TM 9-2320-209-10-1 b. Fording. TOOLS: Straight bar plug wrench Ratchet wrench 1. Make sure that water is not deeper than 30 inches. 2. Using a straight bar plug wrench and ratchet handle, unscrew flywheel housing drain plug (1) from storage boss (2). 3. Screw drain plug (1) into drain port (3). GO TO FRAME 2 4-411