plow seems to be drawing much power...

Discussion in 'Mechanic and Repair' started by General Grounds, Jan 18, 2005.

  1. General Grounds

    General Grounds LawnSite Senior Member
    Messages: 902

    :blob3: it seems that when to plow is attached im drawing alot of power. if the lights are on there is a consideralbe dim when angling or lifting the plow, i even hear the fan change speeds. im thinkin eithere the alt. is on the outs or the pump or motor are going bad. all connections are cleaned and ludbed, so anything else i may be missing???? thanks tony
  2. Grassmechanic

    Grassmechanic LawnSite Silver Member
    Messages: 2,697

    Plows do draw a lot of power. Without knowing the details of your vehicle, it sounds as if you are using an 85 amp alternator. The minimunm I would use is a 120 amp. Also, a weak battery could cause lights to dim when plowing.
  3. AL Inc

    AL Inc LawnSite Bronze Member
    Messages: 1,209

    Tony, my 02 2500HD has the plow prep package and it still does that when raising or angling the plow. I've plowed 12-15 hours straight with this truck and never a problem. I take it your truck only just started doing this? Like grassmecanic said, check battery and alternator.
  4. grass_cuttin_fool

    grass_cuttin_fool LawnSite Gold Member
    Messages: 3,526

    Even with 2 batteries and a heavy alternator, the lights are going to dim and the fan is going to change sounds, it is a very heavy draw/drain on the electrical sytem when the electric pump is working
  5. DLCS

    DLCS LawnSite Platinum Member
    Messages: 4,386

    I've never seen a truck that the headlights didn't dim a little when the plow is operated. If it s getting worse first thing that i would check is the connections. If that doesn't help then it could be the motor getting ready to take a dump on you. But like I said alot of trucks headlights dim under load all the plow trucks that i've owned did, even my diesels with 2 batteries and heavy duty alternators.
  6. Tvov

    Tvov LawnSite Bronze Member
    from CT
    Messages: 1,157

    If this just started happening, it could be because of frigid weather. Even when it is not that cold (like, maybe, 25 degrees {!}), when I first start out plowing the electric draw is great until everything warms up and gets moving. But even after warming up, lights have always dimmed when I use the plow.
  7. General Grounds

    General Grounds LawnSite Senior Member
    Messages: 902

    :blob3: hey guys, i understand that the lights will dim, yes but it is signifingant, i do have a heavy duty alt. and the battery is a new interstate, it is so obvious that the fan fir the heat varies alot. tony
  8. kipcom

    kipcom LawnSite Senior Member
    from indiana
    Messages: 352

    Tony, as you have already heard...Not knowing what type plow and vehicle you have I will say this. Almost every plow will dim lights, slow the fan blower, make the volt meter go negative volts....mostly due to the older plows drawing so much amperage. As long as your alternator can produce more voltage than is being used, you wont end up with a dead battery or system.

    If you know how or know someone who does...why dont you check the amp draw at the plow motor. Meyer / Western / Boss / Curtis and others have specs on their websites.

    I feel GOOD !!!!! :cool2:
  9. CCWKen

    CCWKen LawnSite Member
    Messages: 113

    Check all the ground connections. The battery to ground (chassis) connection is usually the culprit. Depending on the pump, it's common for the motor to draw anywhere from 85 to 200 amps. That's more than enough to dim lights.

    Also, Check to make sure you don't have any of the hydraulic lines pinched or kinked. If this is an older unit, the flex lines will deteriorate and all but seal or close-up. The motor/pump has to work harder to overcome the blockage.
  10. Staffordnurseries

    Staffordnurseries LawnSite Member
    Messages: 34

    Mine was acting terrible just like that, dimming even stalling the was connections. No heavy alternator, no great battery and it works fine now with very clean connections...they didnt seem to look dirty, but they must have been just in the right spot

Share This Page