What a scissor lift is and why the controls matter
A scissor lift is a mobile platform that raises and lowers using a crisscross mechanism underneath — the hydraulic arms fold and unfold like scissors. You operate it from a control panel, usually a pendant or joystick, while standing on the platform itself. The lift goes up and down only; it does not move horizontally like a boom lift or telehandler.
The controls are straightforward but require respect. A scissor lift can weigh 5,000 to 30,000 pounds depending on the model, and the platform can hold 500 to 1,000 pounds of load. If you misuse the controls — raising it too fast, overloading it, or tilting it — the platform becomes unstable and people fall. Most scissor lift accidents happen because the operator did not understand what the machine was actually doing or did not follow the sequence.
This guide covers the real steps: the walk-around inspection, the startup sequence, raising and lowering safely, and what to do if something goes wrong. It assumes you have already read the manual for your specific model, because controls vary between manufacturers.
Key Takeaways
- Walk around the scissor lift before you use it every time — check for leaks, cracks in the platform, and obstacles around the base that could tip it.
- Lower the platform completely, turn on the engine or battery, and wait for the hydraulic system to build pressure before you raise anything.
- Never exceed the load limit printed on the platform, and never allow the platform to tilt — both cause the lift to collapse.
- Keep both feet on the platform at all times while it is raised, and use the guardrails; jumping or stepping off a raised platform is how people die.
- If the lift stops moving or makes unusual sounds, lower it all the way down and do not use it again until a mechanic inspects it.
The pre-operation walk-around inspection
Before you turn on the scissor lift, walk around the entire machine on the ground. Look for hydraulic fluid leaking from the cylinders or hoses — it will be dark and oily and usually pooled under the machine. Check the platform surface for cracks, rust holes, or missing sections. A damaged platform can collapse under your weight.
Inspect the guardrails and safety gates. They should be intact and move freely. Look at the base — the four corners where the lift sits — and make sure the ground is level and solid. Soft ground, gravel, or a slope will cause the lift to tip. Clear away any debris, tools, or materials within three feet of the base in all directions; these can catch the lift as it rises and cause it to bind.
Check that the emergency descent valve — usually a red lever or button on the control pendant — is accessible and not stuck. Test it by pressing or pulling it slightly; you should feel resistance, not a loose or broken feel. If anything looks wrong, do not operate the lift. Tag it as out of service and report it to your supervisor.
Starting the engine and building hydraulic pressure
Make sure the platform is all the way down before you start. If it is partially raised, lower it completely first using the control pendant. Once the platform is down, check that the emergency descent valve is in the normal position — not activated.
Turn on the engine or battery switch. On electric lifts, this is usually a key switch or a button. On gas or diesel lifts, you may need to prime the engine or let it warm up. Wait 30 to 60 seconds after startup. During this time, the hydraulic pump is building pressure in the system. Do not raise the platform yet.
Listen to the engine. It should run smoothly without grinding, knocking, or high-pitched squealing. If you hear unusual sounds, turn it off and report the problem. Once the engine is running normally and you have waited the full warm-up time, you are ready to raise the platform.
Raising the platform safely
Stand in the center of the platform, away from the edges. Keep both feet flat on the surface. Hold the control pendant in one hand and use the other hand to grip the guardrail. Press or pull the raise button slowly — do not jab it or hold it down hard. The platform should rise smoothly and steadily.
Watch the platform as it rises. It should go straight up without tilting. If you feel the platform tilt or shift to one side, release the raise button when ready and lower the platform all the way down. A tilting platform means the load is unbalanced or the lift has a mechanical problem. Do not try to correct it by shifting your weight.
Raise the platform only as high as you need. The higher you go, the more unstable the lift becomes. If you are working at height, raise it to your working height and stop. Do not raise it to the maximum height just because you can. As you rise, keep your eyes on the platform and the surroundings — watch for overhead obstacles like beams, pipes, or electrical lines that could hit you or the lift.
Working on the raised platform
Once the platform is at working height, keep the engine running. Do not turn it off while you are raised. If the engine dies, you will be stuck and the only way down is the emergency descent valve, which lowers you slowly and may not work if the hydraulic system has failed.
Never step off the platform onto a nearby surface, even if it looks close. The platform can shift or lower unexpectedly, and you will fall. If you need to reach something outside the platform, lower the lift, walk to it, and raise again. This takes longer but keeps you alive.
Keep the control pendant with you at all times. Do not set it down on the platform or hand it to someone else. If someone else needs to operate the lift, they must be trained and authorized. Never allow untrained people to touch the controls.
Lowering the platform and shutting down
To lower the platform, press or pull the lower button on the control pendant. Lower it slowly, the same way you raised it. Watch the platform as it descends. It should come down smoothly and evenly. If it jerks, sticks, or makes grinding sounds, release the lower button and try again. If the problem continues, use the emergency descent valve to lower it the rest of the way, then do not use the lift again.
Lower the platform all the way to the ground. You will feel a slight bump when it reaches the bottom — this is normal. Once it is down, release the lower button and wait a few seconds for the hydraulic pressure to equalize.
Turn off the engine. On electric lifts, switch off the battery. On gas or diesel lifts, turn the key to the off position. Wait for the engine to stop completely. Do not leave the lift running unattended. If you are done for the day, perform a quick visual check — look for leaks or damage that appeared during use — and report anything unusual to your supervisor.
What to do if something goes wrong
If the platform stops moving while you are raised, do not panic. Keep both feet on the platform and stay calm. Press the raise button a few times — sometimes the system needs a moment to respond. If the platform still does not move, use the emergency descent valve. This is the red lever or button on the pendant. Pull or press it and hold it; the platform will lower slowly. Do not release it until you are on the ground.
If the emergency descent valve does not work, you are stuck. Call for help. Do not jump. Do not try to climb down. Stay on the platform and wait for a mechanic or rescue personnel to arrive. This is rare, but it happens, and staying put is the safest choice.
If you hear a loud crack, see the platform tilt sharply, or feel the lift shift suddenly, lower it when ready using the lower button. If the lower button does not work, use the emergency descent valve. Once you are on the ground, do not use the lift again. Tag it as out of service and report the incident to your supervisor and the equipment owner.
Frequently Asked Questions
Can I operate a scissor lift without training?
No. Most worksites require operator certification or documented training before you can use a scissor lift. Training covers the specific model you will use, the hazards, and the emergency procedures. Even if your site does not require it, you should not operate one without understanding how it works and what can go wrong.
What is the maximum load a scissor lift can hold?
The load limit is printed on a label on the platform itself. It varies by model — typically 500 to 1,000 pounds for the platform and everything on it, including you. Do not exceed this limit. Overloading causes the hydraulic system to fail and the platform to collapse.
Can I move a scissor lift while the platform is raised?
No. Scissor lifts are designed to raise and lower only. They do not have drive controls for horizontal movement. If you need to move it, lower the platform completely, then push or drive it to the new location. Never attempt to move a scissor lift with the platform raised.
What should I do if the platform tilts while I am on it?
Release the raise button when ready and lower the platform all the way down. A tilting platform means the load is unbalanced or the lift has a mechanical problem. Once you are on the ground, do not use the lift again until a mechanic inspects it. Report the tilt to your supervisor.
How often should a scissor lift be inspected?
Most worksites require a daily pre-operation inspection by the operator before each use, and a more thorough inspection by a certified technician every month or every 40 hours of operation, depending on local regulations and the equipment owner's policy. Check your site's maintenance schedule.