| 摘要 |
<p>PURPOSE:To provide a clutch operating device which improves the responsiveness, and prevents the invasion of dust, the moisture, and the like, to a back pressure chamber perfectly. CONSTITUTION:In a clutch operating device provided with a power cylinder 30 having a power piston 31 driven by a compression air fed from an air reservior 86 to a pressure chamber 33, a relay valve 70 is placed between the air reservior 86 and the pressure chamber 33, and the instruction pressure chamber 73 of the relay valve 70 is connected to one side port of an electromagnetic change-over valve 85, while the other side port of the electromagnetic change- over valve 85 is connected to the air reservior 86. Furthermore, the exhaust port 71d of the relay valve 70 is communicated to the back pressure chamber 32 of the power cylinder 30.</p> |
