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Battery / Alternator Question

Discussion in 'Truck & Equipment Repair' started by wsmm, Jan 5, 2015.

  1. wsmm

    wsmm Member
    Messages: 80

    I'm using a 1990 Chevy 1/2 ton 4x4 to plow snow. It has a Meyers blade with a 47H electric / hydraulic unit. It has the standard alternator 105amp and standard battery, which is a 660 CCA rating I believe. When I'm lifting the blade I notice my volt meter takes a dive but comes right back up once I release the lift switch. Do I need to see if I can find a bigger alternator, battery or both? Do I nee to go to twin batteries?
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,749

    Yes to all the above. Adding bigger alt wire, bigger gnd wire. And gnd the alt as well.
  3. xgiovannix12

    xgiovannix12 PlowSite.com Addict
    Messages: 1,417

    I run an obs chevy I have upgraded alternator also a dual battery setup and I still get a voltage drop. Is it worth it yes I think it is...
  4. leolkfrm

    leolkfrm PlowSite.com Addict
    Messages: 1,339

    have a 90 with that setup, and put in a bigger battery, i'm in no hurry so the alt usually keeps up ok, i try to minimize other electric needs
  5. blazer2plower

    blazer2plower Senior Member
    Messages: 544

    5.7 in that truck? There's all kinds of bigger alternators that will fit. If you go bigger on the alternator. Must go bigger on the belt 1"