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Plow Motor Amperage draw

Discussion in 'Truck & Equipment Repair' started by 2004blkcorvette, Dec 19, 2010.

  1. 2004blkcorvette

    2004blkcorvette Junior Member
    Messages: 5

    I own a Fisher Inst-Act with the standard 21500k-1 two terminal pump motor. My question is what should the amperage draw be for normal operation when lifting the blade? I can't seem to find this data in any Fisher or Western motor literature or anywhere on the web for that matter. The motor is 1.04 KW operating at 12 V dc, so nominal amps should be 86.67 with no load, but what should it be in operation? Any help is apreciated.
  2. deicepro

    deicepro PlowSite.com Addict
    Messages: 1,124

    dont quote me, but I thought that plow pumps were somewhere in the 300 amp range....why else would your alt guage go down to 9v when lifting, my electric spreader takes 70 amps and does nothing to my alt guage
  3. damian

    damian Senior Member
    Messages: 330

    i know a blizzard plow takes55-65 amps to angle and 150-165 to lift
  4. cubicinches

    cubicinches PlowSite.com Addict
    Messages: 1,415

    Fisher/Western states 200 amps as max draw with the pump against the pressure relief (all the way raised with the control still activated). I usually see 170-190 on systems that are operating fine. I've seen 200 and slightly over without any issue as well. Much over 200, and I think the motor is getting tired.
  5. 2004blkcorvette

    2004blkcorvette Junior Member
    Messages: 5

    Thanks guys. I just read mine and it's drawing 157 - 165 amps so I guess it's good!