Liebherr Fault Code

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0x0462

Drilling Shuts Down on High Resistance

System

Rotary Drive

Symptom

Drilling Shuts Down on High Resistance

Diagnosis & fix steps

LOGIC: Rotary Gearbox Lubrication Oil Flow Sensor Feedback Erratic. ACTION: Inspect paddle-type flow sensor on top-drive recirculating lube loop. Clean metal fines off sensor probe; verify gearbox electric lube circulation pump motor supply breaker in +4T.

Red Seal field insights

Gearbox Seizure: Running high-torque casing or augering cycles with starved gearbox lubrication risks gear pitting and bearing failure; Litronic stops rotary torque if flow drops.

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