How to Use a Hydraulic Floor Jack? | Safe Lifting Steps

Use a hydraulic floor jack only to lift a vehicle, then support it on jack stands before working underneath.

Lifting a car with a hydraulic floor jack seems simple, but the procedure has specific steps that keep you from getting crushed. The jack raises the vehicle; jack stands hold it. Understanding how to use a hydraulic floor jack correctly involves choosing the right capacity, finding the proper lift points, and following a strict sequence. This guide walks you through the process and the critical mistakes to avoid.

How a Hydraulic Floor Jack Works

A hydraulic floor jack uses fluid pressure to lift a heavy load with minimal effort. Pumping the handle forces hydraulic fluid into a cylinder, which pushes the saddle—the flat platform at the top—upward. The release valve, typically a knob or lever at the base, controls the descent. Turning the release valve counterclockwise allows fluid to return to the reservoir, lowering the saddle.

This simple mechanism can lift several tons, which is why the rules around its use are so strict. The jack is a lifting tool, not a support device.

Step-by-Step Guide to Using a Hydraulic Floor Jack

Follow this sequence every time you lift a vehicle. Skipping a step, like chocking wheels, can cause the car to shift or roll.

1. Check capacity and condition. Confirm the jack’s rated capacity exceeds the vehicle’s weight at the lift point. Inspect the jack for leaks, cracks, or damaged wheels.
2. Position the vehicle. Park on a firm, level surface. Set the parking brake and chock the wheels on the opposite side of the lift point.
3. Find the lift point. Consult the vehicle owner’s manual for the approved lifting locations. They are usually reinforced areas along the frame rails.
4. Prepare the jack. Close the release valve completely. Position the saddle directly under the lift point, ensuring the jack is perpendicular to the load.
5. Lift slowly. Pump the handle to raise the vehicle gradually. Stop immediately if the jack shifts, sinks, or the load does not sit centered on the saddle.
6. Place jack stands. Position the stands under the vehicle’s approved support points. Lower the vehicle slowly onto the stands before getting underneath.
7. Lower the vehicle. After the work is done, raise the jack slightly to take the load off the stands. Remove the stands, then open the release valve slowly to lower the vehicle to the ground.

The same steps apply whether you’re changing oil or swapping brakes. The vehicle owner’s manual and the jack’s manual control for exact lift points and capacity limits.

Common Mistakes That Cause Accidents

Most hydraulic jack failures are user errors. These recurring mistakes are the ones to avoid, according to safety guides from sources like the Equipment & Engine Training Council’s published jack safety resources and Washington State’s Department of Labor & Industries.

• Working on a soft or sloped surface. The floor must be firm, level, and able to support the load. Soft ground or asphalt can cause the jack to sink.
• Lifting from the wrong point. The saddle must be centered on a stable, reinforced lift point.
• Forgetting to chock the wheels. The parking brake holds the wheels on the ground, but chocks on the opposite wheels prevent the vehicle from rolling.
• Leaving someone in the vehicle. No one should be inside the car while it is being lifted.
• Moving the vehicle while on the jack. Never attempt to “dolly” or reposition a vehicle while it is supported by a floor jack.
• Relying on the jack alone. The hydraulic jack is only for lifting and lowering. Jack stands are the only thing that should hold the vehicle while you work under it.

If you are in the market for a new unit and need help choosing, our tested roundup of the best hydraulic floor jacks compares capacity and build quality. For the average garage, a 2-ton to 3-ton jack is usually sufficient for passenger cars and light trucks, which is why you see that range most often.

While a hydraulic jack lifts the vehicle, our picks for the best hydraulic floor jacks can help you find a model with adequate lift height and a stable frame. This includes selecting a unit with extra margin above your vehicle’s actual weight.

Lowering the Vehicle Safely

Lowering is as critical as lifting. With the jack stands removed, the release valve is opened gradually—too fast and the vehicle drops violently. Turn the valve knob slowly in small increments to control the descent rate. Once the vehicle is on the ground, disconnect the jack and remove the wheel chocks.