A rearwardly pivotable hood for enclosing a tractor engine is disclosed wherein a hinge member pivotally mounts the hood to the tractor chassis. The hinge member includes an upper hinge portion movably supported on a lower hinge portion, which is fixed to the chassis of the tractor. The upper hinge portion carries a generally transverse and horizontally extending hinge axis which is connected to the hood to allow a rearwardly pivotable movement thereof. An adjustment mechanism to provide a side-to-side movement of the hood includes a centrally positioned vertical pivot pin interconnecting the upper and lower hinge portions to define an axis of rotation about which the upper hinge portion is movable into a selected orientation relative to the lower hinge portion. A pair of bolts passing through slotted openings serve to clamp the upper and lower hinge portions together.