TURBO GP-BASIC 20R8539 - Caterpillar

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Open the lower rear access door on the right side of the machine.
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Remove the engine oil level gauge and clean the gauge with a clean cloth. Reinsert the gauge completely and remove the gauge again. This will give a more accurate measurement of the oil level.
When the engine is running at low idle, check the "LOW IDLE" side of the engine oil level gauge. Maintain the oil level between the "ADD" mark and the "FULL" mark. When the engine is stopped, check the "ENGINE STOPPED" side of the engine oil level gauge. Maintain the oil level between the "ADD" mark and the "FULL" mark.
If necessary, remove the filler cap and add oil.
Make sure that the engine oil level gauge and the filler cap are installed securely.
Close the lower rear access door.