(9) The cooling system should be prepared and protected for temperatures below
+32 F. Refer to TB 750-651 and TM 9-207 for proper instructions. If no amoved antifreeze
solution is available, drain cooling system by removing filler cap (6), turning radiator drain
cock (7), and cylinder block drain cock (8) counterclockwise.
Be sure all coolant has been drained from the cooling system before leaving your
truck. If drain holes have become blocked by foreign matter, use a soft wire to clear