How to Refill HP 952XL Ink Cartridges for the OfficeJet Pro 7740

Question:
I have an HP OfficeJet Pro 7740 printer and want to refill HP 952XL ink cartridges. I couldn't find any information about how to refill them on your site. What is the proper way to do this?

Answer:

For the HP 952XL cartridges used in the OfficeJet Pro 7740, direct refilling of the original HP cartridges is generally not feasible. These cartridges are equipped with sophisticated chips and a pressurized ink delivery system that make them difficult to refill reliably. Attempting to drill and refill the original cartridges often results in leaks, air bubbles, or the printer rejecting the cartridge due to chip errors.

The recommended solution is to use refillable cartridges designed specifically for the HP 952/952XL series. These are aftermarket cartridges that look similar to the originals but feature a refill port or plug that makes adding ink safe and manageable. Once you have these refillable cartridges, they typically come with instructions showing how to open the port, inject ink using a syringe, and properly reseal the cartridge.

Because BCH Technologies does not sell refillable cartridges for this model, your best option is to source them from third-party vendors such as eBay or AliExpress. When buying, make sure the listing clearly states that they are refillable cartridges for HP 952/952XL. Also check reviews or product Q&A to confirm compatibility with the OfficeJet Pro 7740.

A few tips when working with refillable cartridges:

• Always use high-quality ink formulated for HP pigment printers to avoid clogging.

• Fill slowly to prevent introducing air bubbles.

• Wipe off any residue before installing.

• Reset or compatible chips may be required to keep the printer recognizing the cartridge; many refillable versions already include auto-reset chips.

Addressing printer issues can be a complex and hands-on process, which is why we're unable to provide remote troubleshooting or individualized refill support. However, we do offer an in-person evaluation and repair service at our local diagnostic facility (https://bchtechnologies.com/printer-repair-service). Please note that we operate on a first-come, first-served basis, and it may take a few weeks before we can take in your printer. Our services cover either full printers or specific parts, but we recognize that our pricing may not always be the most economical. For many customers, self-help through online resources is the most practical option. You can begin by searching for tutorials on our YouTube channel (https://youtube.com/@bchtechnologies). Use the search icon next to "About" on the menu bar to look for "HP 952XL refill" or "OfficeJet Pro 7740 cartridges." YouTube's algorithm may also suggest useful videos from other channels that can guide you further.

Thanks again for your question and for your continued support of BCH Technologies. We appreciate your trust and are here to help you along your printer maintenance journey.