Offshore Crane · Deck Cranes
Liebherr Maritime Deck Cranes. Liebherr Maritime produziert spezialisierte Schiffs- und Offshore-Kräne für Hafenumschlag, Schiff-zu-Schiff-Operationen und Offshore-Anwendungen (Oil & Gas, Windenergie). Die Produktpalette umfasst schwimmende Schiffe (CBG), Zylinderluffing-Schiffskräne (CBW, LS-C), Ram-Luffing Offshore-Kräne (RL/RL-K), Mast-Type Kräne (MTC) und Board-Offshore-Krän
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| Hydraulic oil sample analysis | every 2000-3000 running hours or annually |
|---|---|
| Hydraulic filter replacement | per the manufacturer's schedule, typically every 500-1000 hours or on differential pressure indication |
| Wire rope thorough inspection | every 3-6 months, with weekly visual checks |
| Slew bearing bolt torque check | annually |
| Proof load / load test | per class survey cycle, commonly every 4-5 years |
| Grease points (slew bearing, pins, sheaves) | weekly to monthly depending on duty cycle |
| Wire rope discard criteria | per ISO 4309 broken-wire/diameter-reduction table for this rope construction - confirm against class table, not a fixed figure |
|---|---|
| Slew bearing raceway wear/backlash | manufacturer tolerance typically a few tenths of a millimetre - confirm against the manufacturer's manual |
| Sheave groove wear | flagged when the wire seats level with or below the sheave flange - confirm against the manufacturer's or class criteria |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Deck/offshore cranes are normally carried on the ship's register of lifting appliances under class rules: annual thorough examination, proof load test typically every 4-5 years, and periodic NDE of load-bearing pins and welds at intervals set by class. Test certificates and load test records must be kept on board and available to the surveyor.
Estimated lifetime: Offshore deck cranes of this capacity are generally rated by structural design life (commonly 20-25 years with periodic recertification) rather than running hours; hydraulic and wear components (seals, hoses, wire rope) are replaced on condition rather than a fixed hour count.
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