51. BEFORE-OPERATION SERVICE OF TANK GROUP.
The following services are to be performed before filling, charging, and loading the flame thrower with pressure, fuel, and ignition cylinder:
a. Pressure-tank valve. Open and close pressure-tank valve to test for ease of operation.
b. Threaded connections. Check all threaded connections for tightness, using appropriate wrenches.
c. Tank coupling. Examine coupling for cleanliness and ease of movement of lock and cams. ([Par 70]) Clean if necessary. If washer is broken, replace, using screw driver to pry out.
d. Plugs. Check filling plug and safety-head plug for completeness of parts ([Par 69 a]) and cleanliness of threads and seats. Clean, if necessary, with cloth. If rod or rod and chain have broken off and fallen in tank, turn tank upside down and remove. Remove deflector tube from head (using hand, not wrench). Inspect to see if diaphragm is intact. If diaphragm is ruptured, replace the safety head with an unbroken head. ([Par 69 b, c]) Reassemble plug, head, and deflector tube in left fuel tank. ([Fig 11]) Tube 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.
e. Pressure-tank clamp. The clamp should hold the pressure tank tightly in place. If tank is loose, a wooden splint or wedge under the clamp may be used as a temporary expedient.
f. Carrier-frame bolts. Check tightness. Use wrench.
g. Carrier. ([Par 71]) Examine all canvas, webbing, and cord for signs of mildew, rot, or wear. Replace defective parts. Move flame thrower to dryer storage if mildew occurs.
h. Cord (lashing). Check for tightness. If necessary, make tighter and use secure, slip-proof knots. When the tank group is filled with fuel and adjusted on the firer, its weight should be carried chiefly by the canvas and webbing, not by the metal frame.