Fault Phenomenon: Komatsu GD655 grader instrument displays low engine oil pressure alarm.

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

Root Cause: The oil pump is severely worn.

Required Parts: Oil pump assembly.