securely hitched to a sufficient

tractor or towing vehicle (page 14).

2. Always use a locking-style hitch pin sized to match

holes in hitch and draw-bar (minimum
1-inch-diameter, heat-treated pin).

3. Attach safety chain to tractor or towing vehicle with

enough slack to permit turning (page 14).

4. Verify correct operation of lights.

5. Fold markers if unfolded (Option, page 32).

6. Raise planter (page 19).

7. Install cylinder locks (page 19).

8. Unload hoppers and tank(s) before transporting if at

all possible. The planter can be transported with a
full material load, but the added weight increases
stopping distance and decreases maneuverability.

Increased Hazards and Wear Risks:

Seed may be loaded prior to travel, but increases stopping
distance, increases the need for caution in turns and braking,
and increases tire wear.

9. If any seed is in hoppers or delivery hoses, close

seed inlet shutters at meters (page 56).

10. Check that tires are properly inflated (page 96).

11. Plan the route. Avoid steep hills.

12. Always have lights on for highway operation.

13. Do not exceed 32 kph. Comply with all national,

regional and local laws when traveling on public
roads.

14. Remember that the planter may be wider than the

tractor or towing vehicle. Allow safe clearance.

15. Transport slowly over uneven or rough terrain.

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YP625PD Table of Contents Index Operating Instructions 22

Null4:

Figure 13

Hopper Lid Hinge Lugs

28131

1

3

1

3

2

Null4:

Figure 14

Air-Pro

®

Row Hopper

29975

4

5

9

2

U

D

F

B

L

R

7

6

8

1

4567891

Loading Materials

Hopper Operations

Refer to Figure 13 and Figure 14

Hopper lids have distinct ends:

• the hinge end (with two lugs) mates with the front

end of the hopper.

• the latch end (with a single lug) mates with the

rear end of the hopper.

To open a hopper:

1. Pull the rear of the lid edge to the rear.

2. Swing the lid up at rear.

3. Disengage the lid at the front lugs.

4. Park the lid on the front lip of the hopper, using the

hook-plate feature inside the lid (see Figure 15 on
page 23).

The seed hoppers themselves are designed to be
removed, but are not removed for routine operations.

Loading Seed

5. Install correct seed disks (page 55).

6. Close all seed inlet shutters (page 56).

7. Check that each hopper is correctly seated and

secured:

pivot hooks engage at front,
latch engaged at rear,
seed hose secured to
discharge weldment with
clamp.

8. The hopper slide gate may be left open (by pulling

back), and doing so slightly increases seed capacity.

 If slide gate is open for seed loading, seed inlet

shutters must be closed unless the planter is already
at the field. Transporting with both gates and shutters
open can plug meters.

9. Open hopper lid .

10. Inspect the hopper for leftover seed and debris.

Clean out anything other than the seed to be
planted. See “Material Clean-Out” on page 72.

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Figure 15

Adding Seed Lubricant

29976

Loading Seed, continued

Possible Agricultural Chemical Hazards:

Read and follow all supplier cautions for safe handling of
treated seed.

Irritant and Chronic Exposure Hazards:

Do not mix lubricants into seed with hands or any part of body.
Wear protective equipment. Use tools. See page 4.

11. Pre-mix seed and lubricant. For clean seeds other

than milo, cotton, and sunflowers sprinkle Ezee
Glide Plus seed lubricant at a rate of 71 ml per
42 liters (one hopper) of seed.

For milo, cotton, and sunflowers double the
application to 142 ml (or more) per 42 liters of seed.

Population Risk:

The seed must be properly lubricated, starting with the first
seed through the meter. If unable to pre-mix prior to loading,
pre-mix at least 4 liters of seed per hopper, and load this seed
first. Fill the hoppers to half full with fresh seed. Add half the
lubricant and stir. Complete filling the hoppers and sprinkle
the remaining lubricant on top.

12. Add seed and lubricant to hoppers.

Refer to Figure 13 and Figure 14 on page 22

13. Close lids. With lid tilted up at a slight angle, hook

the two front hinge lugs under the front hopper lip.
Swing down, keeping fingers clear of lug, and latch
the single rear lid lug on rear hopper lip.

Equipment Loss Risk:

Check that all 3 lid lugs are completely under the hopper lip,
or the lid may come off in transport.

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YP625PD Table of Contents Index Operating Instructions 24

Null4:

Figure 16

Empty 2- and 3-Outlet Hoppers

31866

1

Null4:

Figure 17

Hopper Latch Open and Closed

31866

2

3

1

Null4:

Figure 18

Hopper Lid Open

31865

4

5

2

3

4

5

Loading Dry Fertilizer

If fertilizer will not be applied, uncouple the fertilizer
meter shaft at the left end of the left hopper. Pin the
coupler clear of the shaft joint.

Loading fertilizer prior to transport is not recommended.
Although the meters are not turning during transport, it is
possible for some material to spill through the meters,
particularly on rough roads.

Suitable Materials

Use only dry granular fertilizer. Granules must flow freely,
and must have a maximum diameter smaller than 7 mm
(to avoid bridging clogs in the applicator tube outlets).

Agricultural Chemical Hazard:

Wear protective equipment suitable for the material to be used,
and the material previously dispensed from the hoppers. Avoid
contact with skin or eyes. Avoid breathing dust.

System Inspection

Verify that both rear cradle pins are installed on all
hoppers. See Figure 82 on page 75.

Refer to Figure 16

Remove the lid on each hopper and inspect for:

• residual fertilizer incompatible with next use

• contaminants

• debris that might clog the meter inlets

• trapped animals, lost tools, etc.

If it is necessary to clean a hopper, see “Dry Fertilizer

Clean-Out” on page 75.

Hopper Lid Operation

Refer to Figure 17 and Figure 19

To unlock the hopper lid, lift the rubber latches out of
the metal keepers .

 The keeper hardware tends to snag under the

hopper lip. Pull the lid edge forward and lift.

Refer to Figure 18

To open the lid, lift the front edge up and slide the lid
back into a vertical position behind the hopper. The lid is
held by retaining straps .

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Null4:

Figure 19

Hopper Lid Rear Catch Plate

31864

6

5

4

2

Null4:

Null4:
Null4:

Material Loss / Machine Damage Risks:

Pin coupler clear of shaft gap. It may be possible to insert the
pin through both the coupler and the driving shaft .
Do not do this. This may leave the coupler and driven shaft in
contact. Field motion could cause the meters to operate. The
coupler and driven shaft could also be damaged.

Figure 20

Dry Fertilizer Drive Coupler

31897

243

1

2

3

4

123

4

Refer to Figure 17, 18 and 19

When closing the lid make sure that:

• the rear catch plates are under the hopper rear lip,

• the keeper hardware is under the front lip, and

• the ball of each rubber latch is seated in the

keeper.
(If only the handle “T” is seated, the lid is not secure.)

Dry Fertilizer Operation

Great Plains recommends checking with your local
agronomist prior to setting the rate, as soil conditions
vary.

The fertilizer meters are driven from the same ground
drive that powers the seed metering system. When the
planter is lowered and in motion, the meters operate, and
fertilizer is applied based on the rate controlled by the
selection of fertilizer transmission sprockets.

See the Seed and Fertilizer Rate manual (401-754B)
for rate charts and detailed information on rate setting.

The outlets of the fertilizer meters are normally
connected to fertilizer drop tubes at the dry fertilizer
coulters. See page 44 for adjustment of drop tube height
and angle.

Refer to Figure 20

If fertilizer will not be applied, disengage the drive
coupler at the left end of the left fertilizer hopper:

1. Remove the pin from the coupler .

2. Slide the coupler left, completely off the driven

shaft , and clear of both the shaft gap and the pin
hole in the driving shaft .

3. Re-insert the pin in the driving shaft (not through the

coupler). Secure pin to shaft with wire bail.

To restore fertilizer drive operation, first rotate the driven
shaft to align its pin hole with the hole in the coupler.
Slide the coupler right. Re-insert pin through both
coupler and driven shaft. Secure pin with wire bail.

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Null4:

Figure 21

Monitor: Typical Operate Screen

31808

Monitor Operation

Refer to Figure 21

®

The standard DICKEY-john
following elements of a YP625PD planter:

• Seeds at each row unit seed tube:

PM400 system monitors the

ESCAPE

Medium and larger seeds are individually counted
with high accuracy. Small seed sensing may be
limited to seed stoppage (“blockage”) detection.

• Ground speed:

The standard magnetic pickup
allows the monitor to calculate and report population.

For installation, see “Seed Monitor Console
Installation” on page 107. For initial console setup, see
“Seed Monitor Console Quick-Start” on page 108.

Once setup for the planter and your display preferences,
and configured for the current crop rates/limits, the
monitor is typically used in the “OPERATE” mode. Refer

to the DICKEY-john

Monitor Operator’s Manual

®

DICKEY-john

(11001-1372) for monitor operation

details.

®

Both the DICKEY-john

manual and this manual contain
trouble-shooting information for apparent monitor
problems. Check both manuals, as the focus and content
is not identical.

Null4:

a

at the ground drive

® PM300-332-400 Planter

33.1

5.8

123456

GROUND

SPEED
SETUP

ACCY

SETUP

LIMITS
SETUP

SEED
COUNT
MODE

PLANTER

SETUP

OPERATE

DISPLAY

&

SERVICE

PM400

SPEED

AREA

MODE

ENTER

a. An optional radar speed sensor is available, as are Y-cables to accept input from an existing radar on the tractor. The magnetic pickup may

be preferred, as both speed and seed flow fall to zero at lift. With radar, the monitor cannot tell that seeding should have stopped. You may
experience more nuisance alarms with radar.

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Null4:

Figure 22

Planter Air System for Air-Pro

®

Seed Metering

29973

1

3

15

16

8

6

4

2

17

9

5

7

U

D

F

B

L

R

1713

2814

3915

41016

51117612

Air System Operation

Meter Pressurization System Elements ( shows air direction)

Hydraulic Fan Seed Hose Seed Tube Sensor (Figure 23)

Butterfly Valve Air-Pro® Seed Meter Sensor Port (Figure 23)

Meter Pressurization Air Seed Inlet Shutter Pressure Sensor Lines

Row Pressurizing Tube Seed Pool (Figure 23) Pressure Sensor Chamber

Seed Hopper Disk Seed Pocket (Cell) Magnehelic® Pressure Gauge

Slide Gate Seed Hose (Figure 23)

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Null4:

Null4:
Null4:
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 Do not operate in the ground with the fan shut off, or

with insufficient manifold pressure. The meters will
completely fill with seed. Meter clean-out may be
required to resume normal operation.

Figure 23

Air-Pro

®

Meter, Disk Side

31040

14

12

10

4

9

8

11

13

1

2

345789101112131415161713

Air and Seeding System Overview

Refer to Figure 22, on page 27, and Figure 23.

The hydraulic fan supplies air exclusively for meter
operation. Fan rpm is operator-adjusted (page 30),
normally via the tractor circuit’s hydraulic flow control.

A manually-adjusted butterfly valve is provided at the
fan outlet. See page 30 for valve adjustment.

The manifold system delivers fan air across the
planter. It includes passive internal design features to
balance pressure across the planter.

Separate pressurization tubes route manifold air to
each row unit.

Seed is delivered from the seed box by gravity
through the sliding seed tubes , to the inlet of the
Air-Pro

A manually adjusted inlet shutter controls the size of
the seed pool at the base of the meter. The shutter

also minimizes air loss back up the seed inlet tube, and
is also used during row shut off. See page 53 for shutter
adjustments.

At the meter, pressurization air exits the meter through
the seed pockets of the disk, and holds seed in the
pockets until released above the seed tube .

In the seed tube, the seed sensor detects passage of
seeds. Medium size and large seeds are counted
individually. With smaller seeds, most are detected,
allowing the monitor to detect stoppages.

Several rows have a pressure sensor port for the
meter pressurization system. A line from each of
these rows is connected to a chamber to average the

pressures.

The averaged pressure is reported by a Magnehelic
gauge visible to the tractor operator. See page 40 for

use of the gauge in making fan adjustments.

A sensor in each seed tube reports seed passage to
the seed monitor. Larger seeds are counted individually.
For smaller seeds, the system acts as a blockage
monitor.

 Use of the special blank disk (page 57), and closing

 On any row, running a normal disk with no seed, or

®

seed meter .

®a

the seed inlet shutter (page 53), are particularly
important when a sensor row is shut off.

with an open empty inlet, unbalances the air system.
Doing either at a sensor row causes the gauge to
mis-report as well.

a. Magnehelic® is a registered trademark of Dwyer Instruments, Inc.

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Null4:

Null4:

Figure 24

Hydraulics at Fan

31869

If the fan is connected in reverse, it may not run at all (due to
no oil source at the return connection). If oil is present, oil
bypass at the check valve prevents the fan from reaching
high rpm. A reversed fan may send some air to the meters, but
is incapable of providing reliable air flow for planting.

4

1

2

3

4

1

234

1

Fan speed can change as oil heats to operating temperature.
Re-check meter pressurization more often during early
operations.

Fan Circuit Operation

See also “Fan and Adjustment” on page 40.

Refer to Figure 24

Two hydraulic hoses serve the fan, and must be properly
connected for the fan to operate in the correct
direction , and at recommended speeds. See
“Hydraulic Hose Hookup” on page 15.

1. Connect the motor return line , to remote circuit
return (Extend port) or to sump.

The planter includes a pressure-relief QD coupler for
the return line. This prevents motor damage in the
event that the return line is not connected, or is
connected incorrectly; however, an oil spill results if
the return line is not correctly connected.

2. Connect the motor inlet line to a tractor remote
capable of 20 liters per minute. If a priority remote is
available, use it for the fan.

3. The fan hydraulic circuit includes a check valve ,
which provides a relief path for oil at motor shutoff.
If the fan is connected in reverse, flow through this
valve results in low fan rpm, providing strong
indication reversed connection.

Correct fan direction is shown at . If reversed fan is
suspected, observe it during shutoff, as the direction
of motion is easier to see at lower rpms as it slows to
a stop (initial startup is virtually instantaneous,
making observation at start difficult).

Fan speed is controlled by the tractor circuit and butterfly
valve (and not the seed monitor).

You may stop the fan by setting the circuit to Neutral or
Float. The check valve slows the blades to a stop by
locally recirculating the oil.

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Null4:

Butterfly Valve Operation:

To adjust, loosen bolt and rotate the handle .
Re-tighten bolt.

0 is wide open - maximum air flow.

90 is closed - minimum air flow.

The valve provides the most effect at settings between
20 and 70.

Starting at 30 reduces the fan workload.

Starting at 45 provides the most adjustment range up or
down.

 You may find that different crop, seed disk and rate

range combinations need different valve settings. If
so, make a note of the valve angle on the chart in the
Seed Rate manual.

Figure 25

Fan Butterfly Valve Handle

25137

1

2

1

2

20

45

70

Low Population Risk at Turns:

The fan requires up to 17 liters/min. This figure does not
include oil for lift/lower or oil for marker operation.
Aggressive lift/lower operations, and simultaneous lift/marker
operations, can reduce fan rpm below that needed to
pressurize meter disks. If seed falls out of pockets, low
population bands will occur shortly after turns.

Unless the tractor has generous oil flow capacity, raise/fold
markers before lift, and lift slowly. Watch meter pressurization
and tune operations to keep it at planting levels in turns.

Fan General Operating Information

Adjust the fan to provide the meter pressurization
recommended for the seed disk, seed, and seed density.
See the tables and charts for recommended values in the
Seed Rate Manual.

Normal gauge readings are in the 0.8in to 4.0in water
pressure range, and vary considerably with crop.

Refer to Figure 25

Use tractor remote hydraulic valve flow control to set fan
speed and butterfly valve adjustment to make fine
adjustments to meter pressurization. Precise technique
depends on tractor capabilities:

90

60

30

0

848-020C

• The objective is to obtain recommended meter

pressurization, and maintain it during end-of-pass
marker fold, lift and turn.

• For any setup adjustment, operate the tractor engine

at typical field rpms, and not at idle.

• Preset the butterfly valve. Use any setting that you

previously developed for the crop/disk/range (see
Note at right), otherwise:

If the tractor has fine control of remote flow rates,
and consistent flow at varying tractor engine rpm,
initially set the butterfly valve to 30 or less.

If the tractor has only coarse control of flow, initially
set the butterfly valve to 45.

• Set the fan circuit flow to bring the gauge reading to

• Fine tune the meter pressurization with the butterfly

• If the tractor has marginal flow available, or the lift

Always start the fan with a low flow setting.

Gradually bring fan up to the recommended initial meter
pressurization.

At excessive rpm, too much air flow can cause:

• oil heating

• slow lift times

If desired pressure cannot be reached, or require
unusually high oil flow at low butterfly valve settings,
chances are the fan is running backwards. Reverse the
inlet/return lines at the hitch.

06/12/2019 Table of Contents Index 401-754M

near the recommended value.

valve.

circuit has priority, you may need to experiment with
combinations of fan flow and butterfly valve settings.

YP625PD Table of Contents Index Operating Instructions 31

Null4:

Figure 26

Air-Pro

®

Seed Meter at Row

29825

3

2

1

5

6

4

7

8

9

123456789

Air-Pro® Meter Operation

Refer to Figure 26

The meter disk is driven, top forward, by a chain drive
(not shown) always connected to the planter drive shaft.
At non-planting rows, use a blank disk (page 57).

Seed is air-delivered to the inlet above the air release
screen . Seed customarily fills to the top of the screen,
blocking further air flow from the seed delivery system,
until the seed level falls below the screen.

Seed enters the meter at the seed inlet shutter (if
open), and forms a seed pool at the base of the meter.
Seed pool size is controlled by the shutter handle
setting (which is the only user adjustment at the meter).
Initial shutter settings are given in the seed rate charts.

Meter pressurization air enters the meter at , and exits
the meter primarily at the seed pockets in the seed disk.
The pressure differential holds seed in the disk
pockets rising from the seed pool. Excess seed at a
pocket is picked off by the tickler brushes .

The strip and drop brushes block meter pressurization
air. Seeds passing the drop brush are free to fall into
the seed tube, and are detected by the seed sensor .

Meter Operation

1. Install disks for your crop/population range per the
Seed and Fertilizer Rate manual and the
instructions beginning on page 55 of this manual.

2. Open the shutter at planting rows to the
recommended initial setting (from the Seed Rate
charts). At unused rows, install a blank disk
(page 57) and close shutter.

3. Set sprocket indexing if staggering a twin-row crop
(see Seed and Fertilizer Rate manual for details).

4. Operate fan to achieve suggested manifold pressure
(Seed and Fertilizer Rate manual, and page 40).

5. Open slide gates to fill meters.

6. With all rows primed, rotate meters one turn to fill
pockets to edge of drop brush. Rotate the drive shaft
(top forward) with a 23 mm wrench, or raise and
rotate ground drive wheel (top forward).

7. Leave fan running (to keep seed in top pockets).
Re-install rain covers. Commence planting.
Meter operation is automatic from this point on.

See also:
“Seed Pool Troubleshooting” on page 63,
“Meter Clean-Out” on page 74, and
“Meter Brush Maintenance” on page 76.

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YP625PD Table of Contents Index Operating Instructions 32

Overhead, Crushing and Sharp Object Hazards:

Do not allow anyone to stand near or beyond the end of the
wings during marker operations. There is risk of serious injury
or death for anyone in the path of a marker. Marker arms are
heavy, are under tremendous hydraulic power, and may move
suddenly if the hydraulic system is damaged or needs bleeding.
Marker discs may be sharp.

Marker Operation (Option)

Before Operating Markers

• Make sure cylinders are properly bled. See “Marker

Maintenance (Option)” on page 81.

• This section presumes correct marker extension for

your pass spacing. If this has not been set, or needs
to be changed, see “Marker Extension” on
page 110.

• Markers are equipped with an automatic sequence

valve that controls which side activates, as well as
marker deployment speed. Marker folding speed is
adjusted via set screws on the sequence valve body.
Excessive folding speed may damage markers. Set
speed prior to first field operations. See “Marker

Speed Adjustment” on page 110.

Marker Unfold (one side)

1. Move tractor hydraulic control (lever or switch) for
the marker circuit (typically to Extend). Hold until
marker is completely unfolded. Do not leave tractor
control in detent.

2. If the marker side operating is not the desired side,
let it unfold part way, and move the tractor’s circuit
control to Retract. When the marker is folded, move
the circuit control to Extend to activate the other side.

Both Sides Unfolded

With both markers in the upright/tilted positions:

1. Unfold either side, and when completely deployed:

2. Move lever/switch to Retract momentarily, and return
to Extend to deploy other side.

Row Marker Operation

To alternate which side is marked:

1. Move the tractor’s circuit control to Retract. Hold until
marker is folded.

2. Move the tractor’s circuit control to Extend. Hold until
the new side’s marker is fully unfolded.

3. Return tractor control to neutral/off.

Folding The Markers

If your planter has markers, fold them before performing
a lift operation.

1. Move the tractor’s circuit control to Retract. Hold until
marker is folded.

2. Tilt markers down for transport or storage.

Field Set-Up Checklists

Use the following tables to develop a final checklist for
your tractor/planter configuration. Additional or fewer
steps may be necessary depending on tractor features,
planter options and planting accessories.

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YP625PD Table of Contents Index Operating Instructions 33

Null4:

Mechanical Checklist (Hitching) Page

Null4:

Air System Checklist Page

Planter hitched 14

Safety chain secured to tractor 14

Parking jack stowed 14

Null4:

Electrical Checklist Page

Verify electrical hookups solid 14

Check seed monitor terminal and observe any
diagnostic messages

Option: Verify that, when planter is lowered,
optional radar speed sensor is pointed at
ground, at an angle approximately 35 below

a

Null4:

Planter Meter Drive Checklist Page

b

horizontal.

a. Refer to monitor manual.
b. Refer to sensor documentation.

Null4:

Hydraulic System Checklist Page

Check tractor hydraulic reservoir full -

Inspect connections for leaks -

Null4:

Row Units Checklist Page

Perform a raise and lower operation 19

Check fan speed and airflow direction

a

a. Operate fan briefly. Observe rotor blades spinning toward

exit port as fan slows to a stop.

Null4:

Mechanical Checklist (post-Hitching) Page

Raise planter.
Disengage transport locks

19

Front-to-rear level 16

Marker extension set 110

Marker disc angle set 46

Markers folded (unless already at start of first
planting row)

Null4.aac:
Null4: Null4:

Fertilizer Checklist Page

Uncouple drive shaft if no fertilizer is being
applied, otherwise …

Install correct DRIVING and DRIVEN sprockets
for desired fertilizer rate

32

Meters Checklist Page

25

a

Check and adjust applicator tubes 44

Load fertilizer at field 24

a. Check Seed and Fertilizer Rate manual.

Fan butterfly valve set 30

Seed loaded. Lids closed. 22

Meter shutters open to chart value 53

No air leaks (except from seed hoppers)

Hoses and tubing - no sags, no pinches
Check both manifold and sensor lines

Hoses fully connected to meters

Check chain lubrication and slack 82

Calibrate speed sensor pulses with planter
lowered.

Seeding: Set/check Range and Transmission
against rate chart

a. Refer to seed monitor manual.
b. Refer to Seed and Fertilizer Rate manual.

Preset depth handles alike. 50

Preset down force springs alike, except in tire
tracks.

Check closing wheel alignment 60

Set press wheels alike, except in tracks. 60

Check action and contact of side depth wheels 51

Check wheel scraper gaps (if installed) 52

Slide gates open 22

Corn?
Check timing of meters for twin-row or triple-row

Check chain tension. Re-connect any loose
idler tensioning springs.

Correct disks for seed

Start fan. Operate at field manifold pressure. 29

Rotate meter drive shafts one turn disks with
seed.

a. Refer to Seed and Fertilizer Rate manual.

a

b

48

a

-

a

31

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YP625PD Table of Contents Index Operating Instructions 34

Field Operation

Perform all steps in “Pre-Start Checklist” on page 18
and “Field Set-Up Checklists” on page 32.

Null4:

First Pass Operation Checklist Page

Slide gates open. Shutters set. 31

1.

Raise planter and line up at start of first

2.

planting row.

Prime meters with seed.

3.

Leave fan running.

Unfold marker on next-row side. 32

4.

Pull forward, lower planter, and begin planting

5.

for a short distance.

Stop. Assess:

6.

19

31

19

• planting depth

• seed spacing

-

• press wheel operation

• fertilizer application (if in use)

Make necessary adjustments 36

7.

Resume planting. -

8.

Null4:

Sharp Field Turnsa Checklist

Fold marker 32

1.

Raise planter when fold is complete 19

2.

Make turn

3.

Lower planter 19

4.

Unfold marker on next-row side. 32

5.

Resume planting.

6.

a. Monitor manifold pressure during end-of-pass operations

and turns. Adjust operations as needed to maintain meter
pressurization.

Null4.aac:

Consult seed monitor for alarms during planting. Check
that reported rates are consistent with your plan.

When reloading seed and fertilizer, check consumption
against anticipated use to that point.

Page

Null4:

Suspending Planting Checklist Page

Stop tractor -

1.

Fan hydraulic circuit to Float or Neutral 29

2.

Hydraulic drive circuit to Float or Neutral -

3.

Fold Marker 32

4.

Raise planter 19

5.

Null4:

Ending Planting Checklist Page

Suspend operations as above, then

1.

Install transport locks 19

2.

Lights ON -

3.

Transport 20

4.

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YP625PD Table of Contents Index Operating Instructions 35

Short-Term Parking

1. Fold markers (page 32).

2. Choose a location with level firm ground. Do not
unhitch on a steep slope.

3. Fully raise planter.

4. Engage transport locks (page 19).

5. Lower planter onto locks.

6. (Option) Close discharge valves at fertilizer tank(s).

7. Set hydraulic circuits to neutral.

8. Disconnect hydraulic lines. Secure them so that they
do not touch the ground.

9. Disconnect electrical cables, capping where
provisioned.

10. Move jack from storage position to side of tongue.

11. Slightly raise tongue with jack.

12. Unhitch.
Restart tractor and pull away from planter.

Long-Term Storage

1. Clean-out fertilizer hoppers per “Dry Fertilizer
Clean-Out” on page 75.

2. Complete Parking steps (page 35). Park the planter
indoors if possible. Great Plains recommends
parking/storing in the raised position with transport
locks in place.

3. See “Material Clean-Out” on page 72. Clear all
seed from seed container, air box, seed delivery
system and meters.

4. Close slide gates and latch hopper lids.

5. Remove seed disks from meters (this is primarily to
relieve pressure on brushes). Clean disks of residue
build-up (see Caution below). Use mild soap,
non-abrasive scrubbers, and hot or warm water. If
using sealed storage, dry disks prior to storage.

Possible Chemical Hazard:

Seed disks will have talc and graphite residue, and may have
residues of hazardous seed treatments. Do not wash disks
where food is prepared, or where cookware or dinnerware is
washed. Wear gloves when washing disks. Avoid spray.
Although the disks are dishwasher-safe, do not wash them in
an appliance also used for food cookware or dinnerware.

6. Tie or tape a small plastic bag over ends of all seed
delivery tubes to prevent insects from entering or
nesting.

7. Close seed inlet shutters at meters (to prevent pest
entry to seed hoses). Thoroughly clean seed and
seed treatment residue from seed meters. See
“Meter Clean-Out” on page 74, for more
information.

8. Clean planter of mud, dirt, excess oil and grease.

9. Lubricate all points listed in Maintenance.

10. Apply grease to exposed cylinder rods to prevent
rust.

11. Inspect planter for worn or damaged parts. Make
repairs and service during off season.

12. Use spray paint to cover scratches, chips, and worn
areas on the planter to protect the metal.

13. Cover planter with a tarp if stored outside.

MetaData: End of “

Operating Instructions

”

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YP625PD Table of Contents Index Adjustments 36

Adjustments

To get full performance from your YP625PD planter, you
need an understanding of all component operations, and
many provide adjustments for optimal field results. Some

Even if your planting conditions rarely change, some of
these items need periodic adjustment due to normal
wear.

of these have been covered earlier in this manual.

Adjus tment Page The Adjustment Affects

Frame height 21 Planting depth consistency

Frame level 16 Planting consistency

Gauge Wheel Cylinder Adjustment 113 Flat Ground Planting

Air System 27

Fan Speed 30 Optimal seed distribution

Meter Pressurization (values from SRMa)

Planting Rate SRM

Marker Adjustments

Marker Extension 110 Intended swath spacing

Marker Speed Adjustment 110 Reliable marker operation

Dry Fertilizer Adjustments

Fertilizer Rate SRM

Dry Fertilizer Release 44 Fertilizer placement

Frame-Mounted Row Accessories (Options)

Terra-Tine Row Cleaners (Option) 45 Row preparation

Frame-Mounted Coulters (Option) 42 Row pre-furrow depth and trash cutting

25AP Row Unit Adjustments

Opener Depth 50 Planting depth

Row Unit Down Pressure 48 Planting depth uniformity

Row Unit Lock-Up 58 Single/twin-row operation

Opener Disk Adjustments 50 Seed depth, seed-to-soil contact

Side Depth Wheels 50 Seed depth, prevents plugging

Adjusting Gauge Wheel Scrapers 52 Consistent seed furrow depth

Seed Meter Setup and Adjustment 53 Consistent seed population

Seed Firmer Adjustments (Option) 59 Seed-soil contact

Press Wheel Adjustment 60 Effective soil coverage

Monitor Adjustments PM

a. SRM: Seed and Fertilizer Rate manual (401-754B)
b. PM: DICKEY-john

®

DICKEY-john

® PM300-332-400 Planter Monitor Operator ’s Manual

40 Consistent seed flow and disk singulation

a

Refer to Seed and Fertilizer Rate manual

a

Application rate

b

Refer to Seed Monitor manual

(11001-1372)

06/12/2019 Table of Contents Index 401-754M

YP625PD Table of Contents Index Adjustments 37

Null4:

Figure 27

Monitor Setup Screen

31809

Null4:

Figure 28

Air-Pro

®

Seed Disks

29594

Setting Material Rates

Full details on rate setting sprocket selection and
installation are found in the Seed and Fertilizer Rate
manual (pub. number 401-754B). This is a summary.
Setting the seeding rate requires the following steps:

1. monitor setup

2. seed disk selection,

3. drive speed Range sprockets,

4. Transmission sprockets,

5. inlet shutters

6. meter pressurization,

7. checking seeding rate.

All rate adjustments are performed at the left end of the
planter. There are no adjustments at the ground drive
assembly. Changes in seed rate do not affect fertilizer
rate.

Planting Rate Details

1. Rate: Monitor configuration:

The seed monitor must be set up with the

• correct row count,

• correct row spacing,

• speed calibration and;

• expected population limits, in order to have

accurately rate reports and useful alarms.

See the Seed and Fertilizer Rate manual (401-754B) and
the DICKEY-john

manual.

If you only plant with the factory configuration of the
planter, you never need to update row count and
spacing. If any rows are unused, adjust the monitor
setup.

Speed calibration must be done prior to first use, and
re-calibration is recommended periodically, particularly if
soil conditions change.

2. Rate: Disk Selection:

The Seed and Fertilizer Rate manual (401-754B) has a
table of recommended disks. Disks are specific to crops.
Some crops have multiple disks available, to cover seed
varieties and different populations, within disk rpm limits.
Disks have a high and low rpm limit, which also
corresponds to a high and low field speed limit. The
charts account for these limits.

See “Air-Pro

If any rows are unused, install special blank disks. See
“Row Unit Shut-Off” on page 56.

®

Planter Monitor operator (PM)

® Meter Disk Installation

” on page 55.

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YP625PD Table of Contents Index Adjustments 38

Null4:

Figure 29

Range Sprockets

31870

Null4:

DRIVING

Null4:

DRIVEN

1

2

1

2

Null4:

Figure 30

Transmission Sprockets

31870

4

Null4:

DRIVING

Null4:

DRIVEN

3

2

4

3

3. Rate: Range Sprockets

Range sprockets provide coarse control of seed rate.

Refer to Figure 29 and Figure 30

All Seed Rate charts specify a DRIVING and DRIVEN
sprocket combination for the Range. Crops with more
than one range are noted as “LOW RANGE” or “HIGH
RANGE” at the top of the chart.

To change Range:

a. Rotate the spring-tensioned idler plate .

Lift chain off the DRIVING and DRIVEN sprockets.

b. Remove pins from shaft ends at DRIVING and

DRIVEN sprockets, as well as at storage shaft .

 There are two or three storage shafts. Their locations

vary depending on machine configuration.

c. Exchange sprockets so that new DRIVING and

DRIVEN sprocket tooth counts (stamped on sprocket
face) match chart. Re-pin all shafts.

d. Remount chain (see page 82). Re-engage idler

plate.

4. Rate: Transmission Sprockets

Transmission sprockets provide fine control of seed rate.
Each chart row provides a rate adjustment of 2 to 3%.

Refer to Figure 30

Each Seed Rate chart row has a unique pairing of
DRIVING and DRIVEN Transmission sprocket.

To change Transmission:

a. Rotate the spring-tensioned idler plate .

Lift chain off the DRIVING and DRIVEN sprockets.

b. Remove pins from shaft ends at DRIVING and

DRIVEN sprockets, as well as at storage shaft at
left end of frame.

c. Exchange sprockets so that new DRIVING and

DRIVEN sprocket tooth counts (stamped on sprocket
face) match chart. Re-pin all shafts.

d. Remount chain (see page 82). Re-engage idler

plate.

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YP625PD Table of Contents Index Adjustments 39

Null4:

Figure 31

Seed Inlet Shutter: Setting III

29607

5

5

Null4:

Figure 32

Meter Pressure Gauge

29842

5. Rate: Seed Inlet Shutter

A consistent seed rate results from having a consistent
number of seeds (usually one) in each pocket of the
seed disk, avoiding “skips” (fewer seeds per pocket) and
“doubles” (excess seed per pocket).

Refer to Figure 31

One of the factors that affects seed pickup at the disk is
having an optimal seed pool (page 54). The depth of the
seed pool is controlled by the seed inlet shutter .

Each Seed Rate chart specifies a suggested initial
shutter setting. See “Seed Inlet Shutter Adjustment” on
page 53 for setting details, and further adjustment.

At unused rows, set the shutter to zero/closed to prevent
loss of meter pressurization air. Install a blank disk. See
“Row Unit Shut-Off” on page 56.

6. Rate: Meter Pressurization

Refer to Figure 32
(which depicts a typical reading for some densities of
corn)

A major factor that affects seed pickup at the disk is
optimal meter pressurization. Fan air holds the seed in
the disk pockets until they pass the drop brush
(page 31).

The Seed and Fertilizer Rate manual has a section with
suggested initial manifold pressures, which may be a
single value, or a graph based on seed density.

Manifold pressure is set by a combination of tractor
circuit lever and fan butterfly valve (page 30). See “Air

System Operation” on page 27.

7. Rate: Checking

Although the seed monitor reports a computed
population based on seeds sensed, only an actual furrow
check provides certainty about the actual seeding rate.
See the Seed and Fertilizer Rate manual.

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YP625PD Table of Contents Index Adjustments 40

1

Null4:

Figure 33

Magnehelic

®

Gauge

29842

Re-zero the Magnehelic® gauge on level ground with the fan
off, and if possible, under no-wind conditions. Turn the setting
screw on the meter face until it reads zero from the tractor
driver’s viewing position.

Port ID for Troubleshooting:

Over-pressure relief port (with plug in place)
Low-pressure port (breather/atmospheric pressure)
High-pressure port (from manifold chamber)

123

4

3

2

4

Small seeds, such as Milo, may be under-reported by
the seed monitor. Use the “Alternate Skip/Double

Check” below to verify seed status at the disc pockets.

Furrow Check:

Expose several seeds in each of several rows, being
careful not to disturb their relative positions. Measure
and average the distance between seeds. Compare this
to the predicted seed spacing for the population in the
Seed Rate Manual.

Any instances of no seed where expected may be a
sign of “skips”. Finding two seeds at the same spot is
clear indication of “doubles”

Fan and Adjustment

1. These steps presume that correct seed disks are

installed (per Seed Rate Manual), and the seed inlet
shutters are set for the seed (page 53).

2. With fan off, check meter pressurization reported by
the Magnehelic

3. Determine the recommended meter pressurization
based on your own notes or the published value in
the Seed Rate Manual.

4. Put tractor in Park and set brakes. Set tractor engine
speed to typical field rpm. Lift planter.

5. Start the fan. Gradually increase fan speed using the
tractor’s hydraulic flow control for the circuit. Using
hydraulic flow and/or the butterfly valve, adjust meter
pressurization to the developed or suggested value
from step 3.

6. Rotate ground drive wheel to fill meters. Meters are
filled when seed begins emerging below two or more
openers. With fan running, put the tractor in Park and
set the brakes. Walk behind the wings, remove
several rain covers, and check for seed in meters by
looking through the clear disks.

7. Re-check meter pressurization. With meters and
disks filled, air loss through empty disk pockets is
reduced, and meter pressurization can change.

8. Begin planting. Troubleshoot any obvious problems
or optional seed monitor alarms.

9. During the first pass, take note of the average
populations reported on the optional seed monitor.

®

gauge. Re-zero as needed.

If the reported seed monitor population varies from
your intentions by a significant amount, it is
imperative to perform a furrow check.

For serious rate variances, for which the source of
the problem and the solution are not quickly
determined, see “Population Troubleshooting
Charts” on page 65.

If the population is only slightly low, the problem can
be skips (periodic empty disk pockets). If slightly
high, the problem can be doubles (period pockets
with double seed). An adjustment to the meter
pressurization may correct either condition (see
step 12).

10. Resume planting.

A small varying population deviation between rows is
normal. If a row is consistently running lower or
higher than the other rows, it could indicate a meter
or seed sensor problem that needs attention.
“Population Troubleshooting Charts” on page 65.

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YP625PD Table of Contents Index Adjustments 41

Insufficient meter pressurization, or unusually rough
fields, can increase the incidence of empty pockets. Be
sure to rule out other causes (such as skipping chains,
meter starvation, incorrect meter disks) before adjusting
meter pressurization to reduce apparent skips.

Excess meter pressurization can increase the incidence
of doubles. Be sure to rule out other causes (such as
incorrect meter disks) before adjusting meter
pressurization to reduce doubles.

Alternate Skip/Double Check

Small seeds, particularly Milo, are less reliably sensed as
skips or doubles by the seed tube sensors, and watching
monitor population is unlikely to locate the pressure
limits. This test can also be quicker for all seeds.

A. After planting a few passes with initial settings,

remove the rain covers from several rows (use rows
with a variety of seed hose lengths and routes).

B. Make a meter pressurization adjustment. Resume

planting for a pass or less.

C. Stop planter motion but leave engine at field rpm and

fan running.

D. Inspect the seed disks closely. Look for empty seed

cells (skips) and cells with multiple seeds (doubles).

E. Repeat step B-to-step D until limits are established.

Record limits. Re-install rain covers. Plant with
median settings.

11. Continue to monitor meter pressurization.
When oil reaches operating temperature, fan speed
can change. Expect to make periodic adjustments to
fan circuit or butterfly valve to maintain ideal meter
pressurization.

12. Skips:
If all else is correct, and the overall average
population is running low (or there are gaps upon
furrow check), the cause may be seeds falling out of
disk pockets before delivery to the seed tube.
Increase meter pressurization to correct this.

13. Doubles:
If all else is correct, and the overall average
population is running high (or there are double seeds
upon furrow check), the cause may be two seeds in
some disk pockets at delivery to the seed tube.
Decrease meter pressurization to correct this.

Fine-Tuning Meter Pressurization

After several passes, and you are comfortable with the
planter’s operation, you can optimize meter
pressurization. Use this method during longer passes, so
there are fewer distractions (and see sidebar regarding
Milo).

1. Observe the current overall average population
reported by the monitor.

2. Adjust the fan speed down, in small steps, waiting
5-10 seconds between adjustments, until skips occur
(actual population begins falling below target). Note
the pressure at which skips begin.

3. Restore pressure to the initial value at step 1.

4. Adjust the fan speed up, by periodic small
increments, until doubles occur (actual population
begins rising above target). Note the pressure at
which doubles begin.

5. Adjust meter pressurization to a value halfway
between the limits established at step 2 and step 4.
This is the ideal value for your crop, disk and
population, providing equal margin against skips and
doubles. Record this value for future use.

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YP625PD Table of Contents Index Adjustments 42

Null4:

Figure 34

Fertilizer Transmission

31871

DRIVING

DRIVEN

Null4:

Figure 35

Frame-Mounted Coulter

31874

2

1

1

2

3

4

5

5

9

Dry Fertilizer Adjustment

There are two adjustment for dry fertilizer:

• Fertilizer Rate (below), and;

• Applicator tube height (page 44).

Dry Fertilizer Rate

The balance of this page is a summary. See Seed and
Fertilizer Rate manual (401-754B) for complete details.

Refer to Figure 34

Dry fertilizer rate is set by a pair of Transmission
sprockets at the left side of the implement. Sprocket
parings for desired application rates and field speeds are
given in charts in the Seed and Fertilizer Rate manual.

 Dry fertilizer rate is independent of seed rate.

Although the dry fertilizer drive relies on the same
ground drive and main shaft as the seed metering
system, changes in seed rate do not affect those drive
components.

Application Rate Risk:

Make field checks to assure you are applying fertilizer at the
desired rate. Fertilizer application rates vary with speed,
material density, material granularity and atmospheric
conditions. The charts provide only approximate rates for a
specific density. See “Dry Fertilizer Rate Check” in the Seed
and Fertilizer Rate manual.

Frame-Mounted Accessory Adjustments

To get full performance from your planter, you need a
good understanding of row cleaner, coulter, fertilizer,
opener, meter, seed firmer, and press wheel operation.

Coulter Adjustments (Option)

Refer to Figure 35 and Figure 36

Frame-mounted coulters are installed on the front face of
the front tool bar. They may have straight shanks
(as shown), or offset shanks.

Coulters normally operate resting on their down-stops,
rising up against the spring as difficult obstacles are
encountered. If the springs are routinely in compression,
coulters are set too deep for the field conditions.

There are 4 adjustment for coulters:

1. coulter height / blade depth (below)

2. blade angle (page 43)

3. row alignment (page 43)

4. blade style (page 43)

 Do not adjust the coulter spring length . It is factory

preset to 25.0-to-25.4 cm.

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Null4:

Figure 36

Coulter Depth

31919

1

6

8

7

1

9

8

6

7

8

1

Null4:

Figure 37

Coulter Blade Angle / Alignment

31874

2

2

3

1

4

1

2

3

4

Coulter Depth

Refer to Figure 36

Set coulter depth prior to first planting. Suggested
depth is 6 mm deeper than coulter depth. See page 50
for planting depth.

Suggested shank length is:

23 cm

for a normal field tool bar height of:

66 cm,

and a typical planting depth of:

10 cm.

When crops or field conditions change, review the
coulter depth and adjust it as needed.

Coulter blades wear. Inspect blades regularly. Lower the
coulters to compensate for wear. If a shank cannot be
further adjusted to compensate for wear, replace blade.

New blade disks have a nominal diameter of:

51.6 cm.

When the diameter of a blade disk is worn to:

37 cm,

replace the blade.

To adjust coulter depth:

• Mark the coulter shanks for the new depth desired.

• Raise the planter and install transport locks

(page 19).

• Loosen jam nuts and set screws at the tool bar.

• Slide the shank up or down as needed. Tighten nuts.

Null4:

Coulter Blade Angle

Refer to Figure 37

For fields where frequent sharp turns are unavoidable,
you can reduce coulter plowing by allowing the coulters
to caster at the pivot casting. Loosen the jam nuts at .
Loosen the set screws just enough to allow the casting
to swivel. Re-tighten the jam nuts. Do not remove the
center stop screw .

Coulter to Row Alignment

The factory configuration sets coulters to run in “zone”
mode, in between the outside and center openers of
each triple. To adjust for other alignments, loosen the
mounting bolts , and re-position the coulter mount.

Coulter Blade Style

Coulter blades are available in two styles:

• fluted, with radial waves, and;

• turbo, with waves tangent to the hub.

To change blade styles, order replacement blades. See
“51 cm (20in) Coulter Blades” on page 92.

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Null4:

Figure 38

Dry Fertilizer Applicator

31872

5

7

6

5

677

Fertilizer Applicator Adjustments (Option)

There are two inter-related adjustment for applicators:

1. release height

2. release angle

 Make coulter adjustments before making applicator

adjustments.

Applicator Release Height

The primary adjustment for release height is the lower
four (of six) holes at the rear end of the applicator arm.
Re-position the applicator mounting bolt to any of the
lower four hole. Before tightening the nut, make sure the
torsion spring leg is also in an arm hole.

Machine Damage Risk:

Do not position the applicator mounting bolt in either of the
top two holes. This would leave the torsion spring leg
unsecured. The applicator angle could vary. The applicator
might strike the coulter disk.

A secondary adjustment for release height is to loosen
the clamping bolts , and slide the applicator arm up or
down the coulter arm.

Machine Damage Risk:

Be sure to leave at least 13 mm clearance between the
applicator torsion spring and the coulter disk. If the clearance
is too small, the spring could strike the coulter disk when it
snaps forward after striking field obstructions.

Applicator Release Angle

Loosen the clamping bolts , and rotate the applicator
arm at the coulter arm.

 Changing applicator angle also changes applicator

release height.

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Null4:

Figure 39

Dual Terra-TineTerra-Tine™

31873

3

3

4

5

Null4:

Figure 40

Ter ra -Tin e™ Fo r ce

13156

Position 1:

Minimum

Force

Position 5:

Maximum

Force

1

2

1

2

Terra-Tine™ Spring Tension (per Tine Disc)

Position Newtons Pounds

15312

27617

39822

412027

513831

31875

3

4

3

5

Dual Terra-Tine™ Adjustment (Option)

Terra-Tine™ row cleaners are aligned on the center-line
of the center opener of each triple row set.

With the implement raised, tine height (at the bottom of
the tines) is normally set to the same height as the lower
edge of the coulter blade (or about 6 mm above opener
depth).

There are three adjustments for these row cleaners:

Refer to Figure 39

1. down-force

2. height

3. row alignment

Excess Wear Risk:

Check that the Terra-Tine™ row cleaner tines DO NOT touch
any other implement components. At least 13 mm clearance is
recommended. Tine contact causes excess wear to all parts
involved.

 All adjustments must be made with the implement in

the fully raised position.

Terra-Tine™ Down Force

Refer to Figure 40

A series of three holes in the spring adjuster and pivot
mount plate provide five combinations for different
levels of spring tension. The following table shows the
down-force levels available.

 Changing force also changes height.

Terra-Tine™ Height

Refer to Figure 39

Adjust down-force before adjusting height. To adjust
height, loosen both set screws . Slide mount up or
down shank. Check row alignment. Tighten set screws.

Terra-Tine™ Row Alignment

The lateral position of the Terra-Tine™ may be changed
by loosening the offset shank set screws (and height
set screws ) and/or the tool bar mount bolts .

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YP625PD Table of Contents Index Adjustments 46

Sharp Overhead Object and Pinch/Crush Hazards:

Never allow anyone near the planter when folding or
unfolding the markers. Markers may fall quickly and
unexpectedly if the hydraulics fail. Anyone beneath may be
injured if hit by an unfolding marker, or caught in a folding

Null4:

Figure 41

Marker Disk Angle

11757

T

2

1

N

W

T

2W1N2

T

Null4:

Figure 42

Axle Height

31734

4

3

3

4

Marker Adjustments (Option)

See also:

• “Initial Marker Setup (Option)” on page 110 for

marker speed and marker extension

• “Marker Operation (Option)” on page 32; and,

• “Marker Maintenance (Option)” on page 81 for

marker shear bolt and marker hydraulic bleeding

Marker Disk Adjustment

Sharp Object Hazard:

Use caution when making adjustments in this area.
Marker disks may be sharp.

Refer to Figure 41

1. To change angle of cut, and the width of the mark,
loosen

For a wider mark , increase the angle of the
marker with respect to the tube . For a narrower
mark , reduce the angle.

 Do not set a marker angle wider than needed to make

a useful mark. Excess angle increases wear on all
marker components.

2. Tighten bolts .

 Direction of travel tends to drive the disk angle to

Wide. If bolts are not tight enough, or loosen over
time, disk slips into the Wide mark configuration.

1

2-inch bolts holding the disk assembly.

Gauge Wheel Height Adjustment

The YP625PD is factory pre-set for planting on 18 cm
beds.This operating height can be reduced by 5 cm, to
13 cm, but relocating the gauge wheel axles.

 For operation on flat ground, do not make this

adjustment. Instead adjust the lift cylinder mounts.
See “Appendix C - Flat Ground Planting” on
page 113.

Refer to Figure 42

1. Raise the planter. Support the frame with jacks or
stands. Retract the lift circuit to raise the tires off the
ground.

2. Remove the axle bolts from the lower holes .

3. Re-install the bolts and axles in the upper holes.

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Null4:

Figure 43

25AP Series Row Unit

31879

2

1

3

4

5

6

7

8

9

10

12

13

14

11

6

25AP Series Row Unit Adjustments

Refer to Figure 43 (which depicts a row unit
populated with most optional accessories supported
for use with the YP625PD)

®

From front to back, a Great Plains 25 Series Air-Pro
unit can include the following capabilities (some
optional):

1. Lock-Up Pin Storage Hole (Hole Standard)
See “Row Unit Shut-Off” on page 56.

2. Down-Pressure Cam (Standard)
Row units are mounted on parallel arms. This
parallel-action mounting allows the row-unit to move
up and down while staying horizontal. Springs add
an adjustable force, set by the cam, to the row
weight. See “Row Unit Down Pressure” on
page 48.

3. Meter Pressurization Air Inlet (Standard)
Pressure-regulated air enters the meter here and
holds seed in the disk pockets. See “Fan and
Adjustment” on page 40.

4. Seed Delivery Hose Inlet (Standard)
When the hopper slide gate (not shown) is open,
gravity carries the seed into the meter at the
shutter . The hose is easily removed for inspection.
There are no adjustments.

5. Air-Pro
See “Air-Pro

6. Seed Inlet Shutter (Standard)
This controls the level of bulk seed at the disk. There
are four operating settings, plus fully open
(clean-out) and fully closed (shut-off or storage). See
“Seed Inlet Shutter Adjustment” on page 53.

7. Side Gauge Wheel Depth (Standard)
The T-handle sets planting depth by controlling the
height of the side gauge wheels relative to the
opener discs. See “Side Gauge Wheel
Adjustment” on page 51.

8. Press Wheel Force, Angle, Stagger (Standard)
The press wheels close the furrow, gently pressing
the soil over the seed to ensure good seed to soil
contact for even emergence. See “Press Wheel
Adjustment” on page 60.

9. Row Unit Lock-Up Hole (Hole Standard)
Pins are standard on some models. With the row unit
raised above level, the lock-up pin is inserted here.
See “Row Unit Shut-Off” on page 56.

10. Opener Discs (Standard)
Row-unit double disc openers create the seedbed
furrow. They have adjustments for angle and
spacing. See “Row-Unit Opener Disk

Adjustments” on page 50.

®

Seed Meter (Standard, Choice of Disks)

® Meter Disk Installation

” on page 55.

row

11. Seed Tube with Sensor (Standard)

Requires no adjustment.

12. Scrapers (Optional, not shown)

Inside scrapers require no adjustment. For gauge
wheel scrapers, see “Adjusting Gauge Wheel
Scrapers (Option)” on page 52.

13. Seed Firmers (Seed Flap Standard, not shown)

An optional seed firmer (Keeton
seed bounce and improves soil contact. It may also
deliver fertilizer. See “Seed Firmer Adjustments” on
page 59.

14. Press Wheel Type (Choice)

A variety of single and dual press wheel assemblies
are available, some region-specific. Consult your
Great Plains dealer.

Equipment Damage Risk:

Do not back up with row units in the ground. To do so will
cause row unit plugging and may result in severe damage.

®

shown) minimizes

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Null4:

Figure 44

Checking Furrow

31879

{

Inspect Furrow Here

Light or no side gauge
wheel tracks

Insufficient down-force
Increase down-force

Gauge wheels compress
loose soil only

Ideal
No adjustment required

Side gauge wheels
making deep tracks

Down-force too high
Reduce down-force

Null4:

Figure 45

Assessing Down-force

1

2

3

Null4:

Figure 46

25AP Series Row Unit Springs

31879

1

1

Row Unit Down Pressure

Refer to Figure 44

The ideal amount of down-force causes the side gauge
wheels to compress any loose surface soil, but not press
a trench into subsoil.

To assess down-force, operate the planter for a short
distance on typical ground (with or without seeding), and
stop. Leave the planter lowered (row units in ground).

At several row units, inspect the furrow created by the
opener discs, but prior to furrow closing by the press
wheels.

 Be sure to inspect rows both in and out of tire tracks.

Null4:

Refer to Figure 45

1. If the side gauge wheels are leaving no tracks, or
light tracks, increase down-force.

2. If the wheels are compressing trash and loose soil,
and leaving clear tracks right at the top of the
subsoil, down-force is probably correct and needs no
adjustment.

3. If the wheels are creating a trench into the subsoil,
down-force is too high and needs to be reduced.

Adjusting Down-Force

Refer to Figure 46

Row unit springs provide the primary down pressure
necessary for row unit disks to open a seed trench. The
weight of the row units themselves contributes about
130 pounds (59 kg) of the total force.

The springs allow the row units to float down into
depressions and up over obstructions. Springs also
provide down force on coulters when using optional row
mounted coulters, and provide the primary down force on
seed firmers (optional) and press wheels.

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Null4:

Figure 47

25AP Series Row Unit

Spring Adjustment

31034

3

5

2

2

Cam Notch Pounds Kilograms

zero (out of notch) Lock-Up & Maintenance

one 255 115

two 265 120

three 285 130

four 315 145

five 345 155

six 375 170

tip Do Not Use

Values are down force with hoppers empty 31947

Null4:

Figure 48

Row Unit Minimum Cam (at 1)

27065

4

6

3

Null4:

Figure 49

Row Unit Maximum Cam (at 6)

27065

452

6

An adjuster cam sets down pressure individually for
each row unit. This is useful for penetrating hard soil and
planting in tire tracks. For best results always adjust
tractor tires so they are not ahead of 110 cm rows.

Refer to Figure 48

Use only enough down pressure to cut the seed trench
and maintain proper soil-firming over seed. With a full
seed load, the force on each row is up to 54 kg higher at
start of planting.

Excessive row unit spring force causes premature wear
on row unit components and uneven seed depth. If all
rows are set to cam 6, some lighter planter
configurations could be lifted out of ground contact.

Refer to Figure 47 (shown at cam setting 2),
Figure 48 and Figure 49

To adjust down pressure, use a 29 mm open end wrench
or the tool stored at the left end of the planter.

1. Raise the planter. Although this adjustment can be
made with the planter lowered, the springs will be in
tension, and will require more effort. The extra force
required may also damage tools.

2. Install lift cylinder locks.

3. Put tractor in Park and shut it off.

4. Position wrench on the fixed nut near or slightly
forward of vertical.

5. Pull upper spring link back.

6. Move the adjustment cam to the new setting on
the spring adjust bar .

 Do not set all rows higher than notch four. Using high

settings across all rows causes uneven planting.
Individual rows may be set higher if running in tire
tracks.

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Null4:

Figure 50

Opener Adjustments

31879

2

3

1

1

1

1

1

Null4:

Figure 51

Opener Disc Contact Region

26127

4

5

4

Null4:

Figure 52

Opener Disc Spacers

26128

9

8

6

7

5

67898

9

Row-Unit Opener Disk Adjustments

25 Series openers have three adjustments:

1. planting/seed depth

2. opener disc to disc clearance

3. gauge wheel/opener disk clearance (page 51)

Setting Planting Depth

Refer to Figure 50

The “T” handle sets planting depth by limiting the how
high the side depth gauge wheels ride relative to the
opener disks. The position of the seed tube itself is fixed
relative to the disks, and is not adjusted.

To adjust seed depth, pull the “T” handle up and back,
move it forward or aft, and set it back in a different pair of
holes in the scale.

• For shallower planting, move the “T” handle

forward.

• For deeper planting, move the “T” handle back.

Opener Disc Contact Region

Refer to Figure 51 and Figure 52

Opener disc angle and stagger is not adjustable, but
disc-to-disc spacing is, and may need attention as discs
experience normal wear. Spacers need to be reset when
blades are replaced.

The ideal spacing causes the blades to be in contact for
about 2.5 cm . If you insert two pieces of paper

between the blades, they should slide to within zero
(touching) to 3.8 cm of each other. If zero, the gap
between the blades should not be significantly greater
than the thickness of two sheets of paper.

If the contact region is significantly larger or there is a
large gap, it needs to be adjusted by moving one or more
spacer washers.

Adjusting Disc Contact

1. Raise the planter and install lift cylinder locks.

2. Remove the side gauge wheels on the row unit in
need of adjustment.

3. Remove the bolt retaining the opener disc on
one side. Carefully remove the disc. Do not lose the
hub components and spacer washers , .

4. To reduce the spacing between the discs (the normal
case), move one spacer washer from the inside to
the outside of the disc.

5. Re-assemble and check disk contact.

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Null4:

Figure 53

Disk/Gauge Wheel Alignment

Side Gauge
Wheel

Side Gauge
Wheel

Incorrect

Correct

Opener
Disks

Null4:

Figure 54

Opener-Gauge Wheel Contact

22531

Contact Within this Area

Null4:

Figure 55

Checking Wheel/Disc Contact

26129

1

2

3

4

1

Side Gauge Wheel Adjustment

Refer to Figure 53 and Figure 54

Disc-to-wheel angle and clearance ideally has the wheel
just touching the disk when the wheel is raised to
planting depth (is up against the stop set by the “T”
handle. The goal is to have both disks and wheels turn
freely, but keep soil and trash from getting between
them.

These two adjustments interact with each other.
Changing one requires at least checking the other.

In addition to changing the disk angle due to changing
depth or new field conditions, these two settings may
need attention over time as the disk and wheels wear
from normal use. This adjustment will also need to be made if any opener components are replaced.

For 5.1 cm planting depth, adjust side gauge wheel
angle so wheels contact row unit disks at the bottom of
wheel. Check with row units in soil so wheels are held
up.

At the same time, keep side gauge wheels close to
opener disks so openers do not plug with soil or trash.

 Wheels should be out far enough so disks and wheels

turn freely.

Refer to Figure 56 on page 52

To adjust side gauge wheels:

1. Raise the planter and install lift cylinder locks.

2. Loosen hex-head bolt . Move wheel and arm out
on O-ring bushing.

3. Loosen pivot bolt Turn hex adjuster so indicator
notch is at 5 o’clock to 7 o’clock.

 Use this as the starting point for adjustment.

4. Move wheel arm in so side gauge wheel contacts
row unit disk. Tighten hex-head bolt to clamp arm
around bushing and shank.

Refer to Figure 55

5. Check wheel-to-disk contact at 5.1 cm planting
depth. Lift wheel 5 cm, check contact and release.
When let go, wheel should fall freely.

• If wheel does not contact disk at bottom to area

where blade leaves contact with soil, move hex
adjuster until wheel is angled for proper contact with
disk.

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Starting Point

Figure 56

Disk/Gauge Wheel Adjustment

22524
22525

3

2

1

4

4

1

1

1

2

8

Null4:

Figure 57

Gauge Wheel Scraper

25273

5

6

7

568

6

8

757

5

• If wheel does not fall freely, loosen hex-head bolt

and slide wheel arm out just until wheel and arm
move freely. Retighten hex-head bolt according to

grade:

1

2in Grade 5 bolt, 102 N-m.

1

2in Grade 8 bolt, 149 N-m.

 Use “Torque Values Chart” on page 98 for

reference.

6. Keep turning hex adjuster and moving wheel arm
until the wheel is adjusted properly. When satisfied,
tighten pivot bolt to 149 N-m.

Null4:

Adjusting Gauge Wheel Scrapers (Option)

Refer to Figure 57

Scrapers are optional, and may be useful in moist or
sticky soils that tend to accumulate on gauge wheels and
reduce intended planting depth.

To adjust scrapers:

1. Loosen nut .

2. Slide scraper toward gauge wheel until scraper
touches tire.

3. Slide scraper away from wheel leaving a 3 mm
gap at .

4. Rotate scraper left and right around bolt, making
sure it cannot touch tire if bumped in field. If it can
touch tire, back scraper away from wheel until it
cannot.

5. Center scraper angle on bolt until gap is
constant.

6. Tighten nut .

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Null4:

Figure 58

Rain Cover Removal

29606

1

2

3

1

2

3

Null4:

Figure 59

Seed Inlet Shutter

29607

Setting Setting Typically Used For

Top (0) Closed: Row Shut-Off, Meter Re-Fill

| (1)

Small seeds, such as Milo, with little or no

treatments

|| (2)

Small treated seeds and edible beans

(such as Soybeans)

||| (3) Corn, round popcorn

|||| (4) Large corn, or heavily treated corn

Bottom (5) Wide Open: Clean-Out

0

5

|

II

III

||||

Seed Meter Setup and Adjustment

There are adjustments for seed inlet, and choice of
disks. There are no other adjustments, in particular no
brush adjustments, at the meter.

Meter Rain Cover

The rain cover keeps side winds from unseating seed in
disk pockets. It also keeps precipitation, sunlight and
field debris out of the meters.

Refer to Figure 58

To remove the rain cover, peel the flexible snap latches,
at top and rear , away from the meter housing. Pivot
the cover forward and down at tab in slot.

When removing a cover, inspect it for damage and
missing parts. If a cover does not have both latches, and
an intact edge seal under the latches, the cover is apt to
be lost during transport or field operations.

To replace a latch, temporarily remove the seal near the
latch. Slide the replacement latch onto the cover lugs
from the meter side, then snap the other end down over the lugs. Re-install the seal.

Seed Inlet Shutter Adjustment

Refer to Figure 59 (showing the shutter at setting 3)

The seed inlet shutter regulates the volume of bulk seed
presented to the seed disk. The operating settings vary
with crop, seed size and treatments. The shutter also
has settings for row shut-off (completely closed), and
clean-out (wide open).

The Seed Rate Charts include suggested initial shutter
settings. Refine these settings based on experience, and
on inspection of the slope of the seed pool at the bottom
of the seed disk.

The shutter is operated by a handle. Lift the handle away
from the meter plate. Move the handle to half a full
setting higher than the new setting, then back to the new
setting, and lower the pawl into that slot. The plate has
detents for full and half steps.

The table at right is a general summary of shutter
settings.

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YP625PD Table of Contents Index Adjustments 54

Null4:

Figure 60

Milo: Seed Inlet Shutter at: 1

29602

1

8:00

1

Null4:

Figure 61

Soybeans: Seed Inlet Shutter at: 2

29604

1

8:30

1

Null4:

Foreign Object Risk:

After clearing a bridge, or a delivery blockage upstream,
check the seed pool at the meter for any debris that might have
been the original cause. Remove such debris from the meter
before planting. Don’t run the risk of an object lodging in a
seed pocket and causing on-going skips.

Figure 62

Corn: Seed Inlet Shutter at: 3

29603

1

8:30

Optimal Seed Pool Slopes

The optimal seed slope is one that results in the most
consistent seeding, with minimal skips and doubles. The
column at right has photographs of pool slopes found to
be optimal for representative seeds.

If the suggested initial shutter settings do not seem to be
working for your seed, adjust the shutter to achieve
specific reserve slope targets.

Refer to Figure 60

For medium size and smaller seeds that flow easily, the
slope runs from just above the 8:00 (o’clock) position on
the housing wall, forward and down to one or two seeds

deep at the base of the rear strip brush .

Refer to Figure 61 and Figure 62

For medium size and larger, or heavily treated smaller
seeds that flow less easily, the slope runs from at or
slightly above the 8:30 (o’clock) position on the housing
wall, forward and down to 3-to-6 seeds deep at the base

of the rear strip brush .

In general, the seeds at the base of the strip brush need
to be deep enough that no air escapes there, and so that
just enough seeds are present to begin populating cells.

Keep the top left/rear end of the pool below the 9:00
o’clock position (meter horizontal center-line).

Meter Re-Fill

Once planting is underway with the seed pools set, it is
infrequently possible for bridging at or above the inlet to
starve the meter of seed.

An empty meter causes seed monitor “Row Failure”
alarm, with a report of the row number. Row numbers are
counted from the left wing (outside row is row 1).

Stop, and put the tractor in Park. Leave the fan running.
Locate the failed row, remove the rain cover, and verify
that the meter is empty. Note the shutter setting.
Temporarily open the shutter one of two notches wider. if
the problem was inlet bridging, seed should flow into the
meter immediately.

If inlet bridging is not the problem, little or no seed flows
into the meter with the shutter open wider. In this case,
the problem is further up in the seed flow, and may be
bridging where the seed hose joins the meter inlet (also
check the slide gate). Close the shutter completely for
about 15 seconds. This prevents meter pressurization air
from opposing seed delivery. Gently tap on the seed
inlet. Re-open the shutter and see if seed now fills the
meter.

If no obvious foreign object was the cause of the
bridging, the shutter setting may have been too small for
the seed. Verify that this and other operating rows were
at the correct initial shutter setting. If so, re-set the
shutters to the next higher opening.

Metadata: End of “

Seed Inlet Shutter Adjustment

”

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Null4:

Figure 63

Disk Removed From Meter

29608

2

1

1

2

Null4:

Figure 64

Disk on Clamp and Seat

29611

3

1

4

1

3

Null4:

Figure 65

Disk Clamped

29614

4

Air-Pro® Meter Disk Installation

1. Cross-check Seed Rate Chart data against part
number/description molded into disks to be used.

Population Risk:

Use the same disk in all active rows.

2. Inspect disks to be installed. Do not install damaged
or excessively worn disks. Either can cause irregular
seeding. Chips and cracks accelerate brush wear.

3. Remove meter rain cover (page 53).

Refer to Figure 63 (depicting an empty meter)

4. Inspect meter (see page 76 for details).

5. Make sure clamp is aligned with seat .

Refer to Figure 64

6. With the seed pocket side facing the meter housing,
place the new seed disk on the disk seat.

7. Rotate disk clamp clockwise 45 to clamp disk.
Clamp seats into detents in disk hub.

 On a new meter, or with new brushes installed, force

the disk into the brushes to allow the disk clamp to
rotate. This condition eases as the brush fibers are
trained during initial rotations.

 With slightly used brushes, when a disk is first

clamped, it is normal for the disk hub to be flat with the
face of the disk seat only on the inlet (rear) side. The
disk fully seats as it first turns. This condition eases as
the brush fibers receive further use.

Brush Mis-Seating Risk:

Rotate disks forward shortly after disk installation. If planting
is not anticipated within an hour or two of disk installation,
rotate the drive system a few turns to ensure that meter brushes
lean in the correct direction. Correct lean improves meter
performance and reduces air consumption. This step is
particularly important for new brushes.

Brush seating may be accomplished with or without seed
present. With the planter raised, rotate the ground drive
wheel, or rotate the meter drive shaft, top forward, with a
23 mm open-end wrench.

8. Reset seed inlet shutter to setting recommended
by Seed Rate Chart, or to your own developed value.

9. On the seed monitor console, select the new
Material, seed disk Cell Count, and target
population.

10. Re-install rain cover (page 53).

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Null4:

Figure 66

Remove Disk

29611

3

1

4

412

Null4:

Figure 67

Seed Inlet Shutter Closed

29609

2

1

Removing a Seed Disk

Refer to Figure 66

1. Remove rain cover. If seed is present, close
shutter to prevent more seed from entering meter.
Attach funnel (page 74) or place a tarp under the row
to collect seed.

2. Hold seed disk in meter. Rotate disk clamp
counterclockwise 45 to release disk.

3. Tilting top of disk toward meter, slowly remove disk,
allowing seed to collect in funnel or to control flow to
tarp. Open shutter to release remaining seed up to
wing tube.

4. Clean seed from all brushes. Clean disk seat ( in
Figure 63 page 55), so that new disks can seat fully.
Inspect brushes for excess wear and damage. See
“Meter Brush Maintenance” on page 76.

5. Inspect removed disks for excess wear and damage.
Set aside any disks requiring replacement. Clean
other removed disks and place in storage. See
“Seed Disk Maintenance” on page 78.

6. Re-install the rain cover (page 53).

Metadata: End of “

® Meter Disk Installation

Air-Pro

”

Row Unit Shut-Off

Skip-row operations, such as switching from 110 cm
triple-row to 110 cm single-row, requires shutting down
unused rows.

Shutting off seeding at a row involves 4 to 6 steps:

1. Identify the rows to shut off (page 57).

2. Fully close seed inlet shutter (page 57).

3. Replace seed disk with blank disk (page 57).

4. Lock up row unit to reduce wear (optional, page 57).

5. Reset marker extension (Option, page 110).

6. Reset monitor active row pattern and row spacing to
avoid nuisance alarms (see Monitor manual).

 Meter drive is not disabled on 25AP row units during

shut-off.

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Null4:

Null4:
Null4:

Irregular Seeding Risk:

Always use a blank disk in a shut-off row. Operating with no
disk, or with a seed disk but no seed, destabilizes the regulated
airflow, particularly at rows with pressure sensor lines.

Figure 68

Shutter Closed, Blank Disk Installed

29610

2

1

Null4:

Crushing and Sharp Object Hazards:

Do not attempt to lift a row unit by hand. The weight of the
unit, plus the force of the springs (even at minimum) is too
great (plus, a free hand is needed for pin insertion). Even with
multiple people lifting, hand-lifting is unsafe - there are
numerous sharp edges, and the row unit snaps down violently
if a grip is lost.

Figure 69

25AP Row Unit Lock-Up Pin

25269
31879

1

2

3

4

5

123

1. Identify Rows to Shut Off

On triple-row planters, openers are installed with two
short-mounts on the outside of each triplet, and the
long-mount opener in the center of each triplet. For
twin-row operation, shut off the left (short-mount) opener
of each triplet. For 55 cm operation, shut off the center
(long-mount) opener of each triplet.

If not locking up rows, any rows may be shut off.

2. Close Seed Shutter

Refer to Figure 67 on page 56

Lift the handle away from the plate. Move it to the top
position, and release the handle into the notch.

Closing the shutter prevents meter pressurization air
from leaking into the bulk seed air system, resulting in
lower pressures in adjacent rows, with risk of skips.

The shutter also stops seed flow from a row as soon as
the meter is empty. Bulk seed flow to the row falls to nil
as soon as the seed backs up to the air release vent at
the top of the meter.

3. Install Blank Disk

Refer to Figure 68

Clean out meter. See “Meter Clean-Out” on page 74.
Remove seed disk and install blank disk. See “Air-Pro

Meter Disk Installation

” on page 55.

Blank disks (part number 817-841C) are essential in row
shut-off, both to maintain consistent meter back-pressure
to meter pressurization and to prevent wear on seed
disks and minimize wear on brushes.

Blank disks are engineered to simulate a seed disk with
seed in all pockets. Blanks are particularly important on
the rows with sensor lines to the pressure chamber.

4. Lock-Up Row

Alternate twin-row units (the rear units) can be pinned in
the up position to accommodate single-row spacing.

Refer to Figure 69

The lock-up pins are located in a storage hole in
the row unit mount. To lock up a unit, the unit must be

raised, and the pin moved to the lock-up hole in the
row unit shank.

 Lock-up pins are optional. The part number is

805-435C. Order one pin for each row locked-up.

®

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Null4:

Certain Machine Damage:

Do not pin the row unit while it is in the lowered position.
If the pin is inserted below the parallel arm, unit damage
occurs as soon as planting begins.

Figure 70

25AP Row Unit Locked Up

29756

3

2

4

5

2

3

28420

1. Raise the planter. Although this adjustment can be
made with the planter lowered, the springs will be in
tension, and will require more effort. The extra force
may also damage tools.

2. Install lift assist cylinder locks. Lower parking stands.

3. Set the down pressure spring cam to zero, per the
instructions on page 49.

4. Raise the row unit high enough that the hole for the
pin is above the lower parallel arm. This can be done
in several ways, including:
a. use a hoist at the rear of the shank
b. use a jack under the shank extension

Crushing Hazard:

Use a jack or hoist. Raising a row unit on a block by lowering
the planter is risky. The potential for hydraulic failure creates
a safety hazard. Full lowering can damage components.

Refer to Figure 70 (which depicts a 4-spring 25 Series
opener)

5. Remove the pin from the storage hole and insert
and secure it in the lock-up hole .

6. Lower row unit until lock-up pin rests on lower
parallel arm.

Metadata: End of “

Sprocket Indexing (Stagger)

Null4.aac:

If you are planting:

Row Unit Shut-Off

”

• twin-row crops,

• at seed interval spacings above 16.5 cm,

you can synchronize each pair of adjacent meters in a
twin row so that you achieve the maximum seed-to-seed
spacing between the units of the pair.

Refer to the Seed and Fertilizer Rate manual (401-754B)
for instructions and charts.

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Null4:

Figure 71

Keeton

®

Seed Firmer

28316

1

1

Null4:

Figure 72

Seed-Lok

®

Lock-Up

29985

3

2

223

Seed Firmer Adjustments

Series 25 row units include a standard seed flap, and
accept one of two optional seed firmers (which may be
included in your selected opener bundle).

Row unit disk blades may be sharp. Use caution when making
adjustments in this area. To adjust the Keeton

®

seed firmer,
lower the planter until the disks of the row units are resting on
the ground.

Keeton

The optional Keeton

®

Seed Firmera Adjustment

®

seed firmer is an engineered
polymer shape that slides down the seed trench. It traps
seeds as they exit the seed tube and firms them into the
bottom of the “V”.

Refer to Figure 71

The firmer is provided with a preset tension which is
recommended for using the first year. The tension screw

can be tightened in subsequent years according to
your needs. Firmers should provide just enough tension
to push seeds to the bottom of the trench.

Null4:

Seed-Lok® Seed Firmer Lock-Up

Optional Seed-Lok

®

firming wheels provide additional
seed-to-soil contact. The wheels are spring loaded and
do not require adjusting. In some wet and sticky
conditions the wheels may accumulate soil. To avoid
problems associated with this, you can lock-up the
firmers.

Refer to Figure 72

To lock up a Seed-Lok

®

wheel:

1. Raise planter. Insert lift assist cylinder locks.

2. Push up on Seed-Lok

®

wheel until wheel arm

latches up.

®

To release a Seed-Lok

1. Lift up at Seed-Lok

wheel:

®

wheel to reduce force

required to release lever.

2. Flip lever up slightly until Seed-Lok

®

wheel

releases.

a. Keeton® is a registered trademark of Precision Planting, Inc.

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YP625PD Table of Contents Index Adjustments 60

Higher press wheel down pressures reduce the down
force on the main row unit shank components, such as
the openers. High press wheel settings may require an
increase in overall row unit down force. See page 48.

Null4:

Figure 73

Press Wheel Adjustments

25118

1

3

2

1

1

Null4:

Figure 74

Press Wheel Force & Stagger

22907

1

8

7

6

5

3

4

2

456

878

2

Press Wheel Adjustment

The press wheels close the furrow which gently presses
the soil over the seed to ensure good seed-to-soil
contact for even emergence.

To provide consistent seed firming, the press wheels are
free to move downward from their normal operating
position. This system maintains closing/pressing action
even if the row unit arm is lifted when the disks
encounter obstructions.

There are three adjustments available on the press
wheel assembly:

Refer to Figure 73

1. Down pressure (shown at maximum)

2. Wheel stagger (shown staggered)

3. Centering (see Figure 75 on page 61)

Press Wheel Down Pressure

Handle sets down pressure, which may need
adjustment for different soil types and field conditions.

• Relax the handle forward (in the direction of travel)

for decreased down pressure.

• Pull the handle back for increased down pressure.

 Higher press wheel down pressures reduce the down

force on the main row unit shank components, such
as the openers. High press wheel settings may
require an increase in overall row unit down force.
See page 48.

Press Wheel Stagger

The factory stagger setting has been found optimal for
residue flow. If your conditions appear to require even
press wheels, you might try one row before
re-configuring the entire planter. To change the stagger:

Refer to Figure 74

1. Raise the planter and install the transport locks. See

“Lift Cylinder Locks” on page 19.

2. Remove the bolt , nut and lock-washer for the

left press wheel .

3. Move the spacer and wheel to the forward of

the two mounting holes at .

4. Re-install the bolt, lock washer and nut. Tighten.

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Null4:

Figure 75

Press Wheel Centering

(View from beneath opener)

25277

3

2

1

4

1234323

Press Wheel Centering

If one press wheel is running in the seed trench, or the
wheels are not centered over the trench, the angle of

the press wheel assembly can be adjusted as follows:

Refer to Figure 75

1. Determine how far, and in which direction, the press

wheel assembly needs to move to center the wheels.

2. Raise planter and install lift assist cylinder locks. See

“Lift Cylinder Locks” on page 19.

3. Loosen the

1

2in hex-head bolts and .

 Do not loosen the square-head bolts forward of the

hex-head bolts.

4. Turn the hex head cam under the forward hex

head jam bolt , and move the required amount.

5. Tighten both hex head bolts and .

If press wheel adjustments do not provide satisfactory
furrow closing, your conditions may require alternate
press wheels. A variety of wheel assemblies are
available. Consult your Great Plains dealer.

MetaData: End of “

Adjustments

”

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YP625PD Table of Contents Index Troubleshooting 62

Suggested Furrow Check:

Plant a short distance and dig seeds, or run with the
closing wheels wired up to leave an open seed trench.

Based on seeds found, determine an average distance
between seeds. Compare the distance between seeds
to the seed spacing listed in the charts for your
population. This is listed as “inches per seed”.

Troubleshooting

Planting Rate Problems

When starting up with a new planter, a new crop or a
new population it is important to physically double check
what the monitor is reporting in the cab by digging seeds.
This is to verify that you are set up correctly to plant the
desired population. Do not rely solely on the population
reported by the seed monitor.

Also during start up it is common to encounter alarms
and readouts on the seed monitor that don’t seem to
make sense. It is critical to troubleshoot these alarms not
only to make sure the planter drive is set properly to hit
the target population, but also to fix incorrect entries in
the monitor setup to eliminate nuisance alarms.

Before entering the troubleshooting charts to remedy a
monitor or population problem, it is helpful to use the
following flowchart to get a handle on what may be
wrong. The basis for finding what is wrong comes from
knowing exactly what the planter is actually doing in the
soil. Always dig or observe seed on the ground when
checking populations.

1. Is the spacing on the
ground correct?

2. Is the population reported
by the optional seed

1

monitor

3 the actual or is

the reported population too
high by a factor of 3?

No:

Yes: Go to step 2.

No:

Yes:

Check the ground drive transmission and range sprocket selections, or the
population settings on a hydraulic drive unit. See also “Population Too Low” or
“Population Too High” in the troubleshooting charts.

Go to step 3.

An incorrect row spacing value entered in the seed monitor can cause
this.
Example:
18 rows at 110 cm “Row Spacing” (incorrect 1980 cm effective swath),

instead of:
18 Rows at a swath of 660 cm (correct 36.7 cm effective row spacing).
Correct the row spacing error on the seed monitor console.

The system can also be off by a large factor if incorrect range sprockets
are installed. Check seed rate charts against range and transmission
sprockets on the planter.

3. Is the population reported
by the optional seed
monitor close to the target
population?

Metadata: End of “Planting Rate Problems“

No:

Yes:

Check seed rate charts against transmission sprockets selected. See
“Population Too Low” or “Population Too High” in the troubleshooting charts.

If slightly under, see “Population Too Low” if slightly over, see “Population
Too High”.

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Null4:

Null4:
Null4:

Figure 76

Rear Cross-Section of Air-Pro

®

Meter in Normal and Row-Failed Conditions

29986

Normal: Filled Bridging: Inlet Shutter Bridging: Seed Hose Empty Hopper

Inlet is filled to seed box. Seed
move slowly down as
singulated by meter.

A bridge at the shutter is
blocking flow.
Causes may include:

• oversize seed

• shutter setting too low

• oversize matter in seed

• excessive or sticky seed

treatment

Oversize matter in seed has
caused a bridge at the top of
the inlet.
Causes may include:

• oversize seed

• oversize matter in seed

• excessive or sticky seed

treatment

No seed arriving from box.
Causes may include:

• seed run-out

• slide gate closed

If hopper is empty, air
back-flow is also occurring,
which can reduce meter
pressurization at other rows

Actions: Actions: Actions: Actions:

No action required.

Continue Planting.

1. If shutter was at
suggested opening,
increase one notch.

2. Check seed pool for
foreign matter.

3. Resume planting.

1. Close shutter.

2. Tap on hose/tube
junction.

3. Check seed pool for
foreign matter.

4. Resume planting.

1. If row is active,
add seed or check slide
gate.

2. If row is inactive,
close shutter.

3. Resume planting.

1

1

Seed Pool Troubleshooting

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YP625PD Table of Contents Index Troubleshooting 64

1

Null4:

Figure 77

Magnehelic

®

Gauge

29842

Port ID for Troubleshooting:

Over-pressure relief port (with plug in place)
Low-pressure port (breather/atmospheric pressure)
High-pressure port (from manifold chamber)

Alternate high/low ports are plugged.

Winter testing/maintenance advisory:
Gauge readings may be inaccurate or sluggish below -7C

2

3

4

3

2

4

1

Magnehelic® Gauge Troubleshooting

If the Magnehelic® gauge does not read zero with the fan
off, inspect the gauge, and re-zero as needed.

Problem Cause Solution

Non-zero
with fan off

Gauge
reading
lower than
sensor

Zero drift

Relief port plug
missing/damaged

Breather line
blocked or kinked

Leak in sensing line Check line to chamber

Gauge damaged

Check for chamber and breather line problems before
re-zero. Re-zero cannot accurately compensate for leaks
and blockages.

Re-zero the Magnehelic

®

gauge on level ground with the
fan off, and if possible, under no-wind conditions. Turn
the set screw on the meter face until it reads zero from
the tractor driver’s viewing position.

Re-zero per
instructions below

Replace plug

Clear breather line

Check for loose cover,
damaged O-ring

Metadata: End of “Seed Pool Troubleshooting“

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YP625PD Table of Contents Index Troubleshooting 65

Population Troubleshooting Charts

Population Too Low

Problem Cause Solution

Overall Low
Population

Incorrect seed rate

Using Seed Rate Manual, check:

• seed disk selection,

• Range/Transmission sprocket setup, and

• tire size and inflation.

Empty pockets on disk (skips) due to insufficient
air pressure.

Empty pockets on disk (skips) due to sticky seed
treatments not allowing seed to rapidly fill the
pockets.

Empty pockets on disk (skips) due to rough field
conditions causing seeds to fall from the disks.

Empty pockets on disk (skips) due to seed pool
too low, and seeds are not filling every pocket on
the disk.

Empty pockets on disk (skips) due to disk speed
too high, and pockets are not filling.

Empty pockets on disk (skips) due to singulation
(4 tufted) brush too aggressive.

Empty pockets on disk (skips) due to seed too big
for pocket.

Seeds are not falling from disk, and get carried
past drop zone. Static electricity can cause small,
lightweight seeds to cling to the pocket and not
fall out.

Air pressure too low, as confirmed by gauge. Increase fan speed or reduce butterfly valve setting.

Methodically increase the meter pressurization.
See “Fan and Adjustment” on page 40.

Increase seed lubricant.

Decrease field speed or increase the air pressure in the
meter.

Open shutter one notch.

Decrease field speed or change to a higher cell count disc.

Check for matted, stuck together fibers. Wash, scrape clean,
or replace as needed.

Select the correct disk for the seed size.

The graphite component of Ezee Glide Plus addresses this
issue. Increase the amount of Easy Glide Plus and/or more
thoroughly mix the lubricant into the seed.

Overall Low
Population,
cont.

• Inspect the 6.4 cm sample lines from the row units

up to the sensor chamber for leaks (page 64).

Air pressure too low, but gauge reading is within
range or reading high.

• Make sure all non-planting rows have blank disks

and shutters are closed (page 57).

• Re-zero the gauge with the fan off (page 64).

• Check gauge vent line for kinks, pinches or

plugging (page 64).

Excess field speed

Incorrect speed sensor constant. Perform speed calibration per seed monitor manual.

Incorrect magnetic speed sensor gap. Check and adjust (page 78).

(Option) Incorrect radar speed sensor angle.

Pass gaps too large

Actual field size is different Population may be correct, and calculations are not.

Seed monitor reporting excess area

Plant within speed ranges recommended in Seed Rate
Manual.

With planter lowered, check radar speed sensor angle per
DICKEY-john

Check marker extension (page 110).
For GPS, check planter size programmed.

Readings can vary with conditions (wheel slippage, and
effective rolling radius in soft soils) and planting patterns.

®

recommendations.

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YP625PD Table of Contents Index Troubleshooting 66

Population Too Low

Problem Cause Solution

Low
Population,
Single Row

Shutter opening too narrow - starving meter of
seed (low seed pool)

Meter starvation due to bridging at shutter

Meter starvation due to blockage above inlet Clear blockage (page 54).

Meter starvation due to bridging above inlet,
caused by high levels of seed treatment

Incorrect seed disk on one row Install correct seed disk.

Chain skipping at row unit. Check chain, idler and sprocket condition.

Skips due to low meter pressurization at one or
several rows

Skips due to skipping chain

Skips due to debris in disk pockets Remove rain covers. Inspect and clean out disks.

Row has blank disk installed Replace with seeding disk.

Seed tube plugged Raise planter, expose bottom of seed tube and clean out.

Adjust shutter to higher setting.

Re-adjust for shutter bridging (page 54).
If seed is treated, increase seed lubricant.

Clear bridge (page 54). Increase seed lubricant.

Check shutter setting. Check for excess wear on seed drop
brush. Check for loose or leaking pressure hose.

Check for worn chain, worn idlers, low chain slack (page 82)
and failed meter bearing.

Low or
Erratic Seed
Flow

Metadata: End of “Population Too Low“
Null4.aac:

Seed meter plugged, due to operation with fan
shut off, or manifold pressure too low.

Close shutters. Clean-out meters. Set fan for correct
manifold pressure. Resume planting.

Population Too High

Problem Cause Solution

Overall High
Population

Incorrect seed rate Check seed rate charts

Two seeds per pocket on the disk (doubles),
due to excess meter pressurization

Two seeds per pocket on the disk (doubles),
due to pockets too large for the seed

The meter pressurization is too high, as
confirmed by gauge

Air meter pressure too high due to pressure
sensor not zeroed properly.

Methodically decrease the meter pressurization.
See “Fan and Adjustment” on page 40.

Select a disk with smaller pockets.

Reduce fan speed or increase butterfly valve setting.

Re-zero the gauge with the fan off.

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YP625PD Table of Contents Index Troubleshooting 67

Population Too High

Problem Cause Solution

Overall High
Population,
cont.

Air pressure too high, but gauge is within
range or reading low.

Check:

• Inspect the 6.4 cm sample lines from the row units

up to the sensor chamber for leaks (page 64).

• Make sure all non-planting rows have blank disks

(page 57).

• Check that rubber pressure relief plug is seated in

gauge (page 64).

False alarms or actual seed rate errors due to
monitor setup with incorrect row count,
spacing or active rows

Incorrect cell count

Incorrect speed sensor constant. Perform speed calibration per seed monitor manual.

Incorrect magnetic speed sensor gap. Check and adjust (page 78).

(Option) Incorrect radar speed sensor angle.

Doubles due to incorrect disk for crop or seed
size

Sticky seeds: excess seed treatment Increase seed lubricant.

Incorrect speed sensor constant

Overlapping passes

Actual field size is different Population may be correct, and calculations are not.

Seed monitor under-reporting area

High
Population,
Single Row

Metadata: End of “Population Too High“

Excess meter pressurization causing doubles Check shutter.

Worn seed-drop brush and/or strip brushes
allowing excess seed to pass

Worn meter bearing causing seed disk
wobble and doubles

Incorrect seed disk with higher cell count. Install correct disk.

When troubleshooting population issues, always first rule out
seed monitor setup. Review planter configuration and monitor
setup.

Replace seed disks with correct disks, or reset rate for current
disks (if within range).

With planter lowered, check radar speed sensor angle per
DICKEY-john

Use recommended disk for crop and seed size.

Perform speed calibration per DICKEY-john® monitor manual.

Check marker extension (page 110).
For GPS, check planter size programmed.

Readings can vary with conditions (wheel slippage, and
effective rolling radius in soft soils) and planting patterns.

Replace worn brushes.

Replace meter bearing.

®

recommendations.

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YP625PD Table of Contents Index Troubleshooting 68

Null4.aac:

Population Related

Problem Cause Solution

Overall
Population
Alarms

Mismatch
Between
Reported and
Furrow
Population

Excessive Seed
Cracking

Skips and Bare
Spots After
Turn s

False alarms or actual rate errors due
to monitor setup with incorrect [active]
row count or spacing

Incorrect cell count

Improper gap on magnetic speed
sensor.

Incorrect speed sensor constant Perform speed calibration per monitor manual.

(Option) Incorrect radar speed sensor
angle.

Seed run-out. Due to unequal outlets
per box division, and if planting
across slopes, some rows will run out
before others.

Small seeds (example milo) are not
reliably sensed in the seed tube

Seed tube sensor is not counting all
seeds

Incorrect seed pocket size Use correct disk for seed.

Damaged, old or dried-out seed Use new seed.

Unclean seed Use clean seed.

Fan was turned off at turns

Insufficient hydraulic flow to keep fan
running at speed required to maintain
meter pressurization

When troubleshooting population issues, always first rule out seed
monitor setup. Review planter configuration and monitor setup.

Replace seed disks with correct disks, or reset rate for current disks
(if within range).

Check speed sensor on planter for a gap to toothed wheel of:

0.5-1.0mm. Improper gap can cause erratic speed signal causing
monitor to falsely report improper planting rate.

With planter lowered, check radar speed sensor angle per
DICKEY-john

Re-distribute seed to favor rows that have run out, and plan to re-fill
shortly.

Run with rain covers in place to minimize ambient light intrusion. Use
the Population Adjust factor in the seed monitor system to
compensate for missed seeds. Remember to set this back to 100%
for large seeds.

Clean the seed tube of graphite and dust buildup with long narrow
seed tube brush. Replace sensors that malfunction.

Leave fan running; meter pressurization must be maintained during
turns, or seed will fall out of disk pockets.

Check tractor capability against requirements (page 96).
If sufficient:

®

recommendations.

• Fold markers before engaging lift.

• Use a less aggressive lift rate.

• Monitor meter pressurization during end-of-pass

operations.

Seed too
shallow or
scattered on
ground from a
single row

Bottom of seed tube damaged.

Row not penetrating in tire tracks. Increase down force on parallel arm springs.

Opener depth too shallow. Change side depth wheel setting.

Replace seed tube. Avoid setting planter straight down. Use forward
motion when lowering.

Twin Rows
were timed but
became out of
time.

Metadata: End of “Population Related“
Metadata: End of “Population Troubleshooting Charts“

06/12/2019 Table of Contents Index 401-754M

Timing will change when a population
change has been made.

Chain has jumped. Check sprockets and chain for excessive wear or rusty stuck links.

Re-time meters from the population based timing chart.

YP625PD Table of Contents Index Troubleshooting 69

Null4.aac:

General Troubleshooting

Problem Cause Solution

Population
Alarms

Excess Seed
Remaining

Seed

Consumption

Too H i gh

Rows Not
Planted

Uneven seed
spacing

Uneven seed
depth

See “Population Troubleshooting Charts” on page 65.

See “Population Troubleshooting Charts” on page 65.

Field size different. After ruling out population problems, re-check geography.

Excessive gaps between planter passes. Adjust marker, page 110.

See “Population Troubleshooting Charts” on page 65.

Field size different. After ruling out population problems, re-check geography.

Excessive overlap.
Irregular shaped field.

If not detected by optional seed monitor,
check for plugged row-unit seed tube

See “Population Troubleshooting Charts” on page 65.

Excessive field speed. Reduce field speed.

Unclean seed. Use clean seed.

Damaged seed tube Inspect; repair or replace.

Seed-Lok® plugging. Lock up Seed-Lok®, page 59.

Row-unit discs not turning.

Worn/rusted sprockets and/or chain idler
or bearings.

Partially plugged row-unit seed tube. Lift up planter, expose bottom of seed tube and clean out.

Lack of proper seed lubrication on seed. See “Seed Lubricants” on page 90.

Excessive field speed. Reduce field speed.

Planting conditions too wet. Wait until drier weather.

Incorrect coulter depth setting. See coulter manual or set unit mounted coulter.

Excessive or improper row unit down
pressure spring setting.

Damaged seed tubes. Check seed tubes for damage.

Seed-Lok® building up with dirt. Lock up Seed-Lok®, page 59.

Row-unit not penetrating low spots. Adjust row-unit, see instructions beginning on page 48.

Rough planting conditions. Rework the field.

Seed firmer not in place and set to
correct tension.

Adjust marker, page 110.

Lift planter, expose bottom of seed tube and clean out.

See “Row-unit discs not turning freely” in this Troubleshooting
chart.

Check and replace any worn/rusted sprockets or chain idlers.

See “Row Unit Down Pressure” on page 48.

See “Seed Firmer Adjustments” on page 59.

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YP625PD Table of Contents Index Troubleshooting 70

General Troubleshooting

Problem Cause Solution

Press wheel
or row-units
plugging

Row-unit
discs not
turning freely

Press wheels
not
compacting
the soil as
desired.

Hydraulic
marker
functioning
improperly, or
not at all

Planting conditions too wet. Wait until drier weather.

Too much pressure on row-units. Reduce down pressure on row-units.

Coulters set too deep, bring up excess
dirt and moisture.

Planter not set to run level from front to
rear.

Backed up with planter in the ground. Clean out and check for damage.

Failed disc bearings. Replace disc bearings.

Disc blades worn. Replace disc blades.

Scraper worn or damaged. Side depth
wheels not set correctly.

Row-unit plugged with dirt. Clean row-unit.

Planting conditions too wet. Wait until drier weather.

Incorrect side depth wheel adjustment See “Side Gauge Wheel Adjustment” on page 51.

Seed-Lok® is plugging row-unit. Lock up Seed-Lok®, page 59.

Failed disc bearings. Replace disc bearings.

Bent or twisted row-unit frame. Replace row-unit frame.

Partially plugged row-unit seed tube. Lift up planter, expose bottom of seed tube and clean out.

Incorrect spring handle setting See “Press Wheel Adjustment” on page 60.

Insufficient row unit down-force See “Row Unit Down Pressure” on page 48.

Use of incorrectly shaped tire for your
conditions.

Not level front to rear. Check tongue height and top link adjustment.

Wheel stagger needs adjustment for
conditions

Too wet or cloddy Wait until drier weather or rework ground.

Marker/Fold switch set to Fold.

Marker/Aux valve set to Aux

Air or oil leaks in hose fittings or
connections.

Low tractor hydraulic oil level. Check tractor hydraulic oil level.

Loose or missing bolts or fasteners. Check all bolts and fasteners.

Needle valve(s) plugged.

Check coulter adjustment.

Check tool bar height page 16

Adjust side depth wheels page.

Wedge shaped wheels work best on narrow spacings and in wet
conditions. Round edge wheels work best in wider row spacings
and drier conditions.

See “Press Wheel Adjustment” on page 60.

CFM Switch must be set to “Marker”. Set tractor remote circuit to
Neutral or Float before operating switch.

On a planter with optional Auxiliary Hydraulics, selector valve must
be set to Marker for markers to function. Set tractor remote circuit to
Neutral or Float before changing valve.

Check all hose fittings and connections for air or oil leaks.

Open needle valves, cycle markers slowly and reset needle valves,
refer to page 110.

Marker disk
does not

Disk angle too straight for soil conditions Reverse marker disk to pull or throw dirt.

mark

Speed
Reading
Doesn’t
Match Tractor

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Monitor speed reading, using optional
radar, will only match tractor with planter
lowered.
(Speed reading with magnetic pickup
falls to zero when lifted.)

If speeds don’t agree during planting (with planter lowered),
re-calibrate radar speed sensor with planter lowered.

YP625PD Table of Contents Index Troubleshooting 71

Null4.aac:

Dry Fertilizer Troubleshooting

Problem Cause Solution

No Fertilizer
Flow, All Rows

No Fertilizer
Flow, Some
Rows

No Fertilizer
Flow, One Row

Low Flow

High Flow

Fertilizer on
Surface

MetaData: End of “

Troubleshooting

Hopper empty Check / refill hopper.

Chain missing at one or more drive
stages

Hopper plugged

Check all five chains from ground drive to hoppers. See “Dry
Fertilizer Chains” on page 105.

Clean out any material clogging discharge port. See “Dry Fertilizer
Clean-Out” on page 75.

Shaft disconnected Check couplers along final drive shaft.

Applicator tube plugged with soil

Disconnect hose at top of applicator tube. Remove blockage from
below. Raise release height (page 44).

Disconnect hose at top of applicator tube. Remove blockage from

Applicator tube plugged with fertilizer.

below. Use finer grained fertilizer, or dry out the fertilizer if
coagulation is the problem.

Incorrect Transmission sprockets

Field speed too high for Transmission
sprockets selected

Ground drive wheel slipping

Re-check Seed and Fertilizer Rate manual (401-754B). Exchange
DRIVING and DRIVEN sprockets as needed.

Apply at a lower speed, or use a new sprocket pair for the actual
rate and speed. Metering (kg per revolution) is lower at high
speeds.

Check lowered tool bar height (page 16). Operate at a lower field
speed. Field conditions may be too wet for reliable meter drive.

Meter flutes worn Inspect meter flutes (page 24). Replace as needed.

Incorrect Transmission sprockets

Field speed too low for Transmission
sprockets selected

Re-check Seed and Fertilizer Rate manual (401-754B). Exchange
DRIVING and DRIVEN sprockets as needed.

Apply at a higher speed, or use a new sprocket pair for the actual
rate and speed. Metering (kg per revolution) is higher at low
speeds.

Release height too high Lower release height (page 44).

Coulter depth too shallow Increase coulter depth (page 43).

”

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Possible Dust and Chemical Residue and Fume Hazards:

Wear a respirator, and any other protective equipment
specified by the seed supplier, seed treatment supplier and/or
fertilizer supplier. Expect chemical residue, dust and fumes
during clean-out.

Maintenance and Lubrication

Maintenance

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:

Always have transport locks in place when working on
implement. You may be severely injured or killed by being
crushed under a falling implement.

High Pressure Fluid Hazard:

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. Escaping fluid under
pressure can have sufficient pressure to penetrate the skin. If
an accident occurs, seek immediate medical assistance from a
physician familiar with this type of injury.

1. After using your planter for several hours, check all

bolts to be sure they are tight.

2. Remove excess slack from chains. Clean and use

chain lube on all roller chains as needed.

3. Maintain proper air pressure in planter tires.

4. Keep disk scrapers properly adjusted.

5. Clean planter on a regular basis. Regular and

thorough cleaning will lengthen equipment life and
reduce maintenance and repair.

6. Lubricate areas listed under “Lubrication” on

page 85.

7. Replace any worn, damaged, or illegible safety

labels by obtaining new labels from your Great
Plains dealer.

Material Clean-Out

When planting is completed, it is commonly the case that
some seed remains, and fertilizer, if the fertilizer system
is present and was used.

The seed clean-out topic begins on this page.

Fertilizer clean-out begins on page 75.

Seed Clean-Out

There may be seed in the hoppers, hose lines, and
meters.

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Null4:

Figure 78

Convert Container to Funnel

29988

1

4

2

3

12342

3

Refer to Figure 78

a

The planter includes an 817-811C
clean-out, stored in a spring-loaded holder at the right
rear of the air manifold. The container can hold all the
seed in the meter and inlet (up to a closed slide gate).

The container can be converted into a true funnel for
complete system clean-out.

 The hoppers are connected to the rows with clamped

hose, and are not intended to be routinely unlatched
and tipped for clean-out.

Funnel Conversion

Materials and tools needed:

• a length of 3.49 cm (1

container for meter

3

/8 in.) I.D. hose

• a worm drive clamp with a working diameter of

approximately 3.4 cm to 5.7 cm

• a hacksaw

Trim the sump from the funnel. Slide the hose fully
onto the funnel tip. Secure with clamp (do not
over-tighten clamp, the funnel wall could be crushed).

The choice of complete system clean-out process
depends on whether you are using the 817-811C as a
container or funnel.

Seed Clean-Out (Container)

1. Scoop or vacuum as much seed as possible from the

top of the hoppers.

2. Perform a meter clean-out per page 74.

Seed Clean-Out (Funnel)

1. Close slide gate at hopper.

2. Attach funnel as for meter clean-out (page 74), with

hose routed to bucket or other larger container.

3. Use slide gate to control seed flow until meter, inlet

and hopper are empty.

b

with fine-toothed blade

a. The funnel does not fit rows that are to the left of gauge wheels on twin-row planters. Use vacuum or tarp on those rows.
b. The funnel wall is thin ABS. Scissor-type pipe-cutting tools may fracture it. Rotary-type pipe cutting tools may slip off.

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Null4:

Figure 79

Brush Inspection

29608

5

6

7

1

Null4:

Figure 80

Funnel Positioned and Engaged

29612

1

2

3

4

3

4

Meter Clean-Out

Refer to Figure 80

The 817-811C seed collection accessory (funnel ) may
be attached to the housing of the seed meter, freeing
your hands for other tasks during clean-out.

 The funnel does not fit rows to the left of gauge

wheels on twin-row planters. Use vacuum or tarp
collection on those rows.

 It may be necessary to raise a twin-row planter to

obtain clearance for the funnel. Use transport locks
(page 19) if the planter is raised.

1. Close the seed inlet shutter on the meter (page 53).

This minimizes the seed volume at disk removal.

2. Remove the rain cover (page 53). The funnel cannot

be snapped in place with the cover installed.

3. Align the left (rear) end of the funnel lip with the

top of the lower (rear) cover latch ear. Place the right
(front) end of the funnel lip between the meter
housing and the seed tube.

4. Rotate the funnel forward until the slot at lip center

engages a tab on the bottom center of the meter
housing.

5. Remove the seed (page 56).

6. Slowly open the seed shutter (page 53) to empty the

seed up to the slide gate.

7. If seed remains in the hopper, use the slide gate to

control the volume of flow.

Refer to Figure 79

8. Clean seed from all brushes (shop vac

recommended).

9. Inspect brushes (page 76).

10. Rotate funnel clockwise, remove and empty.

11. For imminent operations:

Install next seed wheel or blank disk (page 57) for
operations. Set inlet shutter for next seed (page 53).

12. For storage:

Close seed inlet shutter. Leave disk out.
Close Y-tube (if any).

13. Re-install rain cover (page 53).

At end-of-season clean-out, inspect a few seed meter air
release screens. If they require cleaning, consider
cleaning all rows.

Alternate Meter Clean-Out

To use a shop vacuum cleaner, with narrow hose nozzle,
to clean out a meter:

• Tip the top of the disk away from the meter.

• Insert hose nozzle and remove seed.

• Open shutter to allow seeds in inlet and drop hose to

flow to vac nozzle.

Null4:

• Close the seed shutter.

• Release the meter clamp, hold the disk against the

meter.

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Null4:

Figure 81

Hopper Drive Coupler

31897

Heavy Material Flow Hazard:

Use two or more people for hopper tilt clean-out. Do not stand
directly in front of the hopper being unloaded. Wear protective
equipment, including dust masks or other respiratory support.
Full hoppers are heavy, may tip rapidly, and may be hard to
control. They may empty suddenly.

1

2

Null4:

Figure 82

Hopper Cradle Pins

31898

3

4

Null4:

Figure 83

Hopper Tilted for Clean-Out

31899

123

4

Dry Fertilizer Clean-Out

Possible Agricultural Chemical Hazard:

Wear all protective equipment specified for use with the most
recent types of dry fertilizer used in the hoppers. Clean-out
operations are likely to result in airborne dust, which could be
contaminated with hazardous chemicals.

For small amounts of residual fertilizer:

1. Raise the planter.

2. If any seed remains in the seed hoppers, clean them

out first, or disconnect the seed meter Range or
Transmission chain.

3. Place a tarp, or multiple collection containers, under

the applicator tubes.

4. Operate the ground drive wheel (top forward) until

the hoppers are empty.

5. For extended storage, use a hose and clean water to

wash out the hoppers, meters, hoses and applicator
tubes.

For large amounts of remaining fertilizer, or any amount
that is not flowing properly through the meters, use this
alternate procedure:

1. Raise the planter.

2. Place a tarp, or large collection containers, under the

front of the planter.

Equipment Damage Risks:

Fully uncouple and empty one, and only one hopper at a time.
Attempting to empty multiple hoppers with shafts still coupled
is likely to result in machine damage. If two or more hoppers
are uncoupled at the same time, the interconnecting drive shaft
is completely free and may fall.

Refer to Figure 81

3. At each end of the hopper, remove the pin at the

shaft coupler . Slide coupler onto adjacent shaft.

Refer to Figure 82

4. At the rear of each hopper, remove two cotter and

two cradle pins .

Refer to Figure 83

5. Open the hopper lid (see page 24).

6. With one person at each end of the hopper, carefully

tilt it forward to empty it.

7. Operate the hopper drive shaft to clear the meter.

8. Tilt the hopper upright. Secure at rear with pins.

9. Rotate drive shaft to align hole with coupler pins.

Slide couplers into engagement. Re-install pins.

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Null4:

Figure 84

Brushes

29608

5

6

7

567

Meter Brush Maintenance

Possible Chemical Hazard:

Wear a respirator for brush cleaning. Brushes will have talc
and graphite residue, and may have residues of hazardous
seed treatments.

Refer to Figure 84

A HEPA
cleaning. Washing brushes is not recommended and
may cause matting. Do not scrape them with sharp
instruments.

The first indications of excess brush or damage wear are
normally observed on the seed monitor or in air system
operation.

a

vacuum cleaner is recommended for brush

• If the tufted brushes are worn/damaged, the seed

“double” rate rises, increasing population.

Finding an occasional cracked seed “hung up” on a
tuft fiber is not uncommon, and is not an indicator
that brush maintenance is required. Merely remove
the seed.

• If the strip brushes are worn/damaged, air

pressure regulation may become unstable, or
require increasing fan speed over time.

If you find you need to exceed recommended fan
rpm ranges, the regulated air system may be taking
too much air due to meter leakage.

In severe cases, seed may leak past the strip
brushes, causing spikes in population. If you
frequently observe seed in between the strip
brushes, one or both may need replacement.

• If the seed drop brush is worn/damaged, its

anti-static effect may fade, which can result in “skips”
due to smaller seeds failing to release, and lower
populations.

If an obvious groove is worn in the drop brush,
replace it.

a. HEPA: high efficiency particulate air

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13

14

16

11

13

17

19

12 15

Null4:

Figure 85

Brush Replacement

29719

21

20

11

121513

14

Null4:

Figure 86

Strip Brush Notches

29720

18

18

16

171819

202013

Meter Brush Replacement

Consult the Parts manual (401-754P) for current
replacement part numbers.

Refer to Figure 85

Tufted Brush Replacement

1. Remove and save both 10-24 hex head cap

screws and nylock nuts (not shown).

2. Remove the tufted brush assembly , and replace

with new assembly.

3. Re-insert the 10-24 screws, and re-start the nylock

nuts. Carefully tighten each nut just until plate has no
play under the screw heads.

4. Add a half turn to the nuts. Do not tighten fasteners

to normal 10-24 torque, or the plate may fracture.

Strip Brush Replacement

 Do not loosen or remove any of the three

screws retaining the brush holder.

1. Insert the flat blade of a large screwdriver into the

slots of the brush holder snaps . Turn each snap
clockwise to release brush holder .

2. Prepare to catch the drop brush (which will fall

lose). Slide brush holder left and up to free front
edge from under washer . Remove brush holder.

3. Remove used strip brushes from the holder by

sliding them downward out of the grooves.

Refer to Figure 86

4. Insert replacement strip brushes into grooves at

holder bottom so that notched ends are at the
bottom.

Refer to Figure 85

5. Check strip brush positioning with a trial re-insertion

of the brush holder. The ends of the long brush must
fit snugly into meter housing grooves at top and
lower rear . The bottom end of the short brush
must fit snugly in the lower front housing groove .
If any significant force is require to re-seat the brush
holder, a strip brush is likely too high or too low.

6. Relax the position of the brush holder, re-position the

drop brush (see below), and re-seat the brush
holder.

7. Starting with the bottom snap, swing snaps back

into engagement.

5

16-18 cap

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Null4:

Possible Chemical Hazard:

Wear gloves when washing disks. Avoid spray. Do not wash
disks where food is prepared, or where cookware or
dinnerware is washed. Seed disks will have talc and graphite
residue, and may have residues of hazardous seed treatments.
Although the disks are dishwasher-safe, do not wash them in
an appliance also used for food preparation or food serving
items.

Figure 87

Disk Seed Cells and Wiper

29613

1

2

1

4

5

3

1

2

314

5

Null4:

Figure 88

Speed Sensor Gap

31008

8

7

9

6

6

7

8

9

Seed Disk Maintenance

Refer to Figure 87

When removing seed disks, inspect them for wear and
damage. If there is any seed dust or treatment build-up in

the cell pockets , or along the raised wiper ridges ,
clean the disks and re-inspect.

Replace disks for conditions including:

• Chips at circumference . These will leak air.

• Chips at edges or in sculpted surfaces of cell

pockets . These can leak air and/or adversely
affect singulation.

• Cracks over 5 cm long in the working face of the

disk, or any cracks in support webs or to an edge.

• Warping - if any part of the disk does not press firmly

on the seed drop brushes (page 55) in operation,
replace the disk.

• Wear - if a wiper ridge is worn away, replace the

disk. If the seed pockets are worn through, or the air
ports have enlarged, replace the disk.

Cleaning and Storing Seed Disks

Use warm or hot water, mild soap, and a sponge or soft
brush to remove build-up.

If disks are washed, allow them to dry completely prior to
storage.

Retain original shipping cartons for disk storage.
Otherwise, store them on edge (and not leaning), or
stacked horizontally on a spindle, to eliminate any risk of
warps. Any seed residue on disks may attract pests.
Fully enclose dry disks to prevent rodent damage.

Metadata: End of “

Speed Sensor Gap

Meter Brush Maintenance

Refer to Figure 88

1. Raise planter (page 19). Rotate ground drive wheel

until a disk tooth is directly at sensor center-line.

”.

2. Check that wheel teeth are on sensor center-line

side-to-side. As needed, loosen collars on either side
of disk and adjust.

3. Check that center-line of sensor is pointed at

center-line of transfer shaft. As needed, loosen
mounting bolts and adjust.

4. Check gap between top of sensor and toothed

wheel for a dimension of:

1.6mm

To adjust, loosen jam nut . Adjust base nut to set
gap. Re-tighten jam nut.

Metadata: End of “

Speed Sensor Gap

”.

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JIC Torque Chart

Size Foot-Pounds N-m

7

16-20

11- 12 15-1 6

1

2-20

15-16 20-22

5

16-18

18-20 24-28

3

4-16

38-42 52-58

7

8-14

57-62 77-85

11

16-12

79-87 108-119

Hydraulic Maintenance

As with any hydraulic system, contamination is the most
common cause of performance problems and premature
wear. Make a special effort to properly clean quick

couplers prior to attaching the hoses to tractor, and never
let them fall to the ground.

High Pressure Fluid Hazard:

Relieve pressure before disconnecting hydraulic lines.Wear
protective gloves and safety glasses or goggles when working
with hydraulic systems. Use a piece of paper or cardboard,
NOT BODY PARTS, to check for suspected leaks. Escaping
fluid under pressure can penetrate the skin, causing serious
injury. If an accident occurs, seek immediate medical
assistance from a physician familiar with this type of injury.

Bleed only at JIC and NPT fittings.
Never try to bleed a QD (Quick Disconnect) fitting.
Avoid bleeding at ORB fittings. The O-ring is likely to be
torn if any pressure remains in the circuit.

System Contamination Risk:

Always use liquid pipe sealant when adding or replacing NPT
(National Pipe Thread, tapered thread) pipe-thread fittings. To
avoid cracking hydraulic fittings from over tightening, and to
keep tape fragments from clogging filters, do not use plastic
sealant tape.

Over-Torque and Leak Risks:

JIC (Joint Industry Conference 37
require high torque. Excess torque causes leaks. JIC and
ORB (O-ring Boss) fittings do not require sealant.

Bleeding Lift Hydraulics

Normally the lift hydraulics are bled at the factory before
shipping, and bleeding should not be required other than
to raise fully and hold lever on for one minute or until all
cylinders extend fully.

If it is necessary to further bleed lift system, see “Lift
Cylinder Bleeding” on page 80.



Flare) fittings do not

Bleeding Marker Hydraulics

To fold properly, the marker hydraulics must be free of
air. If the markers fold in jerky, uneven motions.

As the marker cylinders are encased within the main tool
bar, it is not practical to bleed them at cylinder fittings.
Remove air from the system by slowly cycling fold and
unfold several times.

Null4.aac:

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Null4:

Figure 89

Bleeding Lift System

31804

1

2

3

1

1

2

2

123

Re-Phasing Lift System

In typical use during a single planting operation, it is
normal for the lift cylinders to get out of phase, resulting
in uneven raising and lowering of the planter.

Every 8- to 10 passes, re-phase the cylinders with this
procedure:

Raise the planter completely, and hold the hydraulic
lever or switch in Retract for several seconds after the
planter reaches full elevation, or until all cylinders are
fully retracted.

When all cylinders are fully retracted, momentarily
reverse (Extend) the control to lower the planter 12mm.

Lift Cylinder Bleeding

Normally the lift hydraulics are bled at the factory before
shipping, and bleeding should not be required other than
to raise fully and hold lever on for one minute or until all
cylinders extend fully.

Refer to Figure 89

If it is necessary to further bleed lift system, follow these
steps.

1. Consult lift circuit hydraulic diagram on page 99

(repeated at right in smaller scale)

2. Check that tractor hydraulic reservoir is full. Set

hydraulics for low flow rate.

3. Lower planter.

4. Loosen the JIC fittings at the rod ends (bottom) of

the three left lift cylinders. Leave the right
undisturbed.

5. Extend the lift circuit until fluid appears at each the

loosened fittings. As fluid appears, set control lever
to neutral and secure each fitting.

6. Retract the circuit. Set control lever to neutral.

7. Extend the lift circuit until both cylinders are fully

extended.

8. Loosen the JIC fitting at the base (top) ends of the

three right lift cylinders. Leave the left undisturbed.

9. Retract the circuit until fluid appears at each

loosened fitting. As it appears, set control lever to
neutral and secure each fitting.

10. Set circuit control to neutral and secure fitting.

11. Unless it is suspected that a large amount of air is in

the line between the cylinders, rely on the normal
re-phasing operation to purge it. Otherwise...

12. Loosen the JIC fitting at the base (top) end of the left

cylinder .

13. Retract lift circuit until fluid appears.

14. Set circuit to neutral and secure fitting.

15. Extend and retract circuit several times.

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Null4:

Figure 90

Transmission Shear Pin

29884

2

1

3

1

2

2

1

1

2

Null4:

Figure 91

Marker Shear Bolt

31794

2

1

3

1

2

3

3

Drive-Line Shear Pin

Refer to Figure 90

The spirol pin that connects main transfer shaft
collar to the transmission shears if an excessive load

is put on the shaft.

Infrequent or improper lubrication causes binding of
moving parts within the planter. This binding can cause
the spirol pin to shear, preventing more serious damage
to other planter parts.

Machine Damage / Nuisance Shear Risks:

Do not use arbitrary spirol pins. Replace sheared pins with
cotter pins of the same size. Strong pins may fail to shear,
causing more serious damage elsewhere. Weaker pins are
prone to nuisance shears. Refer to current Parts Manual for
correct spirol pin replacement part number.

Marker Maintenance (Option)

See also:
“Initial Marker Setup (Option)” on page 110,
“Marker Operation (Option)” on page 32, and
“Marker Disk Adjustment” on page 46

Marker Shear Bolt Replacement

Refer to Figure 91

If a marker gets caught or hits an obstruction, it is
designed to fail a shear bolt at the fold, pivot on a

second bolt (not visible in Figure), and swing back.

5

The shear bolt is a hex head cap screw,
Grade 5, Great Plains part number 802-012C, plus a

5

16-18 lock nut, Great Plains part number 803-011C.

 If an exact replacement is not immediately available,

temporarily substitute an M8x1.25 Class 8.8 bolt and
nut.

Install a replacement shear bolt on the vertical face on
the side opposite from the pivot bolt. Do not use a higher
grade bolt, or marker hang-ups may result in machine
damage. Do not use a lower grade bolt, or you may
experience nuisance shears.

Marker Grease Seal Cap

If grease seal cap for marker-disk-hub bearings is
damaged or missing, disassemble and clean hub.
Repack with grease and install new seal or grease cap.

16-18 x 112in

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Null4:

.eps

50%

Figure 92

Measuring Chain Slack

27264

2

1

1

Null4:

.eps
60%

Figure 93

Chain Clip Orientation

26482

2

Null4:

Figure 94

25AP Meter Drive Chain

31032

5

4

5

3

3

4

5

Chain Maintenance

Inspect and lubricate chains regularly. The slack of new
chains tends to increase during the first few hours of
operation due to seating.

See also “Chain Routing” on page 102.

Chain Slack

Check slack at fixed idlers within the first 8 hours of
operation and tighten idlers as necessary. Check slack at
spring-operated idlers seasonally.

Refer to Figure 92, which, for clarity, greatly
exaggerates slack, and omits the idlers.

1. Measure the span for allowable slack:

Locate the longest span of each chain (usually the
span which does not run through the idlers).

2. Determine the ideal slack (cm per meter):

Long chains (over 91 cm): 2.1 cm/m
Vertical short chains: 2.1 cm/m
Horizontal short chains: 4.2 cm/m.

3. Measure the current slack :

Acting at a right angle to the chain span at the center
of the span, deflect the chain in both directions. The
slack is the distance of the movement.

4. Adjust the idlers for ideal slack.

Chain Clips

Whenever mounting a chain, make sure the clip at the
removable link is oriented to minimize snags.

Refer to Figure 93 (arrow shows chain direction)

Install clip with open end facing away from direction of
chain travel (shown by gray or striped arrows in chain
routing diagrams).

Meter Drive Chain

Refer to Figure 94 (which depicts planter raised, and
depicts a 4-spring opener, used on other planter
models)

When performing periodic lubrication, check chain
condition. Replace chain if any frozen kinks are not
corrected by lubrication.

When performing seasonal checks, lower planter to put
chain at minimum idler spring tension.

Check that idler spring length , measured from outside
of pin to outside of pin, is not shorter than:

17.8 cm

Lift spring off idler assembly . Check that idler
assembly pivots freely. Re-attach spring.

Check chain clip orientation. Check chain routing at
shank idler(s) (see page 106).

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 You may need fewer washers under worn disks.

Figure 95: 25AP

Spreaders and Scrapers

22839

 It is normal for the blade spreader to have some

looseness in the holder and between the blades.
Some looseness is required for proper operation.

1

3

2

4

5

3

4

13245

Null4:

Sharp Object Hazard:

Be careful when working in this area. Disk edges are sharp.

Figure 96

Side Gauge Wheel Shims

21894

{

4

2

3

8

1

7

6

5

4

123435678

Spreaders and Scrapers

 Applies to all row unit Series.

Refer to Figure 95

1. Remove side gauge wheels from arms to access

row-unit disks and scrapers.

2. With the unit raised, check blade spreader for

wear. Replace spreader if it is 13 mm wide or
narrower. To replace, remove disk blades , drive
out roll pins , and install new spreader.

3. When reinstalling disk blades, put two shims

between bearing and shank on each blade. Tighten
bolts.

4. Check amount of contact between blades, and

adjust number of shims as needed. Store extra
shims on outside of blade. See “Opener Disc
Contact Region” on page 50.

5. Check that outside disk scrapers are formed to

disk blades to help remove any mud. Bend/twist
scrapers to fit blades as needed. Every 200 acres of
operation, check outside scrapers for adjustment
and wear. Replace outside scrapers as necessary.

Row-Unit Side Wheels

Refer to Figure 96

1. Lift opener side wheel off the ground. Move tire in and

out to check for end play. Check for roughness in
bearing by rotating wheel. If bearings are rough,
inspect and replace if necessary.

2. Side wheels are preset at the factory. Due to normal

wear it may become necessary to make adjustments
so the wheel remains close to the disk. To prevent
plugging, loosen clamp bolt and slide arm inward
to take up gap between side wheel and disk blade. If
more adjustment is needed, go to step 3.

3. Remove bolt and wheel . Remove shims

from the inside of wheel and place them on the
outside of wheel. Always place removed shims from
the inside to the outside. When installed, wheel
should turn freely and not hit the arm at the curve.
Do not add any more shims than necessary.

4. Disassemble side gauge wheel arm from unit.

Remove bushing from sleeve and check for
wear. If necessary, replace bushing.

5. When reinstalling side gauge wheels, align tab on

hex adjustment with notch in bushing. Replace
bolt and tighten.

6. Adjust side gauge wheels. Refer to see “Side Gauge

Wheel Adjustment” on page 51.

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Figure 97

Seed Tube Flap

31047

2

1

121

2

Seed Flap Replacement

Refer to Figure 97

To replace a seed flap , use a needle nose pliers or
similar tool to grasp “T” top of flap. Pull upward to pull

flap up out of metal bracket .

Push new seed flap down through metal bracket
until flap snaps into place with “T” top resting on top of
bracket.

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50

Multipurpose
spray lube

Multipurpose
grease lube

Multipurpose
oil lube

Intervals (service hours)
at which lubrication is
required

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21960

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15052

Null4:

25475

Null4:

25474

Lubrication

Opener Side Wheel Bushing

8

2 zerks per bushing,
2 bushings (4 zerks) per row;
72 zerks total (18-row planter)

Type of Lubrication: Grease
Quantity: Until grease emerges

Null4:

Gauge Wheel Module Forward Pivot

4 modules per planter,
one zerk per pivot;
4 total

Type of Lubrication: Grease
Quantity: Until grease emerges

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Markers (Option)

4 zerks per marker,
two markers;
8 total

Type of Lubrication: Grease
Quantity: Until grease emerges

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10

10

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31872

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29885

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31789

Coulter Hubs (Option)

10

1 zerk per coulter,
12 total

Type of Lubrication: Grease
Quantity: Until resistance is felt

Re-pack seasonally.

Null4:

Chain: Contact Drive, Lower

As Required

1 chain

Type of Lubrication: Chain Lube
Quantity = Coat thoroughly

 Lubricate chains any time there is a chance of

moisture, and when being stored at the end of the
planting season.

Null4:

Chain: Contact Drive, Upper

As Required

1 chain

Type of Lubrication: Chain Lube
Quantity = Coat thoroughly

 Lubricate chains any time there is a chance of

moisture, and when being stored at the end of the
planting season.

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31841

Null4:

29616

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31789

Chains: Fertilizer Drive (Option)

As Required

3 chains

Type of Lubrication: Chain Lube
Quantity = Coat thoroughly

 Lubricate chains any time there is a chance of

moisture, and when being stored at the end of the
planting season.

Null4:

Chains: Meter Drive

As Required

1 chain each meter

Type of Lubrication: Chain Lube
Quantity = Coat thoroughly

 Lubricate chains any time there is a chance of

moisture, and when being stored at the end of the
planting season.

Null4:

Chain: Range Drive

As Required

1 chain

Type of Lubrication: Chain Lube
Quantity = Coat thoroughly

 Lubricate chains any time there is a chance of

moisture, and when being stored at the end of the
planting season.

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31713

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31597

Chain: Transmission Drive

As Required

1 chain

Type of Lubrication: Chain Lube
Quantity = Coat thoroughly

 Lubricate chains any time there is a chance of

moisture, and when being stored at the end of the
planting season.

Null4:

Coulter Pivot (Option)

20

1 zerk per coulter,
12 total

Type of Lubrication: Grease
Quantity: Until grease emerges

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Tire Pressures

20

2 gauge wheels,
2 lift-assist wheels (twin- and triple-row only);
2 or 4 tires total

Check tire pressures more frequently on a new
implement, and with new tires. Check tire pressures
before making any level adjustments, and whenever
there are application problems.

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29885

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29883

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16489

Ground Drive Wheel Hub

50

1 zerk at each bearing casting;
4 total

Type of Lubrication: Grease
Quantity: Until grease resistance felt

Re-pack seasonally.

Null4: Null4:

Gauge Wheel Hubs

Seasonal

1 zerk each spindle;
2 total

Type of Lubrication: Grease
Quantity: Until resistance is felt

Null4:

Markers: Disk Hub

4 bearings; 2 races each marker

Type of Lubrication: Grease
Quantity: Re-pack

MetaData: End of “

Lubrication

”

Seasonal

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.eps

66.7%

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36369

.eps
20%

Seed Lubricants

To maximize performance of Great Plains metering
systems, it is imperative to use “Ezee Glide Plus” or
Bayer Seed Fluency Agent.

Ezee Glide Plus Talc+Graphite Mix

821-069C bucket, 5 gallon (19 liter)

Ezee Glide Plus Lubricant
“Ezee Glide Plus”is suitable for all seeds, especially
treated or inoculated seed, except where talc and
graphite mixes are prohibited. Thorough mixing of seed

and added lubricant is required.

Recommended usage:

For clean seeds other than milo, cotton, and sunflowers
sprinkle one cup of Ezee Glide Plus Talc per 4 bushels or
units (170 ml per 100 liters) of seed.

For milo, cotton, and sunflowers double the application to
one cup (or more) per 2 bushels or units (335 ml per
100 liters) of seed.

For canola or mustard, 1 cup (240 ml) per 30 pound
(13.6 kg) bag is a minimum starting value. Mix the seed
lubricant early during the seed loading. Use more
lubricant in extremely dry conditions.

Adjust this rate as necessary so all seeds become
coated while avoiding an accumulation of lubricant in the
bottom of the hopper.

For seed with excessive treatment, or for humid planting
environments, increase the rate as needed for smooth
meter operation.

Irritation and Chronic Exposure Hazard:

Wear gloves. DO NOT use hands or any part of your body to
mix seed lubricant. Wear a respirator when transferring and
mixing. Avoid breathing lubricant dust. Not an acute hazard.
May cause mechanical eye or skin irritation in high
concentrations. As with all mineral spills, minimize dusting
during clean-up. Prolonged inhalation may cause lung injury.
Product can become slippery when wet.

Bayer Seed Fluency Agent

821-074C Fluency Powder, case quantity
821-075C Fluency Powder, single 4.4 pound bucket

This agent is required by regulation for certain crops in
certain regions (such as corn and soybean in Canada).
It is an alternative to Ezee Glide Plus in other locales, for
large seeds. It is not recommended for smaller seeds
such as canola and milo.

Refer to the booklet affixed to the bucket for
recommended usage. Do not exceed those
recommendations, as excess amounts adversely affect
accurate metering.

Dust and Explosion Hazard:

Avoid exposure to dust when mixing this powder into seed.
Avoid creating dust in any confined space with ignition sources
present, as specific concentrations can be explosive. Consult

the instruction booklet and SDS

a

for further cautions.

a. SDS: Safety Data Sheet, formerly Material Safety Data Sheet (MSDS).

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29872

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31872

Options

Dual Sequenced Markers

A marker system includes hydraulic cylinder, marker arm
and mount for left and right side, plus an automatic
sequence valve that controls which side activates, and at
what speed. The marker system requires one tractor
remote.

The system is factory installed, but ordered as a
separate line item.

Description Order Number

6-110 PT PLTR FLAT FOLD MKR 113-862A

See “Marker Operation (Option)” on page 32.

Marker installation is documented in manual part number
113-870M.

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Frame-Mounted Row Accessories

Frame-Mounted Coulters

Coulters required for dry fertilizer delivery. They include
51 cm blades, and dry fertilizer applicator tubes. The
bundles below provide two coulters for each triple-row.

Coulters are sold separately to provide a choice of blade
disks.

Coulter Bundle Part Number

YP625 PT 18 DRY FRT CLTR 20 TB

(12 coulters with Turbo blades)

YP625 PT 18 DRY FRT CLTR 20 FT

(12 coulters with Fluted blades)

See page 42 and page 44 for adjustments.

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407-591A

407-592A

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31260

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Fluted

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Turbo

Null4:

31873

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27226

51 cm (20in) Coulter Blades

Blade Type

COULTER BLADE 20 FLUTED

(8 mm wave at edge of full 51.9 cm)

5/8 WAVY-20" TURBO BLADE

(18.8 mm wave at edge of full 51.4 cm)

Null4:

Part

Number

820-074C

820-180C

Dual Terra-Tine™ Row Cleaners

These row cleaners are frame-mounted behind the
coulters and ahead of the openers. The bundle below
includes 12 dual row cleaners, which mount in-line with
the center row of each triple.

Order one kit per planter:

Terra-Tine Part Number

YP625-18TP FM DOUBLE TT 207-251A

For operations, See “Dual Terra-Tine™ Adjustment

(Option)” on page 45.

Row-Mounted Accessories

Lock-Up Pins

If rows are shut off, you can reduce unnecessary wear
on the unused row units by locking them up. Order one
per row unit locked-up.

Description Part Number

PIN HITCH 1 X 6 W/HAIRPIN 805-435C

See “Row Unit Shut-Off” on page 56.

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29594

See “Seed Meter Setup and Adjustment” on page 53.

Meter Disk

Part Number

Blank, 0 Cell 817-841C

Null4:

29185

Seed Meter Disks

Air-Pro® meters accept a variety of seed disks, plus a
special blank disk for row shut-off. Choices include:

Meter Disks

Canola, 150 Cell 837-148C

Canola, 250 Cell 817-991C

Corn, 24 Cell (Large; Flat) 817-836C

Corn, 24 Cell (Large; Round) 817-794C

Corn, 24 Cell (Medium; Round) 837-126C

Corn, 24 Cell (Small; Round or Flat) 817-795C

Corn, 40 Cell (Large; Flat) 817-838C

Corn, 40 Cell (Large; Round) 817-796C

Corn, 40 Cell (Medium; Round) 837-127C

Corn, 40 Cell (Small; Round or Flat) 817-797C

Cotton, 60 Cell 817-857C

Edible Bean, 56 Cell (Large) 817-967C

Edible Bean, 60 Cell (Medium) 837-065C

Hill Drop Cotton, 12 Cell 837-186C

Industrial Hemp, 5 Cell 837-364C

Industrial Hemp, 30 Cell 837-386C

Milo, Pelletized Sugar Beet, 30 Cell 837-057C

Milo, Pelletized Sugar Beet, 65 Cell 817-849C

Milo, Pelletized Sugar Beet, 130 Cell 817-800C

Soybeans, 84 Cell 817-798C

Soybeans, 168 Cell 403-551D

Sunflower Oil, 24 Cell (Large) 817-851C

Sunflower Oil, 60 Cell (Medium) 837-235C

Sunflower Oil, 60 Cell (Small) 837-234C

Wheat, Rice, 84 Cell (Volumetric) 817-867C

Part Number

Inside Disk Scrapers

When planting in moist or sticky soils, these scrapers are
useful in preventing build-up that might otherwise impair
opener disc performance.

Description

Inside Scraper 122-278S

This scraper cannot be used with Seed-Lok
firmers installed. It is also compatible with seed flaps and

optional Keeton

®

seed firmers.

See page 111 for scraper installation. The spring-loaded
carbide scraper requires no adjustment.

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Part

Number

®

seed

YP625PD Table of Contents Index Options 94

Null4:

25298

25293

Null4:

28316

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Gauge Wheel Scrapers

When planting in moist or sticky soils, these scrapers are
useful in preventing build-up that might otherwise result
in shallow planting.

Order one part per wheel (2 per opener).

Wheel Scrapers Part Number

212 in. (6.4 cm) scraper 404-194D

3 in. (7.6 cm) scraper 404-195D

4 in. (10.2 cm) scraper 404-196D

The scrapers mount on the bottom rear of the depth
wheel arm, using existing hardware. The slot in the
scraper is long enough to clear the lower grease zerk,
and allow adjustment as wheel and scraper wear.

For operations, see:
“Adjusting Gauge Wheel Scrapers (Option)” on
page 52.

Seed Firmers

The base YP625PD planter requires a choice of row unit
bundles which include one of three firmers: seed flap,

Keeton
may be installed at the same time. Order one per row.

Seed-Lok

®

, or Seed-Lok®. Only one type of seed firmer

®

Seed Firmer

Description Part Number

25 Series Seed-Lok® kit (per opener) 404-093K

For operations, see:
“Seed Firmer Adjustments” on page 59.

Null4:

Keeton® Seed Firmer

®

The Seed-Lok

seed firmer supports low-rate fertilizer
delivery. For this use, a liquid fertilizer system must also
be installed.

Description Part Number

Keeton® seed firmer (per opener) 890-840C

For operations, see:
“Seed Firmer Adjustments” on page 59.

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29331

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29248

.eps

66.7%

Null4:

36369

.eps
20%

Null4:

29992

Row Unit Press Wheels

The base Yield Pro planter includes a choice of press
wheels. Additional wheels are available, and all may be
field-installed.

This manual does not list kit part numbers as the
available wheels are often region-specific. Consult your
Great Plains dealer.

For operations, see:
“Press Wheel Adjustment” on page 60.

Null4:

Seed Lubricant

Description Order Number

Ezee Glide Plus Talc + Graphite Mix (5

gallon / 18.9 liter container)
Fluency Powder, case quantity 821-074C
Fluency Powder, single 4.4 pound bucket 821-075C

For use, see “Seed Lubricants” on page 90.

821-069C

Null4:

Clean-Out Container

One container is provided with the planter. Order the
following part for additional or replacement containers.

Description

AIR METER CLEAN OUT FUNNEL 817-811C

See “Funnel Conversion” on page 73.
See “Meter Clean-Out” on page 74.

Null4:
MetaData: End of “

Options

”

Order

Number

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YP625PD Table of Contents Index Appendix A - Reference Information 96

Model YP625PD-18TP110

Row Count

18

Row Spacing

110 cm

Swath Averaged Row Spacing

36.7 cm

Width, no Markers

695 cm

Width, with Markers

705 cm

Span (between end openers)

600.8 cm

Swath (Channel Width)

660.0 cm

Seed Monitor

DICKEY-john® PM400*

Seed Capacity

761 liters

Transport Length

490 cm

Field length

495 cm

Transport Height, no markers

247 cm

Transport Height, w/ markers

275 cm

Working Height, no markers

195 cm

Working Height, w/ markers

223 cm

Transport Clearance

35.6 cm

153 - 160 kW

Hitch

Pull-Type

2 or 3 Remotes, Closed-Center, 155 bar, 53 liters/min

4000 kg
6600 kg

Transport Tire Size

8R19.5 LT

Opener Down Pressure

138 to 247 kg

Opener Travel (Up - Down)

25 cm

Opener Depth Range

0 to 8.9 cm

1. Power requirements vary significantly with conditions and practices.

* Planter functions not monitored include: fan rpm, hopper level, implement lift, manifold pressures, fertilizer rate

Minimum Tractor Power¹

Hydraulic Circuits Req.

Weight (empty, base)²

Weight (maximum, full)³

2. No fertilizer, markers, coulters, row cleaners or materials loaded.

3. Weight can vary by hundreds of kilograms depending on options installed. See Transport topic.

Appendix A - Reference Information

Specifications and Capacities

Tire Inflation Chart

Tire Inflation Chart

Wheel Tire Size Inflation

Transport/

Gauge

8R19.5 LT

110 psi

(760 kPa)

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Tire Warranty Information

All tires are warranted by the original manufacturer of the tire. Tire
warranty information is found in the brochures included with your
Operator’s and Parts Manuals or online at the manufacturer’s web sites
listed below. For assistance or information, contact your nearest
Authorized Farm Tire Retailer.
Manufacturer
Firestone www.firestoneag.com
Goodyear www.goodyearag.com
BKT www.bkt-tires.com
Titan www.titan-intl.com
Gleason www.gleasonwheel.com

Web site