Doosan DA40 - Engine difficult to start

SHOP MANUAL
Engine
Ch 1 page 240
Eect Cause Trouble shooting Action
Air in fuel system
Leakage in suction pipe
The highest fuel level in
the tank is lower than the
feed pump. A longer
standstill (days) the fuel
in the suction pipe may
run back to the tank
because of a leaky over-
ow valve
- Install a ”daily supply
tank” at a higher loca-
tion than the feed pump
Leaky overow valve
Low battery voltage
Ambient temperature
too low
- Starting aids are not
normally needed at
temperatures above
-15 ° C
Oil viscosity too high
Paran precipitation in
the fuel
Blocked intake or
exhaust system
No fuel
Stop lever in stop posi-
tion
- Check the stop
solenoid and links
Wrong injection timing
Faulty injector
Control rack/pump ele-
ment will not go into the
cold start position.
Binding control rack/
pump element
Open the cover (RQ/
RQV) or hexagon (RSV)
on the governor and
check with a nger on
the control rod that it
goes to the maximum
stop bracket.
(This applies to engines
without smoke limiter
on the governor hous-
ing.)
- Take the pump to a
Bosch workshop for
repair
- Preheat the engine
combustion chambers
by running the starter
motor with the stop
control in stop position
for about 15 seconds.
Then start in the usual
way.
Engine difficult to start