The Oshkosh Close Support Tanker is a highly mobile vehicle that forms the backbone of the British Army’s bulk fuel and water transportation. It can be fitted with enhanced blast-proof armour for driver and crew protection.

The Oshkosh can ford water obstacles up to a depth of 1,500mm and can climb grades of up to 34%. The curb-to-curb turning radius of the tractor is 22.5m, and the vehicle can be operated in a temperature range from –46°C to +49°C.

The Tractor is powered by a 6-cylinder Caterpillar C12 ADEM 2000 EURO III four-stroke turbocharged after-cooled diesel engine that develops 445hp at 1,700rpm.

The fully oscillating fifth wheel of the Wheeled Tanker Tractor truck is manufactured by Holland Neway and can accommodate 89mm kingpins; it can tilt 40° forward, 25° rearward and 5° to each side. The vertical fifth wheel load is given as 14,515kg.

To the front on the left side of the liquid tanks is situated a spare wheel mount and a boom with hoist has been mounted for lowering and lifting the spare.

The CST semi-trailer features a single compartment, tank with three lateral and two longitudinal baffles, that consists of cylindrical and conical sections with domed ends. Up to 20,000 litre of diesel or jet fuel can be transported in this tank, or 18,000l of water.

The Alfons Haar pump module is mounted behind the tank to the rear of the semi-trailer. It includes a self priming FPOS 100/1308 A142 R vane pump with a pumping capacity of 1349.5 litres per minute, two ground earth cable reels and cables, an Alfons Haar MKA 2290 fuel meter and two hose reels with hydraulically powered rewind.