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Huisman Equipment (Netherlands)

AH/Towing Winch

Anchor Handling Winch · Anchor & Mooring Equipment

Technical data from manufacturer or class sources · not yet verified by a person​​‍‌​⁠⁠‍​‌​​​⁠‌‌‍‌⁠‍
Pull 500-5,000 kNCapacity
Anchor Chain / WireMedium

Huisman Equipment ist ein niederländischer Premium-Hersteller aus Schiedam, bekannt für die größten und leistungsfähigsten AH-Winden im Offshore-Markt. Auf den weltweit größten AHTS-Schiffen (>300 t Bollard Pull) und Deepwater-Ankerschiffen installiert. Huisman fertigt auch die schwersten Offshore-Krane.

Specifications

Technical data.

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TypeAnchor Handling Towing Winch (Ultra Heavy Duty)
Drive TypeHydraulic
ConstructionUltra-heavy-duty steel, special drum designs
Service

Service notes.

What our service work and the manufacturer documentation say about keeping this model running.

Specialized maintenance per Huisman manual. Annual load test mandatory.

Inspection

Common failures & inspection points

Inspection

Inspector Detail

Common issues

  • Wire rope spooling irregularities (loose turns, cross-winding) from misaligned spooling gear or an under-tensioned first layer
  • Band or disc brake lining wear beyond the holding-capacity margin, most often found only under a proper brake test
  • Hydraulic motor or swivel seal leakage under sustained high-tension pulling
  • Load pin/tension meter drift or failure, giving unreliable line tension readouts to the bridge/winch control
  • Gearbox oil contamination from seawater ingress through breather or seal wear
  • Fairlead and sheave wear grooves from years of wire rope contact under heavy load
  • Emergency quick-release mechanism sticking from lack of routine exercise

Inspection checklist

  • Carry out a static brake holding test at the class-required percentage of rated line pull/brake holding load
  • Inspect the full length of wire rope for broken wires, corrosion, kinks and diameter reduction
  • Check hydraulic system working and relief pressures against the maker's setting sheet
  • Function-test the emergency quick-release/render-recover system
  • Check spooling gear alignment and drum flange condition for wire crushing or riding turns
  • Calibrate or verify the load/tension monitoring system against a known reference
  • Inspect gearbox oil condition (water/particulate contamination) and oil level
  • Check foundation bolts and deck seating for movement, cracking or corrosion

Service intervals

Hydraulic oil and filter changetypically annually or per running-hour interval in the maker's manual
Gearbox oil changetypically annually, sooner if contamination is found
Brake lining inspectionat every brake test, minimum annually per class requirements for towing/AH winches
Wire rope lubricationregularly per the rope maker's recommendation, typically every 1-3 months depending on usage
Full load/brake testannually, plus a proof/renewal test at special survey intervals set by class
Wire rope renewalcondition-based, per class discard criteria - not a fixed calendar interval

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 reductiondiscard once reduction reaches the class/rope-maker's limit, commonly around 7-10% of nominal diameter - confirm against the applicable rope certificate and class rule
Brake lining thicknessrenew before reaching the maker's minimum thickness mark - do not run to visible glazing/thinning
Drum flange/sheave groove wearrenew or re-machine once wire seating is visibly distorted or wire damage from the groove is found

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

Critical spares

  • Brake lining/pad sets
  • Hydraulic motor and swivel seal kits
  • Wire rope (correct diameter, construction and length for the winch)
  • Gearbox bearings
  • Load pin/tension sensor
  • Spooling gear chain or drive components

Safety

  • Snap-back hazard from a wire rope under high tension - keep all personnel out of the bight and line-of-fire zones during anchor handling
  • Stored energy in hydraulic accumulators - depressurise and lock out before opening any hydraulic component
  • Crush points at the drum, fairlead and spooling gear during operation
  • Emergency quick-release must be tested and understood by the crew before it is needed in a real overload event
  • High-pressure hydraulic lines - a pinhole leak can inject fluid through skin; never search for leaks by hand

Class survey

Anchor handling/towing winches on AH-notation vessels require an annual brake and function test, and a periodic (commonly 5-yearly) load test to a proportion of rated line pull as set by the class society. Wire rope certificates, brake test records and quick-release function tests are the documentation class will ask to see.

Estimated lifetime: Not meaningfully expressed in running hours; the winch structure and gearbox are typically designed for 20+ years of service with scheduled overhauls, while wire rope, brake linings and seals are condition-based consumables

Spares

Replacement Parts

Spare parts notes

Huisman (Schiedam, Netherlands). Specialized — lead time: 6-12 weeks.

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