Snow Blowers power-brush

Published on November 17th, 2016 | by Brandon

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How to Replace the Friction Disc on Your Ariens Power Brush

Ensure that your friction disc is in good condition and operating properly so that you’re able to fully operate your unit when the snow finally starts to come around. Follow the steps below to both remove and replace the friction disc on your Ariens power brush.

These instructions are specifically for the Ariens 921 series brushes. Always consult and be familiar with your owner’s manual for information specific to your unit. Take the proper safety precautions laid out in your manual when working on your equipment.

Separate the brush assembly and the frame before attempting to replace the friction disc.

  1. Turn the engine off.
  2. Disconnect the spark plug wire. Allow the unit to cool down completely.
  3. On a level surface, tip the frame over onto its front.
  4. Remove both of the wheels from the unit.
  5. Remove the six hex bolts that are securing the bottom cover of the unit. Remove the cover.
  6. Take the pivot pin out from the speed selector arm. Make sure you keep all removed hardware for reinstallation.
  7. Remove the spring clip pin that is closest to the drive sprocket from the hex shaft.
  8. Remove the left bearing flange from the frame.
  9. Slide the hex shaft leftward to remove the pinion sprocket and the friction disc assembly from the hex shaft.
  10. Take the friction disc assembly off of the frame.
  11. Remove the three screws that are holding the friction disc onto the carrier bearing.
  12. Remove the old friction disc.
  13. Replace the old friction disc with the new friction disc, cup side to carrier bearing.
  14. Reinstall the three screws that you removed in step 10 into the new friction disc and the carrier bearing. Torque to 5 –6 lbf-ft. (6.8 – 8.13 N•m).
  15. Insert the new friction disc assembly into the frame.
  16. Install the washers onto the carrier bearing and slide into speed selector arm.
  17. Insert the new hex shaft through the new friction plate assembly.
  18. Install the pinion sprocket onto the hex shaft and insert the shaft into the right bearing.
  19. Use the hardware that you removed in step 6 to install the left bearing.
  20. Reinstall the clip pin into the hex shaft.
  21. Connect the pivot pin to the speed selector arm.
  22. Reinstall the bottom cover and the screws that secure it.
  23. Reinstall the wheels onto the unit.
  24. Pull the unit back into its normal operating position.
  25. Reconnect the spark plug wire to the spark plug.
  26. Adjust traction drive clutch.
For information about safety, warranty, and your specific model, read and be familiar with your owner’s manual.

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