| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of reasonably washing by using engine oil hitherto used to wash an oil line and mounting an adapter only to an oil element part. SOLUTION: An engine 1 in Fig 1, and the washing machine of an oil line 6 are mounted on a return line 4, and an adapter 3 having a feed line 5 mechanism is mounted on an oil element mounting part 2. The washing machine 1 of the oil line 6 and the engine 1 are started. As engine oil 7 is filtered, washing liquid is mixed and the engine oil is circulated for washing.
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