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 TM 55-1905-221-14-2
5-18. FUEL INJECTOR (Continued).
uncovered. Consequently, with the rack in this position, all the fuel is forced back into the supply chamber so no injection
of fuel takes place. With the control rack pushed in (full injection), the upper port is closed shortly after the lower port has
been covered thus producing a maximum effective stroke and maximum injection. From this no injection position to full
injection position (full rack movement), the contour of the upper helix advances the closing of the ports and the beginning
of injection.
5-403
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