Quote Originally Posted by y0da900 View Post
I have a Smithy 622, which is also based on the KX3. Page 34 of the manual (link below) shows a blown up view of the head assembly. Might give you a few ideas on possible disassembly. There is more than one version of the spindle (R8 and integrated ER20 at a minimum), but there's a pretty good chance most of the assembly is identical with only a few things swapped around.

https://drive.google.com/file/d/1aOr...ew?usp=sharing fnf
Regarding the spindle pulley, it does sound like it may be pressed onto the spindle shaft, which could make it difficult to remove. You could try applying heat to the pulley to help loosen it or using a puller tool designed for removing pressed-on pulleys.

As for the X axis gib, it sounds like it may be too tight due to the broken gib strip. You could try using a file or sandpaper to smooth out any rough edges on the broken gib strip and see if that helps it move more smoothly. If not, you could try drilling and tapping a new screw, as you suggested, or looking for a replacement gib strip.