BROTHER  LC51

1) Cut label at joint between top and bottom halves of the cartridge case.

2) Flip open the cartridge casing (shell).

3) Put the sharp filling needle onto the syringe and fill the syringe with ink.

4) Pierce the top part of the cartridge with the needle and S-l-o-w-l-y inject 15cc of ink into the cartridge bag.

5) Put a piece of aluminum tape over the filling hole.

9) Place the casing (shell) back together and use a piece of tape to hold the two sides of the casing (shell) together.
Note: Do not bump or press the "pressure release button".

10) Replace the cartridge(s) and run 1 - 3 cleaning cycles as per printer instructions.
Or print the following pages:
http://www.refillinstructions.com/black.htm  for Black
http://www.refillinstructions.com/color.htm  for Color 

Alternate refill instructions are located here
http://www.refillinstructions.com/Brother/B5.htm

Note: this is not among the easiest cartridges to refill. For a simple solution go here:
http://www.refillinstructions.com/Brother/B7.htm