Lubrication of power transfer components

A lubrication apparatus for lubricating one or more power transfer components, the lubrication apparatus comprising:

• a first shaft enclosed, at least in part, by a housing having a first cavity;
• an inboard bearing rotatably supporting the first shaft;
• an inboard bearing cavity surrounding, at least in part, the inboard bearing;
• an outboard bearing rotatably supporting the first shaft;
• an outboard bearing cavity defined, at least in part, by a first internal flange of the housing, the outboard bearing cavity surrounding, at least in part, the outboard bearing;
• an entrance port to the housing, the entrance port being in fluid communication with a lubrication fluid flow source;
• a first flow passage, contained within a wall of the housing, and extending from the entrance port to the inboard bearing cavity;
• a second flow passage, contained within the first shaft, and extending from the inboard bearing cavity to the outboard bearing cavity;
• and
• an overflow port through the first internal flange of the housing, the overflow port extending between the outboard bearing cavity and the first cavity;
• wherein lubrication fluid from the lubrication fluid flow source flows into the entrance port and through the first flow passage, fills the inboard bearing cavity, flows through the second flow passage to the outboard bearing cavity, and drains from the outboard bearing cavity through the overflow port and into the first cavity.