Demo/legacy repair — real data lives at cases posted by signed-in technicians.
Komatsu PC490LC — travel motor pulls left, no fault codes
Komatsu PC490LC-11 · Komatsu SAA6D125E-7
AI Summary
Verified across 9 cases: worn swash plate on left travel motor despite acceptable case drain at cold test. Load-holding test at operating temp is definitive.
Symptoms
Machine tracks left under load. Case drain flow equal both sides. No ECM codes.
Verified Repair
Replaced left travel motor. Verified tracking within 1% over 100ft.