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Anchor handling / towing winches

Anchor Windlass · Anchor & Mooring Equipment

Class-certified type (DNV register) · technical data sheet not yet verified​​⁠‍‍⁠​​‌‍​‌⁠‍‍‍​​‌‌

MacGregor anchor handling/towing winches are designed for specific customer requirements and offer the best possible solution for a specified scope of work.

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Download datasheet (PDF) (3690 KB)
Inspection

Inspector Detail

Common issues

  • Brake band/lining wear from repeated braking under load
  • Hydraulic motor/pump wear reducing haul-in speed or available torque
  • Wire rope spooling gear wear causing uneven layering on the drum
  • Clutch wear (dog clutch or friction clutch, depending on the specific design)
  • Load cell/tension monitoring drift
  • Hydraulic seal leakage at swivel/rotary unions
  • Corrosion of the drum, brake components and structural frame from salt exposure

Inspection checklist

  • Inspect brake linings for wear and even contact
  • Test brake holding capacity function before towing/anchor handling operations, per maker/class procedure
  • Check wire rope for wear, broken strands, corrosion and correct spooling
  • Inspect the hydraulic system for leaks and check operating pressures against the maker's specification
  • Verify load cell/tension readout calibration
  • Check gearbox oil condition and level
  • Inspect clutch engagement and wear
  • Check drum and fairlead alignment
  • Test the emergency release/quick-release function
  • Inspect foundation bolts and structural mounting for cracking or corrosion

Service intervals

Wire rope inspectionbefore each operation and per class wire rope discard criteria
Brake holding capacity testtypically annual, per class/flag requirement for towing/anchor handling winches
Gearbox oil sampling/changetypically every 2,000-3,000 hours or annually
Hydraulic oil samplingtypically every 2,000-3,000 hours or annually
Load cell calibration checktypically annual

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Typical wear limits

Wire rope diameter reductiongeneral marine practice is discard at roughly 7% diameter reduction from nominal, or per class wire rope inspection code - confirm against the maker/class rules
Brake lining wearcondition-based - renew before the maker's minimum lining thickness is reached; no universal figure applies - confirm against MacGregor's manual

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

  • Brake lining/band set
  • Hydraulic motor/pump seal kit
  • Spare wire rope length matched to the drum
  • Clutch friction plates or dog clutch components
  • Load cell/tension sensor unit
  • Gearbox seal kit

Safety

  • Anchor handling/towing winches are high-energy equipment - a wire rope or brake failure under load is a life-safety hazard; keep personnel clear of the bight and snap-back zones
  • Verify brake holding capacity before any towing operation and never exceed the rated line pull/SWL
  • Hydraulic system stored pressure - isolate before maintenance
  • Crush/entanglement hazard at the drum, fairleads and sheaves
  • The emergency quick-release system must be tested and understood by the crew before operation

Class survey

Anchor handling and towing winches on class-notated towing/anchor handling operations typically require an annual brake holding capacity test and wire rope certification/inspection records. Class will also want documentation of a load test after any major repair to the brake or drum assembly.

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