1. The Air pressure within the 51626A, 51629A/ 51629G & C6614D cartridges is regulated by an aerator (Aperture C) that must be sealed to prevent leakage during refilling. Use strong adhesive tape to completely seal this aperture.
2. The cartridge is sealed by a plastic ball in Aperture B on the top of the cartridge.  This ball must be
removed by pushing it into the cartridge using a ballpoint pen or other pointed tool.  Be sure that you
are working over a sink when the ball is pushed into the cartridge ~ just in case!!

Newer versions of this cartridge do not have this opening so a small hole approximately 3mm must be carefully made in the same position shown with the screw provided.  

IMPORTANT - DO NOT PIERCE APERTURE A
3. The cartridge should now be rested in an upright position over the sink. Inject up to 20ml of ink into the top corner hole (Aperture B).  You must seal the top corner hole air tight. We suggest using the screw supplied or strong glue. Which ever you decide to use, you should squeeze the cartridge just before sealing to set up the vacuum.
4. Have a pad of paper towels near by to place the cartridge on while the cartridge is being squeezed. This is to absorb any ink that might be forced out.
5. Remove the tape over aperture C, and blot with the tissue if necessary.
6. Set on a paper towel for an hour as a drip precaution. Expect a few drips until the vacuum stabilizes
7. Replace the cartridge and run 1 - 3 cleaning cycles as per printer instructions.
8. If necessary leave cartridge in printer for up to 24 hours. (Allows ink to flow to the print head).

IMPORTANT - for best results, cartridge should be refilled whilst some ink remains
Empty cartridges should be refilled immediately.
This work is best done over the sink.

51625A, 51649A & C1816A
 

1. On the 51625A, 51649A (51649G) & C1816A the filler holes are located under the green or blue top. The green or blue top must be removed before refilling by carefully prying it off with a thin flat metal blade, such as a bread knife or penknife. Alternatively lay the cartridge on its side, hold down firmly, and strike the green top with a blunt instrument to break its seal being careful not to damage the circuits on the rear of the cartridge. This process can be tricky but once you master it you will find the next one easy.
2. Insert the filling needle into the filler hole of the colour to be refilled, and push downwards until the filling needle reaches the centre of the cartridge. Note: The cartridge contains a sponge and a slight resistance may be felt. Important:  When you take off the colour cartridge cap will notice that the sponge is white.  Do not change the sponge colour.  Fill the individual colours until the colour just
begins to show in the white sponge.
3. Slowly inject up to 7ml. of ink until the sponge is saturated.
4. After refilling the top can be refitted and secured with adhesive tape.
5. Set above a paper towel for an hour as a drip precaution. Expect a few drips. Do not allow the paper towel to touch the bottom of the cartridge, as it will draw out all of the ink. Remove any large hanging drops immediately.
6. Replace the cartridge and run 1 - 3 cleaning cycles as per printer instructions. If necessary leave cartridge in the printer for up to 24 hours. (Allows ink to flow to the print head).

IMPORTANT - for best results, cartridge should be refilled whilst some ink remains. Empty cartridges should be refilled immediately.
This work is best done over the sink.

51645A/ G & C6615D/ A

1. Turn the cartridge upside down. Carefully using a penknife or similar take off the black plastic film
and push in the ball bearing that seals the filling hole with a ballpoint pen.
2. Slowly inject up to 20-25ml. of the correct colour ink (cyan, magenta or yellow) into the filling hole.
3. Seal the filling hole by squeezing the cartridge sides (this will create a vacuum when let go) and in-
serting the plug seal provided into the hole. This seal must be airtight, if it is not, use some additional
tape to ensure an airtight seal or the cartridge will not work. Some ink will leak from the print head.
4. Place the cartridge print head down on absorbent paper for 2 minutes to draw out any excess ink
and equalize pressure in the ink chamber.
5. Fill each colour required & then place the cartridge(s) back into the printer and run a priming cycle
per printer instructions or print a couple of test pages.

IMPORTANT - for best results, cartridge should be refilled whilst some ink remains. Empty cartridges should be refilled immediately.
This work is best done over the sink.

51641A, C1823A/ D ,C6578D/ A, C6625A/ D

1. The filling holes are located on the top of the cartridge and are sealed with small plastic plugs.
These must be removed by pushing them into the cartridge with a ballpoint pen.
2. Seal two of the filling holes with tape whilst filling one, this will prevent cross contamination of ink
colours.
3. Insert the correct colour filling bottle into the filler hole of the colour to be refilled (see diagram) and
push downwards into the bottom of the cartridge.  Note: The cartridge contains a sponge and a
slight resistance will be felt.
4. Slowly inject up to 7-10ml.of ink until the sponge is saturated.  Do not reseal the filling holes. Impor-
tant:   Do not inject the last ml if air bubbles are present.
5. Set above a paper towel for an hour as a drip precaution. Do not allow the cartridge to touch the
paper, since the paper will draw out the ink.
6. Re-insert the cartridge into the printer following the instructions in your printer manual.

IMPORTANT - for best results, cartridge should be refilled whilst some ink remains. Empty cartridges should be refilled immediately.
This work is best done over the sink.

51640C/ M/ Y & 51644C/ M/ Y

1. Turn the cartridge upside down. Carefully using a penknife or similar take off the black plastic film
and push in the ball bearing that seals the filling hole with a ballpoint pen.
2. Slowly inject up to 20-25ml. of the correct colour ink (cyan, magenta or yellow) into the filling hole.
3. Seal the filling hole by squeezing the cartridge sides (this will create a vacuum when let go) and in-
serting the plug seal provided into the hole. This seal must be airtight, if it is not, use some additional
tape to ensure an airtight seal or the cartridge will not work. Some ink will leak from the print head.
4. Place the cartridge print head down on absorbent paper for 2 minutes to draw out any excess ink
and equalize pressure in the ink chamber.
5. Fill each colour required & then place the cartridge(s) back into the printer and run a priming cycle
per printer instructions or print a couple of test pages.

IMPORTANT - for best results, cartridge should be refilled whilst some ink remains. Empty cartridges should be refilled immediately.
This work is best done over the sink.

HP C6656A No.56 ,HP C8727A No.27, No.21,No.339,

Instructions:
1. Put the cartridge on some paper towels in an area where you can tolerate a spill.
2. Peel off the top label.
3. Very CAREFULLY/ SLOWLY inject about ½ a full black ink syringe into any hole (they all go to the same
sponge ~ so it doesn’t matter which one you choose).
4. When finished, replace the top label with additional tape if required.
5. Replace the cartridge and run 1 - 3 cleaning cycles as per printer instructions.
If necessary leave newly filled cartridge in printer for up to 24 hours before using.
The cartridge will print just like a new one.

IMPORTANT: Even though the cartridge prints just fine, the ink level gauge will NOT read full after a refill.

HP C6657A No.57, HP 8728A No.28, No.22, No.344,

1. Put the cartridge on some paper towels in an area where you can tolerate a spill.
2. Peel off the top label & cover 2 of the holes with tape leaving one hole free.
3. Very SLOWLY/ CAREFULLY inject about 5ml (Cyan/ Yellow/ Magenta) ink into the correct chamber
until the sponge is full. A little ink might come out of the top when full, simply wipe this off. Then cover
the hole of the chamber that you have just filled and remove it from one of the other holes. Repeat
this process for the final colour.
4. When finished, replace the top label with additional tape if required.
5. Replace the cartridge and run 1 - 3 cleaning cycles as per printer instructions.

If necessary leave cartridge in printer for up to 24 hours.
The cartridge will print just like a new one. Even though the cartridge prints well, the ink level gauge will NOT read full after a refill.

HP 2000

Instructions:
1. Cut label at joint between top and bottom cap of the cartridge case.
2. Flip back bottom cap of cartridge.
3. Squeeze sides of cartridge case and carefully wiggle out Mylar ink bag and pump assembly from the
insert lock.
4. Screw the eyelet screw into the centre of the rubber sealing plug, (situated in the filling hole) until a firm
grip is made and pull out the plug. (Keep the plug on the end of the eyelet screw)
5. Inject the ink through the filling hole into the Mylar ink bag.  Do not insert the needle in more than 1.2 cm
or 1/2" into the bag or else the Mylar ink bag may be punctured.
6. Fill with ink until ink appears at the bottom of the filling hole and then reseal by pushing back in the rub-
ber plug. (Push in with the plug on the end of the screw and then remove the screw from the plug).
7. Remove the excess air from the Mylar ink bag and pump assembly as follows:
8. Hold assembly at a 45° angle with outlet hole tube at the top.
9. Insert needle of empty injector (with plunger pushed in) into outlet hole tube.
10. Press and release pump several times which will expel air into the syringe.
11. Pull back the plunger on the syringe to remove any air from the outlet hole tube and then withdraw the
syringe.
12. Replace the Mylar ink bag assembly into the cartridge case and clip the bottom back into position.
13. Install the cartridge back into printer.

Cleaning HP Print Heads

1. Only clean the print head if you get poor print quality or no print.
2. Be sure that you don't have an air bubble problem.

• If cleaning the print head causes the situation to get worse rather than improve, you probably have
  an air bubble problem.
• If you have an air bubble problem, you need to re-inject some ink very deep into the cartridge.

3. Follow the directions in the printer manual to run the cleaning routine.
4. If this doesn't work, take the cartridge to the nearest hot water TAP.

• Turn on the hot water. Let it get hot. BE CAREFUL!!!
• Put only the print head portion (where the ink comes out) under the hot water for 2 to 3 seconds
• Dry off the cartridge using a soft tissue.
• Re-insert the cartridge into the printer.
• Run the normal cleaning routine a few times.

TROUBLE SHOOTING HP CARTRIDGES

Air in the Sponge ~ Air or foamy ink in the sponge will make the cartridge print intermittently. Fold a paper towel 4 or 5 times and press it against the print head. Wrap some rubber bands or string around the cartridge and the paper towel and let it set for one hour. This will draw ink and trapped air out of the sponge.
After the hour is up, you should have a paper towel that is soaked in ink. Wipe off the cartridge and put some more ink into it. Install in the printer, run a cleaning cycle and print some black/colour pages.
Cartridge will not print ~ Check your print head to see if ink has dried on the surface and is blocking ink ... if so, blot the print head with a lint-free cloth and HOT, distilled water, let it dry and try again after doing the head cleaning operation as prescribed by your printer's manual. If it will still not print or print is "streaky", try alternating the head cleaning and printing several more times.
Clogged Jets ~ If you get skipping or severe banding this indicates that some of the jets are clogged. This is common with cartridges that have been empty for more than one hour. Boil some water in a kettle and pour some into a saucer. Hold the print head, just the bottom of the cartridge, in the hot water for 5 to 10 minutes. Then take the cartridge to the printer while it is still warm and run a cleaning cycle and print black/ full colour pages. You may have to repeat this a few times to get it going.
Electrical Problems ~ If you are getting plenty of ink on the paper towel, but nothing is coming out of the cartridge when you try to print, then it is an electrical problem. Under the foil on the side of the cartridge, there are some electronic circuits. They are very delicate. If something has impacted on, or hit this surface, chances are the electronics are damaged. The only remedy for this is a new cartridge.