Refilling Instructions for Black HP 303 & 303XL Cartridges

Black 303 & 303XL Refill Instructions

Please first read the following "Introduction to the Refill Tool"

introduction to the Refill Tool

We sell 3 different Refill Clips - But they all work the same way



Left - This tool appears in the slideshow instructions. The black attachment is fitted in the tool and the colour is in front.

Middle - This is the New Premium Upright Tool.  The black attachment is fitted in the tool and the colour is in front.

Right - This is the New Premium Flat Tool. The black attachment is fitted in the tool and the colour is in front.



This picture show you how the 3 tools work the same way in the stages when you need to fit the syringe to the tool. If you are unsure how the flat tool holds the cartridge please view this picture


To refill the HP Black 303 & 303XL cartridges you may also need, a cutter knife (Stanley Knife) if you are unsure where the refill hole is.

Remove the cartridge from your printer and place it on the table in front of you.

HP 303, 303XL removing the label

(If you know where the correct black fill hole is you don’t need to remove the label in the next stage and can go to the Priming Tool stage)

Otherwise carefully remove the label on the upper side of the cartridge with the cutter knife. The label can be reused after refilling.

Now the filler opening is visible. 

The Black refilling hole for the 303 & 303XL Cartridge is in the same place as the 302 pictured above

Now place the cartridge in the Priming Tool and take the large syringe (no needle) and insert it into the bottom of the Tool like the picture below. 


Now pull out the syringe plunger so that old ink comes from the print head. Do not use this old ink and dispose of carefully.

Refilling HP Black 303 & 303XL cartridges

The recommended amounts of ink when refilling black 303 cartridges is 5ml and for the 303XL cartridge 10ml of ink. Don’t overfill.

Put the needle onto the syringe. Draw the recommended amount of ink into the syringe.

Insert the filled syringe with the correct amount of ink into the cartridge refill hole. You will notice a slight resistance due to the sponge inside the chamber. Insert the needle no further than 3cm. Otherwise, you will stab into the filter screen and the ink will leak from the cartridge.

Now carefully & slowing fill in the ink. If ink leaks from the filler opening, draw a little back into the syringe. One colour chamber is now filled. Repeat the procedure with the two other chambers. Once you have filled all three chambers.

Now take the large syringe (no needle) and attach it to the base of the priming tool as shown below. Now pull out a small amount of ink. This action will bring the ink to the print head and help clean the nozzles.


Test to see you have refilled cartridge correctly

Now take the cartridge and dab it gently and hold down on to kitchen towel for a few seconds. If you have refilled the cartridge correctly you will see the 3 colours on the Kitchen Towel

All Filled and Remanufactured HP cartridges will not display ink levels and you should keep an eye on the print quality

When a refilled cartridge is reinstalled into the printer it is normal to receive error messages.  These might be 'Low on Ink', or 'Refilled Cartridge'.  You will need to skip this error by pressing 'OK' or 'Continue'.

Other error messages can be caused by ink or dirt on the electrical circuit contacts of the cartridge.  Carefully clean them with a damp towel.



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