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.|