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POWERLINE 31HD Series Alternators

J-180 mount alternators are designed and tested to withstand higher under-hood temperatures and are for vehicles requiring higher output at idle and at highway speeds. Tested for today’s heavy-duty on-road applications. This series is available in 160, 200, and 250-amp 12-volt, and 150-amp 24-volt models.



  • Freightliner FL67 and FL70. Navistar 3000 bus chassis and
    4000 truck chassis. Monoco Motorhomes. All Detroit, Cummins, Caterpillar, Mack, International and Mercedes diesel engines equipped for J-180 mount. For more application information call HDPSI at (800) 443-9394 or go to on the web for details.


  • Weight: 27 lbs.


  • 12-month limited warranty
  • Troubleshooting Guide and on-call technical support available
  • Application guide available by phone or online at


  • Mount types available: J-180 or pad mount (coming soon)
  • Amp/volt configurations: 160/12, 200/12, 250/12, 150/24
  • Heavy-duty, 50-amp press-fit diodes (six positive, six negative)
  • Specially-designed finned heatsink for cooler operation
  • Hand-wound, heavy-duty dual delta stator
  • Heavy-duty, extended-life bearings with heat-treated races,
    high-temperature grease, and Viton seals
  • Long life brushes and various pulleys to fit your application
  • Shipped with clockwise high-volume low-noise fan
    (bi-directional fan available)
  • 5/16” positive, 1/4” negative output terminals
  • External remote battery-sensing terminal
  • External relay/tachometer terminal
  • Ignition terminal for indicator or non-indicator applications


  • Extensive heat-chamber testing to withstand the higher under- hood temperatures of heavy-duty applications
  • Maximum amps at engine idle
  • Designed for worst-case, high-temperature operating conditions
  • Natural aluminum finish allows faster heat dissipation
  • Precision-engineered to guarantee the fit of each application
  • Heavy-duty materials provide exceptional performance
    for extended life.

POWERLINE 31HD Series Alternator Power Curve Performance

31HD Series, Various Amps and Volts
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POWERLINE 31HD Series Alternator Specifications

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POWERLINE 31HD Series Alternator Mount Specifications

31HD Series, Pad Mount
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31HD Series, J-180 Mount
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  HD Power Solutions Inc • 4616 Fairlane Ave • Fort Worth, TX 76119 • Phone: (817) 535-0284 • Fax: (817) 531-2755