Patent ID: 6898878

Claim:
A piping arrangement for swing type hydraulic excavators, wherein a swing bracket is provided on a forward end of a swivel frame to be able to swing horizontally, the swing bracket i) mounts thereto a base end of a vertically swingable boom by means of a first horizontal support pin, ii) mounts thereto one end of a boom cylinder, which drives the boom, by means of a second horizontal support pin, and iii) mounts thereto one end of a swing cylinder, which drives swinging of the swing bracket, by means of a vertical support pin, piping is provided on a cylinder for an implement from a side of the swivel frame through the swing bracket to be arranged, the swing bracket is formed on a side thereof with a piping hole, which extends outside from an interior thereof, and piping for the cylinder for the implement, which is disposed in the vicinity of the swing bracket, is performed from the interior of the swing bracket through the piping hole.