First-Year Review: Auto Lifts Installed at a Southern Minnesota RV and Restoration Shop

We got the auto lifts installed at a southern Minnesota RV and trailer service shop last spring, and we recently walked back through the first full year with the owner. The shop does frame straightening, aluminum trailer welding, and restoration work on older passenger cars, so the lift bay had to do more than just hold weight. It had to fit a workflow that includes a fabrication table, a MIG welder cart, and a chassis dolly. Vehicles range from 3,500-pound classic coupes to 11,000-pound enclosed work trailers. Here is how that first year played out, from install day through the first real service call, and what we would tell another shop planning a similar build.

Why This Shop Called Us Before Choosing a Model

The owner had already spent two weekends comparing spec sheets on his kitchen table before he called. He had it narrowed to a Rotary SPOA10 asymmetric two-post, a Rotary SPO16-AV four-post, and a Challenger CL10V3 asymmetric. What he actually needed was somebody to translate a spec sheet into what happens when a 34-foot enclosed trailer rolls into a bay that also has to accept a 1972 Camaro on jack stands. Model number soup is worse in the RV and trailer world because manufacturers reuse suffixes across capacity classes and it is easy to talk yourself into the wrong unit.

We walked him through the three things that actually mattered for his mix: drive-through width for trailer axle track, rise height for the metal work he does under the frame, and column footprint against the fab table. The four-post won the pure capacity argument on paper, but a four-post kills the restoration work where you need wheel access. The asymmetric two-post won overall. Getting auto lifts installed correctly starts with this kind of match, not with picking the biggest-capacity unit you can afford to write a check for.

Install Day: Concrete, Anchors, and Ceiling Clearance

Southern Minnesota shops built in the last fifteen years usually have four-inch slabs at 3,500 PSI or better, which is what the Rotary install manual calls for on the SPOA10. This one measured five inches with rebar on 18-inch centers when we cored a test plug. Ceiling clearance was the tighter constraint. The pole barn measured 12 feet 2 inches to the truss chord, and the SPOA10 wants 12 feet clean above the columns. We shaved that with the two-piece column configuration and set the crossbar just below the truss without any wiring conflicts.

Anchor torque was set at 110 foot-pounds on the 3/4-inch by 7-inch wedge anchors, and we verified every bolt with a calibrated wrench on the second pass. The single detail that saves you a callback ninety days later is running that torque check twice. We had the auto lifts installed by lunch on day two and then spent the afternoon on cable routing, hydraulic bleed, and the ALI startup checklist. Nothing dramatic. Dramatic install days almost always mean somebody skipped the pre-check.

The Model Spec Comparison That Actually Made the Decision

Side by side, the SPOA10 and CL10V3 look nearly identical on paper: 10,000-pound capacity, 79-inch rise, asymmetric arms, single-point mechanical safety release. The differences show up in arm restraint style, powerhead pump flow, and parts availability window. Rotary keeps 30-year-old parts on the shelf because their design generations overlap. Challenger runs a tighter revision cycle, which is fine until you need a slider block for a lift built in 2009 and the part number changed three times.

On the trailer side, we compared the SPO16-AV four-post to a Forward CR14 and a Rotary SM122. Capacity was not the tiebreaker. The SM122 wins on drive-through width by four inches, which is the margin between an easy pull-in and a mirror scrape on a wide dually. The owner ultimately kept the four-post option off the table and put the budget into a second two-post the following winter. When we did the spec walk-through in his shop, that second-lift path was already visible on the drawing.

First 30 Days: Break-In, Cable Stretch, and Rack Adjustment

Cable-driven two-posts stretch during the first 20 to 40 duty cycles. The break-in is boring but non-negotiable. We came back at 30 days to re-tension the equalizer cables, verify locking-latch engagement at every notch, and grease the slider blocks with the OEM lithium-complex compound. On the SPOA10 the sync check runs on the powerhead-side column first, then the follower. A lift that clicks unevenly between columns is telling you the cables shifted, not that the mechanism is worn.

The owner also caught something on day 18 that we would have caught at 30: a slight hydraulic weep from the cylinder rod on the follower side. Not a leak, a weep, enough oil to darken the rod, not enough to drip. That is a wiper seal breaking in against the machined rod finish, and it usually stops on its own by cycle 60. It did. Getting auto lifts installed is one job. The 30-day return visit is what turns two machines into a piece of shop infrastructure you actually trust with a customer car.

The First Service Call: Cable Slack at Month Six

Around month six the owner called with a lift that lowered unevenly. Driver side dropped roughly an inch faster than passenger. Classic equalizer-cable stretch beyond the take-up range on the adjustment nuts. We drove up on a Friday morning and had it corrected in under two hours: back off the passenger cable, retension the driver cable to spec, cycle five times, recheck. Total elapsed time from his first call to lift back in service was 26 hours, all in a peak week for his shop.

The reason we mention the call is the follow-up. The owner asked why we did not sell him a cable replacement instead of an adjustment. Cables are consumables, but the failure mode we saw was stretch, not fraying or corrosion. We inspected every strand under a magnifier and found no broken wires. Selling somebody an unnecessary set of cables would have made us three hundred dollars and lost the next four years of service work. That relationship compounds, and it is why we would rather see auto lifts installed correctly the first time than chase parts sales after the fact.

Restoration and Metal Work Reality Check

Restoration bays punish lifts differently than tire shops do. A tire tech loads and unloads twelve times a day. A restoration guy leaves a car up for four hours while he grinds floor pans and welds patches. The load path never changes, and cables that are supposed to cycle constantly instead sit under continuous tension. We saw a little more stretch than typical because of that static-load pattern, and we adjusted the return-visit schedule to 60 days on visit two rather than the standard 90-day interval.

The metal work itself was fine. No arc-strike damage on the columns because he laid down a welding blanket every session, and no grinding-dust intrusion into the powerhead because we specified the shrouded-motor option on the quote. The one thing we would have caught earlier: he was welding directly under the safety latches on the driver side, and spatter tracked up into the notch. We cleaned it out at month six and gave him a heat-shield tip so the pattern would not repeat on the second lift.

What We Would Do Differently on Year Two With Auto Lifts Installed in the Same Building

Two changes if we were quoting the second lift bay today. First, we would run the trench for compressed air and shop electric before the columns went in, not after. The owner ended up cutting a channel across the slab to feed 220 volts to the second position, and that channel now runs under the loaded lift path. It works, but it made the anchor pattern more complicated than it needed to be for a bay that will see the next twenty years of daily use.

Second, we would set the two lifts 14 feet on center rather than 12. The 12-foot spacing looked right on the drawing because the SPOA10 columns are narrow. In practice, a 34-foot trailer up on lift one with the side door open crowds the technician working on a small SUV on lift two. Fourteen feet gives you the elbow room, and you lose nothing in the workflow. When we get auto lifts installed in a first-time shop, we now default to the wider spacing unless the building forces a tighter footprint.