Excavator with a piping structure for absorbing variations in hose length

摘要

An excavator such as a backhoe has a group of hoses variable in length when a boom moves up and down. To avoid the group of hoses bulging to obstruct view when the boom is raised to an uppermost position, the group of hoses has a length absorbing portion disposed in a swivel base instead of being disposed on a boom as in the prior art.