CAP AS-FUEL 3380912 - Caterpillar

Your engine may not have the same or all of the gauges as shown in the illustrations. The illustrations shown are of typical gauges.Gauges provide a "look" inside the engine. Be sure they are in good working order. You can determine what is "normal" operating range by observing the gauges over a period of time. The cause of any sudden change or significant change in the readings should be determined and corrected.Noticeable changes in gauge readings are indicative of potential gauge or engine problems. This also applies to gauge readings that have changed significantly but are still within specifications.The cause of any sudden or significant change in the readings should be determined and corrected.Contact your Caterpillar dealer for assistance as needed. Oil Pressure- Indicates engine oil pressure. Oil pressure reading will be greatest after starting a cold engine. Oil pressure will decrease as the engine warms while idling. As the engine speed is increased to full load speed, oil pressure will increase and stabilize. Engine oil pressure minimum is 345 kPa (50 psi). Water Temperature- Indicates engine coolant temperature. The water temperature reading may vary according to load, but should never exceed the boiling temperature for the pressurized system being used. Engine jacket water temperature range is 80° to 100°C (175° to 210°F). Ammeter- Indicates the amount of charge or discharge in the battery charging circuit. Normal operation of the indicator should be slightly to the positive (right) side of "0" (zero).With the engine running, during normal operation, if the indicator is constantly to the negative (left) side of "0" (zero) or shows excessive charge, have the charging system checked for malfunction. Tachometer - Indicates engine rpm (speed). When the governor control lever is moved to the full speed position without load, the engine is running at high idle.When the governor control lever is moved to the full speed position and load is applied, the engine will slow slightly to full load speed.The engine can be operated between these two speed limits for long periods of time without shortening engine life. The high idle rpm and the full load rpm, are stamped on the engine's Information Plate. Fuel Pressure - Indicates pressure of the filtered fuel. As the fuel filter becomes plugged, there will be a noticeable reduction in the engine's performance. The fuel pressure range is 345 to 520 kPa (50 to 75 psi).Low fuel pressure can be an indication of a plugged fuel filter or fuel inlet screen. If fuel pressure is low, replace the fuel filter and clean the fuel inlet screen located on the suction side of the fuel transfer pump.See "Maintenance Intervals" chart for servicing. Service Hour Meter - Indicates the total number of clock hours the engine has operated.