Here are some solution for that situation .
- Either lengthen the stroke of pump. Means increase the pump’s cylinder length.
- Either reduce the area of lifting cylinder.
- Top up the hydraulic fluid and pump again.
By first method you can make available more hydraulic fluid to pump, however, it is not convenient because it makes the jack bulkier, bigger and heavier. So, it is not applicable daily practice.
The second answer, reducing the area of lifting cylinder will reduce the consumption of hydraulic fluid and cause long stroke,
Third solution is best and suitable. we can top up the fluid from a separate supply of fluid and pump again as much we need.
Introduction of hydraulic tank in system
In this diagram, we are seeing a hydraulic tank which provides fluid to the system whenever needed and directed back to the hydraulic tank when it is no longer needed. In this diagram, we also see two flap gate (check valve)
To lift the vehicle, the hydraulic fluid is pumped out of the hydraulic tank and into the lifting cylinder while
But hydraulic tank is not only for storing the hydraulic fluid. In next page we will find more significant purpose of a hydraulic tank.