TROUBLESHOOTING
8LV Series Operation Manual
63
Breakdown of turbo-charger
Drop in intake pressure
Dirty air filter
Clean
Leak from intake piping
Repair
Leak of exhaust gas
Repair
High intake air temperature
Complete thermal insulation of
exhaust pipe
Ensure intake air path is unrestricted
from outside air
Clean air filter
Drop in air pressure in engine room
Ensure intake air path is unrestricted
from outside air
Broken seal ring
Replace
Broken turbine impeller
Replace
Broken nozzle ring
Replace
Dirty turbine impeller
Clean
Clogged nozzle
Clean
Clogged exhaust pipe
Clean
Increased intake
pressure
Exhaust gas leak
Re-mount turbo-charger
Failure in fuel injection system
Overhaul injection pump, repair or
replace any defective parts
Disassemble and inspect injection
valve, replace injection valve
Deformed turbine nozzle
Replace
Abnormal vibration
Broken turbine impeller
Replace
Broken compressor impeller
Replace
Deposit of carbon or oxides on turbine
Remove and repair or replace
Broken bearing
Replace
Bent turbine shaft
Replace
Loose parts or fasteners
Tighten
Noise
Damaged bearing
Replace
Contact by revolving parts
Repair or replace
Dirty or carbon deposit on turbine and compressor
Clean
Entrapment of foreign matter (at turbine entrance)
Repair or replace
Rapid change in load (surging)
Stabilize the load or replace turbine
nozzle
Quick contamination of
engine oil
Gas trapped in bearing housing
Repair
Clogged seal air path
Clean
Damaged seal ring
Replace
Clogged pressure balance path
Clean
Symptom
Probable Cause
Measure
8LV_OPM.book 63 ページ 2011年1月11日 火曜日 午後12時8分