Yammer Vio80U-3 Midi Excavator Fuel Tank 2026

The Yanmar ViO80U-3 fuel system includes several components that contractors need to know about when planning maintenance schedules or troubleshooting operational issues:

Fuel Filter Assembly (Y014B-75200) – Located on the driver’s side of the engine compartment, this primary filter has a 2-micron rating and should be replaced every 500 operating hours. The secondary inline filter (part Y014B-75210) sits between the tank and fuel pump and requires replacement at 250-hour intervals during heavy-duty commercial use.

The fuel pump assembly is an electric diaphragm type with integrated level sensors that feed data to the Yanmar Monitor system. On jobsites where operators run machines continuously through lunch breaks, these sensors have been reported to occasionally provide false “low fuel” warnings when tank levels are actually adequate—likely caused by fuel sloshing in the tank during transport between sites.

Critical Fuel Line Routing Considerations

The fuel lines on the ViO80U-3 route along the left side of the undercarriage, protected by a reinforced steel guard that covers most of the path from tank to engine. However, the return line runs unprotected through the track area and is vulnerable to damage if you’re working in tight residential lots where debris gets kicked up during digging operations.

Contractors who’ve operated these machines for extended periods report that fuel contamination is more common than mechanical failure. The 37-gallon capacity means you need roughly 6 gallons per hour of operation, which puts the system under significant stress if operators forget to top off between shifts on multi-day projects.

Bottom line: Budget for annual fuel filter replacement at $180-220 per set and inspect return line routing whenever you’re performing track maintenance or hydraulic service.

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