Find out PCs of front legs (H) 1pc of front stretcher 1), see the drawing, attach the 2 front legs (H) and front stretcher (1). Put the seat frame (L) on a smooth flat surface. Attach the two front legs (H) with front stretcher (1) to the seat frame (L), use bolt (G), lock washer (C) fiat washer (D) in the both of hole of seat frame (L) and the front leg (H), turn the Allen wrench (A), in bolt net too tight.
