The invention relates to a multifunction self-powered undercarriage driven by a heat engine, meant to perform powered agricultural works in a vegetable farm. According to the invention, the undercarriage comprises a simple upwards curved framework (1) mounted on two axles (Pand P), namely a front leading axle and a rear driving axle, respectively, said axles being provided with a wheel system and tyres, having adjustable track and being vertically adjustable in terms of ground clearance, a reducing gear (R) transmitting the motion to three power take offs (P, Pand P) of different rotation speed, a hydraulic engine (M) provided with a distributor for transmitting the motion to the three hydraulic lifters (R, Rand R) with three attachment points, the first of which is mounted on the front axle (P) and the other two are mounted on the rear axle (P).
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