Related Manuals for Underhaug UM 7926
Summary of Contents for Underhaug UM 7926
- Page 1 UM 7926/7934/7942/7950/7966 DIRECT SEED DRILL Instruction and spare parts Edition 2025 Revised 01.01.2025 Language Original user manual...
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Page 2: Warranty
Warranty claims must be reported within the warranty period. The dealer must complete a claim form for each warranty case and send it to Underhaug's sales company/importer by the 10th of the month following the damage report. -
Page 3: Table Of Contents
Contents General Safety ....................pg. 4-8 Supplementary Safety .................. pg. 9 Technical Data………..................pg.10 The intended use of the machine…………………………………………………………...pg. 11-20 Spare Parts ....................pg.21-30 EU Declaration of Conformity ............... pg. 31... -
Page 4: General Safety
Safety Before operating the machine protection must be used. Keep the tractor’s Before operating, adjusting, or repairing the windows and doors closed to reduce the machine, the user, repairer, and owner must noise level around the driver familiarize themselves with the safety Ensure proper tractor compatibility instructions provided in this manual (Fig 1). - Page 5 Some countries require the use of safety chains when transporting a towed machine. Think safety while working The tractor engine should be stopped and the ignition key removed before performing Hydraulics any repair work, lubrication, or other Be cautious when handling hydraulic maintenance on the machine.
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Page 7: Maintenance
Be aware of the tipping hazard when driving on slopes and on soil with low bearing capacity. Reduce the load. Lights The owner/operator is responsible for equipping the machine with the correct sound and reflectors when driving on public roads. Follow public regulations. (Fig. -
Page 10: Supplementary Safety
Supplementary Safety Instructions for UM 7926/7934/7942/7950/7966 Direct Seeding machines This machine is marked with this warning sign. If the sign is damaged, it must be replaced. Warning sign 220532 (fig. 1). Remember! Read and understand the instruction manual before using the equipment and before adjusting and performing maintenance. -
Page 11: Technical Data
Technical data UM 7926 UM 7932 UM 7942 UM 7950 UM 7966 Work. width 1,5 m 2,0 m 2,5 m 3,0 m 4,0 m Seed box 160 L 215 L 270 L 320 L 560 L Row space. 6 cm... - Page 12 Preparation of a new machine The seeder is delivered fully assembled from the factory, except for the drive wheels and drive chains for the seed boxes. These must be installed afterward. The machine is delivered securely strapped to a transport pallet.
- Page 13 Transport Due to the large transport width, a detachable transport drawbar has been developed for towing on roads. This is an optional feature for the 3.0 m seeder and standard for machines larger than this. The towing drawbar kit has article number 196100. Seed Box The seeder is equipped with a seed box specifically designed for sowing grass seeds.
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Page 14: Scale Setting
Adjustment of Seed Output The seed rates indicated in the table on the machine are approximate. The properties of a seed variety can vary from year to year and depend on the humidity. Therefore, it is recommended to perform a calibration test before starting the seeding operation to ensure that the set seed rate is accurate. - Page 15 Calibration Test 1. Find the seed variety (or equivalent) to be sown in the sowing table. 2. Refer to the table to determine how many kg/ha should be sown and the corresponding setting on the adjustment handle. The adjustment handle is located at the end of the seed box and has a scale from 0-21.
- Page 17 ROTATION TABLE IN DEKARES Rotation measured on the drive wheel Rotation measured on the seed box ¼ da ½ da 1 da ¼ da ½ da 1 da Example 1: Kilograms per hectare Calibration test on a 2.5-meter seeder. Rotate the drive wheel 56 times, which corresponds to ¼ dekar (250 m²). The seed dispensed is weighed, and the measured seed amount is multiplied by 4.
- Page 18 Frame with Seed Skis The seed skis (seed plates) with arm and pressure spring are mounted in a parallelogram configuration on the frame. The seed ski itself is attached to the arm in such a way that it is movable, allowing it to absorb small unevenness in the ground. The suspension arm is pushed downward by a pressure spring, and the spring arm also has a stopper that keeps the seed ski lifted off the ground when the machine is raised by the three-point hitch.
- Page 19 Adjustment of Knife Depth Each seed ski is equipped with two hardened steel knives that create two seed furrows in the grass when the seed ski slides with pressure against the ground. The knives have two elongated holes at the front and are fastened through these to the seed ski with two bolts. At the rear, there is a stop bolt that prevents the knife from lifting, either due to repeated impacts against hard stones or when driving in extra hard soil.
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Page 20: Practical Tips
Practical Tips Seeding Speed Since seed dispensing occurs with ribbed seed rollers, there is a practical upper limit to the speed at which you can operate the seeder. If the seed rollers spin too quickly, the seed does not have enough time to fall into the furrows, and the seed rate decreases as roller speed increases. This needs to be tested experimentally. -
Page 21: Troubleshooting
Troubleshooting Adjustment Handle is Stiff There may be sand or dirt in the threads of the adjustment handle or in the seed rollers. Clean if necessary and lubricate with silicone spray. Seed Rate Changes During Seeding Check if there is any play or wear between the seed axle and the adjustment handle, and if necessary, adjust by adding an extra tension washer between them. - Page 23 SPARE PARTS FIG. 1 Ref. Part No. Item Description 190415 Seed Box COMPLETE 1.5 m 190420 Seed Box COMPLETE 2.0 m 190425 Seed Box COMPLETE 2.5 m 190430 Seed Box COMPLETE 3.0 m 190023 Frame COMPLETE 1.5 m 190024 Frame COMPLETE 2.0 m 190025 Frame COMPLETE 2.5 m 190185...
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Page 25: Item Description
SPARE PARTS FIG. 2 Ref. Part No. Item Description 190416 Seed Box 1.5 m 190421 Seed Box 2.0 m 190426 Seed Box 2.5 m 190431 Seed Box 3.0 m 190903 Handle for Cover 190418 Cover 1.5 m 190423 Cover 2.0 m 190428 Cover 2.5 m 190433... - Page 27 SPARE PARTS FIG. 3 Ref. Part No. Item Description 190835 13-25 Shoe Assembly COMPLETE 190865 13-25 Spring Arm Black 190888 13-25 Ski Arm Black 190883 13-25 Compression Spring 190839 13-25 Cotter Pin 190852 13-25 Washer for Compression Spring 813550 26-50 Hex Bolt M10x50 Full Thread 813890 13-25 Hex Bolt M16x100 860166...
- Page 29 SPARE PARTS FIG. 4 Ref. Part No. Item Description 1-24 190863 Drive Wheel COMPLETE 190861-A Drive Wheel Arm 190861 Drive Wheel 190481 Inner Arm 190470 Axle for Drive Wheel 190473 Double Gear 190811 Chain Tensioner COMPLETE 190472 Gear 21z Black 870725 Ball Bearing 6205 190057...
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Page 31: Spare Parts
SPARE PARTS FIG.5 Ref. Part No. Item Description 190931 Hydraulic Set COMPLETE 1.5 m 190930 Hydraulic Set COMPLETE 2.0 m 190928 Hydraulic Set COMPLETE 2.5 m 1909229 Hydraulic Set COMPLETE 3.0 m 190910-1.5 Hydraulic Pipe 1.5 m 190910-2.0 Hydraulic Pipe 2.0 m 190910-2.5 Hydraulic Pipe 2.5 m 190910-3.0... -
Page 32: Eu Declaration Of Conformity
+47 51 43 49 78 Declares that the following machine: Manufacturer: Underhaug AS Type: UM 7926/7934/7942/7950/7966 - Direct Seeding machines Serial Number: Production Year: complies with the following directive: Maximum regulation 554 (for 2009-05-20-554) and meets essential health and safety requirements. - Page 33 Torlandsvegen 3 – P.Box 183 N-4367 Nærbø, Norway Phone: +47 51 43 49 78 Email: post@underhaug.no www.underhaug.no/eng...
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