the hydraulic oil of the main pump is transferred to the sub-pump, prompting the sub-pump to work.
The piston movement of the sub-pump pushes the ejecting rod, and the separating fork disengages the clutch pressure plate and disc from the flywheel to realize the clutch separation and start shifting gears.
When the clutch is released, the pump stops working, the clutch pressure plate and the disc contact with the flywheel, and the power transmission continues. At this time,
the hydraulic oil of the pump returns into the oil can.