Refilling the Canon 737 (CRG-737) toner cartridge is one of the best ways to save on printing costs for your Canon MF232W. However, you must know that Canon uses different names for this exact same cartridge depending on your region. In Europe, it is the 737, while North American users know it as the 137, and in Asia, it is called the 337.
In this guide, we will demonstrate the correct refill procedure. Furthermore, this method also applies to the HP 83A (CF283A) cartridge, as they share the same internal design.
Step-by-Step Refill and Cleaning
- Opening the Cartridge: First, you need to remove the side spring and the side screws to separate the two halves of the cartridge.
- Cleaning the Waste Toner: Subsequently, you must empty the waste bin. Because this is a compact cartridge, a full waste bin will quickly cause grey backgrounds or streaks on your prints.
- Refilling the Hopper: Carefully open the refill cap (or remove the developer roller if there is no cap) and pour in the specialized monochrome toner powder. Moreover, ensure you do not damage the delicate magnetic roller during this process.
- Cleaning the Doctor Blade: Additionally, use a dry cloth to clean the doctor blade. This ensures a consistent layer of toner is applied to the roller, which is vital for sharp text.
- Reassembly and Chip: Finally, put the two halves back together and ensure the springs are correctly attached. While these printers often continue to print with the old chip, we recommend replacing it to have an accurate toner level reading.
Recommended Supplies (Select Your Regional Model)
For the best results, always use high-quality toner powder and parts compatible with your specific model:
- Replacement Cartridge (Europe): Canon 737 (CRG-737) High Yield — For European MF series printers.
- Replacement Cartridge (USA/Canada): Canon 137 (CRG-137) High Yield — For North American ImageCLASS printers.
- Replacement Cartridge (HP Equivalent): HP 83A (CF283A) Black Toner — The HP version of this cartridge.
- Maintenance Tool: Magnetic Screwdriver & Toner Vacuum — Essential for a clean and safe refill process.
Expert Tip
If you notice light prints after the refill, the magnetic roller might be worn out or covered in paper dust. Consequently, cleaning the roller with a specialized solution can often restore the print density to its original level.
Need more printer tips? Read our guides on Xerox Phaser 3020 Refills or Fixing Brother TN2220/TN450 Reset Issues.
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