TM9-2320-361-10 2-4. CHASSIS CONTROLS AND INDICATORS (Contd) Key Item and Function 12 13 14 15 16 17 18 19 20 21 22 Oil Pressure Gage indicates oil pressure when engine is running. Normal pressure is 10-75 psi. Speedomtfer/Odometer indicates vehicle speed and total mileage. Tachometer indicates engine speed in revolutions per minute (rpm) and operation time in hours and tenths of hours. Engine Coolant Temperature Gage indicates temperature of engine coolant. Normal operating temperature is 180°-200°F. Map Compartrrent provides storage for manuals, forms, and maps. Air Pressure Gage indicates pressure in air reservoir tanks. Normal pressure is 85-120 psi. Battery/Generator Gage indicates when the battery is charging or discharging. Front Wheel Drive Lever engages/disengages front wheel drive power. Front Wheel Drive Indicator Light shows when front wheel drive is operating, Fuel Lever Gage indicates fuel level in fuel tank. High Beam Indicator shows when headlights are on high beam. 2-3