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Follow this guide to replace the centrifugal clutch on a 2017 Toro Stump Grinder model 22615HD.

  1. Before you begin, ensure the machine is powered down and cool to the touch. Turn the ignition switch to the off position.
    • Before you begin, ensure the machine is powered down and cool to the touch.

    • Turn the ignition switch to the off position.

  2. Flip the fuel cutoff valve switch into the off position. Flip the fuel cutoff valve switch into the off position.
    • Flip the fuel cutoff valve switch into the off position.

  3. Grab the plastic housing at the end of the spark plug wire. Pull firmly to disconnect the wire from the spark plug.
    • Grab the plastic housing at the end of the spark plug wire.

    • Pull firmly to disconnect the wire from the spark plug.

  4. Tilt the machine so that it is resting on the handle with the cutter wheel raised.
    • Tilt the machine so that it is resting on the handle with the cutter wheel raised.

  5. Use a 14 mm socket to remove the fasteners securing the belt guard: One 14 mm bolt
    • Use a 14 mm socket to remove the fasteners securing the belt guard:

    • One 14 mm bolt

    • One 14 mm nut

  6. Remove the belt guard. Remove the belt guard. Remove the belt guard.
    • Remove the belt guard.

  7. Use a 9/16 inch socket to loosen the four nuts securing the bottom of the motor enough to allow the motor to slide freely. Do not remove the nuts. Use a 1/2 inch wrench in combination with the socket wrench to hold the bolts in place. Use a 1/2 inch wrench in combination with the socket wrench to hold the bolts in place.
    • Use a 9/16 inch socket to loosen the four nuts securing the bottom of the motor enough to allow the motor to slide freely. Do not remove the nuts.

    • Use a 1/2 inch wrench in combination with the socket wrench to hold the bolts in place.

  8. Use a 1/2 inch wrench to loosen the two bolts behind the centrifugal clutch enough to allow the motor to slide freely. Do not remove the bolts.
    • Use a 1/2 inch wrench to loosen the two bolts behind the centrifugal clutch enough to allow the motor to slide freely. Do not remove the bolts.

  9. Wrap a piece of tape around the upper half of the tensioner bolt to mark the location of the second nut. Use a 9/16 inch wrench to loosen the nut on the lower half of the tensioner bolt until the motor can slide forward as much as possible.
    • Wrap a piece of tape around the upper half of the tensioner bolt to mark the location of the second nut.

    • Use a 9/16 inch wrench to loosen the nut on the lower half of the tensioner bolt until the motor can slide forward as much as possible.

    • During reassembly, reference the tape to position the outer nut into the same location as before to ensure proper belt tension.

  10. Slide the engine towards the cutter blade to loosen the drive belt. Slide the engine towards the cutter blade to loosen the drive belt.
    • Slide the engine towards the cutter blade to loosen the drive belt.

  11. Lift the drive belt up and away from the machine while rolling it towards the cutter head to gradually roll it off of the pulley. Lift the drive belt up and away from the machine while rolling it towards the cutter head to gradually roll it off of the pulley. Lift the drive belt up and away from the machine while rolling it towards the cutter head to gradually roll it off of the pulley.
    • Lift the drive belt up and away from the machine while rolling it towards the cutter head to gradually roll it off of the pulley.

  12. Remove the drive belt.
    • Remove the drive belt.

  13. Use an impact wrench with a 9/16 inch socket to remove the bolt and washer securing the centrifugal clutch to the spindle.
    • Use an impact wrench with a 9/16 inch socket to remove the bolt and washer securing the centrifugal clutch to the spindle.

  14. Use a jaw puller to extract the centrifugal clutch from the spindle:
    • Use a jaw puller to extract the centrifugal clutch from the spindle:

    • Place the center screw so that it is in line with the center of the spindle.

    • Hook the jaws around the back edge of the clutch assembly.

    • Tighten the center screw until the centrifugal clutch is removed from the spindle.

  15. Remove the centrifugal clutch and shaft key from the spindle.
    • Remove the centrifugal clutch and shaft key from the spindle.

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To reassemble your device, follow these instructions in reverse order.

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Sam Omiotek

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