Offshore / Heavy Lift Crane · Deck Cranes
Huisman 400t Heavy Lift Crane — Deck Cranes, Family: Huisman Heavy Lift, offshore.
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| Wire rope visual inspection | typically every 1-3 months in offshore service, with a thorough examination at least annually per applicable class and manufacturer requirements |
|---|---|
| Hydraulic oil sampling and filter change | typically every 3-6 months |
| Slew bearing lubrication | per the manufacturer's schedule, commonly monthly |
| Hook and load block NDT | typically annual |
| Proof/load test | typically every 4-5 years, tied to class survey requirements |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Wire rope broken wire count | assess against the applicable rope discard criteria (e.g. ISO 4309 or the vessel's class rules) rather than a single generic number - discard criteria vary by rope construction and lay length |
|---|---|
| Slew bearing raceway/backlash wear | per the allowable backlash for this crane size - confirm against Huisman's own manual |
| Hoist brake lining thickness | renew before reaching the minimum lining thickness stated in the brake maintenance manual |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Offshore heavy lift cranes typically fall under Continuous Survey Machinery; class surveys commonly require wire rope certification, periodic NDT of load-bearing structural members and the hook/load block, load moment indicator calibration records, and a proof load test at the survey interval.
Estimated lifetime: Heavy offshore cranes of this SWL class are typically design-rated by load cycles and duty class rather than running hours; structural design life is commonly in the order of 20-25 years subject to ongoing inspection - confirm the specific design basis against Huisman's documentation for this crane.
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