BOS 45000
Liebherr Maritime Cranes BOS 45000 — Ultra-heavy board offshore crane for heavy lift crane vessels; offshore wind, oil and gas installation.
Inspector Detail
▸
Common issues
- Wire rope wear, corrosion or broken wires exceeding discard criteria from heavy-lift duty cycles
- Slew bearing wear/backlash from sustained heavy overturning moments
- Hydraulic system contamination or seal wear in the luffing/hoisting cylinders and winches
- Load moment/limiting system calibration drift, affecting overload protection accuracy
- Structural fatigue cracking at high-stress boom connection points from repeated heavy lifts
- Sheave and pulley wear from sustained wire rope loading
- Anti-two-block and other safety device sensor faults
Inspection checklist
- Visual and NDT inspection of the boom structure at high-stress points per the class/maker schedule
- Wire rope inspection (broken wires, diameter reduction, corrosion) against the applicable discard criteria
- Function-test the load moment indicator/limiter against known test loads
- Check slew bearing bolt torque and backlash
- Pressure-test the hydraulic system and inspect cylinders/hoses for leaks or damage
- Function-test anti-two-block, overload and emergency stop devices
- Inspect sheaves and drums for wear or grooving
- Verify the current load test/proof load certification
Service intervals
| Wire rope inspection | before major lifts and at defined periodic intervals per class requirement |
| Full load test | per class/flag requirement, typically every 4-5 years or per the crane's own certificate validity |
| Hydraulic oil sampling/analysis | every 500-1,000 hours or per the maker's schedule |
| NDT of critical structural welds | per class survey interval, typically annually to every few years depending on class notation |
| Load moment indicator calibration check | annually or per class requirement |
Critical spares
- Wire ropes, hoist and luffing - correct diameter/construction only, no substitution without engineering approval
- Hydraulic cylinder seal kits
- Sheave/pulley bearings
- Slew bearing seals
- Load cell/load pin sensors for the load moment system
- Hydraulic filter elements
Safety
- Catastrophic failure risk from exceeding rated capacity - the load moment limiter must never be overridden or defeated
- High-pressure hydraulic system stored energy - depressurise and lock out before intrusive work
- Suspended-load hazards during heavy-lift operations - exclusion zones must be enforced
- Wire rope failure risk if discard criteria are exceeded - do not delay replacement
Class survey
Offshore heavy-lift cranes of this capacity are surveyed under the classification society's lifting appliance rules, with periodic load testing, NDT of structural welds, wire rope certification and load moment system function testing all required at survey - the documentation trail is what class actually checks.
Components & Design
Component data being added…
Technical Data
🤖 Ask about this model
One free question — answered like a marine engineer. No account needed.
Common failures & inspection points
Structural integrity check of boom, jib, and lattice sections including weld seams and pin connections
Wire rope inspection: wear, broken wires, corrosion, kinks, and correct reeving on all hoists and luffing systems
Slewing bearing and ring gear: lubrication, wear, backlash measurement, and corrosion protection
Hydraulic system: fluid level, filter condition, hose and seal integrity, pressure settings, and leak-free operation
Brake systems (hoist, slew, luffing): function test, pad/disc wear, and holding capacity under rated load
Electrical and control systems: Litronic control panel function, limit switches, overload protection, emergency stop, and anti-collision devices
Pedestal, king post, and deck attachment: fastening bolts torque check, base welds, corrosion treatment, and alignment
Lubrication of all moving parts: sheaves, blocks, pins, bearings, and gear drives per OEM lubrication schedule
Type-general inspection and maintenance points for this equipment category — not model-specific.
Suppliers & Spare Parts
Direct links to manufacturer, datasheet, spare-parts portal and dealers — request access below.
📄 Request sourcing links & documentsCases, daily reports, timesheets and AI troubleshooting in the OceanSphere Marine app — free for 14 days.
Start free trial →Find manufacturers, repair shops and spare-part dealers in the Maritime Network — our global company directory.
Maritime Network →