This looks a little like my Voest. My manual describes changing the
belts similar to what you describe, removing the front/rear spindle
covers and lock-nut, then driving the main spindle (with a block of
wood) out the front to free the V-pulley. It says to drive the spindle
about 4", then it will come out freely. It also mentions removing a
check ball/spring to keep them from falling into the sump. Good luck.