LA26G

Measure actual SFOC through fuel consumption monitoring (tank dips, flow meters) and divide by output power. Compare against baseline ~165 g/kWh for Hanshin engines. Typical acceptable range is 170-230 g/kWh. Deviation >10% suggests maintenance issues (injector fouling, turbo underperformance, or fuel quality problems).

Test fuel CCAI (Calculated Carbon Aromaticity Index) - must be <840 for optimal combustion. Check kinematic viscosity at 50°C against ISO 8217 specifications (RMD=80cSt, RME=380cSt, RMG=700cSt max). Verify fuel pre-heating system operational (typically 120-150°C for supply). High CCAI or excessive viscosity causes carbon deposits, reduced fuel atomization, and ring sticking.

Measure exhaust gas temperatures (EGT) at each cylinder - should be 280-340°C. Check compressor discharge pressure (boost pressure) against design specification (typically 3.5-4.5 bar for Hanshin Low-Speed engines). Examine turbo bearing oil supply pressure and temperature. Significant EGT cylinder-to-cylinder variance (>30°C) or boost pressure below baseline indicates turbo fouling, blade erosion, or bearing wear.

For Low-Speed engines burning heavy fuel: verify cylinder oil feed rate matches fuel type and sulfur content (ISO 6743 specs). Inspect piston rings and liner for scuffing, deposits, or wear patterns. Check oil sump for excessive sludge accumulation (should be <10% by volume). Monitor bearing metal temperatures. BN (Base Number) depletion in crankcase oil indicates acid neutralization capacity degradation.

For mechanical fuel injection systems (LA/LH Series): verify fuel injection pump discharge pressure and spray pattern under loaded conditions. Check fuel nozzle seat leakage and spray atomization quality. For electronically controlled engines (EC-LA/EC-LH): verify solenoid pilot valve operation, proportional control pressure, and injection timing advance curves. Excessive fuel spillage at injectors or poor combustion signature (whitish exhaust) indicates wear or carbon blocking.