Fault Phenomenon: General diesel forklift instrument displays low engine oil pressure alarm, engine makes abnormal noise.

Troubleshooting Process:
– Checked oil level: level low.
– Checked oil pump: pump worn.
– Checked filter: filter clogged.
– Checked bearings: bearing clearance too large.

Root Cause: Worn oil pump or excessive bearing clearance causes low pressure.

Required Parts: Oil pump or engine overhaul.