PURPOSE: To keep a body horizontal in a short structure in response to the degree of inclination by rotatably mounting stands for raising the rear section of the body at the rear end of an equipment mounting section connected to the lower side of a load carrying platform, and pivotally mounting both ends of hydraulic cylinders to the stands and the cylinder mounting seats of the body.

CONSTITUTION: The body 2 has a mounting section 2b connected to the lower side of a load carrying platform 2a, which is equipped with the various kinds of equipment, paired right and left support seats 17 and 17 are provided for the component member of the mounting section 2b, and the upper end sections of stands 18 and 18 are rotatably mounted to the support seats 17 and 17 in such a way as to be freely rotated. Both end sections of hydraulic cylinders 20 and 20 are pivotally mounted to cylinder mounting seats 19 and 19 provided for the body 2. The hydraulic cylinders 20 and 20 are connected to a working oil suction and exhaust circuit formed in relation to the hydraulic circuits of lift cylinders so as to be arbitrarily extended/contracted and suspended by controlled operations by a lower section control panel. The stands 18 and 18 are thereby erected by extending the hydraulic cylinders, and ground contacting plates 18a and 18a are brought into contact with the ground surface, so that the rear section of the body 2 is thereby raised.