MacGregor DC 10t/12m-C
MacGregor Deck Cranes. Electro-hydraulic deck cranes for ships with knuckle-jib option (optional). Drive via closed hydraulic system or electric (VFD). Lifting capacity 25-100 t (standard lines) to >500 t (heavy lift). Knuckle-boom construction with 360° rotation, stacking movements (hoisting/slewing/tilting). Typical application: container, multipurpose, bulk carrier vessels, cargo handling port/ship. MacGregor product lines: GL (multipurpose hydraulic), GLE (multipurpose electric), GLH (heavy lift hydraulic), GLHE (heavy lift electric), GLB (bulker hydraulic), GLBE (bulker electric), GLBS (bulker electro-hydraulic), PK/BPK (provision/boat cranes), HTC (telescopic knuckle boom).
Inspector Detail
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Common issues
- Hydraulic cylinder seal leakage on luff/hoist cylinders
- Hoist wire rope wear, corrosion or broken wires reducing residual strength
- Slew bearing wear/play causing excessive play or noise during slewing
- Overload protection / load moment limiter calibration drift
- Boom pin and bushing wear causing play in the boom linkage
- Hydraulic hose deterioration in way of the boom and pedestal
- Control valve block wear causing jerky or uncommanded movements
- Corrosion at the pedestal base and boom root welds
Inspection checklist
- Carry out the periodic thorough examination required for lifting appliances
- Inspect hoist wire rope for broken wires, corrosion and diameter reduction against discard criteria
- Pressure-test the hydraulic system and check for external leaks
- Function-test the overload protection and limit switches at reduced load before relying on them
- Check slew bearing bolts for correct torque and inspect for play
- Inspect boom pins/bushings for wear and correct lubrication
- Visually inspect structural welds at pedestal and boom root for cracking or corrosion
- Test all crane movements (hoist, luff, slew) through full range
- Test the hoist brake holds the rated load without drift
- Confirm the crane's test certificate and load chart are on board and current
Service intervals
| Annual thorough examination | 12 months |
| Dynamic load test (typically 1.1x SWL) per class/flag requirement | every 4-5 years - confirm exact interval with class/flag rules |
| Hydraulic oil sampling/change | per maker's PMS, commonly every 2,000-4,000 running hours or annually, whichever comes first |
| Wire rope detailed inspection | every 3-6 months per PMS, replace per discard criteria |
| Slew bearing and boom pin lubrication | per maker's schedule, often monthly |
Typical wear limits
| Hoist wire rope broken wires | discard criteria are set out in ISO 4309 (commonly cited threshold is around 6 randomly distributed broken wires in one lay) - confirm exact figures against ISO 4309 and the maker's manual for this crane |
| Wire rope diameter reduction | bauartüblich discard guidance is roughly 7-10% loss of nominal diameter - confirm against ISO 4309 rather than treating this as exact |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Hoist wire rope matching the original diameter and construction
- Hydraulic cylinder seal kits for luff/hoist cylinders
- Slew bearing (long lead time item - consider condition monitoring rather than holding as spare)
- Control valve spool/seal kits
- Hoist brake friction discs/linings
- Boom pins and bushings
Safety
- Suspended load / crush hazard during operation and testing
- Hydraulic high-pressure fluid injection injury risk when working on cylinders/hoses
- Wire rope failure under load - keep clear of the bight and load path
- Working aloft on the boom for inspection
- Risk of overload protection being defeated or bypassed - never operate with it disabled
Class survey
Deck cranes are surveyed as lifting appliances under class/flag rules - periodic thorough examination and dynamic load testing, with a test certificate and register of lifting appliances kept on board. Overload protection function is normally checked as part of the periodic survey.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Visual inspection for breaks, deformation, corrosion; DNV 5-year rule: sample and laboratory test; annual inspection of full length if damage indicators present → replacement if necessary
Rocking test (measure axial play); visual inspection: grease traces under bearing (dry = wear risk); take grease samples for ferrography analysis (wear particle monitoring: lamella particles = bearing damage)
Visual inspection for oil leaks at valves, cylinders, hoses; hydraulic oil samples for analysis (water content, wear metals); pressure test and control valve functional test; OnWatch Scout IoT condition monitoring optionally available
Surface cracks and deformation (visual inspection); tensile test to UNE-EN ISO 6892-1:2010; 'safety-related' components: high inspection level before commissioning and during service life
Alle 5 Jahre Lasttest erforderlich (DNV-Anforderung); Proof-Load-Test: max. 110% der Maximallast (OSHA/ASME B30.2.0-1967); Funktionsprüfung aller Positionen unter Wasser/Kalibriergewichten; DNV-Surveyor anwesend
Endschalter (Heben/Senken Grenzen); Überlaststoppfunktion; Druckregelventile (Druckprobe); Redundanz-Prüfung der Bremsen
Type-general inspection and maintenance points for this equipment category — not model-specific.
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