| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform appropriate change of lubricating oil by suppressing breakage of a drain plug for blocking a drain hole. <P>SOLUTION: The drain hole 36 for discharging the lubricating oil 23 filled in a casing 32 to the outside is opened between bolt head sections 16A of two adjacent mounting bolts 16 of mounting bolts 16 for mounting the casing 32 to a side frame 4. Thus, the drain plug 37 for blocking the drain hole 36 can be sandwiched between two adjacent bolt head sections 16A to be protected, a rock or the like is suppressed from directly colliding to the drain plug 37 during running of a hydraulic shovel, and the drain plug 37 can be prevented from breaking. Thus, the drain plug 37 can be easily removed from the drain hole 36, and appropriate change of the lubricating oil 23 can be performed. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
