Offshore Crane Mechanic — Job Description
Maintains, troubleshoots, and overhauls offshore pedestal cranes to ensure safe, compliant lifting operations across drilling and production assets.
I. Core Responsibilities
- I.1 Preventive maintenance: execute OEM- and standards-based PMs on hoist/slew/aux systems (lubrication, filter changes, oil sampling, cooler service, corrosion control).
- I.2 Mechanical overhauls: service winches, gearboxes, slewing bearings, brakes (disc/drum), sheaves, pins/bushes; measure backlash/clearance; perform precision torquing/tensioning.
- I.3 Hydraulic systems: diagnose/repair pumps, motors, cylinders, rotary joints, accumulators, relief/counterbalance/proportional valves; conduct pressure–flow testing and flushing.
- I.4 Wire rope care: inspect/lubricate ropes, measure diameter reduction and broken wires per acceptance criteria, manage spooling/fleet angle, replace terminations (socketing/wedge sockets).
- I.5 Safety devices and controls: maintain/calibrate LMI/RCI/AML, A2B, limit switches, encoders, load cells; perform PLC/HMI I/O checks and functional tests.
- I.6 Load testing & certification support: prepare cranes for proof-load tests (water bags/test weights), operate calibrated dynamometers/load cells, liaise with third-party inspectors/surveyors.
- I.7 Diagnostics & reliability: conduct vibration/thermal/ultrasonic checks, leak detection, contamination control, RCFA on failures; trend equipment KPIs in CMMS.
- I.8 Documentation & compliance: update work orders, logbooks, OEM checklists; manage PTW/LOTO, JSAs/TRAs; maintain lifting equipment registers and certification dossiers.
- I.9 Spares & tools: identify critical spares, create material reservations, verify part numbers/specs, maintain tool calibration status.
- I.10 Operations support: post-maintenance function tests with operators, weather-safe cranes before storms, support breakdown recovery, and contribute to lift planning for maintenance lifts.
- I.11 Handover: deliver detailed shift handovers and technical findings to the Crane Supervisor and Maintenance Planner.
Relevant Engineering Formulas (for diagnostics and repairs)
- I.F1 Hydraulics force: \( F = p \times A \)
- I.F2 Hydraulic power (approx.): \( P_{\text{hyd}} = \dfrac{p \times Q}{\eta} \)
- I.F3 Torque for bolting (approx.): \( T = K \times F \times d \)
- I.F4 Brake torque (disc): \( \tau = \mu \times F_n \times r \times n \)
- I.F5 Winch torque (simplified): \( T_w = \dfrac{H \times R_d}{n \times \eta_r} \)
II. Required Skills and Physical Demands
II.A Technical Skills
- II.1 Proficiency with pedestal crane assemblies: boom/pedestal structures, slewing rings, winches, gear trains, brakes, and wire rope systems.
- II.2 Hydraulics diagnostics: read schematics; test/adjust relief, sequence, counterbalance, proportional valves; closed-loop drives; contamination control.
- II.3 Controls/sensors: LMI/RCI calibration, limit/angle/A2B devices, basic PLC/HMI I/O checks, 24 VDC control circuits in hazardous areas (awareness).
- II.4 Precision maintenance: torque/tension, alignment, bearing fits, backlash/clearance measurement, flange management.
- II.5 Inspection/NDT (working level): MPI and UT thickness (preferred Level II), visual inspection to acceptance criteria for ropes, sheaves, hooks, and structures.
- II.6 Standards: working knowledge of offshore crane and lifting codes (e.g., API, EN, LOLER) and internal company procedures.
II.B Soft Skills
- II.7 Safety leadership in PTW/LOTO, JSA/TRA, and SIMOPS.
- II.8 Clear communication with operators/inspectors; precise shift handovers and technical reporting.
- II.9 Prioritization under schedule and weather constraints; teamwork in a multi-discipline environment.
II.C Certifications/Training
- II.10 Offshore survival and medical: BOSIET/FOET with CA-EBS; H2S; offshore medical (or equivalent).
- II.11 OEM crane maintenance certifications (model-specific) and LMI/RCI calibration training.
- II.12 Lifting competence: LEEA modules and/or recognized Competent Person training (jurisdictional), API/EN familiarity.
- II.13 Bolting/flange management (e.g., ECITB MJI) and hydraulics courses; NDT Level II preferred; hazardous area awareness (CompEx awareness beneficial).
II.D Physical Demands
- II.14 Work at height on booms/pedestals with harness; frequent climbing of ladders and vertical access systems.
- II.15 Lift/carry up to 15–25 kg; kneeling/crawling in confined areas; dexterity for fine adjustments.
- II.16 Exposure to wind, rain, salt spray, vibration, and 85–95 dBA noise; shift work and emergency call-outs.
III. Typical Tools, Software, and Equipment
- III.1 Mechanical: torque wrenches (up to 2,000 N·m), hydraulic torque/tensioners, dial indicators, micrometers, feeler gauges, pullers, alignment tools.
- III.2 Hydraulics: test gauges to 600 bar, flow meters, flushing rigs, portable test benches, nitrogen charging kits, hose fabrication tools (site-dependent), contamination monitors.
- III.3 Electrical/controls: multimeter, insulation tester, loop calibrator, portable LMI/RCI calibration kit, laptop with PLC/LMI configuration utilities.
- III.4 Condition monitoring: vibration analyzer, infrared camera, ultrasonic leak detector, oil sampling pumps and particle counters.
- III.5 Load test/NDT: calibrated load cells/dynamometers, water bags/test weights, MPI kits, UT thickness gauges, DPI kits.
- III.6 Rigging adjuncts for maintenance: chain hoists, come-alongs, temporary padeyes, man-riding winch (authorized use only).
- III.7 PPE and access: full body harness with SRL, fall arrest lanyards, MEWP/man-basket interfaces, FR/anti-static PPE.
- III.8 Software: CMMS (work orders/history/spares), digital torque logging, calibration management, OEM diagnostic suites, basic document management.
Toolchain Snapshot
| Category | Key Items |
|---|---|
| Hydraulic diagnostics | Test bench, gauges, flow meter, relief/valve setting tools, flushing unit |
| Mechanical precision | Hydraulic torque/tensioners, dial indicator, micrometer, alignment kit |
| Controls/LMI | PLC/LMI interface, calibration box, loop calibrator, sensor simulators |
| Condition monitoring | Vibration analyzer, IR camera, ultrasonic detector, oil particle counter |
| NDT/Load test | MPI/UT kits, dye penetrant, load cells, dynamometers, water bags |
| CMMS/records | Work order management, digital checklists, torque/calibration logs |
IV. Work Environment
- IV.1 Location: offshore fixed platforms, jack-ups, semisubs, drillships, FPSOs.
- IV.2 Rotations: typical 14/14, 21/21, or 28/28; 12-hour shifts; night shift coverage as required.
- IV.3 Travel/mobility: helicopter/boat transfers; mustering, baggage limits, rapid mobilization for breakdowns.
- IV.4 Conditions: exposure to marine environment, motion/heave, ATEX zones; strict dropped-object and working-at-height controls.
- IV.5 SIMOPS: coordination during drilling, lifting, and marine operations; weather windows govern critical tasks.
V. Reporting Lines and Cross-Functional Interfaces
- V.1 Reporting to: Crane Supervisor or Maintenance Supervisor; functionally aligned with Offshore Installation Management.
- V.2 Interfaces with: crane operators, lifting supervisors, rigging crew, mechanical/electrical/instrument technicians, marine/deck teams, maintenance planners, warehouse/logistics, HSE, third-party inspectors/surveyors, OEM field support (as authorized).
Deliverables & Interfaces
- V.D1 Deliverables: signed PM/CM work orders, inspection checklists, LMI/RCI calibration records, torque logs, oil analysis results, NDT reports, parts requisitions, RCFA reports, updated lifting certification registers.
- V.D2 Handoffs: to Crane Supervisor (status/limitations), Maintenance Planner (future work/spares), Lifting Supervisor (readiness for operations), HSE (findings/incidents), and third-party inspectors (evidence packs).
VI. Career Ladder and Progression
- VI.1 Next roles: Senior Offshore Crane Mechanic ? Crane Maintenance Lead ? Crane Supervisor/Lifting Equipment Supervisor ? Maintenance Superintendent or Onshore Technical Support.
- VI.2 What’s needed to move up: multi-OEM competency, formal inspection authority (e.g., LEEA/Competent Person), NDT Level II, advanced hydraulics/controls, RCA facilitation, CMMS/plan-build proficiency, proven leadership and safe delivery of critical overhauls.
- VI.3 Progression trigger (estimated): promotion after 8–12 hitches or 10–20 major overhauls, plus OEM Level-2 maintenance certification, LMI calibration course, and Competent Person sign-off by lifting authority.
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