How a Heavy Duty Jack Works

How a Heavy Duty Jack Works

A heavy duty jack is used in various industries to lift and support heavy objects. Different industries, such as construction, manufacturing, and transportation, depend on heavy-duty jacks to move large loads.

Investing in a reliable heavy duty floor jack can save time and effort. Here are the components of a heavy duty jack and how they work together to safely lift heavy objects:


Hydraulic fluid is stored in the reservoir. It acts as a medium to transmit force from one point to another, allowing heavy objects to be easily lifted.

The hydraulic fluid provides pressure to lift heavy objects by creating a force within the cylinder. The buffer tank also stores excess fluid when the jack is lowered.

Plunger Piston

A plunger piston is connected to the jack handle and moves up and down as the handle is pumped. This movement creates pressure within the hydraulic fluid, which lifts the plunger piston.

The plunger piston also pushes the hydraulic fluid into the cylinder, causing it to expand and lift heavy objects.

Release Valve

The release valve controls the flow of hydraulic fluid from the reservoir back to the buffer tank.

Turning the release valve releases pressure from the system, allowing for the smooth lowering of heavy objects. This valve also controls the speed at which the object is lowered.

Check Valve

The check valve is a one-way valve that allows hydraulic fluid to flow in only one direction.

It maintains the pressure created within the system, preventing heavy objects from suddenly dropping or falling. The check valve also plays a role in keeping the hydraulic fluid contained and preventing leaks.

Hydraulic Jack Operating Principle

A heavy duty floor jack works on the principle of Pascal’s law. It states that pressure applied to a confined fluid at any point is transmitted undiminished through the fluid in all directions. When you pump the handle of a hydraulic jack, it creates pressure within the cylinder and causes the plunger piston to lift heavy objects. 

As the fluid’s pressure increases, it moves through the system to a larger piston connected to the lifting mechanism. Due to the larger surface area of this piston, the force applied is magnified, resulting in the jack’s high lifting capacity. The user pumps the handle to lift an object, causing the larger piston to rise.

A valve controls the fluid’s movement in the correct direction and prevents backflow, securing the lifted object in place. The amount of weight a jack can lift depends on its capacity and hydraulic pressure.

Before using a hydraulic jack, know its weight capacity and always adhere to the safety precautions provided by the manufacturer. The jack needs to be on a level ground in the starting position.

Types of Hydraulic Jacks

A jack comes in various types, each designed for specific applications. Different industries utilize these jacks to lift heavy equipment, vehicles, and structures. Here are some common types of hydraulic jacks used in various industries:

Hydraulic Scissor Jack

This type of jack has a compact design, making it easy to store and transport. It uses the scissor mechanism to lift heavy loads. A hydraulic scissor jack is used in an automotive garage, repair shops, and car maintenance centers. It provides a safe and efficient way to lift vehicles for repairs or maintenance.

Hydraulic Bottle Jack

A hydraulic bottle jack is a portable and lightweight type of jack. It has a cylindrical body with a flat base and can lift heavy loads in tight spaces.

This jack is commonly used in farms and construction due to its compact size and high lifting capacity. The bottle jack is also used to lift heavy machinery and equipment for repairs.

Hydraulic Transmission Jack

This type of jack is specifically designed to lift and support transmissions during repairs. It has a flat base with wheels, which makes it easy to maneuver under vehicles.

A transmission jack is commonly used in automotive shops and repair centers. The jack’s design allows technicians to easily access and work on the transmission without removing it from the vehicle.

Hydraulic Floor Jack

A hydraulic floor jack is a heavy-duty jack used in automotive repair shops, garages, and car maintenance centers. It has a long handle for easy pumping and a wide base for stability. A floor jack can lift vehicles of several tons and is used for tire changes, oil changes, and other routine car maintenance tasks.

Invest in a Reliable Heavy Duty Floor Jack

A heavy duty jack works by applying hydraulic pressure to lift heavy loads. They are valuable tools in the automotive, construction, and farming industries as they provide a safe and efficient way to lift heavy objects. Hydraulic jacks come in various types, such as scissors, bottles, transmissions, and floor jacks, each designed for specific purposes.

Regula maintenance of these jacks enhances their lifespan and improves their functionality. Invest in a quality heavy duty floor jack and choose the right type for your needs to promote safety and efficiency in any lifting task.

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