TM 10-8110-202-13&PSection III. TECHNICAL PRINCIPLES OF OPERATION1.11.PRINCIPLES OF OPERATION AND USECOUPLER VALVE - used to fill and dispense water from the fabric drum.HANOWHEEL - manual control for coupler valve.BOWS - located at both ends of drum; used to lift, suspend or tie down drum.SWIVEL PLATE - contains lugs for mounting shackles and for attaching tow bar. Swivel rotates for towing drum behindvehicle.DRUM BODY - shaped like a large, wide wheel to transport drinking water by rolling.1-6 Change 5
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