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IndustryArena Forum > MetalWorking Machines > HURCO > Hurco KM3 BELT CHANGE
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  1. #1
    Join Date
    Apr 2009
    Posts
    11

    Hurco KM3 BELT CHANGE

    Anybody done a variable speed belt change, and, bearing change on a Hurco KM3 head.


    I will put pictures up as I do it.

    Thanks

    First thing I did was to remove main motor at back of ram!
    .............disconnect wireing from motor box
    .............undo cap heads under motor on lower casting
    .............undo nut holding tensioner spring, carefully, lever brake on side to stop motor turning



    Wireing, note wire positions ...........
    U


    Bottom Plate x 3 cap heads........





    Lever Brake on to stop motor turning .......



    Undo nut, watch for spring?...... keeping brake on!







    Undo cap heads holding motor....... remove



    Check the Nylon Splined Bush, any excessive wear, change if possible.




  2. #2
    Join Date
    Apr 2009
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    Anybody done a variable speed belt change, and, bearing change on a Hurco KM3 head.


    I will put pictures up as I do it.

    Thanks

    First thing I did was to remove main motor at back of ram!
    .............disconnect wireing from motor box, making a note of where they go!
    .............undo cap heads under motor on lower casting
    Attached Thumbnails Attached Thumbnails KM3-005_7.jpg   KM3-A.jpg  

  3. #3
    Join Date
    Apr 2009
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    Next, while holding the brake on, using a socket undo the nut holding the tension spring on.

    Obviously, undo while keeping the pressure on

  4. #4
    Join Date
    Mar 2024
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    I initially took the Head off before undoing the Spring, better to undo spring with Head still on as above.

    Then removed the brake solenoid using a 10mm spanner

    .
    Attached Thumbnails Attached Thumbnails 33-36pic.jpg   37-48pic.jpg  

  5. #5
    Join Date
    Mar 2024
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    Found this document online somewhere, it says put the spindle to max speed, unfortunately my machine was'nt working when I got it so I could'nt do that anyway.

    I have already removed the Spindle motor cover and Spindle Motor, left the belt.

    .

  6. #6
    Join Date
    Mar 2024
    Posts
    11

    Re: Hurco KM3 BELT CHANGE


  7. #7
    Join Date
    Mar 2024
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    Attached Thumbnails Attached Thumbnails 38-40.jpg  

  8. #8
    Join Date
    Mar 2024
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    I Have tried to put the pictures in some sort of order, but it was removed a while ago, so check as you go along.

    took a picture of the chain length to remind me how long it was, so that it goes beck the same.


  9. #9
    Join Date
    Mar 2024
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    I removed nut and measured it, just in case?

    Attached Thumbnails Attached Thumbnails Picture7.jpg  

  10. #10
    Join Date
    Mar 2024
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    The Head woud'nt lift off cleanly and easily, probably because the dowels were a tight fit, I tried to use Aluminium levers but I was concerned about damaging the casting, so I opted for gentle pressure using threaded rod which allowed me to lift the head equally all round.




  11. #11
    Join Date
    Mar 2024
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    Heads finally off, here's a view of all the Belt numbers

    37/10/850

    40173 x 1 1/4 B9N1 (Made in UK) Powergrip


    Attached Thumbnails Attached Thumbnails Picture10.jpg  

  12. #12
    Join Date
    Mar 2024
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    With the spindle regulating (no6 in the manual) top plate and disc/variable angled plate off, I removed the belt by sliding it over the pulley-difficult, not the right thing to do but I was'nt sure if I should undo the pulley nut as I was'nt familiar with the setup, so I opted for the obvious and easiest, and I was replacing it.




  13. #13
    Join Date
    Mar 2024
    Posts
    11

    Re: Hurco KM3 BELT CHANGE

    Finally off, belts in a right mess, so new belts and new bearing



  14. #14
    Join Date
    Feb 2006
    Posts
    171

    Re: Hurco KM3 BELT CHANGE

    Thank You MacDave 73
    Appreciate the magnificent work and pictures !
    rich

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