446D Backhoe Loader Caterpillar

Note: If the sulfur content in the fuel is greater than 1.5% by weight, use an oil with a TBN of 30. With the high sulfur fuel, change the oil and the filter element after every 100 hours or after every two weeks. Otherwise, change the oil and the filter element after every 250 hours or after every month.

Illustration 1	g00105085

The crankcase drain plug is on the right side of the oil pan.

1. Remove the crankcase drain plug and drain the oil into a suitable container. Clean the crankcase drain plug and replace the crankcase drain plug.

2. Remove the engine access panel on the right side of the machine.

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Illustration 2	g00105086

3. Remove the filter element with a strap type wrench.

4. Clean the filter mounting base with a clean cloth. Make sure that the old filter gasket has been removed.

5. Apply a thin film of clean engine oil to the sealing surface of the new filter element.

6. Install the new filter element by hand. When the gasket contacts the filter base, tighten the filter for an additional 3/4 turn.

7. Open the engine access door on the left side of the machine.

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Illustration 3	g00105087

8. Remove the oil filler plug (1). Fill the crankcase with new oil. See Operation and Maintenance Manual, "Lubricant Viscosities" and Operation and Maintenance Manual, "Capacities (Refill)". Clean the oil filler plug and install the oil filler plug.

9. Start the engine and allow the oil to warm. Check for leaks.

10. Stop the engine and allow the oil to drain back into the oil pan. Maintain the oil level in the crosshatched region of the engine oil dipstick (2). Add oil, if necessary.

11. Close the engine access door and replace the engine access panel.