Tractor Repair: Pre-Combustion Chamber, combustion chambers, combustion chamber

Question
HI, I have a B414 and need to allign one of the Pre-Combustion Chambers as it is hitting the glow plug. Having taken out the injector I am not sure how to get out the chamber. Do I need a special tool?

Cheers.

Answer
HI George.
Not sure if you have had the chamber out or you are putting it back after renewal.
I have just given away my copy of the hand book , do you have one, if so what does it say , but you have probably already looked? It struck me --but is it the correct glow plug the incorrect length could be the clue, do you have a matching set?
Check with the manual again .
Can you send drawing.
Martin