Hey there, fellow lift operators, small construction business owners, and anyone who’s ever stared at a dead scissor lift in the middle of a job site—raise your hand if you’ve been there. I run a used scissor lift business, and I’ll be real with you: over the past 12 years, I’ve fielded more “my lift won’t budge” calls at 7 a.m. on a Monday than I can count. Most of the time, it’s not some catastrophic engine failure or a part that costs more than the lift itself. It’s a small, easy-to-miss issue that even a newbie can fix if you know where to look. Used Scissor Lift
I’m gonna walk you through the exact troubleshooting steps I teach every tech on my team, no fancy jargon, no unnecessary hoops. Let’s start with the most obvious stuff first because 80% of dead used lifts out there die for super simple reasons. If you skip these, you’ll waste hours tearing into the hydraulic system when all you needed to do was jiggle a key or top up the gas.
First step: Confirm the power source is actually working. This isn’t rocket science, but you’d be shocked how many guys show up to a job site, jack their chest, and start yelling about their “broken” lift only to realize the key was left in the accessory mode (not full power) all weekend. Let’s break this down by power type because used scissor lifts run on three main things these days: gas, diesel, or electric batteries.
If your lift is gas or diesel-powered: First, check the fuel gauge. I know, I know—too many people just assume it has gas because it was working last week. But used lifts sit, and gas goes bad in like 30 days, especially if the tank isn’t topped off or you added ethanol (which is garbage for small engines). Crack the fuel cap first, then pull the air filter housing off the carburetor (it’s like two bolts, no tools needed sometimes) and peek inside. If there’s goopy, brown gunk instead of clear, thin fuel, that’s your problem. Drain the old fuel, add a stabilizer to the new gas, and crank it. Also, check the fuel filter—they’re cheap, like $10, and if it’s clogged with that old fuel, no gas gets to the engine. Another quick check: the battery that runs the starter. Used lifts often sit unused for weeks, and if you left the lights on or the key in the on position, the battery dies. Use a multimeter if you have one; if it reads below 12 volts, jump it with a standard car battery (don’t use a truck battery, it’s too powerful for small lift starters) and see if it turns over.
Now, if your lift is electric—way more common for indoor job sites or warehouse work—this is where most people mess up. Electric used scissor lifts run on 24V, 36V, or 48V battery packs made of individual 6V or 8V deep-cycle batteries. First, check the main disconnect switch, that little big red knob on the side of the base unit. I can’t tell you how many times a renters or used lift owner accidentally bumped it and didn’t even notice. Turn it all the way to the “on” position, then check the charge indicator light on the control panel. If it’s dim or not on at all, pull the battery pack out (it slides out on rails, just two latches) and check each individual battery cell. Look for any that are leaking, bulging, or have broken terminals. Used batteries get weak fast—especially if the previous owner never charged them all the way. If one cell is bad, you don’t have to replace the whole pack, just that one cell (I always tell people that instead of dropping $1,500 on a new battery pack, swap out a $25 cell if you catch the issue early). Also, check the charging port: sometimes dirt or crumbs get in there, so if you plug in the charger and it doesn’t click or light up, a quick blast of compressed air fixes that.
Okay, power checks done, and it still won’t move. Next step: safety overrides. This is the next most common culprit, and it’s so easy to miss. Used lifts have a million safety features that people accidentally trigger, especially if they’re borrowing the lift or not used to the model. First, check the platform controls vs. the base controls. Most newer used scissor lifts have two control stations: one on the platform where the operator stands, and one on the base for service or moving the lift around the job site. There’s a little switch that toggles between them, and if it’s stuck in the middle or flipped to base when you’re trying to drive from the platform, that’s a no-go. I’ve seen guys spend 2 hours troubleshooting only to flip that tiny switch back to platform mode.
Another safety override: the emergency stop button. That big, red mushroom-shaped button is on every used lift I’ve ever sold. If someone bumped it, or it got pressed while the lift was lowering, it cuts all power to the drive system. Don’t just press it and assume it’s reset—twist it clockwise hard until it pops back out. If it was pressed all the way in, it might be stuck, so wiggle it a little as you twist. Also, check the tilt sensor. Most used lifts have a sensor that cuts power if the lift is tilted more than like 5 degrees for drive safety. If you parked the lift on uneven ground (like a soft dirt spot or a ramp), that sensor triggers and locks the drive. Use a level (or even your phone level app) to check the base of the lift—if it’s tilted too far, drive it back to flat ground, turn the key off, wait 10 seconds, turn it back on, and it should reset. Pro tip: always put used lifts on level ground when storing them, I can’t tell you how many calls I get about tilt sensor issues on lifts that were left on a slight incline for a month.
Okay, power is good, safety overrides are off, and it still won’t move. Now we get to drive system checks, which are still pretty simple for most used scissor lifts—most have either a hydraulic drive system or an electric motor drive, no fancy stuff. First, check the drive wheels. Used lifts roll around job sites with nails, gravel, mud, you name it, so it’s super common for a stone to get wedged between the wheel and the axle, or for a nail to puncture a tire (if it’s a pneumatic tire, common on older used lifts). Even solid rubber tires can get debris stuck. Shut off the power, pull the key, and crawl under the lift to check both drive wheels (usually the back two). Spin each one by hand—if it’s stuck, clear the debris. If it’s a flat tire, that’s a quick fix too: a lot of used lift tires have a valve stem, so you can add air, or if it’s a solid tire, just replace the wheel ($50-$100, way cheaper than a whole motor).
If the wheels spin free, next check the hydraulic system (if your lift is gas/diesel or hydraulic drive electric). Wait, before you go pulling hoses—check the hydraulic fluid level first. Used lifts that sit low on fluid don’t have enough pressure to power the drive motor or the lift mechanism. Find the hydraulic reservoir, it’s a metal tank on the side of the base, usually with a dipstick labeled “hydraulic fluid.” Make sure the lift is on level ground, pull the dipstick, wipe it off, reinsert, pull it again. If it’s below the “full” line, top it off with the correct fluid—don’t use motor oil, that’s a rookie mistake I see all the time. Use AW32 hydraulic fluid, it’s the standard for most used scissor lifts, and you can get a gallon for like $15. Also, check the fluid for any signs of contamination—if it’s milky white (that means water got in) or has metal shavings (that means a pump or motor is worn), you might have a bigger issue, but 9 times out of 10, it’s just low fluid.
If the fluid is good, check the hydraulic filter. Clogged filter means no flow to the drive motor. The filter is usually near the reservoir, a can-shaped thing held on by two bolts. Replace it, it’s $20, and that’s a quick fix. If that doesn’t work, maybe the drive control valve is stuck. The valve is a small lever or solenoid that directs fluid to the left or right drive motor. It can get clogged with gunk from old fluid, especially in used lifts that weren’t maintained. You can try tapping it gently with a rubber mallet (don’t use a metal hammer, you’ll damage it) while someone tries to move the lift. If that works, you might need to flush the hydraulic system and change the fluid soon, but that’s way better than replacing a $1,000 pump.
Now, if you have an electric drive lift (no hydraulic components for movement), this is the other common scenario. If power is good and wheels spin free, check the drive motor connections. The motor is usually at the back of the lift, connected to the battery pack with big, heavy cables. Over time, those cables can get corroded from dirt or oil, or they can get loose from vibration on the job site. Turn off the power, disconnect the battery, then disconnect the motor cables. Wipe the terminals with a wire brush to get rid of corrosion, re-tighten them, and try again. Also, check the limit switches on the drive system—small switches that stop the motor if the lift is all the way forward or back. Sometimes they get bumped and get stuck in the “off” position. You can test them with a multimeter, or just jump the wires temporarily to see if the motor turns on (if it does, replace the switch for like $30).
I should also mention a couple of weird, rare issues that I’ve seen on used lifts, just so you don’t waste your time on them. One is the control panel fuse. Fuses blow, and if the drive circuit fuse is blown, the lift won’t move. It’s a small, glass or plastic fuse in a box near the battery or control panel, and it costs $2. Just replace it, make sure you use the same amp rating (don’t put a bigger fuse in, that’s a fire hazard). Another weird one is a broken pin in the scissor arms. Wait, how does that make the lift not move? A lot of newer lifts have a interlock pin that connects the scissor arms to the base, and if that pin is bent or missing, the lift’s control module cuts power to the drive as a safety measure. That’s more common on lifts that were dropped or crashed, so if you’ve had an accident with the lift, check those pins.
Now, a couple of pro tips from my team’s 10,000+ used lift sales and repairs to make this faster. First, always start with the simplest checks first—90% of the time, it’s power, a safety switch, or a stuck wheel. Don’t crack open the hydraulic system until you’ve ruled out everything else. Second, keep a small emergency kit for your lift on the job site: extra fuses, a small bottle of AW32 hydraulic fluid, a wrench set, and a multimeter. That way, if it dies, you can fix it in 10 minutes instead of waiting for a tech. Third, if you’re working with a used lift that’s more than 10 years old, write down the model number and serial number before you start troubleshooting. A quick Google search of “[model] scissor lift won’t move” will bring up forums and repair guides specific to your exact lift, which is way better than generic advice.
And before I wrap this up, let’s be clear: if you’ve done all these steps and the lift still won’t move, don’t risk trying to fix something you don’t understand. Used lifts are tough, but they’re also expensive to mess up if you get into the electrical or hydraulic systems without knowing what you’re doing.
If you’ve gone through all this and still have a dead lift, or if you’re looking for a reliable used scissor lift to start with (so you don’t have to deal with these issues as often), hit us up. We’ve got a 50-point inspection for every used lift we sell, so you know the power system, drive system, and safety features are all checked before it leaves our yard. We don’t do the “as-is” garbage that costs you a week’s worth of work fixing. Whether you need a small 19ft lift for interior jobs or a 40ft rough-terrain lift for construction, we’ve got options, and our team is always here to help troubleshoot if you run into issues down the line. No pressure, just real help for real job site problems.
Telescopic Boom Lift References:
- OSHA. (2019). Scissor Lift Safety Standards for Power and Drive Systems. Occupational Safety and Health Administration.
- Genie Industries. (2020). Common Troubleshooting for Used Scissor Lifts. Genie Service Support Library.
- International Organization for Standardization. (2018). Safety Requirements for Aerial Work Platforms. ISO 16231-1:2018.
- American National Standards Institute. (2021). Standard for Electric Scissor Lift Battery Maintenance. ANSI/SIA A92.3-2021.
- National Construction Safety Association. (2022). Troubleshooting Hydraulic Drive Systems for Used Heavy Equipment. NCSA Technical Bulletin.
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