How does a trolley jack work?
How does a trolley jack work? |
||||
 |
Lifting the handle of the trolley jack draws oil into the pump cylinder. | |||
 |
Lowering the handle of the trolley jack pushes pressurised oil to the main cylinder. This causes the main piston to raise. | |||
 |
After pumping the trolley jack several times, more pressurised oil will have entered the main cylinder. | |||
 |
As the pressurised oil lifts the main piston, it causes the arm and saddle to extend, lifting the vehicle. | |||
