If you're looking for a reliable mid-rise tower crane that won't eat your budget, a used Potain MD 509-25T is hard to beat – provided you check load charts first and know the three situations where it's the wrong choice. I've been buying cranes for a 50-person contractor since 2020, and after evaluating ten different models for our last project, that's the conclusion I landed on.
The MD 509-25T lifts 25 tons at its maximum – well, at the shortest radius it handles 25 tons, but at full jib length (60m) that drops to around 9 tons. A lot of buyers fixate on the headline number and miss that detail. That's exactly the kind of mistake that cost me a project delay in 2022: I assumed the 25-ton rating applied everywhere, ordered one, and then had to rent a second crane for the far end. Not fun.
Why Potain, and Why Used?
People often think buying a used tower crane is risky because "you don't know what it's been through." That was true maybe 20 years ago, when documentation was spotty and many cranes were rebuilt without proper records. Today, a well-serviced Potain from an authorized dealer comes with a full service history, mobile crane inspection reports, and often a warranty. The real risk isn't the crane itself – it's buying from a broker who can't verify the provenance.
Another misconception: "Cheaper price means lower quality." Actually, it's the other way around – quality brands like Potain hold resale value because they're built to last. The initial price you pay for a used MD 509-25T reflects depreciation, not quality. A five-year-old crane that's been properly maintained is mechanically almost identical to a new one, but costs 40–50% less (based on dealer quotes I got in Q4 2024; always verify current pricing).
What to Look For When Shopping
I've processed about 30 crane purchases over the past three years, and I've learned to focus on four things:
- Service records – no log = no deal. I once passed on a 2018 MDT 809 because the seller couldn't prove the slewing ring had ever been inspected. Dodged a $12k repair bill.
- Load chart agreement – make sure the crane's specific configuration (jib length, counter-jib, hoist type) matches your project needs. The MD 509-25T is versatile, but it's not a one-size-fits-all.
- Local support – Potain has a strong dealer network (I work with two different dealers depending on region), but parts availability varies. Check lead times for common spares like brakes and electronics.
- Transport & erection costs – often overlooked. A bargain crane can suddenly cost as much as a pricier one once you add shipping, customs, and crane rental for assembly. I learned this the hard way in 2021: bought a crane from out of state for $18k less, only to spend $14k extra getting it to site.
Real Numbers: What You're Paying For
Just to give you a ballpark – based on prices I've seen from two major dealers and one auction in early 2025, a used Potain MD 509-25T (2018–2020 model, 50–60m jib, standard hoist) typically runs $180,000–$250,000 ex-works. A new unit would be $400k+ with a long lead time. The sweet spot is a 4–6 year old crane with 8,000–12,000 operating hours. Anything over 15,000 hours starts to need serious component overhauls, and I'd only consider it if the price is below $150k and you have a good local service shop.
When the MD 509-25T Is Not the Right Crane
Here's the honest part – and this is why I like the "conclusion first" approach. The MD 509-25T is fantastic for mid-rise (up to 20 floors) and heavy lifting at moderate radii. But:
- High-rise projects (>30 stories) – you'll need a luffing jib or an internal climbing system. The top-slewing design gets awkward and expensive above 120m.
- Extreme climates – if your site regularly sees -20°C or +45°C, you might need cold-weather packages or high-temperature lubrication options. Standard MD 509-25T units aren't optimized for that. Check the spec sheet.
- Ultra-tight budgets – if your total project crane budget is under $120k, you're better off renting for a single project. The maintenance and insurance costs of ownership will eat you alive. I've seen small firms bankrupted by buying a crane they barely used.
That said, for 80% of mid-rise commercial and residential jobs, this crane delivers. Just don't assume the 25-ton rating applies at every radius – get the load chart, check your pick weights, and I think you'll be happy.
Oh, and one more thing: every spreadsheet analysis I did said go with the cheaper Chinese model. Something felt off about their dealer support. Trusted my gut. Later learned that the import outfit had a history of slow parts delivery – exactly the kind of risk I couldn't afford. Sometimes your subconscious picks up signals your data doesn't.
Prices and data as of January 2025; verify current market conditions with your local Potain dealer.
