Fault Phenomenon: Volvo L90 wheel loader instrument displays high fuel water level alarm, engine may limit speed.

Troubleshooting Process:
– Checked separator: excessive water accumulation in fuel-water separator bowl.
– Checked sensor: water level sensor float stuck.
– Checked fuel: poor fuel quality, high water content.
– Checked drain valve: manual drain valve not closed or damaged.

Root Cause: The fuel contains a large amount of water, exceeding the capacity of the fuel-water separator, triggering the water level sensor alarm.

Required Parts: Drain water from fuel-water separator, replace fuel filter, inspect fuel source.