This is the quick external-parts substitution card for the highest-value CUT65 torch-head, air, and guide-hardware splits.
| Complaint branch | Swap first | If the complaint follows the part... | If the complaint stays with the machine... |
|---|---|---|---|
| no pilot or weak pilot | fresh A81 front-end stack | keep diagnosis in the torch branch | move to pressure and RV1 logic |
| pilot changes with pressure | dry air path and stable regulator setting | keep diagnosis in the air branch | move deeper only if pressure is proven stable |
| guided or stand-off complaint | known-good guide and stand-off hardware after freehand proving | keep diagnosis external and mechanical | move deeper only if freehand and guided cuts both fail |
| postflow normal but start still absent | hold the external branch steady and retest | keep diagnosis in torch-head mechanics until proven otherwise | move to control logic only after the external path is clean |
07001400: use the official parts path above.07CV0026: use the official parts path above.07CV0052: use the official parts path above.