Porsche Super N 308
The Porsche Super N 308 is a tractor from Porsche-Diesel Motorenbau GmbH , which was based in Friedrichshafen on Lake Constance and produced the tractor model from 1957 to 1960. The Porsche Super N 308 was the successor to the Porsche P 133 .
An air-cooled and standing four-stroke three cylinder - diesel engine with swirl chamber method and a forced-feed lubrication provided for the drive of the Porsche-Diesel Super N 308. 28 kW payable engine operates with the Porsche-Optima combustion process and has a stirnradgetriebene underlying camshaft and hanging valves . The crankshaft has four bearings. The top speed is 29.9 km / h . In addition, the engine was equipped with a radial cooling fan with thermostat control and a Bosch injection system. The ZF or Getrag gear change transmission of the Porsche Super N 308 was provided with five forward and one reverse gears. A crawler gear could also be ordered as an option . In addition, the tractor had a ground speed PTO according to DIN 9611 Form A and a further rear transmission PTO . The Porsche tractor also had a separately switchable front PTO, which was also suitable as a mower .
The Porsche Super N 308 was offered in different versions. By adjusting the intelligent quick-release axles , the Super N 308 could produce two different wheelbases with a track width of 1250–1650 mm at the front and 1285–1880 mm at the rear. The rear axle had a mechanical differential lock and was produced in a portal design with adjustable rims. A foot-operated inner shoe brake , which could also be operated individually, served as the brake on the rear wheel . Independent of this, a lockable handbrake acted directly on the gearbox .
literature
- Armin Bauer: Porsche tractor 1937 to 1966. Schwungrad Verlag, Obershagen 2003, ISBN 3-933426-11-1 .