Doosan DA40 - Page 254

Engine
SHOP MANUAL
Ch 1 page 209
The safety
valve is
defective
H-a The engine will start.
Check the safety valve as
described in H3.
The safety
valve is
working
The safety valve
opens when idling.
Check for internal leaks as
described in H1.
The pressure is
normal
The pressure is
falling and ...
... cylinder is not identied
... cylinder is
identied
... there is
external leakage
Check the return fuel
pressure as described
in H2.
Verify the defective injector
and plug as described in H5.
The cause may be
external leakage.
Rectify the leak
and continue from
S-a.
The pressure
is normal
The pressure
is too high
The fault
cannot be
veried
Fault
veried
Check the fuel inlet
metering valve using
SDP3.
Check for internal leaks
as described in H6.
The cause may be
the injector.
Renew the
injector and
continue from
S-a.
Fault
veried
The fault cannot
be veried
The fuel inlet
metering valve
is working
The fuel inlet
metering
valve is
defective
The cause may be the fuel
inlet metering valve. Renew the
valve and continue from S-a.
The problem may be in the high pressure
pump. Check it as described in H9 and repair
all faults that are detected. Continue from S-a.
The cause may be the high
pressure connections. Detach
and visually inspect all high
pressure connections and
torque tighten them.
Continue from S-a.
The cause may be the
safety valve.
Renew the valve and
continue from S-a.
H-a High pressure check when the engine will start
H-a High pressure check when the engine will start
Figure 383