The Operation of Clutch When engaged: The oil flows into the clutch cylinder block from the control valve of gearbox via the oil hole inside the shaft to push the piston (10). The main and auxiliary friction disc are engaged when pushing the piston, which make the clutch case (4) and clutch gear to form one integer to transmit the power. When disengaged: The oil pressure applied into the piston (10) is reduced when the control valve of gearbox cut the oil supplied to the clutch. The piston returns to the original position via the spring (5), which separate the clutch case (4) from clutch gear (7).
When the clutch is disengaged, the oil inside the cylinder block is drained by the centrifugal force via the discharging oil opening to prevent the separation of clutch is not complete. 20-30