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Tecnologia Automotiva Catarinense TAC Stark 4WD – key facts: Brazilian four-wheel-drive working machine with a diesel engine from the 2009 build year for field and site work on unstable ground
Four-wheel-drive working machines such as the TAC Stark 4WD are built in Brazil chiefly for work on the country's large farming areas and in rural road construction, where four-wheel drive on unstable ground decides whether a machine keeps moving or gets stuck. The name Tecnologia Automotiva Catarinense points to the Brazilian state of Santa Catarina as the maker's base.
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The TAC Stark 4WD dates from the 2009 build year and is powered by a diesel engine. The combination of four-wheel drive and a diesel engine is the rule for working machines of this size, since field or site work depends both on pulling power at all four wheels and on the endurance and lower fuel consumption of a diesel engine compared with a petrol one.
Four-wheel drive in such machines requires power to be split across two driven axles and usually a transfer case to all four wheels, which markedly improves traction on loose or waterlogged ground compared with a vehicle driven on only one axle. Diesel engines of this class usually run with direct injection and deliver their torque already at low revs, which eases pulling work.
Buying such a four-wheel-drive working machine second-hand, the condition of the transfer case, propshafts and differentials matters, since repairs to the four-wheel drive on smaller, regional brands often mean longer waits for parts. Equally important are the tightness and condition of the diesel injection and corrosion of the frame and attachments, which progresses noticeably faster in outdoor farm use than on vehicles with covered storage.
Sources: SpecCodex-Register: Kennwerte des Modells TAC Stark 4WD Flex
