Hitachi Fault Code

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11304-3

Bucket Dump Function Sluggish

System

Hydraulics

Symptom

Bucket Dump Function Sluggish

Diagnosis & fix steps

LOGIC: Bucket Dump Pilot Pressure Sensor Signal Voltage High. ACTION: Inspect pilot line pressure sensor harness for short to 5V reference. Connect mechanical gauge to pilot block to check actual pressure against sensor sweep.

Red Seal field insights

Regeneration Lock: A 5V signal ceiling leads the machine controller to assume full operator pilot demand at all times, disabling hydraulic regeneration circuits.

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