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  1. #1
    Gold Member
    Join Date
    Dec 2005
    Posts
    323
    Location
    BAR BOB Ranch, Needville Texas
    Tractor
    Kubota 3400HST

    Default PTO won't cut-off

    Wet clay got stuck to auger on phd causing excessive vibration. Since then pto won't always stop. I can't see any obvious adjustments. Any ideas?

  2. #2
    Veteran Member rbargeron's Avatar
    Join Date
    May 2000
    Posts
    2,466
    Location
    MA
    Tractor
    L5450, L48, L3250, L345

    Default Re: PTO won't cut-off

    Some questions - what model tractor? 2-stage clutch? How many hours? Is the pto engagement mechanical or electric? Did the pto disengage ok before the vibration event? When the pto fails to stop, does it still drive with full power? Auger imbalance should not affect pto clutch - maybe the clutch needs adjustment. If it is a 2-stage clutch, some tractors have separate adjustment for pto and travel clutch. On others, one adjustment affects both, so adjusting for a worn travel clutch can leave the pto so it doesn't disengage.

  3. #3
    Platinum Member GaryE's Avatar
    Join Date
    Jan 2005
    Posts
    723
    Location
    Winterport, Maine
    Tractor
    L3710 GST

    Default Re: PTO won't cut-off

    I am not sure if your 3400HST has the PTO engagement mechanism as my 3710 GST. I had the same problem last spring. It turned out to be a stuck linkage arm.


    Here is a quick way to check. Follow the the cable from the PTO engagement lever to the arm that passes through the transmission housing. Make sure it is moving when you are moving the PTO lever. Mine was not. At first I thought it was the cable. It turned out it was the linkage was binding where it passes though the housing.


    I was able to free it by spraying LOTS of penetrating fluid on the shaft and having some one move the lever back and forth as I gently tapped the linkage with a hammer. It took several minutes but it finally released.


    By the sounds of it, you may be having the same problem......


    Hope this is of some help,


    Gary

  4. #4
    Gold Member daBear's Avatar
    Join Date
    Sep 2007
    Posts
    468
    Location
    Brandon, MS
    Tractor
    Kubota L2800

    Default Re: PTO won't cut-off

    There is a factory fix for this for L2800/3400's at least. My L2800 had this problem and the dealer explained the oem cable was stretching which cause the PTO to not disengage. I assume they replaced it with a non stretching cable.

  5. #5
    Gold Member
    Join Date
    Dec 2005
    Posts
    323
    Location
    BAR BOB Ranch, Needville Texas
    Tractor
    Kubota 3400HST

    Default Re: PTO won't cut-off

    Quote Originally Posted by rbargeron
    Some questions - what model tractor? 2-stage clutch? How many hours? Is the pto engagement mechanical or electric? Did the pto disengage ok before the vibration event? When the pto fails to stop, does it still drive with full power? Auger imbalance should not affect pto clutch - maybe the clutch needs adjustment. If it is a 2-stage clutch, some tractors have separate adjustment for pto and travel clutch. On others, one adjustment affects both, so adjusting for a worn travel clutch can leave the pto so it doesn't disengage.
    kubota 3400 HST, 120 Hrs, don't know if mech or elec. Prior to this prob. I always disengaged the Pto qithout clutching to prevent bad overing clutch sounds, always no prob. When pto disengaged and won't stop it is full power. Must stop engine and pto will be off on restart every time.

  6. #6
    Elite Member wushaw's Avatar
    Join Date
    Mar 2005
    Posts
    3,075
    Location
    Bristol Texas
    Tractor
    Kubota L2800, 15 hp 372 Mitsubishi

    Default Re: PTO won't cut-off

    It is mechanical cable operated PTO. Your cable is more than likely out of adjustment.

  7. #7
    Elite Member teg's Avatar
    Join Date
    Jul 2005
    Posts
    4,027
    Location
    Raleigh, NC Hillsville, VA
    Tractor
    L2800.

    Default Re: PTO won't cut-off

    ctpres, it WILL get worst... The crap from kutoba was to shoot oil on the cable... this has not worked for me. I got tired of turning off the engine to un-stick the pto and besides even that "trick" will quit working and the PTO will be "on" as you start the engine again.

    I will not recommend this but the only thing that works for *Me*... and to be used only as a last resort "work around"... is to push the clutch in, lock it in place, hop off the tractor and grab the augar and spin it back and forth until the cams "let go". Someone else in the safty form said I should turn the tractor off before doing this and I will try that the next time I use it.

    IF you have lots of holes to dig, it's a butt pain to get on and off the tractor that many times, so I ended up dragged it around while it was spinning.

  8. #8
    New Member
    Join Date
    Nov 2007
    Posts
    24
    Location
    Yorkville Indiana

    Default Re: PTO won't cut-off

    I was seriously looking at the L3400 kubota tractor but the PTO issues is really turning me off. Cams, cables, what else? Seems someone needs to go back to the drawing board and come up with a different design on this tractor.

  9. #9
    Gold Member
    Join Date
    Jun 2006
    Posts
    325
    Location
    Oklahoma
    Tractor
    2006 Kubota L2800 HST

    Default Re: PTO won't cut-off

    The L2800/3400 has PTO cable service advicory, NOT A RECALL. PSB-2007-027, it replaces the cable and install a new bracket to keep the cable from binding. If your tractor is in warranty it is covered,
    The original has a sharp angle for the cable to enter the sleeve, the new bracket changes the angle. It fixed my sticking cable.
    Marcussen
    Kubota L2800 HST
    Kubota LA463 FEL
    Woods GB60 Box blade
    Woods Brushbull BB60 (Rotary mower)
    535 hours

  10. #10
    Elite Member teg's Avatar
    Join Date
    Jul 2005
    Posts
    4,027
    Location
    Raleigh, NC Hillsville, VA
    Tractor
    L2800.

    Default Re: PTO won't cut-off

    It's not worth the $$$ in gas and the time to go do it... If kubota wishes to mail me the part... I'll send them the address. I have about 7 more months before it's out of warranty.

    How can not shutting off a PTO, NOT be a friggin' recall? I guess someone has to die??

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