Repair Ibag spindle

Hi.
I have a Ibag HF45 spindle what needs cleaning/new bearings. I talked to Ibag service, but the price is way to high for a hobbyist.
So I've come to the conclusion that I will try to open the spindle and see if I can just clean and re-lubricate the bearings with Klüber NBU15 and leave the bearings in the exact same position.

My question is:
What are the odds for me scrapping the spindle?
Do I need any special tools like a hydraulic press?
Will I need to use heat/cooling to take it apart?
Do anyone have a Ibag service manual?