SECTION III: PRINCIPLES OF OPERATION
1-26 M239 SMOKE GRENADE LAUNCHER SYSTEM
The following callout is found in Figure 1-15.
The M239 smoke grenade launcher system consists of two smoke grenade dischargers (1), canvas covers, a push button
firing switch at the commander's station, two smoke grenade stowage boxes, and an electrical installation kit composed
of a power (arming) switch box, mounting bracket, electrical wiring harnesses, and connectors.
The power (arming) switch box is mounted on a
1 Smoke grenade dischargers
bracket attached to the cab top near the commanders
cupola. Electrical wiring harnesses connect the power
switch box to the push button firing switch,
dischargers, and vehicle current source. The power
switch box consists of an on/off switch to control the
power supply to the firing switch, and an indicator
lamp to show the presence of electrical power.
Figure 1-15. M239 Smoke Grenade Launcher System.