<；P>；PROBLEM TO BE SOLVED: To facilitate maintenance of an engine, to simplify moving constitution of a driving seat, and to facilitate of a maintenance operation performed with a cabin moved and an operation performed with the cabin not moved. <；P>；SOLUTION: The engine is provided to the front side of a grain tank, and an engine cover 9 and the cabin 12 are provided in a unified body. The cabin 12 is made movable by a link mechanism. An auxiliary step 92 in a nonuse state is stored in a space 89 between the external arm of the link mechanism and a part below a main step 88 in the cabin 12 that an operator steps on. A manual pump 90 for venting air inside of a fuel hose is provided at a part inside the auxiliary step 92 in the space 89. The manual pump 90 is operable from outside a machine body beyond the auxiliary step 92 stored in the space 89. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
