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 and correct the cause of any significant change in the readings. Consult your Caterpillar dealer for assistance.
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If no oil pressure is indicated, STOP the engine. Engine damage can result. |
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Engine Oil Pressure - The oil pressure should be greatest after a cold engine is started. The typical oil pressure for turbocharged engines at rated rpm with SAE 30 or SAE 40 oil is |
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 and maintain the oil level.
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Jacket Water Coolant Temperature - Typical temperature range is |
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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To help prevent engine damage, never exceed the high idle rpm. Overspeeding can result in serious damage to the engine. The engine can be operated at high idle without damage, but should never be allowed to exceed high idle rpm. |
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 discharge in the battery charging circuit. Operation of the indicator should be to the right side of "0"(zero). |
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Fuel Level - This gauge indicates the fuel level in the fuel tank. The fuel level gauge operates when the start switch is "ON". |
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Fuel Pressure - This gauge indicates fuel pressure to the fuel injection pump. If the gauge moves to the "out" position the engine will not operate properly. If the gauge is below |
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Service Hour Meter - This gauge indicates the total number of clock hours that the engine has operated. |