Deck Crane · Deck Cranes
Heila HLRM 45-5S — Marine deck crane, articulating knuckle boom, medium-heavy lift.
| Load test / proof load | per class requirement, typically annual to 5-yearly depending on flag/class |
|---|---|
| Hydraulic oil sampling | 6-12 months |
| Hydraulic oil change | typically 2,000-4,000 running hours or per manufacturer's manual |
| Slew bearing greasing | weekly to monthly depending on duty cycle |
| Wire rope inspection (if fitted) | monthly, per class survey items |
| Hydraulic filter replacement | per manufacturer's manual, typically 500-1,000 hours or annually |
| Knuckle pin/bushing clearance | typically flagged once clearance exceeds roughly 0.5-1.0 mm above as-new - confirm against the maker's manual |
|---|---|
| Slew bearing axial/radial play | manufacturer-specific; any measurable increase against baseline should trigger closer monitoring |
| Wire rope discard (if fitted) | per ISO 4309 broken-wire and diameter-reduction criteria |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Deck cranes above the applicable SWL threshold are typically subject to Lifting Appliances survey requirements - annual thorough examination plus periodic proof load test, interval per class/flag. Survey focus is on hydraulic system integrity, overload protection function tests, and structural condition of high-stress welds at the pedestal and knuckle joint. Proof load and NDT records should be kept in the ship's lifting appliance register.
Estimated lifetime: Structural and mechanical service life for offshore knuckle boom cranes of this class is typically expressed by class/manufacturer's design basis in years (roughly 20-30 years) rather than running hours, given intermittent duty; hydraulic components are overhauled on a multi-year condition cycle - confirm against the specific class notation and manufacturer's design life documentation.
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