I manage purchasing for a crane rental company—about $2.3M annually across spare parts, attachments, and the occasional new or used unit. Our fleet includes several Tadano models (a couple of older 70-tonners and a newer Mantis), and we're currently evaluating a used 80-ton all-terrain. The sales rep sends me the load chart, the boom length, the engine specs. Looks good on paper.
But I've learned the hard way that a spec sheet is just the starting point. Here's a 5-step checklist I've developed (after being burned twice) for evaluating a crane like the Tadano 80 ton GR-800EX beyond the published numbers.
Note: This is for procurement admins who report to both operations and finance. Ops wants capability; finance wants predictability. This checklist balances both.
Step 1: Verify the Load Chart Against Your Real-World Jobs (Not the Sellers)
It's tempting to trust the published tadano 80 ton crane load chart. But '80 tons' is a theoretical maximum at a very specific radius and configuration. In my experience, the question isn't 'Can it lift 80 tons?' but 'Can it lift 40 tons at a 25-foot radius with the outriggers fully extended on uneven ground?'
Pulling the actual load chart PDF (dated 2023 for the GR-800EX), I cross-reference it with our three most common job profiles: setting HVAC units on rooftops, placing steel for warehouse expansions, and unloading containers at distribution centers. The chart says 35,200 lbs at a 30-foot radius. That sounds fine—but our operators tell me they rarely get a perfect 360-degree swing radius on job sites. The chart assumes ideal conditions. Real-world work requires a margin.
Checklist item: Ask for the load chart for non-standard configurations (e.g., luffing jib, short boom). Most sellers only show the best-case scenario. If they hesitate, that's a red flag.
(I should have done this in 2022 when we bought a used crane. The specs looked perfect until the operator realized the boom angle limited our reach on the first job. Ugh.)
Step 2: Evaluate the Service History for the 'Unwritten' Problems
A crane's service record is like a patient's chart at the doctor's office—you want to see the chronic issues, not just the checkup dates. For a Tadano 80 ton crane, I'm looking for specific patterns:
- Carrier issues: Repairs to the steering system or suspension (common on higher-mileage units).
- Swing bearing wear: Look for parts replacement, not just grease reports.
- Engine repairs: Is it the original engine? Has it had major overhauls?
- Outrigger cylinder leaks: A $2,000 repair that often gets deferred by fleet operators trying to sell.
When I asked a dealer about these patterns on a 'certified' GR-800EX last quarter, they couldn't produce records for outrigger service beyond the standard inspection. The price started looking less attractive when I factored in a potential $4,000 repair within the first year.
Checklist item: Ask for the last 3 years of service invoices—not a summary sheet. The details are in the line items.
Step 3: Check for the 'Demag' Connection (But Don't Overpay for the Name)
Tadano's acquisition of Demag in 2019 brought high-end German engineering into the lineup. This is a legitimate advantage—the Tadano Mantis cranes, for example, benefit from Demag's crawler crane technology. But it's also a potential cost trap. Demag parts are notoriously expensive and can have longer lead times.
On the 80-ton GR-800EX, some components (like the hydraulic system or cab electronics may share Demag lineage? Maybe. Not sure. The service manual from 2021 references a mix of Tadano and Demag part numbers. When I need a new hydraulic pump, is it a $1,200 Tadano part or a $2,800 Demag part? (note to self: get a clear parts list before committing).
This isn't unique to Tadano—Kobelco and Liebherr have similar legacy complexities. But knowing this ahead helps with budgeting for the first year of ownership.
Checklist item: Get a list of 10 critical service parts (pump, cylinder seals, swing motor, electronics module) with current lead times and prices. If they can't provide this in 24 hours, the dealer's network is weak.
Example from last year: We needed a stabilizer control module for a 2020 Mantis. Dealer said 3 weeks. We were down for 5. The 'Demag connection' didn't help with speed—it just meant the part was more expensive.
Step 4: Assess 'Rush' Parts Availability (Because It Will Happen)
Here's where the time certainty premium kicks in. In March 2024, we paid $800 extra for next-day air for a boom cylinder seal for a Tadano 80 ton. The alternative was a 2-week wait. That 2-week wait meant a $15,000 contract we'd have to delay. The $800 was a bargain.
But not all dealers can guarantee rush delivery. Some offer 'expedited' for a 30% markup but can't actually commit to a timeline. When I call the parts desk for a GR-800EX, I ask: 'If I need part #100-1231 by Friday, can you guarantee it?' If they say 'we'll try' instead of 'yes for $X premium,' I'm wary.
Checklist item: Ask the dealer for their 'Emergency Parts Guarantee Policy' in writing. If they don't have one, ask them to commit to a 48-hour cap on a specific part (like a hydraulic pump).
Step 5: Don't Forget the 'Truck Nuts' Factor (and Other Unexpected Costs)
This is a bit tongue-in-cheek, but the point is serious. A crane is a complex machine. Little things—like the condition of the anti-two-block system, the wiring for the rotating beacon, or even the state of the aftermarket modifications a previous owner made—can eat into your budget. I call it the 'truck nuts' factor: the decorative, non-critical stuff that ends up costing money to fix because it wasn't included in the inspection.
On a used Tadano 80 ton, check:
- Wiring harness repairs: Aftermarket splices can lead to intermittent electrical faults.
- Cab interior: Is the seat torn? Are the gauges all functional? It's not a dealbreaker, but it signals how well the crane was maintained.
- Logos and stickers: A faded 'Tadano' decal doesn't affect performance, but if the previous owner removed all branding (common for rental fleets), you'll need to replace it for warranty or rental purposes.
Checklist item: Do a walk-around photo audit before purchase. Ask the dealer to note any non-functional items. They'll respect the thoroughness (and maybe drop the price by $500 if they know you'll find it later anyway).
Common Mistakes (From Experience)
Mistake #1: Trusting a single load chart. Always get multiple configurations from the factory. A crane that works perfectly for one job may be less efficient for another.
Mistake #2: Ignoring the parts network. A cheaper crane from a brand with no local dealer support is risky. Tadano's dealer network is solid, but verify that your region has a depot with a comprehensive stock of common parts (like seals and filters).
Mistake #3: Forgetting to check 'what is happening with crane company stock today?' I'm serious. The stability of the manufacturer matters. If Tadano's stock (TSE: 6395) is tanking due to supply chain issues, their parts availability could suffer. I check quarterly reports before any major purchase. As of Q3 2024, Tadano's financials were stable, but it's worth monitoring.
Mistake #4: Assuming the 'bob crane' (boom truck) model substitutes for a proper all-terrain. They serve different needs. A used 80-ton all-terrain like the GR-800EX is for heavy picks and tricky access; a boom truck is for faster, lighter jobs. Don't confuse the two when comparing specifications.
Ultimately, the Tadano GR-800EX is a strong machine. Its load chart is competitive for its class. The Demag engineering provides genuine benefits in control and precision. But the real value isn't in the brochure—it's in how well the dealer supports the purchase and how well the crane fits your actual job mix.
The best deal isn't the cheapest crane; it's the one where the total cost of ownership (parts, downtime, rush shipping) is predictable. And that, I've found, is worth paying a premium for.
