Doosan DA40 - Polluted coolant; High oil temperature; High exhaust temperature

SHOP MANUAL
Engine
Ch 1 page 248
Polluted coolant
High oil temperature
High exhaust temperature
Eect Cause Trouble shooting Action
Boiler scale on
engine heater
Incorrect mixture or type
of glycol and/or corro-
sion inhibitor
Anti-freeze with phos-
phate-based inhibitor
must not be used
- Clean the cooling sys-
tem and ll it with
coolant as described in
the maintenance
instructions
Short service life
The heater is not
designed for continuous
engagement. Suitable
temperature for thermo-
stat control = 40 - 60 ° C
Eect Cause Trouble shooting Action
- Instrument indi-
cates too high tem-
perature
- Defective sensor/
instrument
Check with separate
instrument
- Poor water ow in oil
cooler
Eect Cause Trouble shooting Action
Adjusted injection pump
Check the lead seal,
check CRO if necessary
- Test in test bench
Wrong injection timing
Check the injection tim-
ing
Nozzle drips
Check type, opening
pressure and general
condition
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 inlet air tempera-
ture
Low charge air pressure
Clogged air lter