BendPak 4-Post Lift With Jacks: Two Fleet Configurations Compared for Alignment Work

When a small-fleet operator in Sioux City called us about alignment work, the real question wasn’t whether to buy a BendPak 4-post lift with jacks — it was which configuration made sense for a shop running a mixed fleet of pickups, cargo vans, and the occasional box truck. We ended up laying out two distinct setups side by side: a standard runway configuration with rolling jacks, and an alignment-ready version with turnplates and a slip plate kit built in. Both use the same core lift, but the differences in cost, maintenance, and long-term hydraulic upkeep matter a lot once you’re running vehicles across it daily instead of occasionally.

Configuration One: Standard Runways With Rolling Jacks

The first setup is the more common one we install for fleets that need general service capacity — brake jobs, tire work, undercarriage inspection — without dedicated alignment capability. This BendPak 4-post lift with jacks uses straight runways with jacks that travel along a channel, letting techs lift either axle independently once the vehicle is parked and locked at height. For a fleet running mixed pickups and vans, that flexibility covers the bulk of daily service needs without asking the shop to buy a second piece of equipment.

The appeal here is simplicity and lower upfront cost. There’s no turnplate hardware to align or calibrate, and the rolling jacks are the only moving hydraulic component beyond the main lift cylinders themselves. For a shop that sends alignment work out to a specialist and just needs solid drive-on capacity for everything else, this configuration gets the job done reliably and costs less to install and maintain over time. It’s the setup we’d recommend to a fleet operator who does high-volume routine service but doesn’t need alignment on-site.

Configuration Two: Alignment-Ready With Turnplates and Slip Plates

The second configuration adds turnplates at the front and rear slip plates, turning the same basic runway lift into a functional alignment rack. For the Sioux City fleet operator we worked with, this was the deciding factor — sending trucks out for alignment work every time a tire rotation revealed uneven wear was eating hours and money, and bringing that capability in-house meant faster turnaround on the fleet’s own schedule instead of waiting on an outside shop’s calendar.

The tradeoff is added cost and slightly more involved setup. Turnplates need to be properly seated and leveled with the runway surface, and the shop has to budget for the calibration tools and alignment equipment that pair with the lift itself. But for a fleet running enough miles to see regular alignment drift — which is common with trucks doing stop-and-go delivery routes or towing — the payback period on bringing that work in-house is usually short. We walked this particular operator through both configurations before they landed on the alignment-ready build, and the volume of trucks they run made that the clear long-term choice.

Hydraulic Cylinder Seals: The Wear Point Both Configs Share

Regardless of which configuration a fleet chooses, the hydraulic cylinders doing the actual lifting are the component that sees the most wear over years of daily cycling. Seals degrade from heat, contamination, and simple cycle count, and a fleet running a lift multiple times a day puts far more hours on those seals in a year than a typical single-bay shop would in five. Watching for early signs — a lift that settles slightly overnight, or takes longer to reach full height — lets you catch seal wear before it becomes a full cylinder failure.

We stock rebuild kits for exactly this reason, because replacing seals is a fraction of the cost of replacing an entire cylinder, and doing it proactively keeps a fleet’s lift out of the shop for hours instead of days. For high-cycle environments like alignment bays, we generally recommend inspecting seals annually rather than waiting for symptoms, since the cost of a scheduled seal swap is trivial compared to lost bay time during a busy service week. Either configuration of a BendPak 4-post lift with jacks benefits from that same proactive approach — the jacks and turnplates get attention, but the main cylinders are what actually keep the platform in the air.

Rebuild Kits vs. Full Cylinder Replacement: What Actually Makes Sense

Once seals start showing wear, fleet operators usually ask the same question: rebuild or replace. In the vast majority of cases we see, a rebuild kit resolves the issue completely, since the cylinder bore itself rarely wears out — it’s almost always the seals letting fluid bypass internally that causes slow drift or uneven lifting. A rebuild kit with the correct seal sizes for your specific BendPak model gets the cylinder back to full performance at a fraction of the cost and downtime of swapping the whole unit.

Full replacement only really makes sense when the cylinder bore itself is scored or pitted, which usually points to contaminated fluid or a seal failure that went unnoticed for too long. That’s why we push fleet customers toward that annual inspection habit — catching seal wear early keeps you in rebuild-kit territory instead of replacement territory. For a shop running two lifts in different configurations like the Sioux City operator, we set up a staggered inspection schedule so both units get checked without pulling both out of service on the same day.

Cost Comparison Over a Five-Year Window

Looking purely at upfront numbers, the standard rolling-jack configuration costs less to buy and install than the alignment-ready version with turnplates. But that comparison only tells part of the story once you factor in what the fleet operator was previously paying to outsource alignment work. Over a five-year window, the alignment-ready configuration’s higher upfront cost got offset by eliminating a recurring outside expense, plus the scheduling flexibility of doing that work whenever the fleet’s schedule allowed rather than an outside shop’s.

Maintenance costs between the two configurations end up fairly close, since the main hydraulic cylinders and seal maintenance schedule are identical either way — the turnplates add a small amount of upkeep, but nothing dramatic. For this fleet operator, the real cost driver wasn’t the lift configuration at all, it was how many trucks they were running across it weekly. A lower-volume fleet would likely have been better served by the standard configuration and an occasional outside alignment appointment instead of the added cost of turnplates.

Which Configuration Fits Your Fleet

If we’re being straight about it, the right choice comes down to volume and what you’re already paying to outsource. A fleet doing occasional alignment work, maybe a handful of trucks a month, is usually better off with the standard BendPak 4-post lift with jacks and sending alignment work out as needed — the turnplate investment doesn’t pay for itself fast enough to justify it. A fleet running daily delivery routes or heavy towing, where alignment drift is a constant issue, is the one that benefits most from bringing that capability in-house.

For the Sioux City fleet operator we worked with, the decision came down to simple math on how many trucks were rotating through their bay weekly and how much they’d been spending on outside alignment appointments. We’d encourage any fleet weighing the same decision to actually track that outside spend for a month or two before committing, because it makes the configuration choice a lot clearer than guessing. Either way, budgeting for seal maintenance and rebuild kits from day one keeps whichever configuration you choose running reliably for years.