14. Mechanical transmission drain.
Remove subfloor plate (see WP 0297 00).
Drain oil from mechanical transmission semiannually or every 1500 miles (2414 kilometers). Start main engine to
operate transmission until warm. Shut down engine and open hull drain valve (20).
Open mechanical transmission and oil cooler drain valve. After oil has drained, close mechanical transmission and oil
cooler drain valve, and close hull drain valves.
Fill mechanical transmission (see step 21).
Install subfloor plate (see WP 0297 00).