Doosan DA40 - Low charge air pressure; Low fuel pressure; Low system voltage

Engine
SHOP MANUAL
Ch 1 page 249
Low charge air pressure
Low fuel pressure
Low system voltage
Eect Cause Trouble shooting Action
Dirty/damaged turbine/
compressor wheel in tur-
bocharger
- Check/clean
Leakage between turbo-
charger and cylinder
head
- Check/change gaskets
Bearing seizure in turbo-
charger
Check bearing play
- Recondition/change
turbocharger
Clogged air lter
Check the vacuum
before the turbocharger,
max. 500 mm wc
High exhaust counter-
pressure
Take a reading, recommended counterpressure:
500 mm wc, max. 1000 mm wc
Check silencer, spark arrester, length and inside
diameter of exhaust pipe
High fuel temperature
Eect Cause Trouble shooting Action
Clogged fuel lter
Defective overow
valve
Defective feed pump
Air leakage in suction
pipe
High pressure drop in
suction pipe
Eect Cause Trouble shooting Action
(Normal charging
voltage:
27 - 28 V)
Broken alternator drive
belt
Slipping alternator drive
belt
Batteries in poor condi-
tion
Alternator fault
Voltage regulator fault
Battery charger fault