Doosan D439E - Page 166

D439E Service Manual 4. Fuel system
164
OK
En
g
ine sto
p
Oil leak
Check fuel hose
(for damage etc)
OK
Repair
Check the
leakage between supply
pump and common
rail pipe
Check locking.
Replace the pipe if
l
ea
k
s
.
NG
Leak
Check if fuel line
clogged
OK
Clean the clogged
area and replace
f
ue
l fil
te
r
PC sensor, unusual
out put
Check normal output
of PC sensor at 0 Mpa
OK
Replace common
rail (PC sensor)
Check PC
sensor (Diagnosis
equipment) Check to see
if pressure increases to the
pressure set at leakage
check mode and check
PC movement at the
same time.
Replace
the
commonrail
PC sensor, unusual
output
Check Pressure limiter
leakage (Return pipe at the
pressure limiter is cold,
warm-up)
NG
Replace supply
pump
Hot
Cold