A trolley jack, also known as a floor jack, is a hydraulic lifting device used for raising vehicles off the ground to perform maintenance, repairs, or tire changes. It is a common tool in automotive workshops, garages, and for roadside emergencies.
Trolley jacks operate on a hydraulic system, comprising a pump, cylinder, and release valve. The manual pumping mechanism, facilitated by a handle, increases hydraulic pressure, lifting the load through a lifting arm and secure lifting pad. The trolley, equipped with swivel casters, supports the hydraulic assembly and ensures mobility. A release valve, when turned counterclockwise, allows for controlled lowering of the load, providing a versatile and essential tool for lifting vehicles during maintenance and repairs.