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Cat 140m and Deere 770GP

Discussion in 'Motor Graders' started by Shawnr204, Feb 9, 2019.

  1. Shawnr204

    Shawnr204 New Member

    Joined:
    Feb 8, 2016
    Messages:
    2
    Location:
    Canada
    Hi. Have some questions for you fellas. I’m from Canada, and we do snow clearing inside the city. A lot of our manholes are not flush with our city streets and we are frequently hitting them with our graders. It’s impossible to remember where everyone is as we have a fairly decent size city. Our 3 Cat 140m’s have all bent the circles to the point where the shims fall out and circles need replacing at a 30k dollar bill. 2 of the 140’s have bent 2 circles each. They only have around 3-4000 hours. Is this common? Our new 770GP is snapping the circle shims and breaking them right off, but at a much cheaper repair bill, it is still a pain with only 400 hours on it now, it’s done this twice. We used to run Volvo and champion graders and never ever had these problems. Curious if any other city operators have this same situation, and if the 160’s or 870s would stand up better? Love the Cat M series graders, but they aren’t holding up well. Not a fan of the GP’s but they do seem more stout at this moment. But like I said it is still very new with only 400 hrs.
     
  2. Fatgraderman

    Fatgraderman Well-Known Member

    Joined:
    Sep 16, 2014
    Messages:
    216
    Occupation:
    Crash test dummy
    Location:
    Innisfail
    Sounds to me like it’s time the city invested in some tapered rings around the manhole covers. Fortunately for me, I haven’t had to deal with any manhole covers in 7 or 8 years. I’m a little surprised to keep hearing about bent circles, but an operator in the Maritimes made the same complaint in another thread. Must have changed the quality of steel a bit, as I’ve also seen a couple of 140m’s that developed breaks at the front of the frame by the v-plow/ push block mount. The only issues I remember the county having with the old G’s was the arches on the bottom of the circle breaking. I came from a Champion background as well, and there were a few years there that they ended up being a really good machine, and then when the October 2002 emissions came in, they went down fast. I’ve been plesently surprised how good the Deere’s I run have been, but it sounds like we aren’t in as tough of conditions.
     
  3. cuttin edge

    cuttin edge Senior Member

    Joined:
    Nov 9, 2014
    Messages:
    647
    Occupation:
    Finish grader operator
    Location:
    NB Canada
    One thing I find is if you keep the mb under your control, it tends to bounce the machine over the lip of the manhole frame. If you use float, the mb tends to grab harder and do more damage. Obviously if the manhole is up really high, it's gonna hurt no matter what. I have heard of machines Cats junking circles though.
     
  4. Cat 140M AWD

    Cat 140M AWD Well-Known Member

    Joined:
    May 31, 2012
    Messages:
    123
    Occupation:
    Motor grader operator
    Location:
    Montrose S.D
    I agree with fastgraderman it would be in the city’s best interest to fix the manholes therefore eliminating your problem.
     
  5. cuttin edge

    cuttin edge Senior Member

    Joined:
    Nov 9, 2014
    Messages:
    647
    Occupation:
    Finish grader operator
    Location:
    NB Canada
    I plowed for the province one winter with the grader on by the hour. I did 2 Indian reserves, terrible man holes. I junked one of the government one-way plows hitting one. Hit many with the mb mentioned it several times. They said be careful
     
  6. 20/80

    20/80 Well-Known Member

    Joined:
    Jul 30, 2013
    Messages:
    215
    Occupation:
    operator
    Location:
    nova scotia canada
    We have had 1 bend the circle and the pivot support beam ahead of the circle on our year old 140m just doing maintenance grading, Cat covered it, I believe Cat recognizes that there is a problem with the circle bending on some machines, Cat did a thorough CSI on our machine before covering it under warranty though.
     
  7. John C.

    John C. Senior Member

    Joined:
    Jun 12, 2007
    Messages:
    5,479
    Occupation:
    Machinery & Equipment Appraiser
    Location:
    Northwest
    Do these machine have accumulators are are they turned on when this happens?