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New PTO Clutch still won't engage??

Discussion in 'Mechanic and Repair' started by Ethanmr, Aug 17, 2017.

  1. Ethanmr

    Ethanmr LawnSite Member
    Messages: 5

    I've been pulling out my hair all day about this and can't figure it out. Last week the blades on my Hustler super z with a 25 kawi started giving me problems engaging. Sometimes they would even cut off during a yard, but would normally turn right back on when I worked the switch. It started getting worse and didn't want to turn back on after I had been using them. Normally I could pull the switch a dozen or more times and get the pto to engage. That lasted a few days. Finally, they quit and wouldn't come back. I had been busy and don't have a close dealer but finally went out on Monday and picked up a switch. One of the reps said it was probably that or the pigtail. Well I went home and threw it on, and still nothing. Then I got smart and pulled out my meter and realized I had battery voltage to the clutch when I pulled the switch. So I figured it was the clutch. Resistance was like 1.8 ohms. So I ordered a new one and it got here today (Cheap Chinese something because I'm in the process of getting rid of this mower). Resistance on the new one was like 2.2. I put it on, and it still wouldn't engage. After working the switch several times, I got it to work like twice but then nothing. I'm getting a steady 14 volts to the clutch. The weird thing is, when I hooked the clutch to an extra battery while the mower was running and I got the blades to engage every time. I'm at a loss. Any help is appreciated. Mower model number 927871
  2. prezek

    prezek LawnSite Senior Member
    Messages: 299

    Replace the battery.
  3. Ethanmr

    Ethanmr LawnSite Member
    Messages: 5

    I'm not going to lie, I have no idea how old the battery is (Ive only had the mower for a year) but I'm getting 14.00 volts constant as soon as I pull the switch. Would a new battery give more amps or something? I'm not that knowledgeable about electricity.
  4. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 14,465

    Is the charging system working? DC volktage level shoud be 13.5 volts when engine running...
  5. Ethanmr

    Ethanmr LawnSite Member
    Messages: 5

    Well I believe that 14v reading I'm getting at the clutch is battery voltage and so yes, I'm assuming the charging system is working. Also, when I ran it off of an external battery, it probably was putting out about 12.5 volts and the blades still engaged without a problem.
  6. Breezmeister

    Breezmeister LawnSite Bronze Member
    Male, from South Jersey
    Messages: 1,786

    This might help you

    Attached Files:

  7. Ethanmr

    Ethanmr LawnSite Member
    Messages: 5

    Breez, thanks for that, just looked it over. I think everything checks out, although I'm going to give it another visual inspection in the morning. Also I'm not sure what model clutch I bought and there wasn't even one stamped on it, so I'm not sure what resistance i should be getting.
  8. dieselss

    dieselss LawnSite Silver Member
    Messages: 2,067

    Try a test light instead of a meter next time.
    Check for positive and ground.
  9. Gerry's Green Landscaping

    Gerry's Green Landscaping LawnSite Member
    Messages: 1

    I have a 36" Bob Cat walk behind mower. I was at a house mowing then I turn off the blades to dump the clippings in the trash went back to engage them and they would not turn on. I tried wiggling the cables and nothing. Does any one have an idea whathat it can be? BTW I checked the PTO Switch with a multimeter and there is power going to it. I replace the pto clutch 2 years ago, but I just started this business and I only use the mower no more then 6 times a month. Can anyone guide me. Thanks
  10. Dirtscooter5

    Dirtscooter5 LawnSite Member
    Messages: 123

    Check your ground also and clean up all connection points, I believe I had a similar problem and it ended up being a bad ground

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