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Nippon Pusnes

NS160HW

Mooring Winch · Anchor & Mooring Equipment

Technical data from manufacturer or class sources · not yet verified by a person

Nippon Pusnes Co., Ltd. NS160HW — Mooring winch with hydraulic motor.

Specifications

Technical data.reference — unverified

EngineHMC125/S3/125/40/FM3/CS/72/PL830
Drive systemHydraulic
Inspection

Inspector Detail

Common issues

  • Hydraulic motor leakage at the shaft seal
  • Brake band or brake disc wear reducing holding torque below rated capacity
  • Wire rope and drum wear from repeated mooring loads
  • Control valve sticking, causing jerky or delayed response
  • Low holding brake pressure/torque due to setting drift or worn linings
  • Gearbox oil contamination from water ingress through worn seals

Inspection checklist

  • Brake holding test at rated load
  • Hydraulic pressure check against the manufacturer's setting
  • Wire spooling and drum condition check
  • Gearbox oil sampling for water/contamination
  • Foundation bolt torque check
  • Emergency release/hand-release function test
  • Check hydraulic hoses and fittings for chafing or leakage

Service intervals

Gearbox oil changetypically 2,000-4,000 running hours or annually, whichever comes first - confirm against the maker's manual
Brake lining inspectionannually, or per company PMS
Grease pointsweekly to monthly depending on usage, per PMS
Hydraulic filter changeper manufacturer's schedule, commonly annually
Brake holding capacity testat each renewal survey and after any brake maintenance

Typical wear limits

Brake lining thicknessreplacement is typically triggered around 50% of new lining thickness for this class of winch brake - confirm the exact discard figure against the maker's manual
Wire rope discard criteriaper class/manufacturer guidance - broken wire counts over a given length and diameter reduction of roughly 7-10% from nominal are typical discard triggers, confirm against the applicable class rule and rope certificate

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

Critical spares

  • Hydraulic motor shaft seal kit
  • Brake lining/pads
  • Wire rope (correct diameter and construction for this winch)
  • Control valve
  • Coupling element

Safety

  • Mooring line snap-back zones - crew must stay clear of the bight during heaving/mooring operations
  • Hydraulic accumulator stored energy - depressurize and lock out before maintenance
  • Crush points at the drum, gearbox and brake mechanism
  • Brake failure risk under load if holding capacity has not been recently verified

Class survey

Mooring winches are surveyed with a brake holding capacity test at renewal survey, and wire condition/load test documentation is typically required to be available.

Estimated lifetime: Mooring winches are generally designed for the vessel's service life (commonly 20-25 years) with periodic overhaul of wear parts; gearbox/hydraulic motor overhaul intervals are often quoted in the range of 40,000-80,000 running hours by manufacturers - confirm against the specific maker's recommendation

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