Operator s Manual. Manufacturing, Inc. Three-Point Drill. 2400, 2410 and 2420 PURPLE M

Transcription

1 PURPLE Operator s Manual 2400, 2410 and 2420 Three-Point Drill Manufacturing, Inc. 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! Cover illustration may show optional equipment not supplied with standard unit. Copyright 1999 Printed 5/15/ M

2 Table of Contents Great Plains Mfg., Inc. Table of Contents Important Safety Information Personal Safety Equipment Safety Decals Introduction Description of Unit Intended Usage Using This Manual Definitions Owner Assistance Section 1 Preparation and Setup Prestart Checklist Hitching Tractor to Drill Hydraulic Hookup Leveling Drill Model Models 2410 and Section 2 Operating Instructions Prestart Checklist Opener Operation Marker Operation Shaft Monitor Operation Transporting Transporting with Markers Parking Section 3 Adjustments Seeding Depth Models 2400 and Model Opener Down Pressure Opener Depth Frame Height Seeding Rate Adjust Drive Sprockets Set Seed-Rate Handle Position Seed-Cup Doors Check Seeding Rate Seed Rate Charts Marker Adjustments Folding Speed with Needle Valves Folding Speed with Sequence Valve Transport Carrier Marker Chain Disk Adjustment Bleeding Marker Hydraulics Disk Scraper Adjustment Seed-Lok Lock Up Section 4 Troubleshooting Section 5 Maintenance and Lubrication Maintenance Drive System Marker Maintenance Drive Chains Gauge Wheel Arm Pivots Lubrication Seed-Cup-Shaft Sprocket Wheel Bearings Marker Hinge Points Marker Disk Bearings Storage Section 6 Options Markers Parking Stand Rear Mount Boom Seed-Cup Plugs Shaft Monitor Seed-Lok Firming Wheels Seed-Lok Firming Wheels Weight Bracket Section 7 Specifications and Capacities Appendix Tire Inflation Chart Torque Values Chart for Common Bolt Sizes Warranty Copyright 1999 All rights Reserved Great Plains Manufacturing, Inc. provides this publication as is without warranty of any kind, either expressed or implied. While every precaution has been taken in the preparation of this manual, Great Plains Manufacturing, Inc. assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein. Great Plains Manufacturing, Inc. reserves the right to revise and improve its products as it sees fit. This publication describes the state of this product at the time of its publication, and may not reflect the product in the future. Great Plains Manufacturing, Incorporated Trademarks The following are trademarks of Great Plains Mfg., Inc.: Application Systems, Ausherman, Land Pride, Great Plains, Seed-Lok All other brands and product names are trademarks or registered trademarks of their respective holders. Printed in the United States of America. 2400, 2410 and 2420 Three-Point Drill M 5/15/06

3 Great Plains Mfg., Inc. Important Safety Information 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. The signal words are:! 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. For Your Protection Thoroughly read and understand Safety Labels, page 5. Read all instructions noted on the labels. Keep Riders Off Machinery Riders obstruct the operator s view. They could be struck by foreign objects or thrown from the machine. Never allow children to operate equipment. OFF Shutdown and Storage Lower machine to ground, put tractor in park, turn off engine, and remove the key. Detach and store implements in a area where children normally do not play. Secure implement by using blocks and supports. 5/15/ , 2410 and 2420 Three-Point Drill M 1

4 Important Safety Information Great Plains Mfg., Inc. Use Safety Lights and Devices Slow-moving tractors, self-propelled equipment 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 20 mph. Some rough terrains require a slower speed. Sudden braking can cause a towed load to swerve and upset. Do not exceed 20 mph. Never travel at a speed which does not allow adequate control of steering and stopping. Reduce speed if towed load is not equipped with brakes. Comply with state and local laws. Do not tow an implement that, when fully loaded, weighs more than 1.5 times the weight of towing vehicle. Use A Safety Chain Use a safety chain to help control drawn machinery should it separate from tractor drawbar. Use a chain with a strength rating equal to or greater than the gross weight of towed machinery. Attach chain to tractor drawbar support or other specified anchor location. Allow only enough slack in chain to permit turning. Replace chain if any links or end fittings are broken, stretched or damaged. Do not use safety chain for towing. 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 implement to ground, put tractor in park, turn off engine, and remove key before performing maintenance. Allow implement to cool completely. 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 implement before operation , 2410 and 2420 Three-Point Drill M 5/15/06

5 Great Plains Mfg., Inc. Important Safety Information 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. 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. Because operating equipment safely requires your full attention, avoid wearing radio headphones while operating machinery. Avoid High Pressure Fluids Hazard Escaping fluid under pressure can penetrate skin, causing serious injury. Avoid the hazard by relieving pressure before disconnecting hydraulic lines. Use a piece of paper or cardboard, NOT BODY PARTS, to check for suspected leaks. Wear protective gloves and safety glasses or goggles when working with hydraulic systems. If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. 911 Safety at All Times Thoroughly read and understand this manual before operating implement. Refer to Safety Decals, page 4. Read all instructions noted on decals. Be familiar with all implement functions. Operate implement from driver s seat only. Do not leave tractor or implement unattended with engine running. Do not dismount a moving tractor. Dismounting a moving tractor could cause serious injury or death. Do not stand between the tractor and implement 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 raising implement. Make sure all persons are clear of working area. Do not turn tractor too tight, causing towed implements to ride up on wheels. Never stand on or use tires as a step. Tires not in contact with the ground will rotate easily. Keep bystanders well away when folding markers. Falling or folding markers can crush bystanders. Tire Safety Tire maintenance can be dangerous and should be performed by trained personnel using correct equipment. Inflate tires to proper pressure and torque wheel bolts as recommended in Appendix, page 34. When inflating tires, use a clip-on chuck and extension hose long enough to allow 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. 5/15/ , 2410 and 2420 Three-Point Drill M 3

6 Important Safety Information Great Plains Mfg., Inc. Handle Chemicals Properly Read and follow chemical manufacturer s 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. Before adding chemical to the tank, make sure tank is at least half full. Do not pour concentrate into an empty tank. Never leave fill hose attached to the sprayer after filling tank. Chemicals in tank can siphon out of tank and contaminate freshwater source. Always keep clean water and soap available in case of an emergency. Immediately and thoroughly flush any area of the body that is contaminated by chemicals. Do not touch boom components with mouth or lips. 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 spraying is completed for the day. Spray only with acceptable wind conditions. Wind speed must be below 5 mph. Make sure wind drift of chemicals will not affect any surrounding land, people or animals. Never wash out the sprayer tank within 100 feet of any freshwater source or in a car wash. Rinse out sprayer tank. Spray rinse water on last field sprayed. Personal Safety Equipment Great Plains advises all users of chemical pesticides or herbicides to use the following personal safety equipment. Always follow the chemical label instructions. Operator safety and the effectivity of the product depends upon operator actions. Cartridge-type respirator approved for pesticide vapors unless label specifies another type of respirator. Waterproof, unlined gloves. Neoprene gloves are recommended. Waterproof, wide-brimmed hat Waterproof apron Cloth coveralls/outer clothing changed daily; waterproof items if there is a chance of becoming wet with spray 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 or if being exposed to spray mist. Waterproof boots or foot coverings , 2410 and 2420 Three-Point Drill M 5/15/06

7 Great Plains Mfg., Inc. Important Safety Information Safety Decals Your implement comes equipped with all safety decals in place. They were designed to help you safely operate your implement. 1. Read and follow decal directions. 2. Keep all safety decals clean and legible. 3. Replace all damaged or missing decals. Order new decals from your Great Plains dealer. Refer to this section for proper decal placement. 4. When ordering new parts or components, also request corresponding safety decals. 5. To install new decals: a. Clean the area on which the decal is to be placed. b. Peel backing from decal. Press firmly on surface, being careful not to cause air bubbles under decal C Slow Moving Vehicle Sign C Red Reflector Reflector on both ends of drill; two reflectors total /15/ , 2410 and 2420 Three-Point Drill M 5

8 Important Safety Information Great Plains Mfg., Inc C Amber Reflector Reflectors on both ends of drill; four reflectors total C Warning 20MPH Trans Decal on frame tube near drill center C Warning High Pressure SML Decal on frame tube near drill center , 2410 and 2420 Three-Point Drill M 5/15/06

9 Great Plains Mfg., Inc. Important Safety Information C Caution Tires Not a Step Decals on frame tube near gauge wheels; two decals total C Caution Operational Decal on frame tube near drill center C Danger Crush Tractor & Three Point Decal on frame tube near drill center 5/15/ , 2410 and 2420 Three-Point Drill M 7

10 Important Safety Information Great Plains Mfg., Inc C Caution Tire 36 PSI Decals on wheel rims; four decals total C Warning Pinch/Crush Marker Two decals on first section of each optional marker; four decals total , 2410 and 2420 Three-Point Drill M 5/15/06

11 Great Plains Mfg., Inc. Introduction Introduction Great Plains welcomes you to its growing family of new product owners. This implement 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. Description of Unit The 2400, 2410 and 2420 model drills are mounted seeding implements. The drills are equipped with either straight-arm (00 Series), parallel-arm (10 Series) or side-depth-control (20 Series) openers. The openers are staggered for easy residue flow. Opener depth can be adjusted. Drill-box capacity is 57.6 bushels, and the seeding rate can be adjusted from 2 to 240 pounds per acre. Intended Usage Use the drill to seed production-agriculture crops only. Do not modify the drill for use with attachments other than Great Plains options and accessories specified for use with the drill. 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. 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. IMPORTANT: A crucial point of information related to the preceding topic. For safe and correct operation, read and follow the directions provided before continuing. NOTE: Useful information related to the preceding topic. Owner Assistance If you need customer service or repair parts, contact a Great Plains dealer. They have trained personnel, repair parts and equipment specially designed for Great Plains products. Your machine s parts were specially designed and should only be replaced with Great Plains parts. Always use the serial and model number when ordering parts from your Great Plains dealer. The serial-number plate is located on the main frame tube on the left end of the drill as shown in Figure A. Figure A Serial Number Record your drill model and serial number here for quick reference: Model Number: Serial Number: Your Great Plains dealer wants you to be satisfied with your new 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 not satisfied, seek out the owner or general manager of the dealership. 3. For further assistance write to: Product Support Great Plains Mfg. Inc., Service Department PO Box 5060 Salina, KS /15/ , 2410 and 2420 Three-Point Drill M 9

12 Section 1 Preparation and Setup Great Plains Mfg., Inc. Section 1 Preparation and Setup This section will help you prepare your tractor and drill for use. Before using the drill in the field, you must hitch the drill to a suitable tractor (see Tractor Requirements, Specifications and Capacities, page 33) and level the drill. Prestart Checklist 1. Read and understand Important Safety Information, page Check that all working parts are moving freely, bolts are tight, and cotter pins are spread. 3. Check that all grease fittings are in place and lubricated. Refer to Lubrication, Maintenance and Lubrication, page Check that all safety decals and reflectors are correctly located and legible. Replace if damaged. See Safety Decals, Important Safety Information, page Inflate tires to pressure recommended and tighten wheel bolts as specified. See Appendix, page 34. Hitching Tractor to Drill! DANGER You may be severely injured or killed by being crushed between the tractor and drill. Do not stand or place any part of your body between drill and moving tractor. Stop tractor engine and set park brake before installing pins. 1. Raise or lower tractor three-point arms as needed and pin lower arms to drill. 2. Pin upper arm to drill. For category III tractors, install hitch pin in the lower hole. For category IV-N tractors, install hitch pin in the upper hole. 3. Slowly raise drill. Watch for cab interference. 4. If using optional parking stands, unpin stand tubes. Rotate stands up into field position and repin. See Figure Adjust top three-point link so that top edge of drill box is parallel with ground when drilling. NOTE: Do not use link to adjust opener depth. For opener adjustments, refer to Opener Down Pressure and Opener Depth, Adjustments, starting on page Set your tractor three-point-draft control to float position. 7. Plug lead from drill light harness into tractor receptacle. Hydraulic Hookup! WARNING Escaping fluid under pressure can have sufficient pressure to penetrate the skin. Check all hydraulic lines and fittings before applying pressure. Fluid escaping from a very small hole can be almost invisible. Use paper or cardboard, not body parts, and wear heavy gloves to check for suspected leaks. If injured, seek medical assistance from a doctor that is familiar with this type of injury. Foreign fluids in the tissue must be surgically removed within a few hours or gangrene will result. Great Plains hydraulic hoses are coded to help you hookup to your tractor outlets. To distinguish hoses on the same hydraulic circuit, refer to plastic hose holder. See Figure 1-2. Connect hose under extended cylinder to outlet you choose for cylinder extension. Connect hose under retracted symbol to outlet for cylinder retraction Figure 1-2 Hydraulic Hose Color Ties Figure 1-1 Parking Stand , 2410 and 2420 Three-Point Drill M 5/15/06

13 Great Plains Mfg., Inc. Section 1 Preparation and Setup Leveling Drill Model 2400 Initially adjust drill so opener tube runs 18 1/4 inches above ground when drill is lowered in field. See Figure After adjusting both turnbuckles to same length, tighten jam nuts. 5. Level drill with top three-point link. When drill is level, the gap between the spring-rod casting and the cross bolt will be about 2 inches. See Figure 1-5. This is a general dimension that will vary with the amount of down pressure required for your planting conditions. Figure 1-3 Initial Operating Height To adjust: 1. Loosen jam nut near top clevis of each gauge-wheel turnbuckle. Refer to Figure 1-4. NOTE: Jam nut is left-hand threaded. 2. Bolt upper clevis in upper mount hole as shown in Figure Set turnbuckle length. Turn turnbuckle to shorten or lengthen as necessary. Initially set length to 17 3/16 inches between pin centers to achieve the 18 1/4-inch dimension mentioned above. When adjusting turnbuckle, remember: Lengthening turnbuckle raises drill. Shortening turnbuckle lowers drill. Figure 1-5 Normal Spring Rod Setting Jam Nut Figure 1-4 Gauge-Wheel Turnbuckle, Straight Arm Openers 5/15/ , 2410 and 2420 Three-Point Drill M 11

14 Section 1 Preparation and Setup Great Plains Mfg., Inc. Models 2410 and 2420 Initially adjust drill so opener tube runs 21 inches above ground when drill is lowered in field. See Figure After adjusting both turnbuckles to the same length, tighten jam nuts. 5. Level drill with top three-point link. When drill is level, opener tube will be higher than opener body with parallel links running slightly uphill. See Figure 1-8. The 1- to 1 1/2-inch dimension shown in Figure 1-8 is a general dimension that will vary with planting conditions Figure 1-6 Initial Operating Height To adjust: 1. Loosen jam nut (1) near top clevis of each gaugewheel turnbuckle. Refer to Figure 1-7. NOTE: Jam nut is left-hand threaded. 2. Bolt upper clevis in lower hole as shown in Figure Set turnbuckle length. Turn turnbuckle to shorten or lengthen as necessary. Initially set length to 17 9/16 inches between pin centers to achieve the 21-inch dimension mention above. When adjusting the turnbuckle length, remember: Lengthening turnbuckle raises drill. Shortening turnbuckle lowers drill. Figure 1-8 Leveling the Drill IMPORTANT: Make sure the opener mount is running higher than the opener body. This will ensure an ample reserve for opener upfloat in case the opener strikes a rock or other object Figure 1-7 Gauge Wheel Turnbuckle, Parallel-Arm Openers , 2410 and 2420 Three-Point Drill M 5/15/06

15 Great Plains Mfg., Inc. Section 2 Operating Instructions Section 2 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. Prestart Checklist 1. Carefully read Important Safety Information, page Lubricate drill as indicated under Lubrication, Maintenance and Lubrication, page Check all tires for proper inflation as indicated on Tire Inflation Chart, Appendix, page Check all bolts, pins and fasteners. Torque as specified on Torque Values Chart, Appendix, page Check drill for worn or damaged parts. Repair or replace parts before going to the field. 6. Check hydraulic hoses, fittings and cylinders for leaks. Repair or replace before going to the field. 7. Check disk scrapers for proper adjustment. Refer to Disk Scraper Adjustment, Adjustments, page Rotate both gauge wheels to see that seed cups and drive are working properly and free from foreign material. Field Operation! DANGER You may be severely injured or killed by being crushed between the tractor and drill. Do not stand or place any part of your body between drill and moving tractor. Stop tractor engine and set park brake before installing pins.! WARNING Escaping fluid under pressure can have sufficient pressure to penetrate the skin. Check all hydraulic lines and fittings before applying pressure. Fluid escaping from a very small hole can be almost invisible. Use paper or cardboard, not body parts, and wear heavy gloves to check for suspected leaks. If injured, seek medical assistance from a doctor that is familiar with this type of injury. Foreign fluids in the tissue must be surgically removed within a few hours or gangrene will result. 1. Hitch drill to a suitable tractor. Refer to Hitching Tractor to Drill, Preparation and Setup, page Set and calibrate the seeding rate as explained under Seeding Rate, Adjustments, page Load box with clean seed. 4. Record acremeter readout. Subtract initial reading from later readings to determine acres drilled. 5. Pull forward, lower drill and begin seeding. 6. Always lift drill out of the ground when turning at row ends and for other short-radius turns. Seeding will stop automatically as drill is raised. Opener Operation Never back up with openers in ground. If you do, check all openers to be sure none are clogged or damaged. For information on opener adjustments, refer to Opener Down Pressure and Opener Depth, Adjustments, starting on page 15. For more information on troubleshooting opener problems, see Troubleshooting, page 26. Marker Operation Optional marker attachments are available from your Great Plains dealer. Before operating markers, make sure hydraulics are properly bled as described under Marker Adjustments, Adjustments, page 24. Dual markers equipped with a sequence valve are powered off the same hydraulic circuit. Starting with both markers folded, the folding sequence is: 1. Activate lever Right unfolds; left stays folded. 2. Reverse lever Right folds up; left stays folded. 3. Activate lever Left unfolds; right stays folded. 4. Reverse lever Left folds up; right stays folded. 5. Sequence repeats. You can adjust marker folding speed. Refer to Marker Adjustments, Adjustments, page 24, and adjust folding speed to a safe rate. Folding markers at high speed can damage markers. Shaft Monitor Operation To operate the optional shaft monitor, activate system by flipping on-off switch on monitor head. If a seed-cup shaft stops for 30 seconds or more, an alarm will sound and a light on the monitor will flash. The 30-second delay is to prevent nuisance alarms when turning at the end of the field. If a failure does occur and the alarm sounds, remember you have traveled for 30 seconds without planting. 5/15/ , 2410 and 2420 Three-Point Drill M 13

16 Section 2 Operating Instructions Transporting! WARNING Towing the drill at high speeds or with a vehicle that is not heavy enough could lead to loss of vehicle control. Loss of vehicle control could lead to serious road accidents, injury and death. To reduce the hazard, do not exceed 20 mph. Check that your tractor has enough ballast to handle the weight of the drill. Refer to your tractor operator s manual for ballast requirements. Great Plains Mfg., Inc. 3. Lower three-point hitch until drill is on ground. 4. Extend or retract the top link of the tractor until top three-point pin is free. Remove pin. 5. Remove pins from lower links. Before transporting the drill, follow and check these items. Unload drill box. The drill can be transported with a full box of grain, but the added weight will increase stopping distance and decrease maneuverability. Unload drill box before transporting if at all possible. NOTE: To maintain steering control, you may need to add ballast to your tractor front end. Refer to your tractor operator s manual for ballast required. Road rules. Comply with all federal, state and local safety laws when traveling on public roads. Clearance. Remember that the drill is wider than the tractor. Allow safe clearance. Transporting with Markers Always transport markers in the folded position. Parking See Storage, Maintenance and Lubrication, page 30 for additional information on long-term storage. 1. Park drill on a level, solid area. 2. Unpin and rotate optional parking stands down into parking position. Replace pins as shown in Figure 2. If ground is soft, place a board or plate under stands to increase contact area Figure 2 Optional Parking Stand , 2410 and 2420 Three-Point Drill M 5/15/06

17 Great Plains Mfg., Inc. Section 3 Adjustments Section 3 Adjustments Seeding Depth The three-point drill has double-disk openers with press wheels. The following is an explanation to how the openers work. Models 2400 and 2410 Down Pressure: Opener springs provide the down pressure necessary for opener disks to open a seed trench. The springs allow openers to float down into depressions and up over obstructions. Seeding Depth: A press wheel attached to each opener body controls seeding depth. To maintain consistent depth, the relationship between the bottom of the opener disks and press wheel is fixed upwardly by an adjustable stop on each opener. The position of the adjustable stop determines seeding depth. Raising the stop increases seeding depth. Lowering the stop decreases seeding depth. Soil Firming: The press wheels also close the seed trench and gently press soil over seed. To provide consistent soil firming, press wheels are free to move down from normal operating position. This maintains pressing action even if opener disks encounter obstructions or hard soil. Model 2420 Down Pressure: Opener springs provide the down pressure necessary for opener disks to open a seed trench. The springs allow the openers to float down into depressions and up over obstructions. Seeding Depth: Side depth wheels on the opener disks gauge opener seeding depth. The position of the adjustable stop determines seeding depth. Raising the stop raises the side depth wheels and increases seeding depth. Lowering the stop lowers the side depth wheels and decreases seeding depth. Soil Firming: Press wheels are attached to each opener body. The press wheels close the seed trench and gently press soil over seed. An adjustable spring in the presswheel mechanism creates the down pressure needed to close the seed trench. Opener Down Pressure You can adjust down pressure individually for each opener. This is useful for penetrating hard soil and planting in tire tracks. Use only enough down pressure to cut the seed trench and maintain proper soil-firming over seed. Excessive opener down force will lead to premature wear on opener components To adjust down pressure, remove the W clip from spring rod. Put clip in a higher hole for more pressure or in a lower hole for less pressure as shown in Figure Maximum Pressure Figure 3-1 Opener Spring Adjustment, 00 Series Openers 2410 To adjust down pressure, use adjustment tool stored under walkboard. Position tool in holes on spring mounting plates. Pull down on adjuster as shown Figure 3-2. Move the adjustment cam to the new setting. Figure 3-2 Opener Spring Adjustment, 10 Series Openers Minimum and maximum settings are indicated by position of adjustment cam. See Figure 3-3. Minimum Force Minimum Pressure Figure 3-3 Adjustment Cam Maximum Force 5/15/ , 2410 and 2420 Three-Point Drill M 15

18 Section 3 Adjustments Great Plains Mfg., Inc To adjust down pressure, raise drill. Refer to Figure 3-4. Use a crowbar or other lever to lift spring plate (1) off removable pin (2). Remove pin, then move spring plate to a new position. Replace pin to hold spring plate in its new position. To adjust, move adjustment lever shown in Figure 3-6. For less down pressure, move handle forward toward drill. For more down pressure, move handle back away from drill Figure 3-4 Opener Spring Adjustment, 20 Series Openers Move spring plate forward to decrease down pressure. Move spring plate back to increase spring pressure. Figure 3-5 shows maximum and minimum spring settings. Figure 3-6 Press Wheel Adjustment, 20 Series Openers Opener Depth Set opener seeding depth by adjusting T-handles. To adjust, first raise openers slightly, then lift and slide T-handles on top of openers as shown in Figure 3-7. Adjust all T- handles to the same setting. For shallower seeding, slide T-handles forward toward drill. For deeper seeding, slide T-handles back away from drill Maximum Pressure Minimum Pressure Figure 3-5 Spring Pressure, 20 Series Openers A spring in the press-wheel mechanism creates down pressure on the press wheels. The amount of force needed to close the seed trench will vary with field conditions Figure 3-7 Opener Depth , 2410 and 2420 Three-Point Drill M 5/15/06

19 Great Plains Mfg., Inc. Section 3 Adjustments Frame Height Drill operating height directly affects the working range of the drill openers. Initially adjust frame height as explained under Leveling Drill, Preparation and Setup, page 11. You can make further adjustments to compensate for field conditions. When adjusting the gauge-wheel turnbuckles, remember: Lengthening turnbuckles raises drill and allows less opener down float. Shortening turnbuckles lowers drill and allows less opener up float. After adjusting gauge-wheel turnbuckles, be sure to level the drill with top hitch link. NOTE: Lowering the drill increases the risk of opener damage on rocks or obstructions. Seeding Rate Calibrating the seeding rate requires four steps: adjusting drive sprockets, setting seed-rate handle, positioning seed-cup doors, and checking seeding rate. Refer to the seed-rate charts on page 19. These charts list proper sprocket sizes and seed-rate-handle settings for various seeds and seeding rates. The seed-rate charts are based on cleaned, untreated seed of average size and test weight. The charts are based on 11L x 15, rib implement tires. Many factors will affect seeding rates including foreign material, seed treatment, seed size, seed weight, field conditions and tire pressure. You likely will need to make minor adjustments. Set and check the seeding rate, then readjust the rate as necessary. Before setting the seeding rate, rotate the gauge wheels. Check that seed cups and drive are working properly and free from foreign material. Adjust Drive Sprockets Use drive sprockets for the drive type for your desired seeding rate. See Figure 3-8. Figure 3-8 Drive Sprockets For correct drive type, refer to seed-rate charts beginning on page 19. The charts lists drive types as 1, 2, 3 or 4. Refer to the following table for correct-sized sprocket for each drive type. Drive Type Driver Driven Speed Type 1 15 Tooth 47 Tooth Slowest Type 2 24 Tooth 36 Tooth Two Times Faster Than Type 1 Type 3 24 Tooth 24 Tooth Three Times Faster Than Type 1 Type 4 24 Tooth 15 Tooth Five Times Faster Than Type 1 5/15/ , 2410 and 2420 Three-Point Drill M 17

20 Section 3 Adjustments Great Plains Mfg., Inc. To change drive sprockets, refer to Figure 3-9. Loosen idler plate (1) and remove drive chain (2). Remove lynch pins from shafts and rearrange driver (3) and driven (4) sprockets as necessary. Reroute drive chain over sprockets and idlers as shown in Figure 3-9. Be sure chain is installed with the chain connector link retainer towards the centerline and the clip opening (split end) faces the opposite way of the chain travel. Move idlers into chain so chain has 1/4-inch slack in its longest span. Tighten idlers. Position Seed-Cup Doors For wheat and other small seeds, move seed-cup-door handles to highest position. For soybeans and other large seeds, lower handles to second position. If excessive seed cracking occurs, lower handles to third position. For seedcup clean out, move handles to fourth, wide-open position. Make sure all handles are in same position before drilling Figure 3-11 Seed-Cup-Door Handle Figure 3-9 Driver and Driven Sprockets Set same drive type on both drill sections. Set Seed-Rate Handle Position seed-rate handle for each drill box to setting indicated on seed-rate chart. One handle is shown in Figure To adjust seed-rate handle, loosen wing nut under handle. Slide handle until indicator is just past the correct setting, then move the handle back down to the correct setting. Retighten wing nut. Figure 3-10 Seed-Rate Handle Check Seeding Rate 1. Record the weight of an empty container large enough to hold seed metered for one acre. 2. Place several pounds of seed over three seed cups on an outside end of drill box. Pull seed tubes off these three openers. 3. Raise drill off ground. 4. Turn gauge wheel a few turns to fill cups with seed. Turn wheel until seed drops to ground from all three cups. 5. Place a container under the three seed tubes to gather seed as it is metered. 6. Turn drive gauge wheel 233 revolutions. Check that three seed cups have plenty of seed coming into them. 7. Weigh metered seed. Subtract initial weight of empty container. Divide by three for the amount metered by each seed cup, then multiply by the number of drill openers for the pounds-per-acre seeding rate. If this figure is different than desired, adjust the seed-rate handle and recheck the rate. NOTE: If your results vary greatly from the charts, you may want to repeat the calibration procedure. 8. When drilling, note acres drilled, amount of seed added and level of seed in drill box. If you are seeding more or less than desired, adjust seeding rate slightly to compensate for your field conditions , 2410 and 2420 Three-Point Drill M 5/15/06

21 Great Plains Mfg., Inc. Section 3 Adjustments Seed Rate Charts Seed-Rate-Handle Setting Alfalfa or Rape 6" 7" Drive Type 1 7.5" (Based on 60#/ bu) 8" " Barley Drive Type 1 (Based on 51#/bu) 6" " " " " Barley Drive Type 2 (Based on 51#/bu) 6" " " " " Barley Drive Type 3 (Based on 51#/bu) 6" " " " " Buck Wheat Drive Type 3 (Based on 48#/ bu) 6" " " " " Cotton Drive Type 1 (De-linted) 6" " " " " Cotton Drive Type 1 (De-linted) 6" " " " " Flax or Sudan Drive Type 1 (Based on 55#/bu) 6" " " Millet Drive Type 1 (Based on 60#/ bu) 6" " " " " /15/ , 2410 and 2420 Three-Point Drill M 19

22 Section 3 Adjustments Great Plains Mfg., Inc. Seed-Rate-Handle Setting 6" Milo 7" Drive Type (Based on 64#/ bu) 8" " Oats Drive Type 3 (Based on 37#/bu) 6" " " " " Peas Drive Type 3 (Based on 61#/bu) 6" " " " Peas Drive Type 4 (Based on 61#/bu) Pinto Beans Drive Type 1 (Based on 61#/bu) 6" " " " " Pinto Beans Drive Type 2 (Based on 61#/bu) 6" " " " " Rice Short Grain Drive Type 3 (Based on 43#/bu) 6" " " " " Rice Short Grain Drive Type 4 (Based on 43#/bu) 6" " " " " Rice Long Grain Drive Type 3 (Based on 47#/bu) 6" " " " , 2410 and 2420 Three-Point Drill M 5/15/06

23 Great Plains Mfg., Inc. Section 3 Adjustments Seed-Rate-Handle Setting 6" Rice 7" Long Grain 7.5" Drive Type 4 (Based on 8" #/bu) Rye Drive Type 1 (Based on 57#/bu) 6" " " " " Soybeans Drive Type 2 (Based on 58#/bu) 6" " " " Soybeans Drive Type 3 (Based on 58#/bu) 6" " " " " Soybeans Drive Type 4 (Based on 58#/bu) 6" " " " " Sun flowers Drive Type 1 (Based on 28#/bu) 6" " " " " Wheat Drive Type 2 (Based on 64#/bu) 6" " " " " Wheat Drive Type 3 (Based on 64#/bu) 6" " " " " Wheat Grass Drive Type 1 (Based on 23#/ bu) 6" " " " " /15/ , 2410 and 2420 Three-Point Drill M 21

24 Section 3 Adjustments Marker Adjustments Folding Speed with Needle Valves A needle valve controls the folding speed of markers that are plumbed separately. The needle valve is near the rod end of the marker cylinder. See Figure With tractor idling at a normal operating speed, adjust marker folding to a safe speed. Turn adjustment knob clockwise to reduce folding speed or counterclockwise to increase folding speed. Excessive folding speed could damage markers and void the warranty. Great Plains Mfg., Inc. Transport Carrier When marker is folded, the second section should be centered in transport-carrier saddle and parallel with top of drill box. To adjust front-to-rear position of saddle, loosen 1/2-by-6- inch u-bolts (1) that fasten transport-carrier mount onto box frame. Slide transport-carrier assembly forward or back as needed. To adjust height of saddle, loosen 1/2-by-2-inch u-bolts (2) that hold carrier tube to mounting bracket. Slide carrier tube up or down as needed. Refer to Figure Figure 3-12 Needle Valve Folding Speed with Sequence Valve If markers are tied together with an optional sequence valve, adjust folding speed with hex adjustment screws on the sequence-valve body. See Figure There is one adjustment screw for raising speed (1) and one for lowering speed (2). Identify adjustment screws by markings stamped in valve body. With tractor idling at a normal operating speed, adjust marker folding to a safe speed.turn adjustment screws clockwise to decrease folding speed and counterclockwise to increase folding speed. Excessive folding speed could damage markers and void the warranty. After adjusting the folding speed, tighten jam nuts on hex adjustment screws to hold settings Figure 3-14 Marker Transport Carrier Figure 3-13 Speed Adjustment, Sequence Valve , 2410 and 2420 Three-Point Drill M 5/15/06

25 Great Plains Mfg., Inc. Section 3 Adjustments Marker Chain There are two interrelated adjustments for the marker chain. Make these adjustments in the following order. Refer to Figure Lifting Slack. With marker unfolded, back full-threaded adjustment bolt (1) down until head extends as little as possible. Slowly fold marker while observing disk. If marker disk slides across ground more than a foot before chain and linkage lifts it up, the chain is too long. Shorten chain one or two links by moving clevis (2). Check adjustment by repeating folding process. If chain is too short when marker is unfolded, it will prevent end of marker from dropping into field depressions, causing skips in your marker line. Correct this condition by lengthening chain one or two links at clevis (2). 2. Folding Slack. Fold marker. Use full-threaded adjustment bolt (1) to take slack out of chain while marker is folded. Extend bolt until there is no chain slack. Lock bolt in this position by tightening nuts (3) on either side of upright channel (4). Disk Adjustment There are two ways you can change the mark left by the marker disk. Refer to Figure Disk Angle. To change angle of cut, loosen 1/2-inch bolts holding disk assembly. Rotate disk assembly as desired. 2. Direction of Cut. To change direction of cut and throw dirt either in or out: a. Reverse blade and depth band by remounting lug bolts on disk hub. b. Reverse angle of assembly by removing two 1/2- inch bolts holding disk assembly. Turn disk assembly one-half turn. Reinstall 1/2-inch bolts and set disk angle Figure 3-15 Marker Chain Adjustment Figure 3-16 Disk Blade Adjustments 5/15/ , 2410 and 2420 Three-Point Drill M 23

26 Section 3 Adjustments Great Plains Mfg., Inc. Bleeding Marker Hydraulics To fold properly, the marker hydraulics must be free of air. If the markers fold in jerky, uneven motions, follow these steps.! CAUTION 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 drill when folding or unfolding the markers. Disk Scraper Adjustment To keep the double-disk openers turning freely, dirt scrapers are mounted between the disks to clean as the disks rotate. A scraper is shown in Figure As field conditions vary, you may need to adjust the scrapers. In damp conditions, lower the scrapers. If openers are not turning freely, raise the scrapers. To adjust, loosen the 3/8-inch bolt and move scraper as needed.! WARNING Escaping fluid under pressure can have sufficient pressure to penetrate the skin. Check all hydraulic lines and fittings before applying pressure. Fluid escaping from a very small hole can be almost invisible. Use paper or cardboard, not body parts, and wear heavy gloves to check for suspected leaks. If injured, seek medical assistance from a doctor that is familiar with this type of injury. Foreign fluids in the tissue must be surgically removed within a few hours or gangrene will result. 1. Check that tractor hydraulic reservoir is full. 2. With both markers lowered into field position, loosen hydraulic-hose fittings at rod and base ends of marker cylinders. If applicable, loosen fittings on back side of sequence valve. IMPORTANT: Never bleed an O-ring fitting. Instead, bleed a nearby pipe or JIC fitting. 3. With tractor idling, activate tractor hydraulic valve until oil seeps out around a loosened fitting. Tighten that fitting. IMPORTANT: JIC fittings do not require high torque. JIC and O-ring fittings do not require sealant. Always use liquid pipe sealant when adding or replacing pipethread fittings. To avoid cracking hydraulic fittings from over tightening, do not use plastic sealant tape. 4. Reactivate tractor hydraulic valve until oil seeps out around another loosened fitting. Tighten that fitting. Repeat process until all loosened fittings have been bled and tightened Figure 3-17 Disk Scraper NOTE: Optional Air-Design disk scrapers are self adjusting. Seed-Lok 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 lock up firming wheels on 00 and 10 series openers, hook one end of chain in the opener-body hole just above the wheel arm (1). Pull firming-wheel arm (2) up as high as possible and wrap chain around arm. Hook other end of chain in a link. Leave no slack in chain; secure wheel arm in its highest position Figure 3-18 Seed-Lok Lock Up, 00 and 10 Series Openers , 2410 and 2420 Three-Point Drill M 5/15/06

27 Great Plains Mfg., Inc. Section 3 Adjustments To lock up firming wheels on 20 series openers, remove lock-up handle (1) from its keeper under drill walkboard. Insert handle through hole in opener body as shown in Figure Hook handle around firming wheel (2). Pull up on wheel until arm is secured by self-loading lock-up spring (3). To unlock firming wheels on 20 series openers, use lockup handle to lift firming wheel. With your free hand, reach into opener body and unlatch spring from wheel arm Figure 3-19 Seed-Lok Lock Up, 20 Series Opener NOTE: Openers in Figure 3-18 and Figure 3-19 are disassembled for illustrative purposes only. 5/15/ , 2410 and 2420 Three-Point Drill M 25

28 Section 4 Troubleshooting Great Plains Mfg., Inc. Section 4 Troubleshooting Problem Uneven seed spacing or uneven stand Opener disks not turning freely Actual metering rate is different than desired Acremeter does not measure accurately Press wheels not compacting the soil as desired Solution Check for plugging in seed cups. Check for plugging in seed tubes. Reduce ground speed. Check if opener disks are turning freely. Use faster drive type and position seed-rate handle to a lower setting. Increase opener spring pressure to penetrate low spots. Refer to Opener Down Pressure, Adjustments, page 15. Check for trash or mud build-up on Seed-Lok wheels. Lock up wheels if necessary. Refer to Seed-Lok Lock Up, Adjustments, page 24. Check for trash or mud build-up on disk scraper. Adjust scraper. Refer to Disk Scraper Adjustment, Adjustments, page 24. Check if scraper is too tight, restricting disk movement. Refer to Disk Scraper Adjustment, Adjustments, page 24. Check disk bearings. Check opener frame for damage. If opener disks turn freely by hand but not in field, reduce down pressure on disk opener. Refer to Opener Down Pressure, Adjustments, page 15. Check press wheel adjustment. Refer to Opener Depth, Adjustments, page 16. Check tire pressure. Proper inflation is listed on Tire Inflation Chart, Appendix, page 34. Check tire size. Proper size is 11L x 15. Regularly clean seed treatment from seed cups. Check seeding rate. Refer to Seeding Rate, Adjustments, page 17, for instructions on calibrating seeding rates. Consider your seed weight. Seed-rate charts are based on average seed weights. Check tire pressure. Proper inflation is listed on Tire Inflation Chart, Appendix, page 34. Check tire size. Proper size is 11L x 15. Check planting operation for excessive overlap or gaps between passes. Consider soil conditions. Loose soil and slippage will cause variations in acres registered. Check that acremeter is for your width of drill. Refer to drill parts manual. Acremeters are accurate within a 5 percent range. On 00 and 10 Series openers, reset press-wheel depth. Refer to Opener Depth, Adjustments, page 16. On 20 Series openers, adjust press-wheel spring. Refer to Opener Down Pressure, Adjustments, page 15. Increase down pressure on disk openers. Refer to Opener Down Pressure, Adjustments, page , 2410 and 2420 Three-Point Drill M 5/15/06

29 Great Plains Mfg., Inc. Section 4 Troubleshooting Problem Excessive seed cracking Drill boxes not emptying evenly Press wheel or openers plugging Seed-cup sprockets locked up or twisted seed-cup drive shaft Drill is not pulling level (parallel to ground, front to rear) Gauge wheel leans to left or right Hydraulic marker functioning improperly Marker disk does not mark Chain Solution Use slower drive type and position seed-rate handle to a higher setting. Position seed-cup-door handles to a lower notch. Certain models do not have the same number of cups between each divider of bulkhead. The section with more cups will empty sooner. Check that you have the same drive type set on both drill boxes. Consider soil conditions may be too damp or wet. Reduce down pressure on openers.refer to Opener Down Pressure, Adjustments, page 15. Do not back up or allow drill to roll backward with openers in the ground. Check for trash or mud build-up on Seed-Lok wheels. Lock up wheels if necessary. Refer to Seed-Lok Lock Up, Adjustments, page 24. Check for foreign material stuck in the seed-cup sprockets. Check for dried liquid insecticide in seed cups. Remove the build up by disassembling seed cups and scraping the foreign substance from the turning surfaces. Readjust top hitch link to level drill. Realign brackets where gauge wheel is attached to main frame by adjusting u-bolts. Check if axle bearings are securely attached to gauge-wheel arm. Check all hose fittings and connections for air or oil leaks. Check that the chain on the folding marker is slack when the marker is both fully extended and raised. Refer to Marker Adjustments, Adjustments, page 22. Check tractor hydraulic oil level. Check all bolts and fasteners. Check if needle valve is plugged. If so, open needle valve, cycle markers slowly and reset needle valve. Check that the marker folding linkage has enough slack to allow the marker disk to drop into field depressions. Maximum down float should be limited by the slot at the rod end of the marker cylinder not by the chain. Refer to Marker Adjustments, Adjustments, page 22. Reverse the blade to pull or throw dirt. Refer to Marker Adjustments, Adjustments, page 22. Be sure retainer clip is facing opposite way of chain travel 5/15/ , 2410 and 2420 Three-Point Drill M 27

30 Section 5 Maintenance and Lubrication Great Plains Mfg., Inc. Section 5 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. Drive System For proper operation and to prevent downtime and repair, keep drive chains properly adjusted and lubricated. Regularly check drive chains for excess slack and wear. Adjust idlers to remove any excess slack from chains. Refer to Figure 5-1 for idler location.! DANGER Some chemicals will cause serious burns, lung damage and death. 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. Seek medical assistance immediately if accident occurs. Know what to do in case of an accident.! WARNING Crushing hazard: You could be severely injured or killed by the falling implement. Always have frame sufficiently blocked up when working on implement.! WARNING Escaping fluid under pressure can have sufficient pressure to penetrate the skin. Check all hydraulic lines and fittings before applying pressure. Fluid escaping from a very small hole can be almost invisible. Use paper or cardboard, not body parts, and wear heavy gloves to check for suspected leaks. If injured, seek medical assistance from a doctor that is familiar with this type of injury. Foreign fluids in the tissue must be surgically removed within a few hours or gangrene will result. 1. After using drill for several hours, check all bolts to be sure they are tight. Lubricate areas listed under Lubrication, page Clean nozzles on optional rear-mount boom with a low pressure (less than 30 psi) air hose. Periodically replace nozzles. Always wear rubber gloves when making repairs or adjustments. 3. Adjust idlers to remove excess slack from chains.see Drive System, this page. Clean and use chain lube on all roller chains as needed. 4. Inflate tires as specified on Tire Inflation Chart, Appendix, page Check disk scrapers for proper adjustment. Refer to Disk Scraper Adjustment, Adjustments, page Replace any worn, damaged or illegible safety decals. Order new decals from your Great Plains dealer. Refer to Safety Decals, Important Safety Information, page 5. Figure 5-1 Drive Chains and Idlers Marker Maintenance The marker arm is attached to marker body with a 3/8- inch, grade 2, shear bolt. If shear bolt breaks, replace it with a grade 2 bolt. Figure 5-2 Shear Bolt NOTE: Failure to replace the shear bolt with a grade 2 bolt can cause marker damage. If grease-seal cap for marker-disk-hub bearings is damaged or missing, disassemble and clean hub. Repack with grease and install a new seal or grease cap , 2410 and 2420 Three-Point Drill M 5/15/06

31 Great Plains Mfg., Inc. Section 5 Maintenance and Lubrication Lubrication Lubrication Legend Multipurpose spray lube Multipurpose grease lube Multipurpose oil lube 50 Intervals at which lubrication is required 50 Seed-Cup-Shaft Sprocket Move seed-rate handle back and forth to get oil inside sprocket bore Type of Lubrication: Oil Quantity = Coat sprocket bore As Required Drive Chains Type of Lubrication: Chain Lube Quantity = Coat thoroughly 15 Gauge Wheel Arm Pivots Zerks on both gauge-wheel arms; four zerks total Type of Lubrication: Grease Quantity = Until grease emerges 5/15/ , 2410 and 2420 Three-Point Drill M 29

32 Section 5 Maintenance and Lubrication Great Plains Mfg., Inc. Seasonally Wheel Bearings Type of Lubrication: Grease Quantity = Repack 25 Marker Hinge Points Type of Lubrication: Grease Quantity = Until grease emerges Seasonally Marker Disk Bearings Type of Lubrication: Grease Quantity = Repack Storage Store drill where children do not play. If possible, store drill inside for longer life. 1. Thoroughly clean seed-treatment residue from drill boxes and seed cups. 2. Lubricate and adjust all roller chains. 3. Lubricate areas noted under Lubrication, page 29. Take special care to oil seed-cup-drive sprockets in the square bore , 2410 and 2420 Three-Point Drill M 5/15/06

33 Great Plains Mfg., Inc. Section 6 Options Section 6 Options Markers Hydraulic markers are available. The units have a cast hub, tapered roller bearings and a bolt-on blade to leave a mark for you to follow on the next field pass. Each marker requires a hydraulic circuit for operation. A sequence valve is available so markers can be operated on the same hydraulic circuit. For information on how to operate the markers, refer to Marker Operation, Operating Instructions, page 13. For information on transporting the markers, refer to Transporting, Operating Instructions page 14. For information on how to adjust the markers, refer to Marker Adjustments, Adjustment, page 22. For information on maintaining the markers, refer to Lubrication, Maintenance and Lubrication, page 29. To order markers, contact your Great Plains dealer Marker Package Part Number 24-Foot, Three-Point Dual Markers A Sequence Valve A Parking Stand The optional parking stand allows you to safely and easily park the three-point drill. The stand attaches to the rear of the main seed box. Simply unpin the stand and rotate up for field operation. To order the stand, contact your Great Plains dealer. Package Part Number Parking Stand A Rear Mount Boom The drill boom mounts under the walkboard and allows you to apply liquid herbicides or pesticides behind the drill press wheels. The kit includes mounting hardware, boom plumbing and nozzle bodies for 20-inch spacing. Tractor tanks, pump, plumbing to the drill and nozzles are required. To order the boom, contact your Great Plains dealer. Package Part Number A 24-Foot Spray Boom /15/ , 2410 and 2420 Three-Point Drill M 31