Hilti+sid+4+a22+parts+diagram - [portable]

This is usually the largest item on the diagram.

The battery guide rails (#225413) are a common break point. The parts diagram shows they are replaceable independently – you don’t need a full housing. hilti+sid+4+a22+parts+diagram

| Symptom | Likely Parts (check on diagram) | |---------|---------------------------------| | Driver runs but makes grinding noise | Ring gear (#21), planetary gears (#17-18) | | No impact – just spins freely | Impact block worn (#26), anvil cracked (#19) | | Bit falls out / won't lock | Hex chuck (#11) or retention ring (#12) | | Intermittent power / LED flickers | Battery terminals (#45) or motor controller (#38) | | Forward/reverse won't engage | Selector cam (#6) or spring (#7) | This is usually the largest item on the diagram

Common failure points: The trigger switch (part #4112347) and the control board’s power MOSFETs. The diagram shows the ribbon cable connecting trigger to control board. | Symptom | Likely Parts (check on diagram)