KitchenAid Stand Mixer Rear Sleeve Bearing Replacement Guide

The rear sleeve bearing in a KitchenAid stand mixer is inside the transmission housing. It connects to the worm gear, helping to reduce friction and keep the mixer running smoothly. Over time, wear and tear can cause the bearing to degrade, leading to excessive noise, motor strain, or even a mixer that stops working entirely.

Replacing the bearing yourself can save both time and money. With the right tools and a step-by-step approach, the repair is manageable.

Common Signs of a Worn Rear Sleeve Bearing

If you’re unsure whether the rear sleeve bearing needs replacement, look for these signs:

• Unusual noises: Grinding, rattling, or loud humming sounds can indicate excessive wear.
• Sluggish performance: The mixer may struggle to maintain speed or slow down unexpectedly.
• Overheating: A faulty bearing can cause the motor to overheat, leading to potential damage.
• Excessive vibration: The mixer may shake more than usual while running.
• Gear misalignment: The attachment hub or beaters may not move smoothly or stay aligned.

Tools You’ll Need

• Phillips screwdriver
• Flat-head screwdriver
• New rear sleeve bearing (Make sure it’s compatible with your mixer model before installation)

Checking Part Compatibility

Before replacing the bearing, confirm that the new part matches your specific mixer model. You can find the model number in one of these locations:

• Under the base of the mixer
• On the back of the motor housing
• On the side of the base

Look for a sticker or metal plate that includes “MOD” or “Model” before the number. Write it down or take a picture for reference.

Safety Tips

When working on any appliance, safety should come first. Follow these precautions:

• Unplug the mixer or switch off the circuit breaker before starting any repairs.
• Let the mixer cool down if it was recently used.
• Work in a well-lit area for clear visibility.
• Keep your workspace clear and free of distractions like children or pets.
• Make sure your hands are dry when handling electrical components.
• Check the user manual for any model-specific instructions.
• Use gentle pressure when handling parts to avoid damage.
• Wear insulated gloves to protect against sharp edges and debris.
• Avoid direct contact with wires to prevent electrical shock. Use non-conductive tools if necessary.

How to Replace the Rear Sleeve Bearing in a KitchenAid Stand Mixer

Here are the steps to remove the old rear sleeve bearing and install a new one in your KitchenAid stand mixer.

Removing the Old Rear Sleeve Bearing

1. Unplug the mixer from the power outlet.
2. Lift the beater and turn it clockwise to release it, then pull it out.
3. Lift the bowl off the mounting pegs and remove it.
4. Use a Phillips screwdriver to remove the screw securing the trim at the back.
5. Lift the trim and set it aside.
6. Use a Phillips screwdriver to remove the four screws securing the cover, two on each side.
7. Lift the cover off and set it aside.
8. Use a Phillips screwdriver to remove the two screws holding the speed control board.
9. Lift the speed control board and set it aside.
10. Use a small flat-head screwdriver to release the tabs securing the sensor.
11. Press on each side of the tabs to release them.
12. Pull the sensor out of the motor.
13. Swing the speed control board out of the way.
14. Use a Phillips screwdriver to remove the four screws securing the transmission cover.
15. Lift the transmission housing off.
16. Lift the worm gear and pull the old rear sleeve bearing off the shaft.
17. Set the worm gear aside.
18. Remove the rear sleeve bearing from the mixer.

Installing the New Rear Sleeve Bearing

19. Place the new rear sleeve bearing so that the side with the shorter flange is facing the gear.
20. Lift the worm gear and slide it onto the shaft.
21. Position the flat sides on each side of the shaft vertically.
22. Position the housing back on and align it.
23. Flip the mixer over and push the cover down into place.
24. If the cover does not fully seat, turn the hub attachment until it aligns with the beveled gear.
25. Use a Phillips screwdriver to secure the screws holding the housing in place.

Reassembling the Mixer

26. Plug the sensor back into the speed control board and clip it into the motor.
27. Rotate the speed control board over and align it with the screw holes.
28. Use a Phillips screwdriver to secure the screws.
29. Align the cover and set it down on the mixer.
30. Use a Phillips screwdriver to secure the four screws.
31. Place the trim ring back on and secure the screw at the back.
32. Line up the pins on each side of the bowl and push down on the back to snap it into place.
33. Align the beater on the shaft, making sure the pin fits into the cutout.
34. Turn the beater counterclockwise to lock it in place.
35. Plug the mixer back in and test it to confirm it operates correctly.

Also Read: Stand Mixer Repair: Common Malfunctions and Fixes

Tips for Extending the Life of Your Mixer

Regular maintenance can help avoid premature wear and prolong the mixer’s lifespan:

• Lubricate moving parts: Use food-safe grease on gears and bearings to reduce friction.
• Avoid overloading: Mixing heavy dough or batter beyond the mixer’s capacity can strain internal parts.
• Store it properly: Keep the mixer in a dry, dust-free environment to prevent debris buildup.
• Clean after each use: Wipe down the housing and attachments to prevent residue from hardening inside.
• Check for loose parts: Periodically inspect screws and fasteners to prevent misalignment.
• Let it rest: Running the mixer continuously for long periods can lead to overheating and faster wear.

When to Seek Professional Repair

Although replacing the rear sleeve bearing is manageable for many users, some cases may require professional service:

• Severe motor issues: If the mixer stops running or frequently overheats, the problem may go beyond the bearing.
• Electrical concerns: Sparks, burning smells, or unresponsive controls may indicate wiring or motor damage.
• Internal damage: If you notice broken gears, stripped screws, or extensive wear inside the transmission housing, a technician may be needed.
• Difficulty disassembling the mixer: Some models have complex designs that make accessing internal components more challenging.

If you’re not confident in making the repair or the issue seems more serious, professional service can help prevent further damage.

Key Takeaways

A worn-out rear sleeve bearing might start with a little noise, but if ignored, it can completely stop your KitchenAid mixer from working. The good news? You don’t need to be an expert to fix it. With basic tools, patience, and careful steps, you can get the job done.

If you let the issue go, other parts may wear down, turning a simple fix into a much bigger problem. But handling it now saves you time and money in the long run. Instead of replacing your mixer or paying for repairs, take a closer look. A little effort today can keep your machine running smoothly for years.