TM 9-2320-209-10-1 d. Unloading the Dump Truck with Body Down. FRAME 1 1. Rig for unloading and lower tailgate (1) to flat position. (Refer to para 4-13b.) 2. Start engine. (Refer to para 4-6b.) 3. Back truck up to unloading dock or platform. GO TO FRAME 2 4-244