CLUTCH OPERATION DEVICE

PROBLEM TO BE SOLVED: To provide a relatively low cost clutch operation device enabling clutch operation by a clutch pedal even if a trouble of a working fluid supply discharge device occurs. SOLUTION: The clutch operation device is provided with a clutch booster 21 operating a clutch 13 to a disengaging state when working fluid is supplied and operating the clutch 13 to an engaging state when working fluid is sucked, the working fluid supply discharge device 23 provided with a reservoir tank 29c storing working fluid and supplying and sucking working fluid to and from the clutch booster 21 by a command from a controller 22, a clutch pedal device 30 connected to an oil flow passage 31 connecting the clutch booster and the working fluid supply discharge device, supplying working fluid to the oil flow passage 31 by stepping the clutch pedal 30a in and sucking working fluid by recovery of the clutch pedal 30a, and a relief valve 32 re-circulating surplus working fluid from the oil passage to the reservoir tank 29c when working fluid of quantity exceeding predetermined quantity is supplied to the clutch booster 21 provided on the oil flow passage. COPYRIGHT: (C)2006,JPO&NCIPI