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Raising plow kills truck

Discussion in 'Truck & Equipment Repair' started by Mayn, Dec 11, 2009.

  1. Mayn

    Mayn Junior Member
    from midwest
    Messages: 5

    I have a Western Pro Plow, and when trying to raise plow the truck will kill. It will turn left and right with a draw, but does not kill truck. I have checked the filter, cleaned all connections, checked and rechecked fluid level and filled to proper level, replaced solenoid with Western solenoid. The ironic thing is that at times it will lift and other times it will not. Pulling out what is left of my hair, and need help. Thanks for any suggestions.
     
  2. Deco

    Deco Senior Member
    Messages: 453

    check battery and alternator for proper voltage
     
  3. Mayn

    Mayn Junior Member
    from midwest
    Messages: 5

    I did put jumper cables on another battery and hooked to the plow vehicle, with no difference. Alternator shows around 14 volts. However I had someone with me one day, and the alternator gauge was fluctuating. Could a weak alternator cause that?
     
  4. Deco

    Deco Senior Member
    Messages: 453

    sure can , need proper volt/amps to operate
     
  5. Mayn

    Mayn Junior Member
    from midwest
    Messages: 5

    Thanks Deco. Already put in $120 so what is another $125 or so? LOL. Off to get a new alternator. Thanks again. Hoping this will take care of it. Been a frustrating couple days with the 15": of nice wet snow.
     
  6. clark lawn

    clark lawn PlowSite.com Addict
    from NE ohio
    Messages: 1,233

    get it tested first dont just start throwing parts at it when you dont know for sure they are bad.
     
  7. 4Seasonsmgt

    4Seasonsmgt Junior Member
    Messages: 13

    It could also be possible that the battery is shot. My trucks have the dual batteries and if one is dead or about to die i get some weak amps.
     
  8. PlowBoy85

    PlowBoy85 Junior Member
    Messages: 9

    Same problem with my rig, about an hour after I start plowing, im lucky if the plow will lift half way up the stroke of cylinder....looking into new batts and 200 amp alternator, i'll let you guys know how it works out..
     
  9. Crash935

    Crash935 2000 Club Member
    Messages: 2,377

    Take it to a shop that can check the alt and battery on the truck and have them check the draw on the plow motor also. Heavy draw at the plow motor will kill a truck and if youve checked all the connections then its the plow motor.
     
  10. no lead

    no lead PlowSite.com Addict
    Messages: 1,308

    i second the motor, unless you have a very bad ground.:nod:
     
  11. flattoplawncare

    flattoplawncare Junior Member
    from mn
    Messages: 4

    Me too

    I just had the same prob, I noticed my positive stud that goes into the motor worked its way out and the plow was moving really slow all ways. Then I tightened it up and then it started to kill my truck when i moved the plow. So I loosened the bat cable just a little bit and now it works fine. Maybe I made it too tight and it was grounding itself out on the frame of the motor.
     
  12. Mayn

    Mayn Junior Member
    from midwest
    Messages: 5

    Hey Plowboy, let me know if that takes care of it, I am still having problems with mine. I have had battery tested, solenoid replaced, alternator replaced which was junk, motor tested, all connections cleaned and tightened, pump checked, filter checked, fluid level checked and filled, still cannot find out what is going on. I have gone through the Mechanics Guide but still not having much luck. It will raise if you rev engine, but very slow and only a second at a time or it will kill out engine.
     
  13. basher

    basher PlowSite Fanatic
    from 19707
    Messages: 8,992

    Always replace BOTH batteries at the same time, never replace just one.


    To the OP maybe a bad motor, or may be the power plugs at the grill. they rot internally. Could explain the intermittant action.
     
  14. Plowfixguys

    Plowfixguys Senior Member
    Messages: 222

    Before you start throwing parts at it, do a voltage drop test on the (+) and (-) side of the cables. Just because they look clean and you cleaned them don't mean they don't have a voltage drop. Using a volt meter hook one end to the battery (+) at the battery and other end to the (+) at the motor, run the plow, if you see any more then about .50 volts on the meter repair or replace the cable until the reading is .50 or less. Do the same on the (-) cable. We see this all the time. Just remember that just because the cable looks good doesn't mean it is, the only way to tell for sure is to do a voltage drop test.
    Good luck
    Robert
     
  15. basher

    basher PlowSite Fanatic
    from 19707
    Messages: 8,992

    A continuity test for resistance works also.:nod: has the added advantage of isolating which side of the harness is at fault.
     
  16. Plowfixguys

    Plowfixguys Senior Member
    Messages: 222

    A resistance test can and will lead you in the wrong direction, if you have cable with half the wires broken and you use an ohm meter, it with show good, if you do a loaded voltage drop test you will find a huge voltage drop. Same gos for bad connections, you have to have a heavy load similar to the load that cable will be carrying to get accurate results. Ohm meters are for low voltage, low current electronics.
     
  17. basher

    basher PlowSite Fanatic
    from 19707
    Messages: 8,992

    Point taken.

    But we deviate from the issue under discussion, attempting to raise the plow kills the truck.
     
  18. Plowfixguys

    Plowfixguys Senior Member
    Messages: 222

    Mayn
    Did you get that rig fixed yet?
     
  19. Mayn

    Mayn Junior Member
    from midwest
    Messages: 5

    No I have not got it fixed. I am going to check the cables today and go from there.
     
  20. REAPER

    REAPER 2000 Club Member
    from 60050
    Messages: 2,228

    What kind of truck?

    I had a older 1988 GMC with a western that did this same thing. It was corrosion build up in the ground cable itself. I replaced both positive and negative that went from battery to plow motor and it did the trick.

    This is assuming you already have a high amp alternator and not just the stock one. Also make sure the cable from alternator to battery is in good shape. If one is bad anywhere I would replace all of them.

    Also make sure your belt tension is staying at a proper tension and your belt is not slipping on the alternator.