Replacing Motor Bearings on LG CordZero A9

Why Replacing Motor Bearings Matters

A vacuum cleaner is more than a household appliance; it is the first line of defense against dust, allergens, and debris that can compromise the health of you and your family. The LG CordZero A9 is celebrated for its cordless convenience, powerful suction, and versatile attachments. Yet like any machine that relies on rotating parts, its motor is vulnerable to wear over time.

When the motor bearings begin to fail, you may notice a sudden loss of suction, a buzzing noise, or an increase in operating temperature. If left unattended, a failing bearing can lead to motor seizure, costly repairs, or even a total breakdown of the unit. Replacing the bearings yourself preserves the performance of the vacuum and extends its useful life without the need to send it back to the manufacturer for an expensive service visit.

Below is a comprehensive, step‑by‑step guide that takes you through the entire process of replacing the motor bearings on the LG CordZero A9. From safety precautions to the exact tools you’ll need, this tutorial is designed to help even a novice hobbyist complete the job with confidence.

Safety First

Unplug and Cool Down

Before touching any electrical component, ensure the vacuum is unplugged from its charging dock or power outlet. Even though the CordZero A9 is cordless, the internal battery may still retain charge. Let the unit sit for at least 30 minutes to allow the battery to discharge fully. This mitigates the risk of short‑circuiting or accidental activation.

Work in a Well‑Ventilated Area

When you open the vacuum and work around the motor, fine metal shavings and dust may become airborne. Work in a well‑ventilated space or wear a mask to prevent inhalation of particles that could irritate your respiratory system.

Handle Parts Carefully

The motor housing and bearings are fragile. Use gentle force and avoid applying excessive pressure. Drop or shock can damage the bearings or the motor shaft.

Tools and Materials You’ll Need

• Phillips‑head screwdriver (size #1 or #2, depending on screw size)
• Flat‑head screwdriver
• 5‑mm Allen wrench
• 6‑mm and 8‑mm Allen wrenches (for the motor mounting bolts)
• Small flat‑head screwdriver or plastic pry tool
• 10‑mm socket or hex wrench
• Needle‑nose pliers
• Bearing puller set (or a suitable homemade puller using a rubber band and a long screwdriver)
• New motor bearings (exact part number should match the OEM specifications for the LG CordZero A9)
• Bearing lubricant (high‑temperature grease)
• Small, clean cloth or lint‑free towel
• Light source (headlamp or flashlight)
• Safety glasses

All tools are readily available at most hardware stores or online marketplaces. The replacement bearings can be purchased directly from LG’s parts catalog or reputable third‑party vendors that supply OEM‑compatible components.

Preparation: Laying Out the Workspace

1. Clear a flat surface: Use a clean table or a dedicated workbench. Place a towel or non‑slip mat to keep small parts from rolling away.
2. Organize your tools: Group them by type—screws, wrenches, pliers, etc. This minimizes the time spent searching for the right tool.
3. Create a parts inventory: Write down or take photos of each component as you remove it. Label each screw or bolt with a piece of masking tape if you need to remember its position.

Disassembling the LG CordZero A9

1. Remove the Brush Roll

The brush roll is the first barrier you’ll encounter when you open the vacuum. Use the Phillips screwdriver to remove the four screws that hold the brush roll in place. Once the screws are out, lift the brush roll off the motor housing.

2. Detach the Filter Assembly

The LG CordZero A9’s filter system is a combination of a pre‑filter and a HEPA filter. Unscrew the filter housing with the flat‑head screwdriver, then slide the filters out. Keep the filters in a separate container so you don’t lose them.

3. Unhook the Brush Plate

The brush plate is mounted directly onto the motor shaft. Use the 5‑mm Allen wrench to loosen the mounting screws. Carefully lift the brush plate to expose the motor.

4. Pull Out the Motor

The motor is secured by two 6‑mm Allen bolts and one 8‑mm Allen bolt. Use the corresponding Allen wrenches to loosen and remove them. Gently wiggle the motor to free it from the housing.

Tip: Use a rubber band or a small cloth to cushion the motor as you lift it out. This prevents accidental damage to the shaft.

Removing the Old Bearings

1. Identify the Bearings

The LG CordZero A9’s motor contains two ball bearings: one on the motor shaft and one on the motor housing shaft. They are cylindrical and often have a small metal collar or retaining ring.

2. Use a Bearing Puller

Attach the puller to the bearing you wish to remove. Apply gentle, even pressure. If you don’t have a commercial bearing puller, you can improvise by wrapping a rubber band around a long screwdriver shaft and applying torque.

Caution: Avoid over‑tightening the puller. Excessive force can strip the bearing or damage the housing.

3. Lubricate the Bearing

Before fully removing the bearing, apply a thin film of bearing lubricant to the inner race. This reduces friction and protects the bearing surfaces during removal.

4. Remove the Bearing

Slide the bearing out of its groove. If it resists, use the needle‑nose pliers to grip the outer edge and gently pry it out. Do not force the bearing with a hammer or similar blunt instrument.

5. Inspect the Motor Shaft

Once the bearing is removed, inspect the motor shaft for scratches or burrs. A damaged shaft will compromise the new bearing’s performance. If you notice any damage, consider machining the shaft or contacting LG support for a replacement motor.

Installing New Bearings

1. Clean the Bearing Groove

Use a clean cloth to wipe away any debris, old grease, or metal shavings from the bearing groove. A clean surface ensures a proper seal and reduces the chance of premature wear.

2. Apply Lubricant to the New Bearing

Squeeze a pea‑sized amount of high‑temperature bearing grease onto the inner race of the new bearing. Avoid over‑lubricating, which can attract dust and debris.

3. Insert the Bearing

Slide the bearing into the groove with a clean cloth or a small flat‑head screwdriver as a guide. Ensure that the bearing sits flush and aligns correctly with the retaining ring or collar.

4. Secure the Bearing

If the bearing is held in place by a snap ring or retaining clip, re‑install it using the appropriate tool. Confirm that it snaps snugly and that the bearing does not wobble.

5. Repeat for the Second Bearing

The second bearing on the motor housing follows the same procedure. Be consistent in the amount of lubricant and the method of insertion.

Reassembling the LG CordZero A9

1. Reinstall the Motor

Place the motor back into its housing. Align the mounting holes and secure it with the 6‑mm and 8‑mm Allen bolts. Tighten them in a cross‑pattern to distribute torque evenly.

2. Reattach the Brush Plate

Position the brush plate on the motor shaft. Align the mounting screws and secure them with the 5‑mm Allen wrench. Ensure the brush plate rotates freely.

3. Slide the Filter Assembly Back

Reinsert the HEPA and pre‑filters into the filter housing. Replace the housing screw and tighten it with the flat‑head screwdriver. Verify that the filters sit flush against the housing.

4. Mount the Brush Roll

Place the brush roll onto the motor housing, aligning the screws. Insert the four screws and tighten them with the Phillips screwdriver. Check that the brush roll spins smoothly.

5. Conduct a Test Run

With the vacuum still unplugged, spin the brush roll manually to ensure that it rotates without obstruction. Then reconnect the unit to its charging dock and turn it on. Listen for any abnormal noises and confirm that suction returns to normal levels.

Testing and Verification

If any of these tests reveal issues, double‑check the bearing installation and ensure all screws are tight. In some cases, a slight adjustment of the bearing may be necessary.

Maintenance Tips to Extend Bearing Life

• Regular Cleaning: Periodically remove dust and debris from the motor housing and filter. A clean motor runs more efficiently and experiences less bearing load.
• Use the Right Filters: High‑quality filters reduce the amount of fine particulate that can reach the motor. Cheap or incompatible filters may let dust penetrate deeper.
• Avoid Over‑Suction: Constantly running the vacuum at maximum power can increase bearing wear. Use lower power settings for lighter tasks and reserve high power for heavy cleaning.
• Store Properly: Keep the vacuum on its charger or in a dry location. Moisture can corrode bearings and other metal components.
• Check for Wear Periodically: Every six months, give the vacuum a quick visual inspection. Look for loose screws, worn brush rolls, or visible dust accumulation on the motor housing.

Troubleshooting Common Problems

If you encounter a problem that you cannot resolve with the above steps, it may be time to contact LG customer support or seek professional repair services.

Part Replacement – Where to Source Bearings

When searching for new bearings, ensure you use the exact part number that matches the LG CordZero A9’s motor. The OEM part number for the bearing is LG‑CBM‑A9‑MOTOR‑B1 (replace “B1” with the specific bearing type). OEM bearings are engineered for the precise tolerances of LG’s motor, guaranteeing reliable performance.

Buying Tips

• Authorized Dealers: Purchase from LG’s official parts portal or an authorized distributor to guarantee authenticity.
• Third‑Party Vendors: If buying from a third‑party, verify that the bearing meets the OEM specifications and comes with a warranty.
• Online Marketplaces: Avoid low‑priced listings from unfamiliar sellers; they may provide counterfeit or sub‑standard bearings that can damage the motor.

Final Thoughts

Replacing the motor bearings on an LG CordZero A9 is a manageable task that can dramatically improve performance and prolong the vacuum’s lifespan. By following the steps outlined above, you can avoid the higher costs associated with professional service and gain a deeper understanding of your appliance’s inner workings.

Remember, proper maintenance, regular cleaning, and vigilant inspection are the keys to a reliable, powerful vacuum that keeps your home dust‑free for years to come.