TURNING SERVICE CAR

PURPOSE:To improve safety and performance by disposing a swivel base into a swivel diameter in approximately the same width as the breadth of a car while properly arranging a working machine, an engine, etc., and lowering the center of gravity and installing a walk-through hatchway. CONSTITUTION:A plan-view arcuate upper body structure B with the center O of rotation is disposed into a swivel diameter in approximately the same as car body width. A working machine A is arranged to a section fronter than the front end of the upper body B, and a walk-through hatchway D is formed. Next, a seat 9 and an engine 11 are disposed to the left and right of a center line M, and the engine 11 is positioned in the rear of the center O. A hydraulic oil tank 14 and a fuel tank 31 are disposed to the side of the center O of rotation, and the tank 31 is positioned along the hatchway D. Further, a hatchway E is formed between the seat 9 and an operating column 25, and communicated with the hartchway D. Accordingly, a collision can be prevented when the upper body is turned while a boom swing type sideditch digging can be adopted, the center of gravity is lowered and travelling, operation capability, etc., can be improved, and an operator can get on and off easily.