WP13 Diesel Engine Series Operating Manual
5
3.4 Antifreeze additive of the Engine Cooling System
It adopts the antifreeze additive of ethylene glycol, with domestic long-acting antifreeze additive
permitted for alternative, but the quality must be reliable, referring to the relevant instructions for its
specific use. Currently, the two long-acting antifreeze additives domestically available are
recommended as follows:
Type JFL-336 long-acting antifreeze additive
FD-30# long-acting antifreeze additive
It should be noted that the long-acting additives should be regularly replaced in accordance with the
relevant requirements.
Calculation of antifreeze additive (only for reference)
Total coolant: 40L (when the mounted engine is equipped with a radiator)
Antifreezing check temperature at present: - 20°C
Minimum antifreezing temperature as required: - 30°C
Calculation method: Find out the point of the total coolant of “40L” on the abscissa, draw a line
through the point, and find out its intersections 1 and 2 with the above oblique lines of - 20°C and -
30°C (as shown in Figure 3-2).
Result: in time of - 20°C, 13.5L antifreeze additive should be added.
The antifreeze additive quantity in time of -30°C has a difference of 4L from that in time of - 20°C.
According to the above difference of 4L, then calculate the additive amount by 50% more, which is
necessary. Before filling the antifreeze additive, a portion of the coolant must be drained, so that the
antifreeze additive in the drained coolant will be drained at the same time.
Therefore, the amount of antifreeze additive should be 4L+50%
×
4L=6L.
6
8
10 12 14 16 18
20 22 24 26 28
30 32 34 36 38 40
42 44 46 48 50 52
54 56
2
4
6
8
10
12
14
16
18
20
22
24
26
28
17.5
13.5
Minimum freezing temperature
Amount of coolant (L)
A
m
o
u
n
t
o
f
a
n
ti
fr
e
ez
e
a
d
d
it
iv
e
Figure 3-2 Calculation of Antifreeze Additive
