Engine: Steam Plants

1. A Oil is pressure fed through internal drilled passages which force oil to the gear's periphery.
2. B Oil rings in channels outside the gears dip into oil in the sump and carry it to the gear teeth.
3. C Oil is sprayed through nozzles at the point of gear mesh.
4. D The gears run through an open oil sump and oil is carried along on the gear teeth.

Tip: press A-D to answer