TM 5-4310-451-142-2.CONTROLS AND INDICATORS (Con’t).KeyControl or IndicatorFunction9Cold Start ValveAllows engine to run at unload speed (low pressure) until properlywarmed up. Used for cold weather starting.10Engine Override ButtonBypasses oil pressure switch when starting engine.11Master Battery SwitchProvides power for instrument panel when in ON position.12ON/OFF Engine SwitchEnergizes electrical system when in ON position.13Tach/HourmeterTachometer portion indicates engine revolutions per minute (rpm).Hourmeter portion indicates and records total number of hours ofactual operation.KeyControl or IndicatorFunction14Air Compressor OilIndicates air compressor oil level. Oil level must be present in sightSight Gagegage before operating air compressor unit.15Engine Oil DipstickIndicates level of oil in engine crankcase.TA7046862-3
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