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New Lift Unit Motor

Discussion in 'Blizzard Plows Discussion' started by prayforsnow, Feb 2, 2012.

  1. prayforsnow

    prayforsnow Member
    Messages: 35

  2. prayforsnow

    prayforsnow Member
    Messages: 35

    Thankfully I didn't need a new motor. My problem was bad ground. With a dedicated ground cable my plow has never lifted this fast. Thumbs Up

    After looking at the DB website, I found several CW 12volt 9 spline motors with the same dimensions, but no other was rated at 4.5 hp.
    Also the one listed in the post above was a cross-reference to the SPX 1787AC.

    Hopefully, this will help somebody...

    PFS
     
  3. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,965

    hey pray,,,how did you direct grond it?? maybe a pic???
     
  4. Jerre Heyer

    Jerre Heyer Senior Member
    Messages: 948

    Common problem on all plows is the power and ground feed. Have been doing a lot of updates with 2 GA wiring and Anderson connectors.

    As far as the motors go there is a different Fenner part number for the HD motors. Don't have it handy but they will also be a dual stud motor now.

    J
     
  5. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,965

    thanks Jerre
     
  6. fastjohnny

    fastjohnny Senior Member
    Messages: 654

    1789AC is an extended duty that works in place of the 1787AC
     
  7. prayforsnow

    prayforsnow Member
    Messages: 35

    Howdy,

    Jerre...

    Dedicated power and ground cables seem the best way to go...hands down, no argument.

    dieselss... You enjoyin' your lake snow?

    I took the motor off, so I had to remove the two screws holding the "end cover" on and remove the two bolts that attach it. To test it I just took a 3ga cable I had (w/copper ends, attached to the battery) and put it under the bolt that attaches the motor, tightened it down and voila.
    That baby spun like a drunken monkey... ;)

    My thought is a 10ga(good to 30 amps) or 8ga(good to 40 amps) from the ground attachment point on the a-frame to the motor should supply a significant ground for the motor. I'll check it while I'm running to see if it can take the load/time.
    My motor has a small rubber plug on the edge of the "end cover" w/two small holes in it...I should be able to run a 8ga wire through there for the ground.
    I will take pictures.

    I have also heard of welding a stud onto the motor for a dedicated ground strap. I might do that...but welding on the motor makes me a little nervous... :eek:

    Fastjohnny...
    Thanks for the number of the HD motor.

    Cross-referencing that 1789AC# comes back to the same motor at DB...

    http://www.dbelectrical.com/p-3328-new-pump-motor-fenner-waltco-maxon-dell-liftgates-lfs0002.aspx

    That motor in the picture looks like it has the dual screws to mount the solenoid on it. It does come with a 1 yr warranty...that's more than I usually see for electrical components.
    For the money, I think it'd be worth trying...

    On another note...
    The one thing I have had the most trouble with is the OEM multi-plug that came on the plow. Thinking back, almost all the troubles I've had with the plow have traced back inside that plug.

    I understand some guys need to swap plows and trucks during storms and want them all to interchange, but I'm going to eliminate that plug completely on my truck with dedicated cables and a heavy-duty weather-proof plug.


    PFS
     
  8. viper881

    viper881 Senior Member
    Messages: 458

    Intrested in the welding of the stud on the motor. I thought about the same thing but was nervous to do it becasue of all the copper inside.
     
  9. prayforsnow

    prayforsnow Member
    Messages: 35

    Howdy,

    I ran the "weld a stud on the motor" idea past my guy at the welding shop and he didn't blink an eye...said he could do it no problem, no worries about frying anything.

    I'm guessin heat sink (cold rag), and short bursts.

    Also talked to him about building me a wing, since I bent one last year. When I bring it over and get a price I'll post it here. I told him he could probably sell a few if he can do them for a decent price.

    PFS
     
  10. Jerre Heyer

    Jerre Heyer Senior Member
    Messages: 948

    Keep the stock harness and add an additional power and ground harness set up. We make them up and ship them all the time. Need truck side lengths . Plow side is all the same.

    As far as the weld a stud you can usually tap one of the holes in the casing and put a bolt in it.

    J