Hitachi Fault Code
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Bucket Curl Slow / Power Slump
System
Hydraulics
Symptom
Bucket Curl Slow / Power Slump
Diagnosis & fix steps
LOGIC: Bucket Pressure Transducer Circuit Voltage Low (Short to Ground).
ACTION: Inspect bucket line pilot sensor harness for insulation breaks. Measure return signal pins at the central machine valve block interface.
Red Seal field insights
Electrical Floor: Signal returns slip below 0.2V. The main computer cuts auxiliary pump flow gains because it loses bucket operator demand tracking telemetry.
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