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Bobcat WB PTO problems

Discussion in 'Mechanic and Repair' started by LawnVet, Apr 17, 2008.

  1. LawnVet

    LawnVet LawnSite Member
    from SE MI
    Posts: 220

    Okay- maybe I'm missing something here. My PTO quit working while under heavy load and will not engage or even click. Here is what I've done and the results:

    1. Replaced fuse - nothing
    2. Replaced switch - nothing
    3. Replaced wiring - nothing
    4. Checked for voltage at the PTO - 30, dealer said it should be at least 11.
    5. Replaced the expensive (non-adjustable) clutch - nothing

    I am at a complete loss here. If the clutch is getting power it should work being that it is brand new. Please, someone help me see what I'm missing. I had to scrub my morning work due to this. It is the only machine that'll fit through small gates.
     
  2. LawnVet

    LawnVet LawnSite Member
    from SE MI
    Posts: 220

    Forgot to include model number - 933012, it's a belt drive - appx 5 years old
     
  3. themowerman

    themowerman LawnSite Senior Member
    from NJ
    Posts: 297

    Check your voltage regulator output and stator output and make sure you have good grounds. Since that unit does not use a battery system the voltage for the electric clutch comes from the voltage regulator.
     
  4. LawnVet

    LawnVet LawnSite Member
    from SE MI
    Posts: 220

    Thanks-
    30 AC in from stator
    6.5 DC from regulator
    is the regulator supposed to be putting out 14 or is the stator supposed to only bring in 14?
    I was told the clutch should be getting 11-14, I'm assuming DC voltage? That would leave me with a shortage instead of what I originally thought was an abundance, correct? I'm no electrician. I guess I'll have to check my ground, though everything seems to be in order there
     
  5. themowerman

    themowerman LawnSite Senior Member
    from NJ
    Posts: 297

    I don't have the Briggs specs handy but I do know that 6.5 volts DC is not enough to power that clutch. You may need a new voltage regulator.
     
  6. LawnVet

    LawnVet LawnSite Member
    from SE MI
    Posts: 220

    That's seems to be the concensus...this has gotten to be an expensive issue.

    Thanks a ton - I'll post the regulator results later.
     
  7. themowerman

    themowerman LawnSite Senior Member
    from NJ
    Posts: 297

    Take the other parts back. My take on your problem is the voltage regulator from what you are saying...................
     
  8. LawnVet

    LawnVet LawnSite Member
    from SE MI
    Posts: 220

    Wish I could - pto clutch is a non-refundable part. Suppose I should have tried the regulator first. If this doesn't work (no one, not even B&S has one in stock so it may be a few days) the only thing left is the alternator under the flywheel. Thanks again.
     
  9. LawnVet

    LawnVet LawnSite Member
    from SE MI
    Posts: 220

    FINALLY got the regulator from B&S. Took 2 seconds to replace and voila, I have my 36" back and can finish that last clean up. Thanks all!
     

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