Yanmar BY series Dokumentacja Strona 108

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TROUBLESHOOTING
BY Series Operation Manual 101
Engine Overheat
Engine Runs Cold
Coolant Loss
Problem / Symptom Cause Action
Instrument Shows High
Temperature
Clogged seawater inlet Clean
Low coolant level Fill with coolant / inspect for leaks
Clogged seawater filter (if
equipped)
Clean
Clogged hydraulic cooler
See your authorized Yanmar dealer or
distributor
Seawater pump worn or
damaged
Defective sensor / instrument
Defective thermostat
Damaged closed coolant pump
Combustion gas leakage (causes
loss of coolant)
Seawater pump belt slips or
pump pulley loose on pump shaft
Clogged heat exchanger
Problem / Symptom Cause Action
Instrument Shows Low
Temperature
Defective sensor / instrument
See your authorized Yanmar dealer or
distributor
Defective thermostat
Cabin heater or boiler too large
Problem / Symptom Cause Action
Repeated Low Coolant Level
Defective cylinder head gasket
(external leakage)
See your authorized Yanmar dealer or
distributor
External leakage at connection
Coolant Forced Out of
Coolant Recovery Tank
Turbocharging pressure enters
cooling system via leaking charge
air cooler
See your authorized Yanmar dealer or
distributor
Defective cylinder head gasket
(internal leakage)
White Smoke when Engine
Hot Indicates Water Vapor
Crack in cylinder head (not cracks
between valve seats)
See your authorized Yanmar dealer or
distributorCracked cylinder wall
Leaking cylinder head gasket
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