Auxiliary drive for a vehicle

The auxiliary unit (4) on a vehicle has a power take off arrangement which drives a supply aggregate (5), such as a hydraulic pump, compressor or generator. An output shaft (3), having a flange (2), rotates at 90degrees to and is spaced from the rotational axis of the supply aggregate's drive shaft (19). Drive passes in sequence via gearing (1), the output shaft, a cardan shaft (11), an angular gear (12) and a traction gear to the driven shaft. The angular gear comprises a flanged input unit (13), a cooling fan (15) driven by the input unit and an output unit (16). The traction gear may comprise sprockets and a chain, or pulleys connected by V-belts. The output shaft flange is closer to the axis of the driven shaft than the axis of the angular gear. The cardan shaft lies at an angle preferably less than 10degrees, preferably not protruding beyond the longitudinal extents of the auxiliary unit. The supply aggregate lies transversely to the direction of travel for compactness.