... sensor converts the chain tension force into oil pressure, and then a pressure sensor converts ... 4) base plate, (5) spacing bolt, (6) high pressure oil cylinder, (7) suspension, (8) tension pulley, (9) adjusting screw, ... plate, (11) long foot plate and (12) oil injection quick coupler etc. In order to be convenient ... for injecting pressure oil, a quick coupler is used to connect ...