The Guts
The "bottle" jack is equipped with a release valve that allows the pressurized oil to escape through a ported bypass around the two check valves. As the release valve opens fully, the oil rushes back to the reservoir and the main piston falls back down into the main cylinder.
The pump piston connects to a lever that you ploy up and down with a distant bar when you obtain the "bottle" jack placed under your vehicle. The up-and-down business of the lever moves the pump piston up and down within the pump cylinder. As you action the pump piston upward in the pump cylinder, it creates a suction that pulls unbarred the cardinal evaluation valve and draws oil from the reservoir fini the oil ports and up into the pump cylinder.
As you bring the lever downward, the pump piston pushes the oil, closing the first check valve and opening a second check valve from the force of the oil the pump piston is pushing. The pressurized oil pushes through another oil port to the main cylinder where it lifts the main piston upward. As you lift the lever upward once again, the second check valve closes and the first check valve reopens to draw more oil into the pump cylinder, thus repeating the process until the main piston lifts up to the height you desire.
The Release
After you have lifted the main piston and completed the work on your vehicle, it is time to lower the main piston.Inside the "bottle" jack is an inner working gadget that is comprised of a reservoir, a leading cylinder, a leading piston, a pump piston, pump cylinder, research valves, a Proceeds valve, oil, oil ports and many seals to prevent air or oil leakage in the pressurized action. The evaluation valves are the leading tool of the inner gadget and serve one leading service: to prevent oil within the ports from travelling the fault bag.
