Komatsu Fault Code
Free · no signupCode 52-11
Propulsion Cutout / Blower Warning
System
Electric Propulsion
Symptom
Propulsion Cutout / Blower Warning
Diagnosis & fix steps
LOGIC: Traction Motor Blower Air Flow Differential Pressure Low.
ACTION: Inspect main blower intake screen on the upper deck for rock dust packing. Check blower drive motor current draw and verify differential pressure switch tubing is free of dust blockage.
Red Seal field insights
Thermal Hazard: GE/Komatsu AC wheel motors pull huge amperage climbing steep open-pit ramps; dropping cooling airflow triggers an immediate drive lockout to protect the stator windings.
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