---
title: "Should You Buy a Used Overhead Crane? A 15-Point Check"
url: https://yzcranes.com/should-you-buy-a-used-overhead-crane-a-15-point-check/
date: 2026-09-14
modified: 2026-09-12
lang: en
author: "liudatou"
description: "Yes, but only when the file is complete, the crane has passed a 1.25-times static load test, and its duty class matches the actual duty cycle. Prices typically run 40%–70%..."
categories:
  - "Uncategorized"
image: https://yzcranes.com/wp-content/uploads/2026/07/image-2-1024x768.png
word_count: 1953
---

# Should You Buy a Used Overhead Crane? A 15-Point Check

Yes, but only when the file is complete, the crane has passed a 1.25-times static load test, and its duty class matches the actual duty cycle. Prices typically run 40%–70% of a new machine, so the saving belongs to the equipment line and never to the inspection line. Any of the 15 points that shows permanent girder deformation, brake failure, or no traceable paperwork is a walk-away. Walk away fast.

The most common tragedy in the used-equipment market pays the "savings" back twice over in modification work and downtime. This guide offers a 15-point checklist you can print and carry to the yard. Each item includes pass lines and veto conditions. Then judge each one.

## How to Save Money the Right Way on a Used Crane

### The fair price band

A same-spec used overhead crane usually closes at 40%–70% of new price. Price follows condition. Machines under three years old, with complete files and light duty history, sit near the top. Machines over ten years old with unclear origins sit near the bottom or lower. When a quote dives below 40%, hold the excitement and ask one question. Why would the seller let it go that cheap? That question matters.

### The three machine types worth buying first

The first type is a relocation machine: a company moves wholesale or demolishes a hall, and well-kept equipment must leave at honest prices. Those prices then tend to reflect real condition. The second is a project-surplus machine: a backup unit left after a big project with very low running hours. The third is a low-duty machine decommissioned by a major plant, such as an A3–A4 class crane from a repair shop or spares store. Its years can be long, but total cycles stay few, and big plants keep disciplined check records.

One used-car analogy fits: review the service book first, then put the car on a lift and inspect the frame. A used crane works the same way — file first, girder measurement second. The model year does not decide condition; duty and maintenance do. Both leave traces.

### The price of saving in the wrong place

Inspection fees, third-party load testing, dismantling and transport, and rail adaptation together usually total 10%–20% of equipment price. Cutting all four means betting on luck, and a crane is special equipment tied to personal safety, so this bet pays terrible odds. Never skip inspection.

Seen the other way, that same 10%–20% is the buyer's strongest bargaining chip. Every defect found in inspection supports a price cut or a demand that the seller fix it first. Negotiating with a report in hand beats negotiating on "looks fine," and the final price gap often exceeds the inspection fee itself. Professional buyers sign a letter of intent that makes the deal conditional on passing inspection. Testing then precedes the transaction instead of following it. Test before paying.

## Five Structural Checks: Veto Items

Structural members leave no room for a "make-do repair," and any failed item among these five should end the deal.

**1. Girder camber and measured deflection.** Take three-point elevation readings on the unloaded girder. Then measure elastic deflection under rated load, and judge against GB/T 3811. A1–A3 classes allow no more than 1/700 of span, A4–A6 no more than 1/800, and A7–A8 no more than 1/1000, with residual deformation after unloading approaching zero. Permanent sag is an instant veto.

**2. Cracks in web and flange welds.** Run visual plus magnetic-particle or penetrant inspection along the four main girder welds. Cover the web stiffener welds and end-truck joint welds too. Any through-crack vetoes the machine, and old weld-repair scars demand a history explanation.

**3. End trucks and corner bearing boxes.** Check end-truck bolt torque, corner-box welds, and mating surfaces. The end truck is the throat of load transfer, and weld-repair marks often point to rail-gnawing or a collision history.

**4. Web waviness and corrosion thinning.** Measure local web waveness with a straightedge and sample wall thickness in corroded zones with an ultrasonic gauge. Decommissioned coastal machines need a close look at lower-flange ponding zones, and thinning past design allowance vetoes.

**5. Rails and wheel treads.** Survey runway rail straightness and clip condition. Then check wheel treads and flanges for wear, spalling, and polished rail-gnawing bands. Knife-sharp flanges or uneven wear show a long-running crooked travel path, with end-truck or foundation distortion hiding behind it.

One plant lost money on exactly this. A nameless used crane came in on price alone, and only after installation did wheel loads exceed the corbels' design capacity. Corbel reinforcement, rail replacement, and foundation rebuild together cost more than the crane, and two months of schedule vanished.

## Five Mechanism Checks

**6. Hook.** Inspect per ASME B30.10. Throat opening stretched beyond 15% of original, dangerous-section wear beyond 10% of original, or any crack or twist forces scrap and replacement. Welding repair is not allowed. Never weld a hook.

**7. Wire rope.** Follow ISO 4309 and GB/T 5972, checking broken-wire counts per lay, diameter wear, corrosion, and bird-caging. Rope at discard criteria needs full replacement. Re-roping cost must enter the budget. Budget it first. Check sheave-groove wear and drum spooling at the same time.

**8. Brakes.** Check shoe or pad thickness, spring tension, and actual braking torque, then run a rated-load drift test. Hoist-brake failure is a veto item, and hydraulic thrusters need an oil-level and leak check as well.

**9. Reducer.** Listen for abnormal noise at no load and in staged loading. Inspect joint faces and shaft seals for oil leaks, and draw a small oil sample to look for metal particles. Tooth pitting or broken teeth basically means a full overhaul, so even a low price needs a fresh calculation. On an electric hoist the reducer integrates with the drum, which raises repair cost.

**10. Wheel bearings and rail-gnawing traces.** Bar the wheels by hand to feel for bearing drag and noise. Then combine the result with the flange traces from item 5 to judge long-term crooked running. Bearings can swap out, but end-truck internal stress built by years of crooked travel cannot be undone.

## Five Electrical and Safety Checks

**11. Motor insulation.** Measure cold-state insulation resistance with a 500V megohmmeter; the pass line is ≥0.5 MΩ. A low reading should first get a drying and dust-cleaning cycle, then a retest. Persistently low readings signal aged or moisture-damaged windings. Rewind or motor replacement costs then enter the budget. At the same time, check that nameplate voltage and frequency match the destination supply. Both values must match. Imported used cranes carry a particular 50Hz/60Hz mismatch risk.

**12. Control panel.** Assess contactor main-contact erosion plus relay and terminal aging. If a VFD exists, record brand, year, and fault-code history, since discontinued old drives are a spare-parts trap. Evaluate cables one by one for hardened insulation and surface cracking, and price a full rewire before committing. That quote prevents a surprise after purchase. Get that quote first.

**13. Safety devices.** Function-test each item: hoist upper limit, lower limit, travel limits, buffers, emergency stop, the overload limiter or load cell, and the audible-visual alarm. Missing or failed devices come up to new-machine standards, and this money cannot be cut.

**14. Documents and files.** Collect five items where possible: factory certificate, general and electrical drawings, periodic inspection reports across the years, repair and modification records, and accident records. Missing files mean duty class and load history cannot be traced, because inspection shows only current condition, not accumulated fatigue. A machine with no nameplate and no file deserves a straight pass. Pass on it immediately.

**15. Load test.** Per GB/T 5905, run the static test at 1.25 times rated load and inspect residual deformation, welds, and brakes. Then run the dynamic test at 1.1 times rated load while watching every mechanism, brake drift, and limit action. A qualified inspection body or third-party professional should conduct the tests and issue the report.

### The 15-point field table

| # | Check item | Pass criteria highlights | Method | Verdict |
| --- | ---------- | ------------------------ | ------ | ------- |
| 1 | Girder camber/deflection | Meets GB/T 3811 class limits; no residual deformation | Level/total station | Permanent deformation → veto |
| 2 | Girder welds | Crack-free | Visual + MT/PT | Crack → veto |
| 3 | End trucks, bearing boxes | Crack-free, secure joints | Visual + torque check | Crack → veto |
| 4 | Web, corrosion | Waviness passes, thickness in spec | Straightedge + UT gauge | Excess thinning → veto |
| 5 | Rails, wheels | No severe wear or rail gnawing | Visual + gauges | Rectifiable |
| 6 | Hook | Opening growth <15%, wear <10% | Gauges, ASME B30.10 | Over-limit → scrap and replace |
| 7 | Wire rope | Broken-wire/wear below discard line | ISO 4309/GB/T 5972 | Over-limit → replace rope |
| 8 | Brakes | Torque adequate, drift passes | Load braking test | Failure → veto |
| 9 | Reducer | No abnormal noise or severe leaks | Listen + oil sample | Rectify as needed |
| 10 | Wheel bearings | No drag or noise | Barring check | Replaceable |
| 11 | Motor insulation | Cold state ≥0.5 MΩ | 500V megohmmeter | Persistent low → replace/repair |
| 12 | Control panel | Components sound, VFD traceable | Powered check | Rectifiable |
| 13 | Safety devices | Limits/buffers/E-stop/overload all effective | Function test | Missing items mandatory |
| 14 | Files | Certificate, drawings, inspection records present | Document review | No file → veto |
| 15 | Load test | Static 1.25x and dynamic 1.1x pass | Per GB/T 5905 | Fail → veto |

## Recommended Deal Process

Keep the sequence straight. Review the file first, then walk the machine, then commission a qualified inspector or third party for full testing and load tests, and only then negotiate price and sign. Used cranes for export or foreign-invested projects also need their original design standards checked — GB/T 3811, CMAA 70, ASME B30.2 — along with OSHA 1910.179 periodic-inspection duties across service life. Mismatched standard systems mean trouble in both later inspection and spare parts. Then write three things in the contract. State the seller's promised build year, duty class, and accident history in black and white; set the exit conditions if inspection or load testing fails; and split dismantling, transport, and reinstallation duties.

### Two land-phase bills that get forgotten

First come dismantling, transport, and rail adaptation. Gauge, wheel loads, and rail type such as QU70 or A55 must match site conditions, and sometimes the rail travels with the deal. Second comes spare-part availability. Check whether motors, brakes, and electrical components still sit in production, because an obscure brand or discontinued model can turn any price into a one-time machine. Spare parts decide value.

### Re-acceptance after relocation

A full re-acceptance follows reset on the new floor. Dismantling can change geometric accuracy, and transport vibration can loosen bolts. Camber, gauge, and diagonal differences all need fresh measurement, and the factory report never serves as proof of post-installation condition. Budget time for the full chain of dismantling, transport, repair, installation, and re-inspection. Industry experience schedules 6–10 weeks for the cycle, and rushing it plants the most defects at the reset stage. Never rush reset work.

One closing question: the seller swears the machine "ran fine until yesterday," but can he produce the latest periodic inspection report? "No problems" carries zero inspection value on its own; the numbers on the report do. Those numbers decide.

## Why Yuzhong

Founded in Changyuan, Henan, in 1978, Yuzhong runs 48 years of history, ISO 9001/14001/45001 systems, parallel FEM, ASME, and CE frameworks, and exports to more than 120 countries. New-machine quotes carry transparent line-by-line configuration and serve as the benchmark for pressing down and comparing used-equipment prices.

Standard overhead crane, gantry crane, and electric hoist lines share universal parts and long supply cycles, so later maintenance never turns passive. Yuzhong also provides used-machine evaluation, modification, and relocation plans. Girders design to true GB/T 3811 duty classes, Q355-series steel grades follow the environment, and factory camber readings plus load-test records stay archived. SGS and BV third-party witnessed acceptance stays available, so every choice — buying new or evaluating old — rests on documents. Documents win arguments.