OM3223 Operation - Section 32 Operator Cab and Controls Page 32-15 Tachometer Tachometer (14) registers engine crankshaft speed in hundreds of revolutions per minute (rpm). Voltmeter Voltmeter (19) indicates the volt- age of the 24v battery system. Normal indicated voltage at high rpm is 27 to 28 volts with batter- ies in the fully charged condition. When keys witch (10) is ON and the engine is not on, the voltme- ter indicates battery charge condition. Governed rpm (Komatsu Engine):
Low Idle - 750 rpm High Idle, No load - 1950 rpm Maximum High Idle, Full Load - 1900 rpm Right Turn Signal Indicator Engine Oil Pressure Gauge Right turn signal indicator (15) illuminates to indicate the right turn signals are operating when the turn signal lever on the steer- ing column is moved upward. Moving the lever to its center position will turn indicator off. Engine oil pressure gauge (20) indicates pressure in the engine lubrication system in pounds per square inch (psi). Normal operating pressure after engine warm up should be:
Idle - 138 - 250 kPa (20 to 35 psi) Water Temperature Gauge Water temperature gauge (21) indicates the temperature of the coolant in the engine cooling system. The temperature range after engine warm-up and the truck operating under normal conditions should be: 74° - 91°C (165° - 195°F) High Beam Indicator High beam indicator (16) when lit, indicates that the truck headlights are on high beam. To switch headlights to high beam, push the turn indicator lever away from the steering wheel. For low beam, pull the lever toward the steer- ing wheel. Fuel Gauge Fuel gauge (22) indicates how much fuel is in the fuel tank. Fuel tank capacity is 3217 liters (850 gallons).
Left Turn Signal Indicator Left turn signal indicator (17) illu- minates to indicate the left turn signals are operating when the turn signal lever on the steering column is moved downward. Moving the lever to its center position will turn indicator off. Blank (Not Used) Blank (23) is not used in this truck application. Hourmeter Hourmeter (24) registers the total number of hours the engine has been in operation. Speedometer / Payload Meter Dis- play Blank (Not Used) Speedometer/payload meter display (18) indicates the truck speed in miles per hour (mph), or with optional speedometer, it may indicate truck speed in kilometers per hour (kph). The display also shows payload meter information.
For more information, see Payload Meter in index. Blank (25) is not used in this truck application. Blank (Not Used) Blank (26) is not used in this truck application.