Device removing/re-inserting structure, and device removing/re-inserting method for construction machine

摘要

A demountable pillar 16 is demountably mounted to an upper frame bottom plate 9 and a floor plate 10. A spacer 35 is detachably attached to the demountable pillar 16. The spacer 35 is detached in a state that an upper load is supported by a lifting bolt 39 to reduce the height of the demountable pillar 16, and the demountable pillar 16 is demounted in a state that the upper load is supported by the other pillars. A fuel tank 11 as a device is removed from between the upper frame bottom plate 9 and the floor plate 10 in this state.