TM 9-2320-386-10 2-4 Change 1 Key Item and Function 1 Speedometer/odometer indicates vehicle speed in miles per hour (mph) and total distance traveled in miles. Tripmeter indicates distance traveled in kilometers. 2 Tachometer indicates engine speed in revolutions per minute (rpm) and operat- ing time in hours and tenths of hours. Normal idle speed is 750-850 RPM. 3 Engine coolant temperature gauge indicates temperature of engine coolant. Normal operating temperature is 160°-230°F (71°-110°C). 4 Transmission temperature gauge indicates temperature of transmission oil when engine is running. Normal operating temperature is 160°-300°F (71°-149°C). 5 Low air pressure indicator light indicates air pressure in air reservoirs is below 60 psi (414 kPa). 6 Air pressure gauge indicates air pressure in reservoir tanks. Normal pres- sure is 90-120 psi (586-827 kPa). 7 Battery gauge indicates when batteries are charging or discharging. 8 Parking brake indicator light indicates parking brake has been engaged. 9 Fuel gauge indicates fuel level in fuel tank. 10 High beam indicator shows headlights are on high beam. 11 Oil pressure gauge indicates engine oil pressure when engine is running. Normal operating pressure is 35-70 psi (241-483 kPa). 12 Diagnostic Connector Assembly (DCA) connects the Vehicle Test Meter (VTM) to the vehicle’s test points for STE/ICE-R. 2-3. CHASSIS CONTROLS AND INDICATORS (Contd) 1 2 3 4 5 6 7 8 9 10 11 12