TM 9-2320-209-34-2-2 c. Disassembly. FRAME 1 1. Take off cotter pin (1) and nut (2) from main drive idler gear shaft (3). Throw away cotter pin. 2. Take out main drive idler gear shaft (3) and pull off packing (4). Throw away preformed packing. 3. Pull off preformed packing (5) and throw it away. 4. Lift out idler gear assembly (6). GO TO FRAME 2 17-570