Question on bench bleeding master cylinder

[Mike Holleman]

I am going to be swapping to front disc brakes in the next day or two, and was wondering if when I bench bleed the new master cylinder, do I need to separate it from the vacuum booster? They were shipped to me already put together, and I didn't know if it would be ok to work the piston with the rod coming from the back of the booster, or if it was a better idea to take it apart.

Any help is appreciated. Thanks.

The point of bench bleeding is to be able to fully stroke the master to be sure all air is removed. You can only know for sure this is taking place with the master seperated so you can manually stroke the piston until all air is removed. Put it in the vise.
Mike