Portable Flame Thrower M2-2

by United States. War Department

(9) To increase the pressure of a dome-type regulator:

(a) Open needle valve No. 1 one full turn. ([Fig 38])

(b) Open needle valve No. 2 one full turn. (There will be slight leakage around the needle-valve thread.)

(c) Open needle valve No. 3 very slowly, watching pressure gage closely. (As pressure builds up in fuel tanks there will be slight leakage through needle valve No. 1.)

(d) When the pressure gage indicates 350 pounds, close needle valve No. 3 tight.

(e) Close needle valve No. 2 tight.

(f) Close pressure-tank valve.

(g) When gage indicates zero, close needle valve No. 1 tight.

(10) To decrease the pressure of a dome-type regulator:

(a) Open needle valve No. 1 one full turn. ([Fig 38])