SLEWING SERVICE CAR

PROBLEM TO BE SOLVED: To ensure the space of the foot section of a seat widely while easily conducting operation returning a slewed superstructure in the travelling direction as viewing a front side from the seat in a slewing service car. SOLUTION: In the slewing service car, a swivel base frame 2 is installed rotatably to a travel device through a swivel base bearing, a seat 9, an engine 11, a hydraulic pump 7, an oil tank 14, etc., are disposed to the swivel-base frame 2 and a superstructure is constituted, a working machine is supported pivotally at the front end section of the swivel base frame 2 through a working- machine pivotally support section movably in the vertical direction and the horizontal direction, and at least the rear maximum size section of the superstructure is kept within the width of the travel device. A side end section on the seat 9 side of the swivel base frame 2 is formed in an approximately rectilinear shape, a front end section on the seat side of the swivel base frame 2 is formed in the approximately rectilinear shape, and the slewing service car is configured in such a manner that the extended crossed sections of the seat- side side end section and seat-side front end section of the swivel base frame 2 are kept within an approximately turning circle in the rear maximum size section of the superstructure at that time.