The power transmission has a four-shaft double planetary gear, which is driven on the one hand via a turning gear and on the ohter via a variable-displacement gear and is connectable on the power take-off side via selectable ratio gears via controllable clutches to a power take-off shaft. It is connectable on the power take-off side retroactively via two of the selectable ratio gears by a startup clutch as a result of which with the turning gear disengaged, a fully hydraulic startup range is provided. The other gear ranges are mechanically-hydraulically split in terms of power when the turning gear is engaged.
