CREW CONTROLS AND INDICATORS

DRIVERS CONTROLS AND INDICATORS - Continued - TM-9-2350-267-10_38

Auxiliary Power Unit (APU) Control Box - Continued

TM-9-2350-267-10 Carrier Personnel Full Tracked Armored M113A2 2350-01-068-4077 Carrier Command Post Light Tracked M577A2 2350-01-068-4089 Manual
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TM 9-2350-267-10 CREW CONTROLS AND INDICATORS Auxiliary Power Unit (APU) Control Box FUEL SHUT-OFF Switch This two-position toggle switch controls electrical power to the APU fuel solenoid and APU fuel pumps. When the toggle switch and vehicle MASTER switch are ON, fuel is supplied for operation of the APU. When the switch is positioned to OFF, fuel supply is shut off. The switch should always be turned OFF when APU is shut down. PREHEAT Switch Positioning this switch lever to MOMentary- ON turns on the preheating units in the APU combustion chamber, and supplies power to the START switch. When the switch lever is released, the switch returns to OFF position, the pre- heating units turn off, and electrical conti- nuity to the START switch is broken. APU GEN Switch This two-position toggle switch turns APU generator ON and OFF. Switch must be OFF when starting the APU. 2-5

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