_j._ Insert deflector tube in safety head on left fuel tank. (Fig 11) Outlet should face to rear and at a 45-degree angle to operator’s left shoulder. (Fig 18) Screw in deflector tube by hand; do not use wrench on deflector tube. Tighten lock nut with wrench. _k._ Before use on a mission, test-fire the weapon. (Par 56 _b_) _l._ Save the packing chest for storage of the equipment when flame thrower is not being carried on a firing mission or serviced. 13. USED EQUIPMENT. When they apply, the same steps should be taken as in Paragraph 12. Any worn or damaged parts should be replaced. Areas where paint has worn off should be touched up with fresh paint. Section VI CONTROLS 14. CONTROLS. The firer uses the pressure-tank valve handle, the trigger, and the valve lever and grip safety (Fig 12) in succession as follows: _a. Valve handle._ The pressure-tank valve is operated by turning a handle on the valve flexible shaft within reach of the firer. Counterclockwise operation of handle releases pressure to the fuel tanks. Clockwise turning closes the valve. _b. Trigger._ The trigger is at the front grip of the gun. Pulling the trigger vigorously ignites an incendiary charge in the ignition cylinder. This in turn ignites the fuel as it leaves the gun. The trigger action also causes the ignition cylinder to revolve one-fifth of a turn, presenting another charge for firing. Each of the five charges may thus be used in rapid succession, if necessary, by pulling the trigger vigorously as many as five times. _c. Valve lever and grip safety._ The valve lever and grip safety are mounted on opposite sides of the valve grip of the gun. When both controls are compressed, fuel is propelled from the gun. If either the valve lever or the grip safety is not compressed, the fuel valve remains closed and the fuel remains in the weapon. Section VII OPERATION UNDER USUAL CONDITIONS 15. TRAINING. Effective use of the M2-2 portable flame thrower can be achieved only by diligent practice with the weapon. Untrained firers or assistants should never be sent on a mission. _a. Practice._ Firers should practice under varying conditions of wind, range, elevation, depression, and traverse. The shortness of the total firing time (approximately 8 to 9 seconds) demands split-second judgment and coordination. _b. Use of water in training._ Water may be used (instead of fuel) for elementary practice firing. Ignition cylinders are not used with water. The water under pressure may cause serious injuries to personnel at 10 yards. After practice with water, the gun should be disassembled (Pars 73 through 76), cleaned and dried piece by piece, and lubricated. (Par 49)