A hot starter cable extends from a hot starter valve and an end of the hot starter cable is connected to a hot starter lever provided in the vicinity of a handle so that the hot starter valve can be opened by operating the hot starter lever. It is possible to easily operate the hot starter lever while the operator always keeping a hold on the handle, so that the operability at the time of restarting the engine can be further enhanced. In addition, since the hot starter lever is present within the visual field of the driver, the hot starter lever can be securely operated.