S4820
Seatrax Inc. S4820 — Offshore pedestal crane for bottom-supported structures; onboard and offboard/supply boat lifts.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Structural inspection of kingpost, boom chords, lattice members and gantry for cracks, corrosion, deformation and weld integrity per API 2C
Wire rope inspection: check all hoist cables (main, auxiliary, boom suspension) for broken wires, kinks, corrosion, reduction in diameter and proper reeving
Hydraulic system inspection: check hoses, fittings, cylinders, valves and HPU for leaks, pressure drop and fluid condition; verify relief valve settings
Slew ring and slew drive inspection: check bearing wear, backlash, lubrication and bolt torque on slew ring fasteners
Hoist brake inspection: inspect draw-works drum band brakes and hydraulic brakes for lining wear, adjustment and proper holding capacity under load test
Anti-two-block (ATB) system functional test: verify Seatrax mechanical ATB device activates correctly and disables hoist motion before two-block contact
Load chart and rated capacity indicator (RCI) / load moment indicator (LMI) calibration check: verify displayed loads against known test weights at multiple radii
Pedestal, base frame and deck attachment inspection: check for cracking, corrosion, loose or missing fasteners, and integrity of deck penetrations/welds
Type-general inspection and maintenance points for this equipment category — not model-specific.
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