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John Deere 650H moving slowly

Discussion in 'Dozers' started by Ron4108, Aug 11, 2019.

  1. Ron4108

    Ron4108 Member

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    New member and my first posting here.


    I recently purchased a 2000 model John Deere 650H with a cab, when I bought it the seller mentioned it had a small fuel leak.

    Well it turned out the leak was a cracked weld on the tank.

    I removed the cab and had the tank repaired then reinstalled the cab.

    Now for the problem,

    The dozer will not move any faster than a walk.

    It tracks straight and shifts , engine speed is normal as it was before. No codes on transmission control, it shows RUN .

    Could this be a speed sensor problem?

    Thanks,

    Ronnie
     
  2. mg2361

    mg2361 Senior Member

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    Welcome to HEF Ron;)! First we need to know the serial number and if your unit has the speed in grip or a speed lever. If you have no codes then it might just be a controller setting, which is why a serial number is needed, to access the correct information.
     
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  3. Ron4108

    Ron4108 Member

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    Last of the serial number is 890637, if you need the complete number I’ll get it. This has a throttle lever on left side behind the joystick controller.
    Thanks,
    Ronnie
     
  4. Vetech63

    Vetech63 Senior Member

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    Get the letter before the 8. Sometimes that is needed.
     
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  5. Ron4108

    Ron4108 Member

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    HX890637
    Ronnie
     
  6. mg2361

    mg2361 Senior Member

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    Your serial number tells me you have a speed in grip. Did you get an operator's manual with the machine? On the left pilot controller there should be a button that can be pressed up and down. Try pressing up while traveling. Does it go faster? When pressing the up button you should see numbers in the monitor change from about 1.6 all the way up to 3.0. Does that happen?
     
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  7. Ron4108

    Ron4108 Member

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    Yes it has the speed in grip. Yes the numbers go up to 3.0, the machine will go a little faster when in 3.0, about as fast as I can walk. I did not get an owner manual when I bought it, but ordered a new one from John Deere and have it on hand.
    Ronnie
     
  8. mg2361

    mg2361 Senior Member

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    Try this. Remove the cover from the transmission controller. With the key on press menu until "RATE" appears in the window. Press select. You should see "decl" in the window, press next until you see "HiSP". Press select. Then press next until "HIGH" appears, then press select. After that press menu. Then try your machine to see if it will move faster.
     
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  9. Ron4108

    Ron4108 Member

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    Thank you, I will try that this morning and let you know if it works.
    Ronnie
     
  10. Ron4108

    Ron4108 Member

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    Tried that and it is still the same.
    Ronnie
     
  11. mg2361

    mg2361 Senior Member

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    You mentioned you had the cab off. Did the machine move normal speed before the cab removal? Otherwise, my next suggestion would be to have the transmission calibration procedure done. If you do not have the Operation and Test manual (TM 1743) then you either need to acquire one or have your dealer do it.
     
  12. Ron4108

    Ron4108 Member

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    Thanks, yes everything worked fine before I removed the cab. I do have that manual and will see if that’s something I want to try or have the dealer perform.
    Ronnie
     
  13. mestizo

    mestizo Well-Known Member

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    Beware if you’re going to calibrate the machine and you don’t know whats wrong, if the machine fails calibration it won’t move until you fix whatever is causing the issue.

    So calibrate it somewhere out of the way.

    Might help to check charge and brake pressure and do a PCP test first, instructions are in the op and test manual
     
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