Here's a more detailed breakdown of the parts:
If you ever get stuck, Hilti’s technical support can annotate the diagram for you over a video call. But armed with this deep dive, you are now ready to diagnose, order, and replace any component in your SID 4 A22. Keep the diagram in your toolbox or phone, and never let a broken part stop your job again. hilti+sid+4+a22+parts+diagram