M239 Smoke Grenade Launcher System
M239 smoke grenade launcher system malfunctioning.
One or more of the launcher tubes fails to operate. Do steps 1 thru 10.
Ensure all launcher tubes are empty before performing maintenance on launcher system. Serious injury
or death may result if tubes launch accidentally.
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry contacts a metal surface a direct
short may result in instant heating of tools, damage to equipment, and injury or death to personnel.
Remove lens from lamp on M239 launcher power switch box assembly. Remove lamp. Place red lead
of multimeter in lamp socket and black lead to ground. Turn MASTER and ARM SMOKE switches
ON and check for voltage. Turn MASTER and ARM SMOKE switches OFF. If voltage is present,
replace lamp (see WP 0442 00). If voltage is not present, go to step 2.