Automotive Two Post Lifts: Pre-Purchase Checklist for Farm Shops

A rural farm-shop owner in northern Missouri emailed us a photo of his outbuilding and asked what he needed on a set of automotive two post lifts to safely handle wheel bearing service on his pickups and his neighbors’ trailers. He’d been reading online forums and got tangled up on arm restraint terminology, and he wanted a straightforward pre-purchase checklist that would leave him with a lift he could trust for the next twenty years. At Auto Lift Services we get this call regularly — a rural buyer with a good shop, a real budget, and a real need to get the safety mechanicals right the first time. Here’s the checklist we built for him.

Why wheel bearing service is a specific safety concern

Wheel bearing service on automotive two post lifts involves removing the entire hub and knuckle assembly from a lifted vehicle, then applying pressing force — sometimes several tons of it — to pull the old bearing race and press the new one in. All of that force comes back through the arm assembly, the arm restraint, and the safety cam. If any of those mechanisms have play in them, the vehicle can rock while you’re pressing. Rocking during a hub press is exactly the kind of unpredictable lateral force that walks pads off lift points and causes serious accidents.

That’s why the northern Missouri buyer’s question wasn’t wrong to focus on arm restraints and safety cams. They’re the two mechanisms that hold the vehicle steady during high-lateral-force work. Beyond wheel bearings, the same concern applies to stuck rotors, jammed ball joints, and pressed-in components. Anything that requires an impact hammer or a press tool while the vehicle is up in the air is a test of those mechanicals. A pre-purchase checklist for farm-shop automotive two post lifts always leads with the arm restraint and safety-cam design because those are the mechanisms that matter under load.

Reading the arm restraint spec on a data sheet

Every set of automotive two post lifts ships with a spec sheet, and the arm restraint section is usually two or three lines. What you’re looking for: is it gear-and-pawl or pin-and-hole? Is it continuously variable or discrete? Is the pawl spring-loaded to auto-engage, or does it require a user step? Gear-and-pawl continuous-variable spring-loaded is the design you want. Rotary and Challenger both use this design across their SPO and E series. Some import brands don’t, and their spec sheets sometimes bury the mechanism type in fine print.

If the spec sheet doesn’t clearly state the arm restraint design, that’s a red flag on its own. We tell every buyer to ask the seller directly and get the answer in writing. A reputable dealer will answer that question in one sentence. A less reputable dealer will dodge. For the northern Missouri buyer, we sent him the Rotary SPOA10 spec sheet with the arm restraint section highlighted, and he had the confirmation he needed within an hour. That kind of transparency on mechanism design is standard on the brands we sell. It should be standard on every set of automotive two post lifts, but in practice, it isn’t.

Testing safety-cam engagement on automotive two post lifts

Safety-cam engagement can’t really be tested on paper — it needs a physical check on the lift itself. What we do on every install is raise the lift with no vehicle, listen for the ratchet clicks as the carriage rises, and then release the up button. Clean cams give a firm click into engagement and hold zero movement. Sticky or worn cams either don’t click cleanly, click late, or allow the carriage to drift down half an inch before catching. Any of those is a fail and needs to be addressed before the lift sees a vehicle.

For a rural buyer whose install won’t have our crew on site, we walk them through the same check on video call the day the lift is anchored. It’s a five-minute test, and it’s the difference between a lift you trust for wheel bearing work and one you don’t. For the northern Missouri buyer, we scheduled a video walkthrough on install day, verified the cam engagement on both columns, and confirmed the arm restraint gears seated cleanly. All of that happens as part of the standard install support for automotive two post lifts we sell to customers outside our direct install footprint. It’s not extra — it’s how we do the job.

Slab, ceiling, and electrical — the physical checklist

Once the safety mechanicals are verified, the pre-purchase checklist moves to the building. For rural farm shops, the physical checks are: slab thickness (four inches minimum for 10K, five for 15K), slab reinforcement (rebar or heavy wire mesh, not fiber), slab age (fresh concrete needs at least 28 days cure), ceiling clearance (12 feet for overhead, 10 for baseplate), and electrical (30-amp double-pole 220V, or 60-amp for 3-phase heavy-duty). Rural buildings vary a lot on these numbers.

The northern Missouri buyer’s shop was newer construction — six-inch slab, rebar reinforced, 14-foot ceiling at the peak, and a 200-amp panel with room for a lift breaker. Every physical check passed on the first walk. That’s not unusual for modern pole-barn builds, but older farm shops sometimes have three-inch slabs, no rebar, or a 100-amp service that can’t accommodate a new 30-amp draw. When any check fails, we quote the remediation before we quote the lift, because installing a lift on a bad slab isn’t safe regardless of how good the automotive two post lifts themselves are. Slab first, then lift.

Vehicle mix and capacity — sizing right for farm work

Farm-shop vehicle mixes are broad. A rural buyer might lift a passenger sedan on Monday, a three-quarter-ton pickup on Tuesday, and a small utility trailer on Wednesday. Weights range from 3,000 lbs to 8,000+ lbs. For that mix, a 10K asymmetric is often adequate, but if the shop expects any regular one-ton or dually work, a 12K is worth the modest upcharge for the extra capacity margin. Wheel bearing service specifically is more common on trucks than cars, so the truck side of the mix drives the capacity decision on most farm builds.

Our northern Missouri buyer wanted to handle up to a three-quarter-ton diesel occasionally, which loaded weight-wise came in at 7,200 lbs at the axle. That’s within a 10K’s spec but close to the margin, and for pressing work we like to have more headroom. We recommended a 12K asymmetric, which cost about $800 more than the 10K but gave him a comfortable capacity margin for the heaviest truck he expected. That’s how we size automotive two post lifts for farm-shop customers — enough headroom for the biggest vehicle plus real margin, without overspending on capacity you’ll never use.

Warranty and parts pipeline — the ten-year checklist

The last section of the pre-purchase checklist is warranty and parts. On automotive two post lifts, warranty typically comes in three parts: structural (columns, arms), hydraulic (cylinder, power unit), and labor (install crew). For name-brand lifts, structural runs five years or more, hydraulic runs two years, and labor runs one year. Read the warranty carefully — some brands quietly exclude common wear parts like seals and cables from coverage. Those are the parts most likely to need replacement in year three, so exclusion matters.

The parts pipeline is the checklist item most buyers skip. What you want is a brand whose dealer network stocks cables, hoses, seal kits, safety-cam gears, and arm-restraint parts in your region — not shipped from overseas. We stock all of those for every brand we install. For a farm-shop buyer twenty years into ownership, parts availability is the difference between an overnight repair and a lift out of service for a month. Ask the seller directly: can you get a cable set to me within a week? A yes is standard. Anything else is a warning sign about the brand’s long-term commitment to the market.

Install and turnover — the final walkthrough

The final checklist item is the install itself, and the walkthrough at turnover. For customers outside our direct install radius, we ship the lift with detailed install documentation, coordinate with a local qualified installer if the customer prefers, or walk the customer’s own tech through anchor-set and function-test steps by video. The turnover walkthrough covers arm-restraint engagement, safety-cam function, hydraulic pressure check, and daily and monthly maintenance points. It’s usually a thirty-minute call at the end of install day.

The northern Missouri buyer did his own install with a local electrician for the breaker run and a rented forklift for the unload. Total time from freight arrival to first vehicle lift was three days. He recorded a video of the cam engagement test for our records and confirmed the arm restraint gears seated cleanly. His pre-purchase checklist ran to completion in about two weeks from first call to first vehicle on the pads. That’s a typical timeline for automotive two post lifts sold to remote farm-shop buyers. Call us at 800-674-9302 or browse the 2-post catalog to start your own checklist. Related: our 2-post lift safety features guide.