ALI Certified Car Lift Mistakes: Arm Restraints and Safety-Cam Engagement

If you’re running an EV specialty shop in West Des Moines and doing regular differential fluid service on electric drivetrains, an ALI certified car lift isn’t optional equipment — it’s the thing standing between your technician and a multi-thousand-pound battery pack coming down wrong. We’ve walked into more than a few shops where the lift itself was rated fine, but the arm restraints and safety-cam engagement were being used incorrectly, or ignored entirely. Auto Lift Services installs and services lifts across central Iowa, and we want to walk through the mistakes we see most often so you don’t repeat them in your own bay.

Myth: Any ALI Certified Car Lift Handles EVs the Same as Gas Cars

This is the biggest misconception we run into. Just because a lift carries ALI certification doesn’t mean every model is set up ideally for EV differential and drivetrain work. EVs are heavier, the weight sits lower and more centered, and the service points — especially rear differential or drive unit access — often require the vehicle to sit at a different height or angle than a standard combustion car. An ALI certified car lift is engineered and tested to a safety standard, but that standard covers structural integrity and lock mechanisms, not which specific configuration is best for your specific EV lineup.

We’ve had EV shops in the West Des Moines area call us after buying a lift based on weight rating alone, only to discover the arm reach or lift height didn’t comfortably clear the battery pack housing for differential fluid changes. Before you buy, tell your installer exactly what vehicles and what specific service tasks you’re running daily. An ALI certified car lift rated for 10,000 lbs is not automatically the right lift for your bay if the arms can’t get under the pinch points on a Mustang Mach-E or an EV pickup. Certification confirms it’s safe when used correctly — it doesn’t confirm it’s the correct configuration for your work.

Mistake: Skipping Arm Restraint Engagement Because “It’s Just a Quick Job”

We hear this constantly: a technician plans to run underneath for five minutes to check differential fluid, so they skip locking the arm restraints because they’re “just going to be under there a second.” This is exactly the scenario ALI’s safety standards are designed to prevent. Arm restraints exist to keep the swing arms from rotating out from under the vehicle if there’s any shift in weight distribution, vibration from another lift running nearby, or accidental bump. On heavier EVs, that shift can happen fast and without warning.

Every ALI certified car lift we install comes with a restraint mechanism on each arm specifically for this reason. Making it standard procedure — every job, every time, no exceptions — protects your techs and your liability. We tell every shop we train: if locking the restraints takes ten extra seconds and skipping it once ends your career, the math isn’t close. Build it into your shop’s written safety procedure, not just verbal instruction, so it survives turnover.

Mistake: Ignoring Safety-Cam Engagement Sounds or Assuming They’re Automatic

The mechanical safety locks — often called safety catches or cams — on a two-post lift are there to catch the carriage if hydraulic pressure fails. Many techs assume these engage automatically without any action required, and on some lifts that’s partially true, but the engagement still needs to be verified audibly and visually every single time. We’ve seen technicians lower a vehicle onto the arms without confirming the cam clicked into a locked notch, especially on older lifts or lifts due for maintenance where the ratchet mechanism has worn.

Part of what separates a properly maintained ALI certified car lift from a liability is regular inspection of these safety mechanisms. Cams wear, springs weaken, and lubrication breaks down over time, especially in Iowa shops running lifts daily through temperature swings between a heated bay and a cold overnight shop. We recommend a monthly visual and audible check as part of routine maintenance, and an annual inspection by a trained technician to confirm the mechanical locks are functioning to the original certified spec.

What ALI Certification Actually Covers (and What It Doesn’t)

ALI certification means a lift has been tested by an accredited third party against ANSI/ALI ALCTV standards covering structural strength, hydraulic and mechanical safety systems, and stability under rated load. It’s a meaningful, independently verified mark — not a marketing sticker. But certification is tested at time of manufacture under controlled conditions. It doesn’t monitor how the lift is installed, how often it’s inspected, or whether your technicians are using the arm restraints and safety locks correctly on the shop floor every day.

That’s the gap we try to close for every shop we work with. We sell and install ALI certified lifts, but we also train your team on correct daily use, because the certification protects you fully only when paired with correct operation. A perfectly certified lift used carelessly is still a hazard. A well-maintained, properly used lift that’s a few years old and slightly worn is often safer in practice than a brand-new certified unit run by an untrained crew.

Why EV Differential Work Raises the Stakes on Lift Safety

Differential fluid service on an EV drivetrain often means working directly beneath or very near the heaviest single component on the vehicle — the battery pack or drive unit. Unlike a traditional oil change where you’re mostly clear of major mass, differential and drive unit access frequently puts your technician’s upper body directly under thousands of pounds. This is precisely the scenario where arm restraints and safety-cam integrity matter most, because there’s very little margin for error if something shifts.

We’ve talked with EV specialty shops in the West Des Moines area who upgraded from older two-post lifts specifically because they wanted the added confidence of current ALI certification paired with fresh, unworn safety hardware. That’s a reasonable move if your daily work involves this kind of exposure. It’s not about distrust of older equipment — it’s about matching your equipment’s condition to the actual risk profile of the work you’re doing every day.

Building a Shop Habit Around Restraint and Cam Checks

The shops that avoid arm restraint and safety-cam mistakes long-term are the ones that make the check a habit rather than a judgment call. We recommend posting a simple checklist near each lift: engage restraints, confirm both safety cams audibly clicked, verify the vehicle is centered on the arms, and confirm full weight is off the hydraulic cylinder before anyone goes underneath. It takes less than a minute and it removes the temptation to skip steps on busy days.

We also recommend logging every inspection, even informal daily ones, in a simple binder or shared spreadsheet. If an incident ever happens, that log is what shows you were operating a properly used ALI certified car lift rather than one that had been neglected. It protects your shop legally and it builds a genuine safety culture your techs carry with them even when nobody’s watching.

Getting the Right Lift and Training for Your Shop

When we install lifts for EV specialty shops, we walk through the actual vehicles on your lot, the actual service tasks your techs run daily, and match that against arm reach, lift height, and weight capacity before we even talk about which model to order. That upfront work prevents the arm restraint and safety-cam mistakes we’ve described here, because the lift fits the job from day one instead of being a compromise.

We also offer ongoing maintenance plans that include inspection of safety mechanisms on a scheduled basis, so cams and restraints get checked by a trained eye, not just a rushed glance between jobs. If you’re outfitting a new EV bay or replacing an aging lift in West Des Moines or anywhere in central Iowa, talk to us before you buy. We’ll help you land on the right ALI certified car lift the first time and make sure your team knows how to use every safety feature it comes with.