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Sheared bolts on bore plate?

Discussion in 'Compact Track/Multi Terrain Loaders' started by Jeffrey Bandel, Jan 21, 2021.

  1. Jeffrey Bandel

    Jeffrey Bandel Well-Known Member

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    CAT0299DLGTC00836

    I went to grease up today and noticed the plate over the "bore?" (that's what the manual calls it) was missing. The grease zerts were sheared off and the bolts are broken off an inch inside the frame. Any suggestions?
     
  2. Jeffrey Bandel

    Jeffrey Bandel Well-Known Member

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  3. Tones

    Tones Senior Member

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    I saw a mates 922 bout to have the same problem. Every time he changed direction the track frame would hammer against that plate. When I told what was going on he said the tracks and sprockets were worn and that's what the thumping noise was. So I hopped onto the seat so he could see for himself and seeing is believing. He was waiting for the delivery of a new one so wasn't to concerned .
     
  4. Jeffrey Bandel

    Jeffrey Bandel Well-Known Member

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    My tracks and sprocket look good. I can't just order another plate because the bolts are broken inside the bore.
     
  5. 92U 3406

    92U 3406 Senior Member

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    Drill and extract with an ez out.

    Either that or replace the torsion axle (which is $$$)
     
  6. Nige

    Nige Senior Member

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    Those two bolts and the cover look awful small for the size of the track frame assembly. That would indicate to me that in normal use they are not going to carry much in the way of load. If that is the case then wouldn't the amount of thrust required to shear the bolts be an indication of something amiss (aka worn) deeper inside the assembly..?
     
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  7. Jeffrey Bandel

    Jeffrey Bandel Well-Known Member

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    Probably. What is the name/function of it?
     
  8. Nige

    Nige Senior Member

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    Are there not bushes in the track frame at both the inside end and outside ends of the axle shaft..?
    Wear in those would be my first thought. #3 in the illustration below.

    upload_2021-1-22_16-30-49.png
    upload_2021-1-22_16-29-17.png upload_2021-1-22_16-29-45.png
     
  9. 92U 3406

    92U 3406 Senior Member

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    There is a spacer between track frame and torsion axle. Seen them break and then you get about 3/8" end play and it just pounds that little plate until the bolts fatigue and break.
     
  10. Tones

    Tones Senior Member

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    Exackery. That was the thumping as per my earlier post.
    Jeffery, after you fix this side check the other side. You'll see the movement I described.
     
  11. Jeffrey Bandel

    Jeffrey Bandel Well-Known Member

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    Assuming I can get the bolts out, I need to get a spacer and a plate and reinstall?
     
  12. 92U 3406

    92U 3406 Senior Member

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    The spacers are item #3 in the 2nd pic Nige attached. You should be able to see them if you can get the track frame moved out and away from the machine slightly.
     
  13. Tags

    Tags Senior Member

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    If you notice the spacers are missing you'll have to remove the track frame from the torsion axles to replace them, that may make it a little easier to remove the bolts. Usually a broken bolt like that will spin out fairly easy because it no longer has any tension on it, sometimes you can hook it with a small pick or you could try a reverse drill bit. Or as was mentioned, just drill it and use an easy out. If the spacer is there and you have to work on it as is, I would run it up on some blocks to get it at a better working height.
     
  14. Nige

    Nige Senior Member

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    Jeffrey, If I'm reading 92U3406 & Tones right the spacers are on the INSIDE. There are four of them Item #3 (circled), so it's not just a case of getting a new one and installing it under the (currently missing) plate on the outside. Some disassembly will be required if you discover the inside spacer is missing, but as Tones said the disassembly may actually improve the access to remove the broken bolts.

    It's also my guess that, if you find the inside spacer is indeed AWOL, that the bushings in the outside of the track frame will also be pretty well pounded out as a result of the back-and-forth movement resulting from the missing spacer. Co-incidentally they are also Item #3 (but a different Part Number) in the second illustration.

    upload_2021-1-23_15-37-48.png
    upload_2021-1-23_15-42-53.png
     
  15. 92U 3406

    92U 3406 Senior Member

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    I've replaced a few of those bushings. Not sure about the 299D specifically but on the 289D they're just a chincy little split bushing. Most cases they can be removed with a punch and hammer. New ones don't sit super tight and usually can be driven in with a bushing driver and hammer.

    Its not a super huge job to get the track frames off. Jack/block up the machine level. Then if you take the hose guard/guide off the frame and snip a few zip ties on the drive hoses/speed sensor wires under the cab you can pretty much just slide the whole frame out of the torsion axles with a pallet jack, forklift or overhead crane without removing hoses. Don't need to take it out super far, just enough to do what you need to do.
     
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  16. Nige

    Nige Senior Member

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    Track off first I assume..?
     
  17. 92U 3406

    92U 3406 Senior Member

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    I've always left the tracks on the frame when I've done it.
     
  18. Nige

    Nige Senior Member

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    I guess with them being rubber tracks it doesn't make a lot of difference weight-wise. I wanted to clarify for Jeffrey's benefit if the track needed to come off or could stay on.
     
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  19. 92U 3406

    92U 3406 Senior Member

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    For some reason I struggle with those rubber tracks. So if I can avoid taking them off I will.
     
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  20. Jeffrey Bandel

    Jeffrey Bandel Well-Known Member

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    So I jack up and level the machine, remove the the hose plate, snip the zip ties, remove the bolts and plate from the front torsion axle, get something that will lift it up, the whole frame will slide out. Does that sound right?