Seyalka novaya universalnaya SUPN-8, Dnipropetrovsk region.

Intended for dotted sowing of corn, sunflower and other plowed crops with simultaneous application of mineral fertilizers separately from seeds. The seeder is intended for operation in all climatic zones except the zone of mountain agriculture. The seeder is aggregated with tractors of class 1.4. It can be equipped with a system for monitoring the process of sowing seeds and the level of seeds and fertilized in bunkers. The seeder can consist of both 8 and 6 sections. The width of the capture will be 5.6 and 4.2 meters, respectively.

Having contact with many seeders, I want to say! The seeder is easy to handle, easily adjustable, easy to control the sowing process.

The general device of the seeder.

The principle of operation of the seeder is as follows. By means of the transmission mechanism from the supporting and driving wheels, the rotation of the seed sowing discs and spring augers of the fat seeding apparatus is carried out. The vacuum in the horseshoe-shaped cavity of the cover of the seeding device is created either by a fan driven by a hydraulic motor from the tractor's hydraulic system, or by vacuum from the tractor's exhaust using a special pipe. To control the amount of discharge on the fan or on the exhaust, a control valve with a diaphragm pressure gauge is installed.

The seeds are sucked into the holes of the rotating disk located in the discharge zone and transported from the intake chamber to the discharge zone. The removal of excess seeds that have been sucked into the holes back into the intake chamber is carried out by the pins of the fork installed in the intake chamber of the device, between which the seeds that have been sucked into the holes pass when the disc rotates. In the lower part of the device, when the hole passes from the vacuum zone to the atmospheric pressure zone, the seeds fall one by one from the hole and are placed on the bottom of the furrow formed by the seed heel of the coulter.

The spring augers of the fat-screening device with the left and first winding carry out the fertilizers from the hopper into the funnels. Dispersers, performing oscillatory movements at the exit windows of the funnels, disperse the fat flow, ensuring a uniform stream in the fat ducts, and then into the furrows formed by the fat heels of the coulters. The wrappers cover the furrows with the seeds and fertilizers placed in them with soil. Then those behind the wrappersrolling wheels compact the soil above the furrows, creating contact between the seeds and the soil and conditions for them to absorb moisture. At the end, the plumes or chain even out the topography of the field and create a mulched soil layer.

Left and right markersdisc type are used on the seeder, which are intended to form a trace of the unsown part of the field with the aim of obtaining joint inter-row spacing and ensuring the rectilinear movement of the unit during subsequent runs. Basically, markers are lowered and raised by a hydraulic mechanism controlled from the tractor cab. But in practice, they use either a mechanical lift or generally adjust the markers so that they are lowered only at the beginning of sowing.

Each marker has a rod with a stretcher, which is hinged with a bracket bolted to the flanges of the frame. Axes are attached to the rods, on which the discs rotate freely.

Sowing a given number of seeds of one or another crop per linear meter of the row is achieved by selecting the seeding disc and gear ratio.

1. Set the transmission mechanism to the required seeding rate, using the diagram and table, taking into account that one seed is sucked into each hole.

To change the gear ratio, first loosen the chain of the transmission mechanism, for which it is necessary to turn the handle 2. around the axis of the shaft counterclockwise until the groove of the handle aligns with the projection on the body of the transmission mechanism and fix the handle in this position.

Move block 9 (fig. 9) of three sprockets on shaft 11, chain with roller 6 to the required position by hand, and move the block with five sprockets to the desired position by hand.

After installing the chain on the corresponding sprockets, move the handle of the tensioning device to the initial position.
(//tractor-service.com)
It is necessary to pay attention and, if necessary, change the combinations of stars G on the mission shaft at the section suspension bracket and B on the output shaft of the gear mechanism.

2. Then you need to set up the excess seed dropper.

The position of the forks is regulated separately on each device depending on the required seeding accuracy.

Set the seeder in a suspended state so that the supporting and driving wheels do not touch the soil, and they could be rotated manually.

Pour the seeds into the hopper.

Install the levers of the release of excess division seeds, according to the description. It is possible to adjust the resetters with the help of a template, but as practice shows, correction is still required when checking.

A) Adjustment using a template.

The template is a cast part with two grooves for the fork pins. When combined with the grooves, the pins occupy a tangential position to the circumference of the location of the holes of the seeding disc.

Sowing a given number of seeds of one or another crop per linear meter of the row is achieved by selecting the seeding disc and gear ratio.

1. Set the transmission mechanism to the required seeding rate, using the diagram and the table, taking into account that one seed is sucked into each hole.

To change the gear ratio, first loosen the chain of the transmission mechanism, for which it is necessary to turn the handle 2. around the axis of the shaft counterclockwise until the groove of the handle aligns with the projection on the housing of the transmission mechanism and fix the handle in this position.

Move block 9 (fig. 9) of three sprockets on shaft 11, chain with roller 6 to the required position by hand, and move the block with five sprockets to the desired position by hand.

After installing the chain on the corresponding sprockets, move the handle of the tensioning device to the initial position.

It is necessary to pay attention and, if necessary, change the combinations of stars G on the mission shaft at the suspension bracket of the section and B on the output shaft of the transmission mechanism.