TM 9-2320-209-20-3-2 (3) Fittings. (a) Tube and elbow assembly NOTE Tube and elbow assembly on air hydraulic cylinder is used for this typical procedure. FRAME 1 1. Using 5/8-inch wrench, unscrew and take out two screws (1). Take off skid plate (2). GO TO FRAME 2 13-93