Page 1 Table of Contents Index Operator Manual YP4425A ® 44 Foot 3-Section Yield-Pro Planter ® with Air-Pro Seed Meters Manufacturing, Inc. www.greatplainsmfg.com Read the operator manual entirely. When you see this symbol, the subsequent instructions and warnings are serious - follow without exception.
Page 2 Table of Contents Index Machine Identification Record your machine details in the log below. If you replace this manual, be sure to transfer this information to the new manual. If you or the dealer have added options not originally ordered with the machine, or removed options that were originally ordered, the weights and measurements are no longer accurate for your machine.
Page 3 Great Plains Manufacturing, Inc. assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein. Great Plains Manufacturing, Inc. reserves the right to revise and improve its products as it sees fit.
Page 4 YP4425A Cover Index 25 Series Row Unit Adjustments ........67 Fertilizer System............109 Row Unit Down Pressure .........68 Liquid Fertilizer Strainer .........109 Unit-Mount Row Cleaner Adjustments .....70 Lubrication..............110 Coulter Adjustments ..........71 Seed Lubricants ............120 Options ................121 Row-Unit Opener Disk Adjustments......73 Side Gauge Wheel Adjustment ........74 Hydraulic Tongue ............121 Seed Meter Setup and Adjustment ......76 Markers .................122...
Page 5 YP4425A Table of Contents Index 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.
Page 6 YP4425A Table of Contents Index Important Safety Information Wear Protective Equipment  Wear protective clothing and equipment.  Wear clothing and equipment appropriate for the job. Avoid loose-fitting clothing.  Because prolonged exposure to loud noise can cause hearing impairment or hearing loss, wear suitable hearing protection such as earmuffs or earplugs.
Page 7 YP4425A Table of Contents Index Important Safety Information Use A Safety Chain (Optional hydraulic hitch only. 3-Point has no 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.
Page 8 YP4425A Table of Contents Index Important Safety Information Keep Riders Off Machinery Riders obstruct the operator’s view. Riders could be struck by foreign objects or thrown from the machine.  Never allow children to operate equipment.  Keep all bystanders away from machine during operation. Transport Machinery Safely •...
Page 9 YP4425A Table of Contents Index Important Safety Information 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.
Page 10 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.
Page 11 YP4425A Table of Contents Index Important Safety Information Daytime Reflectors 838-267C On rear face of axle (above Red reflectors); two total 34046 Amber Reflectors 838-265C On the front of the center section front lower tool bars, on the rear of the wing tool bars, and on the sides of the seed cart frame;...
Page 12 YP4425A Table of Contents Index Important Safety Information Danger: Crushing Hazard 818-590C Top center of 3-point hitch (not present with hydraulic tongue option); 34046 one total Danger: Electrocution Hazard 838-599C One each side of marker upright arm, each side; four total 34046 Warning: Pinch/Crush 818-045C...
Page 13 YP4425A Table of Contents Index Important Safety Information Warning: Speed 818-188C WARNING EXCESSIVE SPEED HAZARD To Prevent Serious Injury or Death: Do Not exceed 20 mph maximum transport speed. Loss of vehicle control and/or machine can result. 818-188C Rev. C On front of center section, one total 34046...
Page 14 YP4425A Table of Contents Index Important Safety Information Warning: High Pressure Fluid 838-094C On side of tongue at hitch; one total 34046 Caution: Transport Locks 818-351C Hitch tongue; one total 34046 Caution: Tires Not A Step 818-398C One front face each wing gauge wheel, One each side front center axle, One each rear face of rear caster arms;...
Page 15 YP4425A Table of Contents Index Important Safety Information Caution: Read Operator’s Manual 818-587C CAUTION Read Owner’s Manual before using machine. Stand clear when folding and unfolding markers. Stand clear when raising and lowering machine. Keep all safety shields and devices in place. Keep hands, feet, and clothing away from moving chains and sprockets.
Page 16 YP4425A Table of Contents Index Introduction Great Plains welcomes you to its growing family of new ® product owners. The 44 Foot 3-Section Yield-Pro Planter (YP4425A Planter) has been designed with care and built by skilled workers using quality materials.
Page 17 Refer to Figure 2 Your machine’s parts were specially designed and should only be replaced with Great Plains parts. Always use the serial and model number when ordering parts from your Great Plains dealer. The serial-number plate is located on the left end of the rear mainframe tool bar, near the highway lights.
Page 18 YP4425A Table of Contents Index Preparation and Setup This section helps you prepare your tractor and YP4425A 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.
Page 19 Only trained personnel should work on system hydraulics Great Plains hydraulic hoses have color-coded handle grips to help you hookup hoses to your tractor outlets. Hoses that go to the same remote valve are marked with...
Page 20 YP4425A Table of Contents Index Preparation and Setup Current Style Color Coded Hose Handles Color Hydraulic Function Green Wing Fold / Marker Fold / Auxiliary Blue Lift / (and Hitch if hydraulic tongue) Black Hydraulic Drive Yellow Weight Transfer (option) Refer to Figure 3 To distinguish hoses on the same hydraulic circuit, refer to the symbol molded into the handle grip.
Page 21 YP4425A Table of Contents Index Preparation and Setup Electrical Hookup Refer to Figure 5 Make sure tractor is shut down with accessory power off before making connections. 1. Mate lighting connector to tractor outlet. 2. Mate monitor connector to tractor harness. 3.
Page 22 YP4425A Table of Contents Index Preparation and Setup Hitching with Hydraulic Tongue (Option) Refer to Figure 7 3. Move the tractor to near hitching position. OPEN 4. Connect the hydraulic hoses for the tongue circuit. This needs to be done before hitching in order to raise and lower the tongue.
Page 23 YP4425A Table of Contents Index Preparation and Setup Parking Stands Store Main Parking Stand Refer to Figure 9 (which depicts the similar YP40 hitch) 1. Raise the tractor hitch slightly to lift parking stands off ground. 2. Remove the lower pin and the upper pin holding the parking stand 3.
Page 24 YP4425A Table of Contents Index Preparation and Setup Fertilizer Connection Types Type Description 2-section, Planter manifold and pump: Starter inlet only 3-section, cart manifold and pump: Left, Center, Right inlets & Gauge line Making Fertilizer Connections PFC2000 tank cart, YP4425A Planter with Type 2 and Type 3 Manifolds, & Ground Drive Pump Planter Inlet Gauge Line Left Type 3...
Page 25 YP4425A Table of Contents Index Preparation and Setup [Re]set the tongue height to this value when planting. Checking Planter Height The Planter is designed to operate with all sections of the main tool bar nominally 26 inch (66 cm) above the planting surface.
Page 26 YP4425A Table of Contents Index Preparation and Setup Fertilizer Drive Lock Up Loss of Control and Sharp Object/Crushing Hazards: Do not lift or lower wheel by spoke or rim; use handle only. Keep feet out from under wheel. 90 pounds (41 kg) force is required to lift wheel.
Page 27 YP4425A Table of Contents Index 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 YP4425A Planter to the field.
Page 28 YP4425A Table of Contents Index Operating Instructions Unfolding the YP4425A Planter The distance between the tractor and the seed structure decreases by 12 feet (3.7 m) during unfolding. Planter, tractor, or both will move during this operation. Crushing, Pinch-Point and Overhead Hazards - To prevent serious injury or death: ...
Page 29 YP4425A Table of Contents Index Operating Instructions Unfolding, Continued ... 7. Raise tractor 3-point hitch or extend (raise) Planter hydraulic tongue until tongue wing locks rise and disengage. Machine Damage Risk: Raise hitch before unfolding. If hitch is not raised, wing locks will remain in transport hooks.
Page 30 YP4425A Table of Contents Index Operating Instructions Raising/Lowering Planter General Raise/Lower Information Planter raising/lowering relies on the four lift cylinders at the mainframe and wing end gauge wheels. The Planter must be raised for folding and unfolding. The Planter will not lower if transport locks are installed. See “Installing Lift Cylinder Locks”...
Page 31 YP4425A Table of Contents Index Operating Instructions Raising Planter Refer to Figure 24 1. If the Planter has hydraulic hitch, set the Lift/Hitch Pinch/Crush Risk: switch to LIFT. Keep all personnel clear of center section and seed cart while raising tool bar. The wheels move inward. ...
Page 32 YP4425A Table of Contents Index Operating Instructions Installing Lift Cylinder Locks When moving the raised Planter more than a short distance, or over any public road, or when performing adjustments or maintenance, do not rely solely on the lift cylinders to keep the mainframe raised. Install transport locks.
Page 33 YP4425A Table of Contents Index Operating Instructions Folding the YP4425A Planter Fold the YP4425A Planter for moves between fields and over public roads, and for storage. The distance between the tractor and the seed structure increases by 12 feet (3.7 m) during folding. Planter, tractor, or both will move during this operation.
Page 34 YP4425A Table of Contents Index Operating Instructions Refer to Figure 29 If caster locks are engaged (handle in FIELD position), they must be released before folding. Machine Damage Risk: Caster locks must be disengaged for transport. 5. At each wing caster, move the lock control handle to the ROAD position.
Page 35 YP4425A Table of Contents Index Operating Instructions Rephasing Fold System In typical use during a single planting operation, it is normal for the fold cylinders to get slightly out of phase, resulting in uneven folding and unfolding of the YP4425A. Every few planting days, rephase the cylinders with this procedure: 1.
Page 36 YP4425A Table of Contents Index Operating Instructions Transporting the Planter Loss of Control Hazard: Ensure that the towing vehicle is adequate for the task. Using an inadequate tow vehicle is extremely unsafe, and can result 29284 in loss of control, serious injury and death. 29284 The Planter can weigh over 28000 pounds (12 500 kg), depending on configuration and seed load.
Page 37 YP4425A Table of Contents Index Operating Instructions Typical YP4425A Planter Weights YP4425A-2422 YP4425A-2422 YP4425A-2422 YP4425A-2422 150 bu Hopper, 150 bu Hopper, Standard Configuration 82 bu Hopper, Fertilizer Unit-Mount Coulters UMC/RC, and and 82 bu Hopper Tanks and Boom and Row Cleaners PFC2000 Tank Cart* Empty 28800 lbs...
Page 38 YP4425A Table of Contents Index Operating Instructions Loading Materials Walkboard and Ladder Walkboard pin and pivot operation is covered on page 38. Refer to Figure 32 The bottom two steps of the walkboard ladder is a swing-down section. To release it, pull the spring-loaded forward and pull the top of the free end of the ladder back.
Page 39 YP4425A Table of Contents Index Operating Instructions Auxiliary Hydraulics Refer to Figure 35, Figure 36 and Figure 37 The YP4425A Planter includes, as standard equipment, an auxiliary hydraulic circuit, intended to power a seed auger for loading bulk hoppers. The Aux quick-disconnect ports are on the frame.
Page 40 YP4425A Table of Contents Index Operating Instructions 82 Bushel Hopper Operation Approximate capacity of 82 bu. bulk seed hopper, in bushels, at 10 inch increments. Tipping Hazard: Load an 82 bu. hopper only when mounted on the cart. A full hopper can weigh over 5500 lbs (2500 kg), which is above the lifting and balance capability of most tractors and farm forklifts.
Page 41 YP4425A Table of Contents Index Operating Instructions 150 Bushel Hopper Operation Approximate capacity of 150 bu. bulk seed hopper, in bushels, at 10 inch increments. Tipping Hazard: Load a 150 bu. hopper only when mounted on the cart. A full hopper can weigh over 10000 lbs (4500 kg), which is above the lifting and balance capability of most tractors and farm forklifts.
Page 42 YP4425A Table of Contents Index Operating Instructions Changing the Seed Box or Hopper  The YP4425A Planter accepts the Great Plains 82 bu. hopper,150 bu. hopper, or bulk seed boxes ® that meet the Pioneer PROBOX specification. Tipping and Overload Hazard: Place or remove a hopper only when empty.
Page 43 YP4425A Table of Contents Index Operating Instructions 15. If mounting a seed box for the first time in a season, open the new seed box and measure out approximately 3 gallons (11 liters) of seed into a pail. cup (80 ml) of lubricant. Mix and pour into air box before mounting new seed box.
Page 44 YP4425A Table of Contents Index Operating Instructions Air System Operation Figure 44 29595 ® Yield-Pro Air System for Air-Pro Seed Metering Meter Pressurization System Elements ( shows air direction) ® Hydraulic Fan Pressure Sensor Lines Air-Pro Seed Meter Split-Air Manifold Pressure Sensor Chamber Row Pressurizing Tubes Servo-Controlled Vane...
Page 45 YP4425A Table of Contents Index Operating Instructions Air System Overview The hydraulic fan supplies air for both seed delivery and meter operation. Fan rpm is operator-adjusted (page 43) via the tractor’s hydraulic flow control, and reported by the seed monitor system. The rest of the system is fully automatic.
Page 46 YP4425A Table of Contents Index Operating Instructions Fan Circuit Operation See also “Fans” on page 61. Refer to Figure 45 Three hydraulic hoses serve the fan, and must be properly connected for the fan to operate in the correct direction , at recommended speeds, and without damage.
Page 47 54 - 64 lpm two readings should not disagree by more than a few ¹ This assumes a 2007+ Great Plains hopper, or older hopper tenths of an inch. with the vent line update. For an older unvented hopper, use the ...
Page 48 YP4425A Table of Contents Index Operating Instructions Airbox Operation Refer to Figure 46 The function of the airbox is to mix seed with turbulent air from the hydraulic fan, which then exits through a manifold (not shown) to the seed tubes which serve the row unit meters.
Page 49 YP4425A Table of Contents Index Operating Instructions Monitor Operation Monitor operation is described in a separate manual supplied with your YP4425A Planter. Operations covered in that manual (and therefore not in this manual) include: • hydraulic drive control • seed rate calibration •...
Page 50 YP4425A Table of Contents Index Operating Instructions Electric Clutch Lock-Up In case of electric clutch failure, an electric clutch can be mechanically engaged. Refer to Figure 50 and Figure 51 1. Remove the rubber plugs from the oil shield disc to allow access to the lock-up holes.
Page 51 YP4425A Table of Contents Index Operating Instructions ® Air-Pro Meter Operation Refer to Figure 53 The meter disc is driven, top forward, by a chain drive (not shown) always connected to the section drive shaft. Seed is air-delivered to the inlet above the air release screen .
Page 52 YP4425A Table of Contents Index Operating Instructions Fertilizer Tanks (Option) Agricultural Chemical Hazards: Avoid contact with skin or eyes. Wear proper protective equipment as required by chemical manufacturer. Avoid prolonged breathing of chemical fumes. Wear respirator as required by chemical manufacturer. Some chemicals will cause serious burns, lung damage and death.
Page 53 Index Operating Instructions Trailer Operations The YP4425A Planter optionally includes a trailing pintle hitch, intended for use with Great Plains PFC1600 or PFC2000 fertilizer tank carts. Hitching/hook-up and operating instructions are found in the tank cart Operator’s Manual. Figure 55...
Page 54 YP4425A Table of Contents Index Operating Instructions 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. Mechanical Checklist Page Row Units Checklist Page...
Page 55 YP4425A Table of Contents Index Operating Instructions Hydraulic System Checklist Page Hydraulic Planter Drive Checklist Page Check tractor hydraulic reservoir full Check chain lubrication and slack Inspect connections for leaks Input initial values for desired population Pre-run system using manual ground speed Perform a raise and lower operation mode on seed monitor.
Page 56 YP4425A Table of Contents Index Operating Instructions Field Operation Perform all steps in “Pre-Start Checklist” on page 23 and “Field Set-Up Checklists” on page 50. First Pass Operation Checklist Page Ending Planting Checklist Page Set tractor 3-point hitch to “depth control” Suspend operations as above, then operation (and not load control) Install lift locks...
Page 57 YP4425A Table of Contents Index Operating Instructions Unfolding Markers Electrocution Hazard: Beware of overhead electrical lines. If the markers contact lines, the tractor, raised Planter and any cart can become “hot” with no indication. A person standing on the ground and touching equipment can complete the circuit.
Page 58 YP4425A Table of Contents Index Operating Instructions Row Marker Operation Monitor Operation To alternate which side is marked: Monitor operation is described in a separate manual supplied with your YP4425A Planter. 1. Move the tractor’s circuit control to fold marker. Hold until marker is folded.
Page 59 YP4425A Table of Contents Index Operating Instructions Short-Term Parking 1. Fold markers. See “Folding the Markers” on page 54. 2. Choose a location with level firm ground. Do not unhitch on a slope. Planter” 3. Raise Planter.See “Raising page 27. 4.
Page 60 Long-Term Storage Complete Parking steps first. 1. Park the planter indoors if possible, per the steps above. Great Plains recommends parking/storing in the raised configuration, folded, on the parking stands and with all lift cylinder locks installed. 2. If no hopper or seed box is mounted, cap air box.
Page 61 YP4425A Table of Contents Index Adjustments To get full performance from your YP4425A Planter, you Even if your planting conditions rarely change, some of need an understanding of all component operations, and these items need periodic adjustment due to normal many provide adjustments for optimal field results.
Page 62 YP4425A Table of Contents Index Adjustments Setting Material Rates Planting Rate Adjusting the planting rate requires the following: 1. Monitor configuration: The seed monitor must be set up with the correct row count, row spacing and disc cell count. See the ®...
Page 63 The switch is located at the rear cross tube on the planter’s left side. Although factory-preset for typical planting conditions, Great Plains recommends adjusting this switch for your exact field conditions and planting depth. Crushing Hazard: Exercise extreme caution when adjusting the switch.
Page 64 YP4425A Table of Contents Index Adjustments Marker Adjustments • Disk Angle -Even if your row spacing rarely changes, you may need to adjust disk angle for soil conditions and planting speed. • Shear Bolt Replacement (Maintenance, page 103) If a marker hangs up on an obstruction, a bolt at the fold is designed to fail.
Page 65 YP4425A Table of Contents Index Adjustments Fans Fans on PTO For fans powered by an optional PTO kit (page 121), the fan speed is set at the kit’s flow control valve. See manual 411-015M for details. Fans on Hydraulic Remotes 1.
Page 66 YP4425A Table of Contents Index Adjustments 12. During the first pass, take note of the average Small seeds, such as Milo, may be under-reported. Use populations reported on the seed monitor. the “Alternate Skip/Double Check” below to verify Typical Location: Item: seed status at the disc pockets.
Page 67 YP4425A Table of Contents Index Adjustments Fine-Tuning Meter Pressurization After several passes, and you are comfortable with the Alternate Skip/Double Check Planter’s operation, optimize meter Small seeds, particularly Milo, are less reliably sensed as pressurization. Use this method during longer passes, so skips or doubles by the seed tube sensors, and watching there are fewer distractions (and see sidebar regarding monitor population is unlikely to locate the pressure...
Page 68 The mesh screen size must be compatible with the orifice plates in the distribution system. Refer to the Seed Rate manual. Great Plains recommends checking with your local agronomist as soil conditions vary. Soil conditions in your area may need less or more fertilizer than represented in these charts.
Page 69 YP4425A Table of Contents Index Adjustments Ground Drive Pump Refer to Figure 69 With a Type 2 fertilizer system, the pump is driven by a ground contact wheel . Fertilizer rate is independent of seed rate. Fertilizer coarse rate is set by a driving sprocket on the ground drive assembly, and fine rate is adjusted at the setting hub (dial)
Page 70 YP4425A Table of Contents Index Adjustments Fertilizer Relief Valve Refer to Figure 71 When a “Type 2” fertilizer system is installed, a relief valve and pressure gauge are mounted at each ground drive pump. The relief valve protects the manifold, lines and fittings from excessive pressure. Any product that dumps over the relief valve will discharge from the dump line in relative safety.
Page 71 Refer to Figure 73 (which depicts a row unit populated with most optional accessories supported for use with the YP4425A Planter) From front to back, a Great Plains 25 Series row unit can include the following capabilities (some optional): 1. Down-Pressure Cam (Standard) Row units are mounted on parallel arms.
Page 72 YP4425A Table of Contents Index Adjustments Row Unit Down Pressure Mechanical down-pressure setup is the same for the standard Planter and for a Planter equipped with the optional Row-Pro™ system. For operation of the optional Row-Pro™ system, see separate manual 403-860M. Refer to Figure 74 The ideal amount of down-force causes the side gauge wheels to compress any loose surface soil, but not press...
Page 73 YP4425A Table of Contents Index Adjustments 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 rows. Refer to Figure 78 Cam Notch Pounds...
Page 74 YP4425A Table of Contents Index Adjustments Unit-Mount Row Cleaner Adjustments Refer to Figure 80 and Figure 81 Optional rigid row cleaners are unit-mounted, using: UMRC: Unit-Mount Row Cleaner (stand-alone), or UMC-RC: Unit-Mount Coulter RC (on coulter bracket, with or without a coulter disc present). There are two adjustments: 1.
Page 75 YP4425A Table of Contents Index Adjustments Coulter Adjustments  Coulters are not factory-installed. Check alignment and depth prior to first use. Coulter Depth Adjustment The ideal operating depth for coulters is inch (6 mm) above opener depth. Although they may have originally been set to this depth, coulter (and opener) blades wear with time, and may need adjusting.
Page 76 YP4425A Table of Contents Index Adjustments Coulter Row Alignment Refer to Figure 84 For unit-mounted coulters, the ideal alignment is for the blade to open a furrow directly ahead of the opener discs. As a check on coarse alignment, sight along the coulter blade center-line , the gap between the opener blades...
Page 77 YP4425A Table of Contents Index Adjustments Row-Unit Opener Disk Adjustments 25 Series openers have three adjustments: 1. planting/seed depth 2. opener disk-to-disk clearance 3. gauge wheel/opener disk clearance (page 74) Setting Planting Depth Refer to Figure 86 The T-handle sets planting depth by limiting the how high the side depth gauge wheels ride relative to the opener discs.
Page 78 YP4425A Table of Contents Index Adjustments Side Gauge Wheel Adjustment Side Gauge Side Gauge Refer to Figure 89 and Figure 90 Wheel Wheel Disc-to-wheel angle and clearance ideally has the wheel Opener just touching the disc when the wheel is raised to Discs planting depth (is up against the stop set by the “T”...
Page 79 YP4425A Table of Contents Index Adjustments • If wheel does not fall freely, loosen hex-head bolt and slide wheel arm out just until wheel and arm move freely. Tighten hex-head bolt according to grade: inch Grade 5 bolt, 75 foot-pounds (102 N-m). inch Grade 8 bolt, 110 foot-pounds (149 N-m).
Page 80 YP4425A Table of Contents Index Adjustments Seed Meter Setup and Adjustment There are adjustments for seed inlet, and choice of discs. 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 disc pockets.
Page 81 YP4425A Table of Contents Index Adjustments 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 8:00 be optimal for representative seeds.
Page 82 YP4425A Table of Contents Index Adjustments ® Air-Pro Meter Disk Installation 1. Cross-check Seed Rate Chart data against part number/description molded into disk 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.
Page 83 YP4425A Table of Contents Index Adjustments Removing a Seed Disk Refer to Figure 102 1. Remove rain cover. If seed is present, close shutter to prevent more seed from entering meter. Attach funnel (page 96). 2. Hold seed disk in meter. Rotate disk clamp counterclockwise 45...
Page 84 YP4425A Table of Contents Index Adjustments 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). Sharp Object Hazard: Row unit disc blades may be sharp. Use caution when making ®...
Page 85 YP4425A Table of Contents Index Adjustments 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. Higher press wheel down pressures reduce the down To provide consistent seed firming, the press wheels are force on the main row unit shank components, such as free to move downward from their normal operating the openers.
Page 86 5. Tighten both hex head bolts (View from beneath opener) 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. 2020-12-08 Table of Contents Index 401-805M...
Page 87 YP4425A Table of Contents Index Troubleshooting Planting Rate Problems When starting up with a new planter, a new crop or a new ® For seed monitor issues, see also the DICKEY-john Planter/ population it is important to physically double check what Drill Control User Manuals, the monitor is reporting in the cab by digging seeds.
Page 88 YP4425A Table of Contents Index Troubleshooting Seed Pool Troubleshooting Figure 108 29743 ® Rear Cross-Section of Air-Pro Meter in Normal and Row-Failed Conditions Normal: Normal: Delivery Blockage or Bridging: Bridging: Filling Filled Back-flow Starvation Screen Shutter Seed pool at shutter Once inlet is filled to No seed arriving from Oversize...
Page 89 YP4425A Table of Contents Index Troubleshooting Seed Pool Recovery When a meter has been starved of seed, back-flow of air through the open shutter reduces delivery air flow. This causes seed delivery to be slow. If you start or resume planting with an empty seed pool, the delivery flow may be too low to keep the meter supplied.
Page 90 YP4425A Table of Contents Index Troubleshooting Population Troubleshooting Charts Population Too Low Problem Cause Solution Incorrect seed rate Check seed rate charts Overall Low Population Empty pockets on disc (skips) due to insufficient Methodically increase the controlled air to the meter. See air pressure.
Page 91 YP4425A Table of Contents Index Troubleshooting Population Too Low Problem Cause Solution Shutter opening too wide - interfering with meter Adjust shutter to lower setting. pressurization Population, Single Row Shutter opening too narrow - starving meter of Adjust shutter to higher setting. seed (low seed pool) Y-tube partially or completely closed, reducing Open Y-tube for row...
Page 92 YP4425A Table of Contents Index Troubleshooting Population Too High Problem Cause Solution Incorrect seed rate Check seed rate charts Overall High Population Two seeds per pocket on the disc Methodically decrease the controlled air to the meter. See “Fans” (doubles), due to excess meter on page 61.
Page 93 YP4425A Table of Contents Index Troubleshooting Population Related Problem Cause Solution False alarms or actual rate errors due Overall When troubleshooting population issues, always first rule out seed to monitor setup with incorrect [active] Population monitor setup. Review Planter configuration and monitor setup. row count or spacing Alarms Replace seed discs with correct discs, or reset rate for current discs...
Page 94 YP4425A Table of Contents Index Troubleshooting Seed Delivery Troubleshooting Problem Cause Solution Loosen pipe and spin so the bend is straight Single row doesn’t fill or Y tube is bent/angled off feed pipe. down and Y-tube is not pointing to front or rear of keep up with other rows.
Page 95 YP4425A Table of Contents Index Troubleshooting General Troubleshooting Problem Cause Solution See “Population Troubleshooting Charts” on page 86. Uneven seed spacing 1. Increase field speed. Hydraulic meter drive motor rpm too 2. Use a seed wheel with lower cell count. low for reliable control by proportional valve.
Page 96 YP4425A Table of Contents Index Troubleshooting General Troubleshooting Problem Cause Solution Row-unit plugged with dirt. Clean row-unit. Row-unit discs not turning Planting conditions too wet. Wait until drier weather. freely Incorrect side depth wheel adjustment See “Side Gauge Wheel Adjustment” on page 74. ®...
Page 97 YP4425A Table of Contents Index Troubleshooting General Troubleshooting Problem Cause Solution CFM Switch must be set to “Marker” for Aux to function. Set Auxiliary Marker/Fold switch set to Fold tractor remote circuit to Neutral or Float before switching. Hydraulics Inoperative Selector valve must be set to Aux.
Page 98 YP4425A Table of Contents Index 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.
Page 99 YP4425A Table of Contents Index Maintenance and Lubrication Material Clean-Out When planting is completed, it is commonly the case that some seed remains. There may be seed in the hopper or bulk box, seed in the airbox, a small amount of seed in Entrapment and Rapid Suffocation Hazard: the hose lines, and seed in the meters.
Page 100 YP4425A Table of Contents Index Maintenance and Lubrication Refer to Figure 112 8. If the Planter has Y-tubes, shut off the gates at all of the Y-tubes. 9. Turn on the air fan and let it run. Use the “SPLIT AIR -” softkey to reduce the regulated air pressure to a low value, 1 inch water or less - this diverts most of the air to the bulk seed delivery...
Page 101 This can cause false low population alarms. The Planter includes a seed tube brush (Great Plains part number 891-259C). If the seed meter is empty, remove the seed disc and insert the brush into the seed tube from above.
Page 102 YP4425A Table of Contents Index Maintenance and Lubrication 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 116 A HEPA vacuum cleaner is recommended for brush cleaning.
Page 103 YP4425A Table of Contents Index Maintenance and Lubrication Meter Brush Replacement Consult the Parts manual (401-805P) for current replacement part numbers. Refer to Figure 117 Tufted Brush Replacement 1. Remove and save both 10-24 hex head cap ® screws and Nylock nuts (not shown).
Page 104 YP4425A Table of Contents Index Maintenance and Lubrication Seed Disc Maintenance Refer to Figure 119 When removing seed discs, 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 discs and re-inspect.
Page 105 YP4425A Table of Contents Index Maintenance and Lubrication Air Box Residue Clean-Out Planting in extremely dusty conditions, particularly dusty and humid conditions, or otherwise sticky soils, can lead to air residue build-up inside the airbox. This residue can cause seed delivery blockages. Refer to Figure 120 and Figure 121 (Figure 120 depicts a partially and a completely plugged agitation port, and build-up in the RH plenum chamber)
Page 106 5. Re-set pop-out indicator if necessary. Hydraulic Filter Indicator It is a good idea to keep a filter element on hand, and Great Plains recommends changing filters annually, if not more often. • Between planting seasons, store cab console inside in a relatively stable and dry environment.
Page 107 The shear bolt is a hex head cap screw, -13 x 2 inch Grade 5, Great Plains part number 802-130C, plus -13 lock nut, Great Plains part number 803-019C. Install a replacement shear bolt on the vertical faces on the side opposite from the pivot bolt.
Page 108 YP4425A Table of Contents Index Maintenance and Lubrication Wing Leveling, Inboard End Wing leveling check/adjustment is required prior to first use of the YP4425A Planter, and periodically thereafter, for example, if soil conditions change dramatically. Before performing this operation: • Lower unfolded Planter in soil.
Page 109 YP4425A Table of Contents Index Maintenance and Lubrication Wing Alignment To check and adjust wing alignment: 1. Unfold Planter. See “Unfolding the YP4425A Planter” on page 24. 2. Set tongue height (page 20). Lower Planter. Pull forward. Refer to Figure 128 and Figure 129 3.
Page 110 YP4425A Table of Contents Index Maintenance and Lubrication 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 144. Chain Slack Check slack at fixed idlers within the first 8 hours of operation and tighten idlers as necessary.
Page 111 YP4425A Table of Contents Index Maintenance and Lubrication Spreaders and Scrapers  Applies to all row unit Series.  It is normal for the blade spreader to have some looseness in the holder and between the blades. Refer to Figure 133 Some looseness is required for proper operation.
Page 112 YP4425A Table of Contents Index Maintenance and Lubrication Seed Flap Replacement Refer to Figure 135 To replace an 816-302C 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”...
Page 113 YP4425A Table of Contents Index Maintenance and Lubrication Fertilizer System With proper attention to maintenance, end of day clean-out, end of season clean-out and winterization, you can substantially increase the life and reliability of Possible Chemical Hazard: your fertilizer system. Protect the pump, clean the tanks, Wear proper protective equipment as required by chemical strainers, lines and nozzles, and you can avoid costly manufacturer.
Page 114 YP4425A Table of Contents Index Maintenance and Lubrication Lubrication Intervals (operating hours) Multi-purpose Multi-purpose Multi-pupose Inspection at which service oil lubricant spray lubricant grease lubricant is required Wing Caster: Parallel Arms 29263 One zerk each end of each arm, each wing; 8 total Type of Lubrication: Grease Quantity: Until Grease emerges...
Page 115 YP4425A Table of Contents Index Maintenance and Lubrication Wing Frames 29200 2 zerks; one each wing at wing-frame to tool bar joint Type of Lubrication: Grease Quantity: Until grease emerges Rockshaft to Main Frame 1 zerk each side; 2 total Type of Lubrication: Grease Quantity: Until grease emerges 29320...
Page 116 YP4425A Table of Contents Index Maintenance and Lubrication Lift Cylinders: Rod End 2 zerks, one each inside end of pins, each side Type of Lubrication: Grease Quantity: Until grease emerges 29294 Level Link, Front End 29200 One zerk each link; 2 total Type of Lubrication: Grease Quantity: Until grease emerges...
Page 117 YP4425A Table of Contents Index Maintenance and Lubrication Rear Sub-Frame to Rear Axle 29320 1 zerk each side; 2 total Type of Lubrication: Grease Quantity: Until grease emerges Axle Link: Aft End 29295 One zerk each link; 2 total Type of Lubrication: Grease Quantity: Until grease emerges Level Link, Aft End One zerk each link;...
Page 118 YP4425A Table of Contents Index Maintenance and Lubrication Rear Caster Wheel Pivot 1 zerk each of 2 casters; 2 total Type of Lubrication: Grease Quantity: Until grease emerges 29293 Opener Side Wheel Bushing On both sides of each row-unit Type of Lubrication: Grease Quantity: Until grease emerges 21960 Marker Joints...
Page 119 YP4425A Table of Contents Index Maintenance and Lubrication Hydraulic Drive Chains 29259 As Required 4 chains in mainframe center section 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.
Page 120 YP4425A Table of Contents Index Maintenance and Lubrication Wing Drives As Required 1 chain each wing 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.
Page 121 YP4425A Table of Contents Index Maintenance and Lubrication Hitch Parallel Arms (Hydraulic Tongue only) 4 zerks, 1 each end of each arm Type of Lubrication: Grease Quantity: Until grease emerges 26152 Tongue Latch Pivot 21924 Type of Lubrication: Spray lube Quantity: Coat working surfaces Tongue Slide Roller 26041...
Page 122 YP4425A Table of Contents Index Maintenance and Lubrication Row Cleaner Bearings 1 zerk each wheel, 1 or 2 wheels per row Type of lubrication: Grease Quantity = Until resistance is felt To avoid damaging the seal, do not add grease at high pressure.
Page 123 YP4425A Table of Contents Index Maintenance and Lubrication Transport Wheels: Wheel Hubs Seasonal 8 bearings; 2 each of 4 wheels Type of Lubrication: Grease Quantity: Re-pack Ri ght Hand Si de Gauge Wheel Bearings Seasonal Lef t Hand Si de 29265 4 bearings, 2 each side Type of Lubrication: Grease...
Page 124 YP4425A Table of Contents Index Maintenance and Lubrication 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...
Page 125 YP4425A Table of Contents Index Options Hydraulic Tongue A 3-point hitch is standard on the YP4425A, but a hydraulic tongue may be substituted. Option Packages Part Number Factory-Installed 401-482A Field-Installed 401-483A 26152 Weight Transfer System This option provides two cylinders and a control valve that transfer up to 1000 pounds (450 kg) of mainframe weight to each wing.
Page 126 YP4425A Table of Contents Index Options Low Speed Kit Combinations of narrow row spacings, high cell count or fingers per revolution, low populations and/or low field speed can result in the hydraulic seed meter motor operating at an rpm too low for consistent control by the proportional valve.
Page 127 (which are standard on the PFC1600 For operations, see the Seed Rate manual. and PFC2000 tank carts). Liquid System Configurations Order one each (except where noted) of the parts listed for your configuration. Great Plains Material Supply System Delivery YP4425A YP44 2x200 PFC1600...
Page 128 YP4425A Table of Contents Index Options Type 2 Fertilizer Manifold The Type 2 system includes all plumbing from the rows, through the Planter-mounted ground drive pump, and to the on-board 2x200 gallon tanks. The 407-243A kit extends the inlet to the rear hitch for use with a cart, rather than with on-board tanks.
Page 129 YP4425A Table of Contents Index Options Fertilizer Orifice Plates The manifold systems include size 28, 34 and 48 plates. To order alternate plates, use the following part numbers. Order one per row unit. Orifice Part Port Port Size Number Diameter Area 832-052C 0.020 in...
Page 130 YP4425A Table of Contents Index Options Fertilizer Carts Pull-Type Fertilizer Carts These tank carts were designed for use with the YP4425A Type 3 Fertilizer manifold. The cart’s pump is ® controlled by the DICKEY-john seed monitor on the Planter. The PFC2000 (shown at right) is for use with both Type 2 and Type 3 manifolds.
Page 131 YP4425A Table of Contents Index Options Pintle Trailer Hitch Weldment 29163 This accessory provides a 20 ton pintle hook intended for use with either the PFC1600 or PFC2000 tank carts. Description Order Number Trailer Hitch Weldment 401-467A This kit applies to multiple implements, and includes a step section that is not used on the YP4425A.
Page 132 YP4425A Table of Contents Index Options 82 or 150 Bu. Seed Hopper 82 or 150 bushel (2890 or 5286 liter) hoppers may be purchased with the YP4425A or added later.  The 150 bushel (5286 liter) hopper is incompatible with the liquid fertilizer tank system, as it occupies the space used for the tanks.
Page 133 YP4425A Table of Contents Index Options Seed Lubricant Description Order Number Ezee Glide Plus Talc + Graphite Mix (5 821-069C gallon / 18.9 liter container) See “Changing the Seed Box or Hopper” on page 38. See “Bayer Seed Fluency Agent” on page 120. 29248 Null4: USB-CANbus Adaptor...
Page 134 EGNOS, ® MSAS, OmniSTAR , RTK, VBS, WASS or XP. ® ® Great Plains also offers Trimble AgGPS receivers and RTK solutions. See Options in the Swath Command™ Operator manual (403-857M) for ordering information. Rigid Row Cleaners Optional rigid row cleaners are unit-mounted, either: •...
Page 135 YP4425A Table of Contents Index Options Unit-Mounted Disc Coulters Optional unit-mount disc coulters are available with 15 inch (38.1 cm) fluted blades or 15 inch turbo blades. If you need complete coulters, with unit mount and blade, the selection includes: 15 inch Packages Part Number Set of 24, fluted...
Page 136 YP4425A Table of Contents Index Options Inside Disc Scrapers When planting in moist or sticky soils, these scrapers are useful in preventing build-up that might otherwise impair opener disc performance. Part Description Number Inside Scraper 122-278S ® This scraper cannot be used with Seed-Lok Seed Firmers installed.
Page 137 YP4425A Table of Contents Index Options Seed Meter Disks ® Air-Pro meters accept a variety of seed disks, each optimized for specific seeds, plus a special blank disk for row shut-off. Discs are simple to change. Choices include: Part Number Meter Discs Blank, 0 Cell 817-841C...
Page 138 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 81. 29331...
Page 139 YP4425A Table of Contents Index Appendix A - Reference Information Specifications and Capacities Model YP4425A--2422 Row Count Row Spacing 22 inches (55.9 cm) Working Width 39 feet 7 inches (12.1 m) Span (width between end rows) 506 inches (1285.2 cm) Swath (Channel Width) 528 inches (1341.1 cm) Seed Capacity...
Page 140 YP4425A Table of Contents Index Appendix A - Reference Information Torque Values Chart Bolt Head Identification Bolt Head Identification Bolt Bolt 10.9 Size Size Grade 2 Grade 5 Grade 8 Class 5.8 Class 8.8 Class 10.9 ft-lb ft-lb ft-lb ft-lb ft-lb in-tpi ft-lb...
Page 141 YP4425A Table of Contents Index Appendix A - Reference Information Hydraulic Diagrams Fold, Marker, and Auxiliary Hydraulics (standard) 29808 2020-12-08 Table of Contents Index 401-805M...
Page 142 YP4425A Table of Contents Index Appendix A - Reference Information Auxiliary Hydraulics (with Markers deleted) 29245 To Tractor 2020-12-08 Table of Contents Index 401-805M...
Page 143 YP4425A Table of Contents Index Appendix A - Reference Information Fan Hydraulics (S/N C1003K-) 29631 2020-12-08 Table of Contents Index 401-805M...
Page 144 YP4425A Table of Contents Index Appendix A - Reference Information Fan Hydraulics (S/N C1004K+) 29631 2020-12-08 Table of Contents Index 401-805M...
Page 145 YP4425A Table of Contents Index Appendix A - Reference Information Hydraulic Drive (standard) 29218 2020-12-08 Table of Contents Index 401-805M...
Page 146 YP4425A Table of Contents Index Appendix A - Reference Information Hydraulic Tongue (Option) i c s a u l y d r i f t h T o L b a s i c s a u l y d r i f t h e n d T o L...
Page 147 YP4425A Table of Contents Index Appendix A - Reference Information Lift Hydraulics (standard) t o r r a c T o T 29217 2020-12-08 Table of Contents Index 401-805M...
Page 148 YP4425A Table of Contents Index Appendix A - Reference Information Chain Routing Legend: Sprocket or idler Tooth count Chain Pitch count Direction of chain in motion Hydraulic Drive Chain Routing 29259 2020-12-08 Table of Contents Index 401-805M...
Page 149 YP4425A Table of Contents Index Appendix A - Reference Information Wing Drive Chain Routing 29261 2020-12-08 Table of Contents Index 401-805M...
Page 150 YP4425A Table of Contents Index Appendix A - Reference Information 25AP Final Meter Drive Legend: Sprocket or idler Tooth count Chain Pitch count Direction of chain in motion 29621 29620 25AP: Meter Drive (Mid type) 25AP: Meter Drive (Long type) be sure to reconnect idler spring be sure to reconnect idler spring ...
Page 151 YP4425A Table of Contents Index Appendix A - Reference Information Fertilizer Pump Ground Drive Chain Routing (Optional) 28417 28416 JohnBlue Pump Ground Drive JohnBlue Pump Ground Drive Lower Drive Chain Upper Drive Chain 2020-12-08 Table of Contents Index 401-805M...
Page 152 YP4425A Table of Contents Index Appendix A - Reference Information Seed Hose Routing Mechanical Routing, Left Side .eps 100% 29305 2020-12-08 Table of Contents Index 401-805M...
Page 153 YP4425A Table of Contents Index Appendix A - Reference Information Connections, 16-Port Air Box, Left Facing forward/left, with Planter folded. 24 Row: YP4425A-2422 RACK AIR BOX GUIDES RACK 29298 Section Left Wing Left Center Air Box Ctr Guide Wing Guide Rack Tube Y-Tube Row Unit...
Page 154 Index Appendix B - Initial and Option Setup Pre-Delivery Items These items are normally completed by the Great Plains dealer prior to releasing the implement to the customer. Install Upper Marker Components Marker disks and end tubes are removed for shipping.
Page 155 YP4425A Table of Contents Index Appendix B - Initial and Option Setup Initial Setup These items may not be dealer-installed or dealer- configured unless prior arrangements have been made. Seed Monitor Console Installation The Planter’s standard seed monitor system includes a virtual terminal and switch panel that must be mounted in ®...
Page 156 YP4425A Table of Contents Index Appendix B - Initial and Option Setup Marker Extension Overhead Sharp Object Hazard: You may be injured if hit by a folding or unfolding marker. Markers may fall quickly and unexpectedly if the hydraulics fail. Never allow anyone near the Planter when folding or unfolding the markers.
Page 157 2. Refer to Figure 38 on page 36, or Figure 39 on page 37 placement elevations based remaining hopper capacity. Great Plains suggests mounting the sensor on the lower front wall of the hopper. ® 3. Follow the steps in DICKEY-john instruction sheet 11001-1126 to install the sensor.
Page 158 YP4425A Table of Contents Index Appendix C - Option Installation 122-278S Scraper Installation Optional carbide disk scrapers are not factory installed. Start with row 1 (left-most row unit). ®  If a Keeton seed firmer is also installed, see the Parts Manual for assembly details.
Page 159 YP4425A Table of Contents Index Appendix C - Option Installation Low Speed Kit Installation (402-520A) 1. Shut off any hydraulic source that powers the hydraulic seed meter drives (dedicated remotes or PTO). 2. At the hydraulic drive motor, loosen the idler nut Slide the idler out of engagement with the existing chain .
Page 160 Second year limited warranty covers Parts ONLY (personal usage only, excluding labor and wear items). This warranty is limited to the replacement of any defective part by Great Plains. Great Plains reserves the right to inspect any equipment or part which are claimed to have been defective in material or workmanship.
Page 161 YP4425A Table of Contents Index Appendix C - Option Installation 2020-12-08 Table of Contents Index 401-805M...
Page 162 YP4425A Cover Table of Contents Index center section level ......103 DICKEY-john ......126 centering, press wheel ....... 81 manual .........12 ABS ............96 CFM ..18 User Level 1 ........12 adding seed ......... 36 User Level 2 ........12 adjustments ........57 chain clip .......... 106 directions ..........12 AgGPS®...
Page 163 YP4425A Cover Table of Contents fertilizer tank ........125 hydraulic drive chain ......144 liquid fertilizer tank system ....128 fertilizer tank cart ........49 hydraulic drive maintenance .... 102 liquid seed treatment ....36 FIELD .......... 30 hydraulic flow ........43 local float, hydraulic tongue ....28 field operation ........52 hydraulic safety ........
Page 164 YP4425A Cover Table of Contents owner assistance ........13 respirator ..........48 shipping link ........15 return line, fan ........42 shutdown ..........4 reverse fan ......... 42 shut-off, row ........76 paint ............56 reverse operations, tank ....49 shutter.......... 47 parallel arms ........67 re-zero, sensor ........
Page 165 YP4425A Cover Table of Contents towing vehicle capability .....32 tractor cab ........151 yaw ........... 105 tractor movement, during unfolding ..24 YP2425A-2422 ......... 135 trailer hitch weldment .......127 YP4425A ..........12 trailer operations .........49 YP4425A-2422 ........12 train, defined ........32 y-tubes .........84 transport ..........30 Numerics transport locks ......
Page 166 Table of Contents Index Table of Contents Index...
Page 167 Great Plains, Mfg. 1525 E. North St. P.O. Box 5060 Salina, KS 67402...

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