Not sure about ThyssenKrupp units but I've changed Montgomery HR's and KONE Eco3000's without having to have them vulcanized. You'll need to pull a few steps and take a good look to see if it is possible.
If it's the Velino, it will have to be cut, and pull a new double booted one in and vulcanized. I recommend a plastic one over rubber. It eliminates static shock.