| 摘要 |
<p>PURPOSE:To supply a sufficient oil pressure by providing an original pressure regulating valve which is between an operation oil pump and an operation oil pressure regulating mechanism and which retains at all times its upper stream side oil pressure at more than a fixed pressure, and taking out pressured oil which is on the primary side and regulated, to a neutral brake and a governor valve side. CONSTITUTION:An original pressure regulating valve 21 which regulates oil pressure on the upper stream, that is, the primary side at all times at more than a fixed pressure, regardless of pressure regulated by means of a sound arresting valve 3 and a clutch oil pressure regulating valve 5, is provided at the middle of a passage between an operation oil pressure regulating valve mechanism consisting of the clutch oil pressure regulating valve 5 and the sound arresting valve 3, and an operation oil pump 1. The is, it is arranged in series with the sound arresting valve 3 and the clutch oil pressure regulating valve 5. And it is so arranged that a sufficient supply of oil pressure to a neutral brake 14 and a governor valve 15 is made by taking out pressured oil which is supplied to the neutral brake 14 and the governor valve 15, from the primary side.</p> |
