| 摘要 |
A power transmission unit comprises a transmission casing shaped to conform with a change-speed gearing contained therein, the change-speed gearing including an output mainshaft rotatably supported from the rear end wall of the casing, and an extension housing secured in a fluid-tight manner to the rear end wall of the casing to form a lubricant chamber in open communication with the interior of the casing through the upper portion of the wall. In the transmission unit, an oil flow control device is provided in the bottom wall of the transmission casing to transfer lubricating oil into and from the lubricant chamber. |
