| 摘要 |
PROBLEM TO BE SOLVED: To fit a line filter directly to a base unit without a bracket and an external pipe, and easily cope with alteration in its fitting position. SOLUTION: A filter fitting part FB provided with an oil feed port 305, connected to a pump and a return port 306 connected to a pressure switch 50 is provided in plural portions of the base unit, a joint wall opposite to the filter fitting part FB is formed on the line filter 60 side, and the joint wall is provided with a primary side port 604 and a secondary side sub-port 605 disposed opposite to the oil feed port 305 and the return port 306.
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