The Robur LO 1801 A is a forward control off-road truck, made by East German manufacturer VEB Robur-Werke Zittau. It was produced from 1965 to 1973, alongside the on-road model LO 2501. Unlike the on-road model, the LO 1801 A has all-wheel drive, which came at the cost of a reduced payload. LO 1801 A is an abbreviation for air-cooled otto, 1800 kg payload, all-wheel drive.

Like its predecessors, the LO 1801 A was used by the East German military, police, fire brigade, and open pit mining rescue service. Export versions were called Safari.

Technical description

The LO 1801 A is a light, 1.8 tonne, two-axle, all-wheel-drive, body-on-frame, forward control truck with single tyres.

The frame has two U-section longitudinal members, and four tube, and two square-shaped crossmembers. It comes with only few grease nipples. Both front and rear axles are leaf sprung rigid live axles, only the front axle has hydraulic shock absorbers. Differentials with a reduction of 6:35 were installed. The steering system is a worm-and-lever steering system. All four wheels come with 9.00—20 inch rims, 10—20 inch extra tyres, and drum brakes. Robur installed a dual-circuit braking system. The cab is made of steel, has front-hinged doors, a split windscreen, and split A-pillars with narrow windows for improved visibility. Unlike the LO 2501, which only seats three, the Robur LO 1801 A seats four.

The gearbox is a manual, five-speed, dog-leg gearbox with synchromesh and helical gearing in gears 2–5. First and reverse are straight cut gears without synchromesh. The transfer box is an unsynchronised, three-shaft gearbox with gearshift sleeves. It has an on-road gear, an off-road gear, and an additional gear for switching front-wheel drive. A dry diaphragm-spring single-disc clutch, type T20K/DZ, transmits the torque from the engine to the gearbox. The LO 1801 A is powered by an air-cooled, straight-four, OHV, carburetted LO 4/1 otto engine. It displaces 3.3 litres, and is rated .

Technical specifications

+Technical specifications Robur LO 1801 A Engine Engine type LO 4/14 VO 11,8/9,5-1 SRL Operating principle and layout Straight-four, air-cooled, four-stroke, OHV otto enginewith downdraught carburetter and battery ignition system Bore × Stroke,Displacement 95 × 118 mm,3345 cm3 Rated power (TGL 8346) at 2800 min−1 Max. torque at 1800 min−1 Fuel type VK 79 (leaded petrol, 79 RON) Specific fuel consumption 250 g/PSh (340 g/kWh) Source, unless otherwise stated Powertrain Layout Front engine, all-wheel drive Differential locks No differential locks;engaging front wheel drive automatically locks front and rear axle(due to lack of a centre differential) Tyres 4× 10—20″ extra single tyres ClutchT20K/DZ single-disc dry clutch Gearbox Five-speed + two-speed splitter PTO Available as a factory option Measurements Length 5350 mm Width 2370 mm Height 2530 mm Wheelbase 3025 mm Track width front: 1636 mmrear: 1664 mm Overhang front: 1200 mmrear: 1165 mm Turning circle 14,900 mm Ground clearance 265 mm Fording depth 800 mm Slope angle front: 36 °rear: 35 ° Mass 3200 kg Payload 1800 kg GVW 5000 kg Fuel tank 90+35 L Fuel consumption 26 L/100 km (fully laden) Source, unless otherwise stated Electrical system Generator DC generator, 41.7 A, 12 V, 0.5 kW Battery 1 × Lead-acid battery, 12 V, 105 Ah Starter 12 V, 1.3 kW

+Speed ranges and gradeability Gear Speed at 2800/min (on-road gear) Speed at 2800/min (off-road gear) Gradeability at 1700/min (off-road gear) 1st 10 km/h 6 km/h 82 % 2nd 17 km/h 9 km/h 40 % 3rd 27 km/h 15 km/h 23 % 4th 48 km/h 26 km/h 13 % 5th 80 km/h 45 km/h 8 %Source

References

VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für den Motor Typ LO 4/1 für Fahrzeugtyp LO 2501 und LO 1801 A, VEB Fachbuchverlag Leipzig 1967, p. 8 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für den Motor Typ LO 4/1 für Fahrzeugtyp LO 2501 und LO 1801 A, VEB Fachbuchverlag Leipzig 1967, p. 9 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für den Motor Typ LO 4/1 für Fahrzeugtyp LO 2501 und LO 1801 A, VEB Fachbuchverlag Leipzig 1967, p. 57 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für den Motor Typ LO 4/1 für Fahrzeugtyp LO 2501 und LO 1801 A, VEB Fachbuchverlag Leipzig 1967, p. 60 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für den Motor Typ LO 4/1 für Fahrzeugtyp LO 2501 und LO 1801 A, VEB Fachbuchverlag Leipzig 1967, p. 63 (in German)

VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für die Fahrgestelle der Lastkraftwagen LO 2501 / LD 2501 / LO 1801 A, VEB Fachbuchverlag Leipzig 1966, p. 7 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für die Fahrgestelle der Lastkraftwagen LO 2501 / LD 2501 / LO 1801 A, VEB Fachbuchverlag Leipzig 1966, p. 8 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für die Fahrgestelle der Lastkraftwagen LO 2501 / LD 2501 / LO 1801 A, VEB Fachbuchverlag Leipzig 1966, p. 9 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für die Fahrgestelle der Lastkraftwagen LO 2501 / LD 2501 / LO 1801 A, VEB Fachbuchverlag Leipzig 1966, p. 10 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für die Fahrgestelle der Lastkraftwagen LO 2501 / LD 2501 / LO 1801 A, VEB Fachbuchverlag Leipzig 1966, p. 11 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für die Fahrgestelle der Lastkraftwagen LO 2501 / LD 2501 / LO 1801 A, VEB Fachbuchverlag Leipzig 1966, p. 12 (in German)

VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für die Fahrgestelle der Lastkraftwagen LO 2501 / LD 2501 / LO 1801 A, VEB Fachbuchverlag Leipzig 1966, p. 14 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für die Fahrgestelle der Lastkraftwagen LO 2501 / LD 2501 / LO 1801 A, VEB Fachbuchverlag Leipzig 1966, p. 15 (in German) VEB Robur-Werke Zittau (ed.): Reparaturhandbuch für die Fahrgestelle der Lastkraftwagen LO 2501 / LD 2501 / LO 1801 A, VEB Fachbuchverlag Leipzig 1966, p. 16 (in German)

Oswald, Werner (ed.): Kraftfahrzeuge der DDR, (2nd ed.), Motorbuch-Verlag, Stuttgart 2000, , p. 230 (in German)

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