A solid two post pm checklist is the difference between a lift that runs for fifteen years and one that surprises you with a cable snap or a locking pawl that won’t release on a Friday afternoon. We install and service two post lifts all over Iowa, and almost every emergency call we get traces back to a preventive maintenance item that got skipped for one too many months. This article walks through the exact two post pm checklist our techs run when we’re on site, so you can build the same habit into your shop’s routine before something breaks instead of after.
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Why a Written Two Post PM Checklist Beats Memory
Every shop owner tells us their techs “know what to look for” on a lift, but memory fails under deadline pressure, and a rushed glance is not the same as a documented inspection. A written two post pm checklist forces someone to physically look at each cable, each anchor bolt, and each safety lock, and to sign off that they did it. That signature matters more than people think — if a lift ever fails and OSHA or an insurance adjuster asks for maintenance records, “we checked it” isn’t an answer, but a dated, signed checklist is.
We hand every customer a printed two post pm checklist at installation, and we tell them the same thing: this isn’t paperwork for paperwork’s sake, it’s the cheapest insurance policy in the shop. A ten-minute inspection once a month catches frayed cable strands, loose anchor bolts, and worn arm pins long before they become downtime. Shops that skip this step almost always end up paying more later, either in a failed lift, a missed inspection, or a liability claim nobody wants to explain. Build the habit now, on your schedule, not during an emergency.
Cables and Sheaves: The First Stop on Any Two Post PM Checklist
Cables are the item most likely to get overlooked because they’re tucked up inside the columns where nobody looks unless they’re told to. Every two post pm checklist should start here: pull back the boots or covers, run a gloved hand along the visible cable length, and feel for broken strands, kinks, or flat spots. Any fraying at all means the cable gets replaced — there’s no partial-credit answer on this one, because a cable under load doesn’t fail gradually, it fails all at once.
While you’re in there, check the sheaves the cables ride over. A sheave with a flat spot or a bent groove will chew through a new cable in a fraction of the time a healthy sheave would. We also check cable tension and equalization on both columns; uneven cables mean one side is doing more work than the other, which accelerates wear and can throw the carriage off level under load. If you’re not sure what healthy cable versus worn cable looks like, we carry replacement cables for every major lift and can walk you through it over the phone.
Locking Pawls and Safety Latches
The mechanical locks on a two post lift are what actually hold the vehicle up once it’s raised — the hydraulics lift it, but the locks bear the load. A two post pm checklist that skips the locks is skipping the single most important safety component on the lift. Run the carriage up and down through several cycles, listening for the pawl to engage cleanly at each notch, and confirm it fully releases when you pull the release handle or cable.
A lock that hangs up, engages late, or doesn’t fully disengage needs attention before the lift goes back into service. We’ve seen techs work around a sticky lock for weeks by yanking the release harder, which is exactly the habit that leads to a lift dropping unexpectedly. Lubricate the pin and pivot points per the manufacturer’s schedule, and if the pawl spring looks weak or the notch teeth show wear, replace them. This is a cheap part and a five-minute job compared to the alternative.
Hydraulic System: Fluid, Hoses, and Cylinder Seals
Every two post pm checklist needs a hydraulic section, because a slow leak today is a stalled lift tomorrow. Check the fluid reservoir level against the manufacturer’s mark, and look at the fluid color and clarity — cloudy or milky fluid can mean water contamination, and dark, burnt-smelling fluid means it’s overdue for a change. Inspect hoses for cracking, bulging, or wet spots along their length, especially near fittings where flexing causes the most wear over time.
Cylinder seals are the other half of this section. A cylinder that drifts down slowly overnight, or that takes longer to reach full height than it used to, is telling you the seals are wearing out. We stock rebuild kits and full replacement cylinders for the brands we install, and catching a slow leak early usually means a seal kit instead of a full cylinder swap. Don’t ignore drift — it only gets worse, and it’s one of the more expensive repairs to defer.
Arms, Pads, and Pins
The arms and pads are what actually touch the vehicle, and worn components here show up as wobble, uneven lifting, or arms that won’t stay in position under load. A two post pm checklist should include checking arm pins and bushings for excessive play, confirming arm restraints lock securely once the vehicle is positioned, and inspecting rubber pads for cracking, tearing, or compression that’s lost its cushioning.
Pads seem minor until one slips off a pinch weld mid-lift, which is a genuinely dangerous moment for whoever’s underneath. Replace pads on a schedule rather than waiting for visible failure, since rubber degrades from UV and chemical exposure even when it looks intact. Arm pin wear is less obvious but just as important — excessive play in the pin lets the arm shift under load, which throws off your lift points and can damage the vehicle as much as the lift itself.
Anchor Bolts and Concrete Condition
A two post lift is only as stable as the floor it’s bolted to, and anchor bolts loosen over time from vibration, thermal cycling, and repeated loading cycles. Every two post pm checklist needs a torque check on all anchor bolts against the manufacturer’s spec, done with a calibrated torque wrench, not a guess. While you’re down there, look at the concrete itself for cracking, spalling, or gaps forming around the anchor sleeves — concrete that’s degrading around an anchor is a foundation problem, not a bolt problem, and no amount of retorquing fixes it.
We get calls every year from shops that noticed a lift “feels different” only to find anchors backed out a quarter inch or more. Catching that during a scheduled PM instead of during a lift cycle is the entire point of doing this on a calendar rather than reactively. If your concrete doesn’t meet the thickness or cure-time specs for your lift’s rated capacity, that’s a conversation to have with us before it becomes a bigger problem.
Building a PM Schedule Your Shop Will Actually Follow
The best two post pm checklist in the world does nothing if it sits in a drawer. We recommend a quick visual check before first use every shift, a documented monthly inspection covering everything above, and an annual full inspection ideally done by a certified technician who can catch things a daily user might miss. Assign the monthly check to a specific person by name, not “whoever’s free,” because shared responsibility usually means nobody’s responsibility.
Keep the completed checklists on file for at least a year — insurance carriers and OSHA both may ask for them, and having a clean paper trail protects your shop if anything ever goes wrong. If you’d rather have a professional handle it, we run scheduled PM visits across Iowa on Rotary and Challenger equipment and can set up a recurring service plan so this never falls through the cracks. Pair your own routine with our two post safety inspection checklist and the two post install checklist for a complete lifecycle approach from day one through year fifteen.
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