When an EV specialty shop owner in east-central Iowa called us worried that her lift’s arm restraints were “getting in the way” of a wheel bearing job on a heavier electric SUV, we heard a version of a myth we run into constantly. She’d been told by a previous tech that disengaging the safety cam speeds things up and doesn’t matter as long as the lift is “locked visually.” That’s exactly backwards, and it’s the kind of shortcut that turns a routine wheel bearing service into a serious incident. As an Iowa-based car lift automotive installer and service company, we want to set the record straight on what these safety systems actually do and why skipping them costs shops more than it saves.
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The Myth: Safety Cams Slow Down Wheel Bearing Work
We hear this from busy shops all the time, and EV shops feel the time pressure even more because heavier battery packs mean longer, more careful jobs. The thinking goes that if a tech is confident in their hand signals and floor communication, the mechanical lock is just extra noise. Some techs even wedge or tape the pawl release so it never re-engages, treating the cam like an inconvenience instead of the thing standing between a suspended vehicle and the floor.
The reality is that a safety cam takes a fraction of a second to engage properly on any car lift automotive equipment we install, whether it’s a Rotary or a Challenger two-post. Wheel bearing service specifically involves removing a wheel and hub assembly with the vehicle at full extension, shifting the load and vibration on the lift arms in ways that a routine oil change never does. That’s precisely the job where the cam needs to be doing its job, not disabled. We’ve inspected lifts across east-central Iowa where the locking mechanism had been bypassed for months, and every one of them was an accident waiting to happen.
What Arm Restraints Are Actually Protecting Against
Arm restraints exist because lift arms can swing free once a vehicle is off the ground, and on a wheel bearing job the tech is frequently moving the arm, removing wheels, or repositioning to get at the hub. Without the restraint locked, an arm can rotate under the vehicle unexpectedly if bumped, especially with a wheel already off and the corner unsupported by a tire. On EV platforms, the added weight of battery packs mounted low in the chassis changes where the load sits on the arms, so a restraint that’s slightly loose or improperly seated matters more, not less.
We’ve walked techs through this exact scenario on-site: arm restraint pins that were bent slightly from years of use, still “functional” but not seating fully into the arm bracket. It looked fine at a glance. Under an EV’s actual weight distribution during a wheel bearing pull, that half-seated pin let the arm shift a few degrees. Nobody got hurt, but it scared the shop enough to call us for a full inspection. That’s the kind of near-miss that never makes it into a service log, but it’s common on any car lift automotive equipment that’s overdue for an arm restraint check.
Why EV Wheel Bearing Jobs Are Different
Wheel bearing service on an EV isn’t just heavier, it’s differently distributed. Battery packs sit low and wide, and many EV platforms put more static weight over the rear or split it more evenly than a comparable gas vehicle. That changes how the vehicle sits on the lift arms and how much stress concentrates on one side during a bearing pull, especially if the shop is only working one corner at a time. A car lift automotive setup rated for the vehicle’s gross weight still needs correct arm positioning and pad contact points specific to that EV’s lift points, which are often different from the manufacturer’s gas-model equivalent.
We’ve had EV shops in the Cedar Rapids and Iowa City corridor ask us directly which pad adapters and arm configurations work for their specific models, because generic pad placement can put the load off-center on the arm. That’s not an arm restraint problem by itself, but it compounds one. If the vehicle is sitting slightly unevenly on the arms and the restraint isn’t fully locked, you’ve stacked two risks instead of one. We walk through pad placement with every EV-focused shop we install for, because getting it right the first time avoids callbacks and, more importantly, avoids a dropped corner.
What We Actually Check on a Service Call
When we go out to inspect a lift where arm restraints or safety cams are in question, we check pawl engagement across the full range of arm swing, not just at a couple of test points. We check the restraint pin fit at the bracket, look for wear or bending, and verify the cam release mechanism isn’t sticking or requiring extra force that tempts a tech to bypass it. On older equipment we sometimes find the spring tension on the cam has weakened enough that it doesn’t fully seat under load, which looks fine sitting empty but fails exactly when weight comes onto the arm.
We also check the cables and linkage that connect the release handle to the cam itself, since a stretched or partially frayed cable can make the release feel normal while the cam engagement is inconsistent. This is common on lifts running years of daily wheel bearing and brake work, where the cam gets more cycles than a shop doing mostly oil changes. Any car lift automotive equipment doing heavy repair work, not just tire changes, needs this checked more often than the annual minimum. We flag it during every inspection because it’s cheap to fix and expensive to ignore.
The Real Cost of Bypassing the Cam
Shops that bypass or disable safety cams usually aren’t doing it out of carelessness, they’re doing it because nobody explained clearly what fails when the cam doesn’t engage. The honest answer is that when a lift is unlocked and something shifts, the arm and vehicle can drop suddenly rather than settle gradually. On a wheel bearing job with the wheel off and a tech’s hands near the hub, that’s a serious injury risk, not a hypothetical one. We’ve seen shops treat this as an efficiency tradeoff when it’s actually a liability decision they may not fully realize they’re making.
Beyond the injury risk, insurance and ALI compliance matter here too. A lift inspected and certified with working safety cams is a very different liability picture than one running with a taped-over pawl. If a shop gets audited or something goes wrong, the difference between “followed manufacturer safety procedure” and “bypassed it to save time” is the difference between a covered claim and a shop owner exposed personally. We tell every shop we work with in east-central Iowa the same thing: the thirty seconds a properly engaged cam costs you is not the expensive part of the job.
Training Techs on the Right Habits
Most of the bad habits we see aren’t malicious, they’re inherited. A tech learns from a senior tech who learned from someone else, and if nobody ever explained why the cam matters, the shortcut just becomes “how we do it here.” We run ALI-certified Lift It Right training sessions specifically to break that chain, walking shops and their techs through correct engagement procedure on their actual equipment, not a generic video. For EV shops especially, we spend extra time on how weight distribution changes the stakes on a wheel bearing pull.
We’ve found that once a tech sees an actual demonstration of how quickly an unlocked arm can move under load, versus how little time proper engagement costs, the habit changes fast. It’s not a lecture people resent, it’s a two-minute demonstration that makes the physical risk obvious. Any shop running a car lift automotive fleet, EV-focused or not, benefits from getting techs on the same page at least once a year, ideally as part of a routine annual inspection visit rather than a separate event.
Keeping Your Lift Compliant Long-Term
Long-term compliance isn’t a one-time fix, it’s a maintenance rhythm. We recommend annual inspections at minimum, with more frequent checks for shops doing heavy repair work like wheel bearing and brake service rather than light tire rotation. Between inspections, techs should do a quick visual and audible check of cam engagement every time they raise a vehicle, listening for the pawl clicking into each stop rather than assuming it caught. It takes seconds and catches problems before they become incidents.
If your shop is in east-central Iowa and you’re not sure whether your arm restraints and safety cams are performing the way they should, we’d rather look at it now than after something goes wrong. We service, repair, and stock parts for every major lift brand, and we can usually get out for an inspection or repair quickly. Call us before a wheel bearing job turns into an insurance claim, not after.
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