The heavy steel component inside the chuck that transfers rotational impact to the bit.
The casing that holds the motor, which might show cracks after heavy falls.
When disassembling to replace the anvil, use the parts diagram to note the orientation of the three rolling pins inside the impact mechanism. Installing them backward will destroy the tool. hilti sid 4 a22 parts diagram free
If you need help interpreting a specific part number or finding the exact link on Hilti’s regional website, let me know and I can guide you further.
The diagram will also show (screws, washers) that are often lost during disassembly. Having the diagram means you can order exactly those M3x10 Torx screws from Hilti’s spare parts store—not generic ones that might loosen under vibration. The heavy steel component inside the chuck that
: Compatible with Hilti B 22 series Li-ion batteries, featuring a release button and status indicator. Where to Access Diagrams and Spare Parts Official Operations Manual : You can view the full Hilti SID 4-A22 User Manual
This section converts the rotational energy of the motor into high-torque rotational impacts, providing up to and 3,500 impacts per minute . Installing them backward will destroy the tool
Online forums and Q&A platforms can be hidden goldmines for information. A search for your tool and the word "broken" or "spare parts" might lead you to a discussion where parts are mentioned.