Doosan DP158L Series, Руководство по эксплуатации и техническому обслуживанию

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4. Regular inspection
44
Cooling system
General Information
The coolant should be replaced according to the cycle spec-
ified in the inspection interval table. If the coolant gets dirty,
the engine is overheated, and the coolant overflows in the
thermal expansion tank.
Coolant standards
We recommend you to inject the antifreeze about 40~50% of
the entire coolant. The antifreeze prevents the freezing and
corrosion of the system, and increases the boiling point of
water. In winter, you may need to change the amount of anti-
freeze per ambient temperature as shown in the table below.
The freezing point per antifreeze ratio shown in the table may
differ slightly depending on the antifreeze type. For more
information, see the specifications provided by the manufac-
turer.
Whenever you add coolant(water) to replenish the amount
reduced by engine operation, the antifreeze portion is
decreased. So, you need to increase the antifreeze level to
the proper level after replenishing the coolant.
• concentration of antifreeze during winter
Capacity of coolant
Checking the Coolant
1. For the engine coolant, you should use clean tap water.
2. To the engine coolant add 40% of antifreeze, and 3~5%
of additive (DCA4) to prevent corrosion.
3. Periodically check coolant to maintain the concentration
of antifreeze and additives.
4. The engine cylinder liner is of a wet type which specially
requires good coolant flow.
5. You can check the concentration of antifreeze and corro-
sion inhibitor using the coolant test sheet.
Ambient tem-
perature (
°
C)
Coolant (%) Antifreeze (%)
Above -10 85 15
-10 80 20
-15 73 27
-20 67 33
-25 60 40
-30 56 44
-40 50 50
Engine Mode
Coolant capacity (
ℓ
)
Inside engine With radiator
DP 158L About 23
About 79
(Air on 43
°
c)
About 90
(Air on 52
°
c)
DP180L About 27
About 91
(Air on 43
°
c)
About 114
(Air on 43
°
c)
DP 222L About 33
About 114
(Air on 43 ° c)
About 125
(Air on 52
°
c)
DANGER
If the radiator cap is opened to exchange or replenish
coolant while the engine is overheated, hot water will
spurt out and may cause serious burns. If it is abso-
lutely necessary to open the radiator cap while the
engine is overheated, wrap the radiator cap with a cloth
and slowly open the cap in two steps until the steam
pressure has been released from the inside. After the
steam pressure has been completely released, remove
the radiator cap.
DANGER
If you keep the antifreeze and corrosion inhibitor at a
proper level, you can prevent the corrosion of engine
effectively and keep the quality of the engine. Be
careful that, if managed improperly, it can give a fatal
impact on the coolant pump and cylinder liner.
Engine Mode
Coolant capacity (
ℓ
)
Inside engine With radiator