This demonstration guide answers one field question about arms that no longer meet tracking spec after a curb hit. Measurements come before parts, and the notes are not a generic equipment FAQ.
Diagnose before replacing parts
Start with tracking measurement. That reading separates arms that no longer meet tracking spec after a curb hit from adjacent faults that share the same complaint.
If the measurement is out of spec, treat the control arms as the primary path. If it is in spec, do not replace the control arms just to complete a parts list.
Repair the failed system
The usual correction is the control arms, installed to the documented spec for this complaint.
A demonstration shop records the finding so the next technician is not repeating a guess about arms that no longer meet tracking spec after a curb hit.
Stop before you make it worse
Do not heating and twisting arms until they "look even". That shortcut hides the original measurement and creates a second failure.
If the machine still fails after the control arms is corrected, convert the visit to a broader diagnosis rather than stacking parts.
Written and published by Ridgeline Small Engine.