For those needing or wanting instructions.

1) Pull throttle linkages off and out of the way.
2) Remove Injector lines from injectors and pump and set aside.
3) Remove injectors and injector heat seal (I used an old dental pick)
4) Remove glow plugs.
5) Remove prechamber collars.
6) Screw tool into prechambers and extract using slide hammer (Mine took about 10 smacks each but I have heard of others that were very stuck)
7) Make sure prechamber seal ring is also removed.
8) Clean out any carbon / soot / dirt.
9) Using new prechamber and new seal ring, thread tool into prechamber and tap into place firmly.
10) Install new collar
11) Install new glow plugs.
12) Instal new heat seal and Injector
13) reconnect injector lines, throttle linkage and glow plug wires.