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Siirry sivupalkkiinSiirry alaosaanNiva SK-5




The first Soviet self-propelled combine harvester, the S-4 Stalinets, was introduced in 1947. Based on it, the Vistula was developed in Poland, the E170 series in the GDR, and the AC400 Emag in Hungary. The S-4 had a 4.0-meter cutting width, an 85 cm threshing drum, and a 55-horsepower gasoline engine. At this stage, however, pull-type combines were the most prominent in the Soviet combine production, with the largest manufacturer being Rostov Agricultural Machinery Factory, known as Rostselmash, founded in 1929.
In 1958, the SK-3 was introduced in Rostov, featuring a 120 cm threshing drum, an 18-hectoliter grain tank, and a maximum 5-meter cutting platform. In 1962, a more powerful version arrived, the SK-4, which was equipped with a 115-horsepower diesel engine. By 1969, the Rostov factory had produced one million combine harvesters.
In 1973, a heavily modernized version of the previous model, the Niva SK-5, entered production. Characteristic of the early Niva models was a cab equipped with sunshade slats and a tall structure. The engine was a 6.3-liter, 100-horsepower diesel, and the power transmission featured a continuously variable transmission (CVT). Initially, cutting platforms were available in 4.0, 4.5, 5.0, and 6.0 meters, and later also in 7.0 meters. The speed and distance of the straw walker drum were hydraulically adjustable. Both sieves were adjustable. The blower did not have directional airflow control. The number of grease nipples decreased from 200 on the SK-4 to 60.
The Niva was tested at Vakola in 1975, and the final assessment of the combine’s operational features and durability highlighted many shortcomings. Of course, improvements came over its long model history. An option introduced was a turbocharged 120-horsepower engine, a hydrostatic drive as an accessory, and finally, in the Niva Effect model, a Belarus 6-cylinder 155-horsepower engine.
In the 2000s, the Niva was sold mainly in Eastern Europe and Africa. By the end of production in 2018, 1.2 million units had been manufactured.
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| Model | Niva SK-5 | Rostselmash Niva |
|---|---|---|
| Imported to Finland | No | No |
| Years | 1973- | -2018 |
| Engine type | SMD-17K | D-260.1-36 |
| Displacement | 6300 cm³ | 7120 cm³ |
| Cyl/turbo | 4 | 6TI |
| Power | 100 hp DIN | 155 hp DIN |
| Alternative hp | 120T hp | - |
| Fuel tank | 187 l | 300 l |
| Transmission | mech. | hydr. |
| Gears | 3 | 3 |
| Speed min-max. | 1,0-18,7 km/h | - |
| Cutting width | 386 cm | 410 cm |
| Cutting width, alternative | 450-700 cm | 500 cm |
| Reel diameter | 108 cm | 108 cm |
| Header length | 45 cm | 45 cm |
| Threshing cyl. diameter | 60 cm | 60 cm |
| Threshing cyl. width | 119 cm | 119 cm |
| Number of straw walkers | 4 | 4 |
| Area of walkers | 403 dm² | 403 dm² |
| Lenght of walkers | 360 cm | 360 cm |
| Straw shieve | 98 dm² | 98 dm² |
| Bottom shieve | 81 dm² | 81 dm² |
| Total screening area | 242 | 242 |
| Overall lenght | 1050 cm | 1092 cm |
| Overall width | 441 cm | 393 cm |
| Height with cabin | 402 cm | 410 cm |
| Weight with cabin | 7640 kg | - |
| Grain tank | 28 hl | 30 hl |
| Unl. height | 296 cm | 260 cm |
| Tyres front (Finland) | 21.3-24 | 21.3-24 |
| Reel forward/backw. adjustment | hydr. | hydr. |
| Reel speed adjustment | hydr. | hydr. |
| Threshing cyl. speed adjustment | adj, in cabin | - |
| Bottom sieve | adj. | adj. |
| Brakes | drum | drum |
| Type of cutting platform floating | spring | - |
| Engine | - | Minsk |
| Weight without header | - | 7400 kg |
| Tyres rear (Finland) | - | 12-16HC8 |
| Air conditioning | - | x |
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