Haas sl30t spindle encoder ring removal

Long time reader, needs help
I have two Haas SL30 2006 CNC lathes, both need the aluminum encoder ring replaced on the rear of the main spindle. Both have belt driven spindles from below I don't know the correct procedure to replace these rings ($95 ea.), if I can. I'm not planning on removing spindle from machine, but will be replacing the 4V main drive pulley on spindle and a new motor with pulley during repair (don't ask). I'm sure the old ring can be cut, but how do I install new ring without damaging spindle?
Any help will be appreciated
Arcnspark

I have attached a picture of a SL30T spindle with the Aluminum ring still attached for clarification.
Arcnspark

If it is just pressed on, then heat the new one to about 250°-300° and slide it into place.

A cold chisel and a hammer will take the old one off. A couple whacks between a few teeth should expand it enough that it will just fall off, just like removing an engine flywheel ring gear.

If it's Loc-Tited in place, then some heat may be required to remove.

I don't know if it's clocked, but you might put a witness mark on the spindle to align a tooth to.