Yanmar 2TNV70 Service Manual

Also see for 2TNV70: Service manual Operation manual Service manual

Contents

TROUBLESHOOTINGTNV IDI Service Manual 13-15Troubleshooting ChartsTrouble Symptom Starting ProblemInsufficientEngineOutputPoorExhaustColorHigh Knocking Sound During CombustionAbnormal Engine SoundUneven Combustion SoundEngineSurgingExcessive Engine VibrationDifficulty in Returning to Low SpeedExcessive Fuel ConsumptionEngine OilExcessive Blow-by GasEngineCoolantAirIntakeExhaust Temperature RiseCorrective Action Reference PagesEngine Does Not Start.EngineStartsbut StopsSoon.ExhaustColorDuringWorkDuring IdlingDuring Work OperationExcessive Oil ConsumptionDilution by Diesel FuelOil with WaterLow Oil PressureOverheatLow Water TemperaturePressure DropPressure RiseExhaustSmokeOrdinaryWhiteBlackWhiteBlackCauseNoneLittleMuchFuel SystemAir in Fuel System O O O Bleed the Air. See “Priming the Fuel System” onpage 4-14.Clogged or Cracked Fuel Line O O O Clean or Replace.See “Check and Replace FuelHoses and Engine CoolantHoses” on page 5-25.Insufficient Fuel Supply to Fuel InjectionPump O O OCheck the Fuel Tank Cock, FuelFilter, Fuel Line, and Fuel FeedPump.See the appropriate procedure inPeriodic Maintenance on page 5-1Uneven Injection Volume from FuelInjection Pump O O O O O O O O O Check and Adjust. See “Testing of Fuel Injectors” onpage 7-23.Excessive Fuel Injection Volume O O O O O O O Check and Adjust. See “Testing of Fuel Injectors” onpage 7-23.Poor Spray Pattern from Fuel InjectionNozzle O O O O O O O O O Check and Adjust. See “Testing of Fuel Injectors” onpage 7-23.Priming Failure OForeign Matter Trapped in theValve Inside the Priming Pump(Disassemble and Clean).See “Fuel System Components”on page 7-9.Clogged Strainer at Feed Pump Inlet O Clean the Strainer. See “Drain Fuel Tank” onpage 5-13.