1. Introduction
This manual provides essential information for the proper installation and maintenance of your Cloudpower Replacement Filter Kit. This kit is designed to restore and maintain the filtration efficiency of your compatible Shark cordless vacuum cleaner, contributing to a cleaner home environment and optimal vacuum performance.

Image 1.1: Complete Cloudpower Replacement Filter Kit, including post filters, foam filters, felt filters, and a cleaning brush.
2. Package Contents
Verify that all components are present in your package:
- 2 x Post Filters
- 4 x Foam Filters
- 4 x Felt Filters
- 1 x Cleaning Brush

Image 2.1: An overview of the filter kit components, showing the post filters, foam filters, felt filters, and the cleaning brush.
3. Compatibility
This replacement filter kit is specifically designed for the following Shark Cordless Vacuum Cleaner models:
- Shark IZ400
- Shark IZ400UK
- Shark IZ400UKT
- Shark IZ420
- Shark IZ420UK
- Shark IZ420UKT
Ensure your vacuum cleaner model matches one of the listed models for proper fit and function.
4. Installation Instructions
Follow these steps to replace the filters in your Shark cordless vacuum cleaner:
- Power Off and Unplug: Before beginning, ensure your vacuum cleaner is turned off and unplugged from any charging source to prevent accidental operation.
- Locate Filter Compartments: Refer to your Shark vacuum's original user manual to identify the locations of the pre-motor (foam and felt) and post-motor filters. These are typically found near the dust cup and at the exhaust vent, respectively.
- Remove Old Filters: Carefully remove the existing foam, felt, and post filters. Dispose of them responsibly.
- Install New Foam and Felt Filters: Place the new foam filter first, followed by the felt filter, into the pre-motor filter housing. Ensure they are seated correctly.

Image 4.1: A close-up view of a foam filter, which is part of the pre-motor filtration system.
- Install New Post Filter: Insert the new post filter into its designated compartment. Ensure it clicks securely into place if applicable.

Image 4.2: A close-up view of a post filter, typically located at the exhaust of the vacuum.
- Reassemble Vacuum: Close all filter compartments and reassemble any parts of the vacuum that were removed during the process.
- Test Operation: Plug in and turn on your vacuum cleaner to ensure it operates correctly with the new filters installed.
5. Maintenance
Regular maintenance of your filters is crucial for maintaining optimal vacuum performance and air quality.
5.1. Filter Cleaning
The included cleaning brush can be used to remove dust and debris from your filters between replacements. Gently brush off accumulated dirt from the foam and felt filters. For the post filter, tap it over a waste bin to dislodge dust. Do not wash the post filter unless specified by your vacuum's original manual.

Image 5.1: The included cleaning brush, useful for removing debris from filters.
5.2. Replacement Frequency
For optimal vacuum performance and to maintain air quality, it is recommended to replace your filters every 3-6 months, depending on usage frequency and household dust levels. Regular replacement helps prevent reduced suction power and ensures efficient filtration.
6. Troubleshooting
If you experience issues after replacing your filters, consider the following:
- Reduced Suction: Ensure all filters are installed correctly and securely. Check for any blockages in the vacuum's hose or brush roll. If suction remains low, it may be time for a new set of filters if the current ones are heavily soiled or past their recommended lifespan.
- Unusual Noises: Verify that all filter compartments are properly closed and sealed. Loose components can cause rattling or whistling sounds.
- Dust Escaping: Confirm that the foam and felt filters are correctly layered and seated, and that the post filter is fully inserted. Improperly installed filters can allow dust to bypass the filtration system.
If problems persist, consult your Shark vacuum cleaner's original user manual or contact the vacuum manufacturer's support.
7. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 7.87 x 7.87 x 2.76 inches |
| Item Weight | 6.3 ounces |
| Manufacturer | Cloudpower |
| ASIN | B0F4XCXWCL |
| Item Model Number | K8X311C40GG2R1X09B9704 |