DE08TS Diesel Engines
Major Maintenance
MAJOR MAINTENANCE
Preventive Maintenance
The preventive maintenance means that the operator
performs the servicing of engine to obtain long life
and best performance from DOOSAN diesel engine.
Cooling Water
1.
Regarding the cooling water that is to be used for
engine, the soft water not the hard water must be
used.
2.
The engine cooling water can be used diluting it
with antifreezing solution 40% and the additive for
rust prevention (DCA4) 3 ~ 5 %.
3.
The density of above solution and additive must
be inspected every 500 hours to maintain it prop-
erly.
NOTE :
The proper density control of antifreezing
solution and rust preventing additive will be able to
prevent the rusting effectively and maintain the sta-
ble quality of engine.
For the improper control might give the fatal damage
to the cooling water pump and cylinder liners, detail
care is needed.
4.
Since DE08TS (diesel engine of D1146 series)
cylinder liner is dry type, particularly the cooling
water control should be applied thoroughly.by the
cooling water test kit. (Fleetguard CC2602M or
DOOSAN 60.99901-0038)
5.
The density of antifreezing solution and additive
for rust prevention is able to be confirmed by the
cooling water test kit. (Fleetguard CC2602M or
DOOSAN 60.99901-0038)
6.
How to use the cooling water test kit
a. When the cooling water temp. of engine is in
the range of 10 ~ 55 °C, loosen the plug for
cooling water discharge and fill the plastic cup
about a half.
NOTE :
In taking the cooling water sample, if the
water in auxiliary tank were taken, it is hard to mea-
sure the accurate density.
Take the cooling water sample necessarily loosening
the cooling water discharge plug.
b. A t the state of a test paper soaked in the sam-
pled water, after taking the paper out through
water agitation, shake off the water.
c. Wait for about 45 sec.
Till the color change of test paper.
NOTE :
However, it should not elapse longer than 75
sec, and if it did, the hue would change.
d. Make the numerical value by comparing the test
paper which hue has changed with the color list
of label on storage bottle.
e. By comparing the hue changed into yellowish
green or so with the green color indication of
test paper storage bottle, confirm the density.
(Then, the density indication must be in the
hue range of 33% to 50%).
f. The brown at the middle of test paper and the
lower pink color indication represent the additive
state for rust prevention, and the proper range is
that the meeting numerical value of brown (verti-
cal) and pink color (horizontal) locates in the
range of 0.3 to 0.8 at the color list of label on the
test paper storage bottle.
g. In case of less than 0.3, replenish the additive
for rust prevention (DCA4), and in case of more
than 0.8, pour out the cooling water about 50%
and then readjust the density after refilling with
clean fresh water.
7. Amount of Anti-freeze in winter
13
Ambient
Temperature
(
˚C
)
Over -10
-10
-15
-20
-25
-30
-40
15
20
27
33
40
44
50
Anti-freeze
(%)
Cooling
water (%)
85
80
73
67
60
56
50
