Introduction
This manual provides detailed instructions for the installation, maintenance, and troubleshooting of replacement parts for your Xiaomi Robot Vacuum X20 Max and D109GL models. Regularly replacing these components ensures your robot vacuum operates at peak efficiency, maintaining a clean home environment.

Setup and Installation
Before installing any new parts, ensure your robot vacuum is powered off and disconnected from its charging base. Refer to your robot vacuum's main user manual for specific instructions on accessing component compartments.
1. Main Roller Brush Installation

- Flip the robot vacuum over.
- Locate the brush guard cover, usually secured by clips or screws. Open or remove it.
- Remove the old main roller brush.
- Insert the new main roller brush, ensuring the ends align correctly with the slots in the vacuum.
- Close or re-attach the brush guard cover.
2. Side Brush Installation

- Flip the robot vacuum over.
- Locate the side brush(es). They are typically held by a single screw.
- Unscrew and remove the old side brush.
- Place the new side brush into position and secure it with the screw.
3. HEPA Filter Installation

- Open the top cover of the robot vacuum to access the dust bin.
- Remove the dust bin.
- Locate the filter compartment within the dust bin.
- Remove the old filter and insert the new HEPA filter, ensuring it sits flush.
- Reinstall the dust bin and close the top cover.
4. Mop Cloth Installation

- Locate the water tank or mopping module on your robot vacuum.
- Remove the old mop cloth, typically attached with Velcro or a sliding mechanism.
- Attach the new mop cloth securely to the water tank/mopping module.
- Ensure the cloth is evenly spread and properly aligned.
5. Dust Bag Installation

- Open the lid of your robot vacuum's auto-empty station.
- Carefully remove the full dust bag from its slot.
- Insert a new dust bag into the slot, ensuring it is fully seated and the opening aligns with the station's suction port.
- Close the lid of the auto-empty station.
Operating with New Parts
Once all replacement parts are installed, power on your robot vacuum. The new components will integrate seamlessly into the cleaning process. The main roller brush and side brushes will effectively agitate and sweep debris, the HEPA filter will capture fine particles, the mop cloth will provide wet cleaning, and the dust bag will collect debris from the auto-empty station.
For optimal performance, ensure the mop cloth is dampened before mopping cycles and that the dust bag is correctly installed in the auto-empty station.
Maintenance
Regular maintenance of these parts is crucial for extending their lifespan and ensuring efficient cleaning.
- Main Roller Brush: Check weekly for tangled hair or debris. Use the cleaning tool (if provided with your vacuum) to cut and remove hair. Replace every 6-12 months, or sooner if visibly worn.
- Side Brushes: Inspect weekly for bent or damaged bristles. Clean off any tangled hair. Replace every 3-6 months, or if bristles are splayed or broken.
- HEPA Filters: Tap gently to remove dust after each few uses. Do not wash. Replace every 3-6 months, or if suction power noticeably decreases.
- Mop Cloths: Wash after each mopping cycle. Hand washing is recommended to preserve material integrity. Replace every 1-3 months, or if cleaning performance diminishes.
- Dust Bags: Replace when full. Your robot vacuum or auto-empty station will typically notify you when replacement is needed.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Reduced cleaning performance | Worn main/side brushes, clogged filter, dirty mop cloth. | Clean or replace main/side brushes. Clean or replace HEPA filter. Wash or replace mop cloth. |
| Vacuum making unusual noises | Debris tangled in main brush or side brushes. | Remove and clean main roller brush and side brushes thoroughly. |
| Mop function ineffective | Mop cloth dirty or not properly attached. | Wash the mop cloth. Ensure it is securely attached to the mopping module. |
| Dust bin fills quickly / auto-empty fails | Dust bag full or improperly installed. | Replace the dust bag. Ensure it is correctly seated in the auto-empty station. |
Specifications
| Component | Approximate Dimensions | Approximate Weight |
|---|---|---|
| Main Roller Brush | Standard size for Xiaomi X20 Max / D109GL | Not specified (varies) |
| Side Brush | Standard size for Xiaomi X20 Max / D109GL | 4.7g |
| HEPA Filter | 40mm width | Not specified (varies) |
| Mop Cloth | 135mm diameter | 13g |
| Dust Bag | 19cm (H) x 13cm (W) x 11cm (D) | Not specified (varies) |
Note: Dimensions and weights are approximate and may vary slightly between batches.
User Tips
- For households with pets, consider more frequent cleaning of main and side brushes to prevent hair entanglement.
- Keep spare filters and mop cloths on hand to ensure continuous optimal cleaning performance.
- Always ensure the robot vacuum is turned off before attempting to replace or clean any parts.
- If you notice a decrease in suction or cleaning quality, check the filter and brushes first.
Warranty and Support
These replacement parts are designed for compatibility with Xiaomi Robot Vacuum X20 Max and D109GL models. For any issues related to the quality or fit of these replacement parts, please contact the seller directly through your purchase platform for assistance.
For support regarding your Xiaomi Robot Vacuum itself, please refer to the official Xiaomi documentation or customer service channels.





