VALVE 9B1320 - Caterpillar

Oil Pressure Reading
The oil pressure reading shows the engine lubrication system pressure in pounds per square inch (psi). The oil pressure reading should be checked frequently to ensure that the system is functioning correctly. Should the pressure fluctuate or drop, stop the engine, and find out the cause. Do not operate the engine at lower than normal oil pressure (see maintenance interval schedule for minimum engine oil pressure).CAUTION: Do not continue to operate your engine below the normal operating range. Severe engine damage could occur.Temperature Reading
The coolant temperature reading will indicate overheating which may arise from low coolant level, plugged radiator, loose fan belt, or faulty thermostat. Coolant level should be checked and serviced.Voltage Reading
The voltage reading indicates the battery charging voltage. If the meter consistently indicates fewer than 13 volts, or more than 15.7 volts under normal operating conditions, you should have the engine electrical system checked by a qualified service technician.Tachometer/Hourmeter
The tachometer indicates the engine speed in hundreds of revolutions per minute (rpm). The tachometer serves as a guide to insure that engine speed is set correctly.The hour meter records the hours of operation and is used to determine when periodic maintenance is required.