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PTO Problem

Discussion in 'Mechanic and Repair' started by garyslawn, May 17, 2020.

  1. garyslawn

    garyslawn LawnSite Member
    from NE Ohio
    Messages: 191

    Bobcat 52inch Kaw 19HP blades come on then stop 30 seconds later, I stop engine , start again pull PTO switch blades come on then stop immediately. I replaced Ignition switch and PTO switch. Any ideas appreciated.
  2. BigFish

    BigFish LawnSite Fanatic
    Messages: 5,910

    Could be one of the safeties, or mayhaps the interlock module if it has one.
    Check fer voltage at the clutch hot wire when the clutch dies.
    AlohaMowing and Breezmeister like this.
  3. Jeff in AL

    Jeff in AL LawnSite Senior Member
    from Alabama
    Messages: 810

    Most likely a wire broke in the clutch harness jumper and is now making intermittent contact.
    An easy way to check the jumper is to turn the key to "On" (not running, parking brake on and both sticks fully open), then engage the PTO switch. Now get under the back of the machine and wiggle the wires directly at the clutch connector and at the opposite end of the jumper where it connects to the main harness. If you hear the clutch lock up/drop out, then you know your issue lies there.
    Sometimes however, you have to do it the old fashioned way as mentioned and check for voltage. To do that, unplug the jumper harness from the main harness under unit and check for battery voltage on main harness with PTO engaged as described above.
    If you have constant voltage, recheck your jumper/replace it. If you don't have constant voltage then we'll need to dig deeper!

    Assuming it is the harness jumper, the Part Number is 2720949.

    If you do replace the jumper, make sure to zip-tie it back to the clutch bracket with a loop to prevent vibration from prematurely breaking the wire(s) again and keep it held up from getting snagged on something!
    Breezmeister and BigFish like this.

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