It comes out as a unit, sorry. While you have it out it would really be best to do a complete rebuild. If my memory is accurate, the only special tools needed is a method to measure the end play or clearance in the drive train from the front of the main case to the thrust face of a shaft. This requires a selective fit washer to get it right.

You really want to measure this once and set it up right. I distinctly recall R&Ring a 60 cast iron PG 8 times because I tried to use a jury rigged tool to do this measurement.