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Truck stall when moving plow.

Discussion in 'Truck & Equipment Repair' started by WWsnow, Jan 28, 2009.

  1. WWsnow

    WWsnow Junior Member
    Messages: 2

    1997 GMC pickup with meyers plow.Truck will run good.Driving down the road angle plow to the left or right truck will act like its lossing power. New alt ,new battery. Can see volt gauge drop.checked voltage at battery with truck running in gear drops a little. please help
  2. Sno Biz

    Sno Biz Member
    from Chicago
    Messages: 55

    Sounds like too many amps for the Alternator to handle. What size Alternator are you running? how new is the plow motor?
  3. WWsnow

    WWsnow Junior Member
    Messages: 2

    not sure about age of pump.Alt is 105 amp. Also if i unhook plow and use control pad to move left or right. Truck still wants to die.Cleaned all grounds.
  4. Pirsch

    Pirsch Senior Member
    Messages: 596

    I'm not into plows but I would have to say is that the plow motor is drawing severely on your electrical system. Idea for you to try if you don't want to spend the money on a new plow motor... Find a Salvage yard that has a Chevy Chassis Ambulance. Get that alternator from it. You'd be surprised how much pwr those things have.
  5. hydro_37

    hydro_37 PlowSite Veteran
    from iowa
    Messages: 3,790

    Clean ALL plow electrial connections but I am guessing the plow motor is going bad.
  6. BigDave12768

    BigDave12768 PlowSite.com Addict
    Messages: 1,446

    Make sure you ground is good at the battery.. And the 105 sounds a bit low for a plow,
  7. sechracer

    sechracer Senior Member
    Messages: 478

    What do you mean unhook the plow? without the plow attached at all as in not even close to the truck? but definitly sounds like a bad motor or connection.
  8. elite1msmith

    elite1msmith 2000 Club Member
    from chicago
    Messages: 2,762

    your pump solinoid is more than likely shorting.....
  9. no lead

    no lead PlowSite.com Addict
    Messages: 1,308

    loose connection at the batt or motor or soleniod.
  10. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    Sounds like the pump motor is about to fry. If you have cleaned all the connections and protected them with dielectric grease and it still does it. I would replace the motor. The bushings and bearings get real worn and the brushes wear out. All causing the motor to pull way too many amps. Might do it soon. I have seen motors freeze and fry all the wires from the solenoid to the pump before they could let go of the switch. Since your battery is new and is charged up when it happens it should not be that system.
  11. wildbro 1

    wildbro 1 Junior Member
    Messages: 15

    you want at least a 140 amp alt it could be the pump inside the reservoir is worn out and when you go to angle or anything its so stiff its killing your power
  12. carl b

    carl b PlowSite.com Addict
    from Ohio
    Messages: 1,330

    My 94 Chevy has done that for years . 2 year old Meyer motor, 2 new batts this year, new solenoid. two weeks ago . all my wires are fine it just draws allot of power i guess
  13. wildbro 1

    wildbro 1 Junior Member
    Messages: 15

    how old is the plow
  14. wildbro 1

    wildbro 1 Junior Member
    Messages: 15

    if it is as old as the truck replace the pump in the reservoir its a gear pump that is the heart of the unit
  15. carl b

    carl b PlowSite.com Addict
    from Ohio
    Messages: 1,330

    Sorry Its a e-60 . I got it used so the year is unknown but , I had a shop do the gear pump 3-4 years ago .
  16. gottaloveOT

    gottaloveOT Senior Member
    Messages: 116

    I had a ford that would literally die if you tried to move the plow. It would stall the motor (i'm guessing not completely but you couldn't hear it running anymore), but as soon as you let off the control, it would start running again. It was the weirdest thing I ever saw. Found the battery cables were crap. Replaced them, worked great after that.
  17. meyere60

    meyere60 Senior Member
    Messages: 106

    it mite be the plastic washers that are between the pump housing and the positive stud on the motor, causing it to ground out. this happened to mine. try turning the whole positive bolt on the motor a little and see if that helps.
  18. wildbro 1

    wildbro 1 Junior Member
    Messages: 15

    try running a 2 more cables 1 going to the ground on battery to bolt holding the alternator
    and 1 from positive on battery to the positive on the back of the alternator
  19. Snowplow71

    Snowplow71 Senior Member
    Messages: 284

    Not sure if you fixed this problem or not, but I had a sub's Chevy 1500 do the same thing with his meyer plow. Turned out to be a bad ground. I want to say even if he was on the brake it did it also. Just my 2 cents