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Can someone explain this

Discussion in 'Dozers' started by StxRancher, Jun 29, 2016.

  1. StxRancher

    StxRancher Well-Known Member

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    Why are the pins ground down? I'm new to the dozer, so please forgive if it seems like a juvenile question. Both tracks are like this 20160626_125639.jpg
     
  2. Twisted

    Twisted Senior Member

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    They are rubbing on something. Must be a roller or rock guard. Check along the bottom and see if there is something bent or broken.
     
  3. lantraxco

    lantraxco Senior Member

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    Probably rock guards all right, from the look of those some big rocks stuck in her.
     
  4. John C.

    John C. Senior Member

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    Be careful of sticking your hands down there. I'm thinking ten thousand razor blades being pulled off something hard.
     
  5. jjimbo

    jjimbo Active Member

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    Is this a high drive machine and if so are both inside and outside of pins wearing?
     
  6. Delmer

    Delmer Senior Member

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    It's a little hard for me to tell from the picture, is that scraped metal showing? or white powder from crushed rocks?
     
  7. Scrub Puller

    Scrub Puller Senior Member

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    Yair . . .

    Double post.
     
    Last edited: Jun 30, 2016
  8. Scrub Puller

    Scrub Puller Senior Member

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    Yair . . .

    Something out of whack with that picture . . . those tracks haven't been working, they still have rust on surface of the rails.

    The picture is inconclusive, weird is how I'd put it.

    Cheers.
     
  9. StxRancher

    StxRancher Well-Known Member

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    Your prob right,I bought it on auction..Both sides of outside tracks are like this..I think machine Sat for a while then owner decided to get it running to sell. Very little wear on pins. It's shiny metal, not rock powder
     
  10. Dickjr.

    Dickjr. Senior Member

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    Post more pics of all the undercarriage parts. Could be a bushing out of an idler etc letting it favor on side then the other.
     
  11. StxRancher

    StxRancher Well-Known Member

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    Not a high drive, I also notice a few sprocket teeth broken
     
  12. caterpillar13

    caterpillar13 Well-Known Member

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    my guess is that they stole the good tracks off of it and thru some junk on it, i have seen this a few times on cats at auctions where pins and bushings and sprockets and rollers are dragging in strange places.
     
  13. StxRancher

    StxRancher Well-Known Member

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    Another pic 20160626_125645.jpg
     
  14. Nige

    Nige Senior Member

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    Post some good pics of: -

    1. Sprockets
    2. Carrier rollers.
    3. Track rollers.
    4. Front idler (from closer up that the photo above)
    5. Lower roller guards from front or rear of tractor, whichever is best, to try to show if the track pin ends are rubbing on the guards.

    What machine is it you bought..?
     
  15. StxRancher

    StxRancher Well-Known Member

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    It's a jd 450c
     
  16. d9gdon

    d9gdon Senior Member

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    Bottom rollers are worn out is my guess.
     
  17. Nige

    Nige Senior Member

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    I tend to agree with you, Bottom roller wear usually results in the links contacting the rock guards. The idler in post #13 looks pretty poor to me, but the photo isn't really taken from close enough to be 100% sure. That's why I asked for more photos showing the rest of the undercarriage components.
     
  18. StxRancher

    StxRancher Well-Known Member

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    How hard are the bottom rollers to replace..are they worn because they no longer have the proper height, or worn because the bearings are no longer good?
     
  19. StxRancher

    StxRancher Well-Known Member

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    My dozer is about 75 miles away from me right now, so I can't get anymore pics till the weekend..also the pins have no wear on them???
     
  20. Nige

    Nige Senior Member

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    No worries, unless that is you're planning to work the machine a thousand hours or so between now and taking the photos. Post the photos when you can.
     
    Last edited: Jun 30, 2016