HYDRAULIC CLUTCH STRUCTURE IN FARM WORKING MACHINE

摘要

PURPOSE:To prolong a span of service life in a clutch, by installing a valve mechanism interposingly in an oil passage operating the clutch, while disengaging the clutch automatically at a time when working oil pressure drops. CONSTITUTION:Working fluid out of a hydraulic pump 25 to be driven by engine output is fed to a hydraulic transmission mechanism and two hydraulic clutches 19 and 23 via a valve mechanism B. And, this mechanism B cuts off the feed of working fluid when working oil pressure out of the hydraulic pump 25 becomes dropped whereby it prevents the hydraulic transmission mechanism and these hydraulic clutch mechanism 19 and 23 from coming into a half-clutch state. Therefore, a clutch is automatically disengaged so that its service life is prolonged.