Hydraulic shovel working machine, and manufacturing method of hydraulic shovel working machine

摘要

It reduces the number of processes required for the welding operation of the hydraulic excavator working machine, and also improves the welding quality. The boom includes an upper plate 11, a left plate 12 joined to the upper plate 11, and a boom hood bracket 15. The boom hood bracket 15 has an extension 54. The extension portion 54 has a portion facing the side surface 23 of the top plate 11.