TM 9-2320-209-20-3-4 g. Replacement. (1) Power takeoff sprocket. FRAME 1 1. Put sprocket (1) in place. 2. Hold 2 x 4 x 15 1/2-inch wood block (2) between teeth of sprocket (1) and truck frame. Using 3/4-inch drive ratchet, short extension, and 1 1/2-inch socket, screw on and tighten shaft nut (3). 3. Using needle nose pliers, put cotter pin (4) through hole in shaft nut (3) and bend open ends of cotter pin. GO TO FRAME 2 TA 080920 19-39