Operation and Maintenance Manual and User Service Guide for Industrial Power WP10 Series Diesel Engine
10
Coolant classification
Coolants are classified into two grades according to the engine loads:
a. Coolant for light engine load
b. Coolant for heavy engine load
1.3.2 Correct selection of coolant
Coolant selection is dependent on the ambient temperature. Generally, the
antifreeze selection standard is to be lower than ambient temperature by 10
℃
.
Never use water as the coolant.
Relation between the freezing point of coolant and mass fraction of glycol
Freezing point
of coolant /
℃
Mass fraction of
glycol
(
％
)
Mass fraction of
water
(
％
)
Density/(kg.m-
3)
10
26.4
73.6
1.0340
20
36.2
63.8
1.0506
30
45.6
54.4
1.0627
40
52.3
47.7
1.0713
50
58.0
42.0
1.0780
60
63.1
36.9
1.0833
1.3.3 Correct use of coolant
a.
Do not overhasty fill the coolant. Otherwise, the gas in the engine can
not be drained. It is better to keep the filling speed at 13.5L/min.
b.
Do not fill the radiator up for the first time. Start engine to let its
temperature rise, then check the coolant level again. If needed, refill
again.
c.
The concentration of antifreeze should be inspected every 1000h. The
antifreeze should be changed every two years to avoid corrosion.
d.
Each time of maintenance or starting engine, check for coolant level and
leakage.
e.
Avoid continuously running diesel engine with coolant lower than
60
℃
or higher than 100
℃
. If the coolant temperature is lower than
60
℃
or higher than 100
℃
, find out the cause and resolve it.
