TM 9--2350--292--20--10005 00--16THEORY OF OPERATION -- CONTINUED0005 00EXHAUST SMOKE GENERATING SYSTEMThe exhaust smoke generating system consists of a solenoid valve (1), two switch assemblies (2), a manual shutoffvalve (3), an indicator light (4), fuel tube assemblies (5), mounting brackets, electrical leads and attaching hard-ware.The solenoid valve (1) and fuel tube assemblies (5) are attached to the rear of the engine. Fuel to operate thesmoke generating system is taken from the main fuel supply at the front of the engine.The switch (2) to operate the smoke generating system is installed in the driver’s compartment and commander’sstation and is connected to the main wiring harness using electrical leads provided in the smoke generating systemkits.The smoke generating system uses the engine fuel pump to supply fuel from the vehicle fuel tanks to a solenoidvalve (1) mounted at the rear of the engine. When the solenoid valve (1) is energized (opened) it allows fuel to besprayed into the exhaust system (6). The fuel vaporizes and exits with the engine exhaust gases. The fuel vaporcools on contact with the moving exhaust air and condenses to form a dense smoke screen. The electrical powerto energize the solenoid valve (1) is supplied by the warning indicator and warning horn systems. The warning hornwill not sound unless the engine is running. Connection to this system prevents accidental activation of the smokegenerating system when the engine is not running.The manual fuel shutoff valve (3) can be used to determine if the smoke produced is from a malfunctioning engineor from the smoke generating system.242553156556
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