S10832
Seatrax Inc. S10832 — Offshore pedestal crane (Series 108) for bottom-supported structures and MODUs; 200 ft and 170 ft boom configurations documented.
Inspector Detail
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Common issues
- Hoist and boom-hoist wire rope wear, corrosion or broken wires
- Slew bearing wear producing excessive backlash or play
- Hydraulic cylinder seal leakage on boom hoist/luffing cylinders
- Load moment indicator (LMI) sensor drift or calibration error
- Sheave groove and pin wear at the boom head
- Structural fatigue cracking at boom welds and pin connections
- Slew and hoist brake lining wear
Inspection checklist
- Visual structural inspection of boom, pedestal and jib for cracks or deformation
- NDT (MPI/dye penetrant) of load-bearing pins, boom foot and sheave pins
- Wire rope condition - broken wires, diameter reduction, lubrication
- Slew bearing bolt torque and backlash check
- Hydraulic system pressure test and cylinder seal inspection
- Load moment/limiter (LMI) function and calibration test
- Hoist and slew brake function test
- Anti-two-block and overload protection function test
- Sheave and pin lubrication check
- Proof/load test per class requirement
Service intervals
| Annual thorough examination (class/statutory) | 12 months |
| Proof load test | typically every 4-5 years - confirm against class and flag requirement |
| Wire rope inspection | monthly to quarterly, replace on discard criteria regardless of calendar interval |
| Hydraulic oil and filter change | per the maker's schedule, commonly 2000-4000 running hours or annually |
| Slew bearing and gearing lubrication | per the maker's schedule, commonly 250-500 hours or 3-6 months |
| LMI calibration check | annually or after any major repair |
Typical wear limits
| Hoist wire rope discard | typically discard per ISO 4309 guidance - more than about 10 randomly distributed broken wires in one lay, or roughly 7% diameter reduction - confirm against the class wire rope standard applied to this crane |
| Slew bearing backlash | trend against the maker's commissioning baseline; growing axial/radial play indicates raceway wear - confirm against Seatrax's maintenance manual limits |
| Sheave groove wear | consider renewal once groove wear reaches roughly 10% of rope diameter or shows sharp-edged wear - confirm against the maker's limits for this sheave size |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Hoist wire rope of the correct diameter and construction for the winch drum
- Boom hoist/luffing cylinder seal kits
- Sheave bushings and pins
- Brake linings/pads for hoist and slew brakes
- Slew bearing (long-lead item, order well ahead of need)
Safety
- Suspended load / dropped object hazard - never work under a raised boom without positive mechanical support
- Hydraulic accumulators hold stored pressure - isolate and bleed down before opening circuits
- LMI/overload protection must never be bypassed - it is the primary safeguard against structural overload
- Slew ring and boom pivot pinch points during operation
- High-pressure hydraulic fluid injection injury risk from pinhole leaks
Class survey
Falls under lifting appliance / Continuous Survey Machinery rules - class wants annual thorough examination records, NDT reports on critical pins and welds, current wire rope certificates, and the 4- or 5-yearly proof load test certificate; LMI calibration records should be retained and produced on request.
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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