TROUBLESHOOTING
64
8LV Series Operation Manual
Pulsation of intake air
pressure
Uneven cylinder combustion Adjust for uniform combustion
Rapid change in load Operate correctly
Excessively dirty compressor side Clean
Intake temperature too high Clean cooling fin
Complete thermal insulation of
exhaust pipe
Ensure intake air path is unrestricted
from outside air
Other Bearing seizure Replace
Corrosion in compressor/turbine impeller or bearing
housing
Increase the coolant temperature
Other malfunctions
Noise generation Loose flywheel set bolts Tighten bolts
Loose connecting rod bolts Tighten bolts
Worn crank pin Replace
Excessive gear backlash Inspect the gear; replace worn gear,
shaft, and/or bushing with new ones
Low lubrication oil
pressure
Clogged engine oil filter Replace
Engine oil temperature too high Check the seawater level
Failure of oil pump Overhaul or replace
Faulty operation of oil pump relief valve Tighten the adjusting valve
Replace the safety valve
Low viscosity of engine oil used Replace the engine oil
Insufficient engine oil quantity Add oil
Faulty pressure gauge or sender unit Replace
Coolant temperature
too high
Insufficient seawater Replace seawater pump impeller
Faulty thermostat Replace
Loose drive belt of coolant pump Adjust the belt tension
Overloaded operation Decrease the load
Other Controller defects system error Inspect and conduct servicing
Symptom Probable Cause Measure
8LV_OPM.book 64 ページ ２０１１年１月１１日 火曜日 午後１２時８分
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