Refilling the HP Q7551X (51X) toner cartridge is a high-yield solution for maintaining your HP LaserJet P3005 and M3035 series printers. By following this professional refill process, you can significantly reduce your printing costs while ensuring that output quality remains sharp and consistent. This guide walks you through the complete disassembly and cleaning procedure necessary for a successful refill.
Disassembly & Cleaning
- Spring Tension: Remove the two side tension springs carefully.
- Pin Extraction: Use a punch tool to drive the metal pins outward from the inside.
- Separation: Gently split the cartridge into two main components: the toner hopper and the waste bin.
- Waste Management: Completely empty the waste toner compartment to prevent background graying or streaks on the page.
Refill & Reassembly
- Hopper Access: Remove the side end-cap to reveal the fill port for the toner reservoir.
- Toner Loading: Pour the dedicated Q7551X toner powder into the hopper.
- Component Care: Clean the Primary Charge Roller (PCR) with a dry cloth and re-seat the OPC drum.
- Final Assembly: Re-align both sections of the cartridge and re-insert the hinge pins to lock it.
Tools
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If you are working with other high-capacity HP models, check our guide on refilling HP CE390A toner for similar professional techniques. For those maintaining Kyocera devices, we have a detailed walkthrough on how to recycle Kyocera DK-1150 drum units to extend your hardware life.
Professional Advice: Always apply a thin layer of starting powder (or toner) to the edge of the new cleaning blade before assembly. If the blade is installed “dry,” it may stick to the drum surface and flip or damage the new drum during the very first rotation.