| 摘要 |
PURPOSE:To shorten the height of an engine room, by mounting an opening of a through valve of a pistion to a center portion of a movable trolley block of an overhead travelling crane. CONSTITUTION:A pistion P is temporarily placed onto an upper portion D of a cylinder through a support base 5 under a condition that the piston is lifted by means of a piston lifting tool 2 until a lower portion of the piston P reaches portions slightly upper than the upper portion D of the cylinder. A hanging fittings 4 is mounted near a center portion of the piston P, and the piston P is further lifted through the hanging fittings 4 and lifted up to portions just under a ceiling C of an engine room through an opening installed to a center portion of a movable trolley block K. The movable trolley block K is moved under this condition, and the piston P is placed onto an inspection base 6, thus completing the drawing work of the piston P. Consequently, the height of the engine room can be shortened. |
