| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage structure wherein when lubricating oil is to be drained by removing a screw-type drain plug from a drainage port provided in a transmission case and the like, the lubricating oil is inhibited from bursting out of the drainage port. SOLUTION: When, in a maintenance work and the like, the lubricating oil F in the transmission case 13 is discharged from the drainage port 33 provided in the transmission case 13, outflow of the lubricating oil F is started from an outflow groove 33a made in the drainage port 33, before the screw-type drain plug 34 is removed out of the drainage port 33 completely. COPYRIGHT: (C)2009,JPO&INPIT
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