400x loader question
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    400x loader question

    Recently bought my first John Deere tractor, a 2004 4710. The previous owner was not kind to this machine. I have been replacing parts left and right. I have run into an issue and was wondering if anyone has seen this before. I have already figured out how I will fix it but wanted to know if there is a factory repair before I start. Thanks in advance for your help.
    Attached Thumbnails Attached Thumbnails 20170110_173659.jpg   20170110_173728.jpg  

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    Captain Hook Kennyd's Avatar
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    Welcome to GTT,
    Wow that is quite a bit of wear on the pivot, never seen one that bad before. Is that just on one side or both?
    Kenny

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    It looks like both sides Kenny.
    I have not see that much wear on a loader. There is not alot of iron left in front of those pins.
    How could that much wear happen? The pins should not turn.
    How many hours does the tractor have on it.
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    Pics show both left and right sides. Tractor has 2800 hours. Loader that came with the tractor has a 2" twist in the boom and several poor welds. I removed it. This loader I bought from a guy who said it rarely got used. The rest of the loader looks really good.

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    dzldanz's Avatar
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    In my neck of the woods the local Cat dealer does line boring repairs on site for these type of repairs. Mind you their equipment may be a bit larger.
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    Line boring

    Quote Originally Posted by dzldanz View Post
    In my neck of the woods the local Cat dealer does line boring repairs on site for these type of repairs. Mind you their equipment may be a bit larger.
    That would be my choice as well but I've never seen that sort of wear except in an instance where a pin/axle was running in dirt. Our IH 784 with thousands of hours on the loader doesn't have anywhere near that kind of wear. I have no idea how the previous owner managed to accomplish that unless they were injecting grit instead of grease.

    Treefarmer
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    My plan was to bore the hole out larger (and round) to install a bushing. I do have another question- Has anyone every built a brace to connect the two masts together? I understand it would have to cross over the cowl and not over the hood to allow the hood to open. I think this would strengthen the loader structure and stop any movement that probably caused the problem in the first place. The loader masts are twisting when the loader goes up. Good idea or not?

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    Captain Hook Kennyd's Avatar
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    Loader mast's are twisting? That is NOT normal so you have another problem that shouldn't be masked by welding other parts in.

    Are you sure there is no cracks in the boom, like around the torque tube (the big round tube)?

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    69project likes this.
    Kenny

    -John Deere 3720 Deluxe Cab TLB
    FEL, MMM, Artillian 42" Forks and Modular Grapple, I-Match, Ballast Box, and lots of other STUFF.
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    Visit our YouTube Channel

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    Quote Originally Posted by Kennyd View Post
    Loader mast's are twisting? That is NOT normal so you have another problem that shouldn't be masked by welding other parts in.

    Are you sure there is no cracks in the boom, like around the torque tube (the big round tube)?

    Click image for larger version. 

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    They are twisting because of the worn pin holes. The boom isn't flexing. I can't see how the torque tube would cause that anyway. More likely that the bushings in the ends of the loader boom are deformed or improperly installed. I'll inspect those when I take it apart to fix the holes.

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