Electric PTO Clutch Troubleshooting :

Clutch not Engaging:

  1. Re-check the wiring as per the instructions. Verify that the clutch is receiving between 12-14 Volts DC at the clutch wire.
    1. If the clutch is not receiving 12-14 Volts DC at the clutch wire:
      1. Check your battery and charging circuit
        1. There should be 12-14 Volts at the battery terminals. If there is not, the battery is bad or the charging circuit is not charging the battery.
      2. Check the wiring harness from the battery to the clutch and replace or repair any damage as necessary
        1. Look for tears, frays and breaks in the wiring
        2. Check the PTO switch
        3. Check the key switch
        4. Check any in line fuses
      3. Verify that the second clutch wire is grounded
        1. If the original clutch has a single wire coming from your equipment
          1. Verify that the second clutch wire runs directly to ground at either the frame or the engine block
          2. Test continuity between the frame or engine block to the ground terminal on the battery
        2. If the original clutch has a two wire connection coming from your equipment
          1. Test continuity between the ground wire and the ground battery terminal
          2. Follow the wiring, looking for frays, breaks or tears
        3. If it is determined that the clutch is receiving 12-14 Volts DC at the clutch wire, has proper ground, and the wiring harness is undamaged, without fraying, breaking, or tearing replace the clutch with a new OX clutch.


Clutch Slipping


  1. Check electrical connections. See ‘Clutch not Engaging’
  2. Check the surface between the clutch armature, rotor and brake for contamination
    1. Clean surfaces thoroughly, and reassemble clutch
  3. Disconnect belt from clutch. Check driven system
    1. Check mowing deck for excess grass buildup, clean as needed
    2. Check driven system pulleys and bearings for wear
      1. Pulleys and bearings should rotate with little to no resistance when disconnected from drive belt
      2. Replace or repair as necessary


Clutch Vibrating / Making Noise


  1. Identify the location of the noise. Verify that the noise is coming from the clutch area
    1. Check anti-rotation device. Make sure device is secured tightly.  Some noise here is usual.  If noise is excessive replace anti rotation device
    2. Verify that the clutch bolt is torqued appropriately. Verify that the clutch has no movement on the crankshaft
    3. Verify that the clutch washer is not bent or warped. Replace if necessary
    4. Verify a gap between the clutch washer or D-spacer and the crankshaft. If no gap exists, please refer back to your installation instructions for proper installation.
    5. Verify that the clutch is rotating true and not wobbling. If the clutch is wobbling
      1. Inspect the clutch bearings for failure. If bearings have failed, replace with new Ox clutch
      2. Inspect the crankshaft for damage or bends. Replace or repair as necessary


If, after carefully and thoroughly following the instructions and working through this troubleshooting guide, you are unable to get your clutch to install or function properly please take it to a qualified mechanic for inspection and installation. 

If, after following the troubleshooting guide it is determined that your clutch needs to be replaced, please refer to the OX clutch website ( and follow the instructions for a warranty inspection (if within the warranty period,) or a lifetime exchange.