The Lanz Bulldog D 9506 is a tractor of the HR 8 series, produced by Heinrich Lanz AG in Mannheim from 1934 to 1955, with a production stop in 1945. In total, 3817 units were produced. The tractor was sold under the brand name Ackerluft (field-air). The Ursus C-45, produced in Poland from 1947 to 1959, was a copy of the D 9506.
Description
The D 9506 utilises a frameless block construction. It has a rear live axle and a dead front beam axle. The front axle was available with optional leaf springs. The tractor has air filled tyres. The D 9506 does not have a lockable differential. The gearbox is a manual 3-speed Lanz gearbox with a reverse gear, and an additional range, this makes 6 forward gears and 2 reverse gears. The minimum speed is 3,3 km/h in first gear, maximum speed is 16,7 km/h in sixth gear. The drum brakes at the rear wheels are foot-operated, the handbrake locks the gearbox.
The standard Lanz hot-bulb engine with a displacement of 10.3 L was used, it has a thermosiphon cooler. Compared to the predecessor series HR 6 and HR 7, the engine now has a better speed governor, the rated engine speed was increased from 540 min−1 to 630 min−1. Many sorts of diesel oil can be used as fuel. The D 9506 has an electrical system. If a starter motor is used, the lead-battery has a capacity of 94 Ah, without a starter motor the capacity is 75 Ah. The Lanz factory offered additional accessories, such as a cab or fenders.
Technical data
D 9506Production1934–19441945–1955Engine characteristicsOne-cylinder, two-stroke, hot-bulb akroyd engine, no valves, no carburettor; thermosiphon cooling systemFuelFuel oil, Diesel fuel, Kerosene, BiodieselFuel injection pressure and injection time80 bar, crank angle 135°Bore × Stroke, Displacement225 mm × 260 mm,10.338 dm³Compression ratio5:1Rated power at 630 min−128 kWMaximum power for an hour at 630 min−133 kWTorque at 630 min−1 500 N·mGearbox3-speed manual with two ranges (6 forward, 2 reverse gears)PropulsionTyresMaximum speed16.7 km/hFuel consumption326 g/kWhFuel tank capacity90 LElectrical power systemLead-acid battery, 12 V / 94 Ah
References
heinrich-lanz.de: Lanz – Datenblatt für die Typen D 8506, D 9506 und D 1506 (german)
fahrzeugseiten.de: Lanz HR8 - D9500, D9506, D9511, D9531 und D9539 (german)
Siem, Gerhard: Traktoren Schlepper / Jahrbuch 2009. Page 208. October 2008. (german)
Siem, Gerhard: Traktoren Schlepper / Jahrbuch 2009. Page 291. October 2008. (german)
lanz-diesel.de: Technische Daten (meines) LANZ BULLDOG D8506 (german)
Eilbote Online: Technische Daten Lanz Bulldog D9506 - Traktor (german)