IAI America SSPA - Manual (Page 87)

14. Motor Replacement Procedures
79
„ Reversed home specification
[When the jigs on the slider can be removed]
Remove the screw cover.
[If a slider jig, etc. cannot be removed]
(Note) Apply this method for SSPA since the spacer cannot be put.
Spacer
Set this part based on Attachment 2 on Page 78.
The use of a block gauge is recommended also in this case.