Your engine may not have the same gauges or all of the gauges that are described. For more information about the gauge package, see the vessel's literature from the OEM.
Gauges provide indications of engine performance. Ensure that the gauges are in good working order. Determine the normal operating range by observing the gauges over a period of time.
Noticeable changes in gauge readings indicate potential gauge or engine problems. Problems may also be indicated by gauge readings that change even if the readings are within specifications. Determine the cause of any significant change in the readings. Then, correct any cause of any significant change in the readings. Consult your Caterpillar dealer for assistance.
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Be ready to activate the engine shutoff manually, if there is no oil pressure. Damage to the engine will result if the engine continues to run without the correct oil pressure. |
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| Engine Oil Pressure - Typical oil pressure for this engine at rated speed with SAE 10W30 or with SAE 15W40 is 345 to 600 kPa (50 to 87 psi) . |
A lower oil pressure is normal at low idle. If the load is stable and the gauge reading changes, perform the following procedure:
- Remove the load.
- Reduce engine speed to low idle.
- Check the oil level. Maintain the oil level at the proper amount.
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| Engine Oil Temperature - This gauge indicates the engine oil temperature. Maximum oil temperature at rated speed with a full load is 116 °C (240 °F) . |
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| Jacket Water Coolant Temperature - Typical temperature range is 77 to 91 °C (170 to 195 °F). The maximum allowable temperature with the pressurized cooling system is 99 °C (210 °F). Higher temperatures may occur under certain conditions. The water temperature reading may vary according to load. The reading should never exceed the boiling point for the pressurized system that is being used. |
If the engine is operating above the normal range and steam becomes apparent, perform the following procedure:
- Reduce the load and the engine rpm.
- Inspect the cooling system for leaks.
- Determine if the engine must be shut down immediately or if the engine can be cooled by reducing the load.
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| Tachometer - This gauge indicates engine rpm. When the throttle control lever is moved to the full throttle position without load, the engine is running at high idle. The engine is running at the full load rpm when the throttle control lever is at the full throttle position with maximum rated load. |
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Engine overspeed may cause serious damage. Keep the tachometer indicator in the green operating range. |
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Note: The high idle rpm and the full load rpm are stamped on the Information Plate.
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| Ammeter - This gauge indicates the amount of charge or of discharge in the battery charging circuit. Operation of the indicator should be to the right side of "0" (zero). |
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| Service Hour Meter - This gauge indicates the total number of clock hours that the engine has operated. |
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| Fuel Pressure - This gauge indicates fuel pressure to the fuel injection pump. The indicator should indicate the "NORMAL" range. Minimum fuel pressure is 140 kPa (20 psi) when the engine is under load. A decrease in fuel pressure may indicate a plugged fuel filter. |
