MAINTENANCE
IC120 ENG
4-23
Check concentration of coolant additive
Dry chemical additive (DCA) is mixed in coolant to protect the parts of the coolant system against
corrosion. Check the DCA concentration every 500 hours or twice a year.
Controlling DCA concentration
The proper DCA concentration is 0.39 to 0.79 unit/L. (The unit means the content unit of the
DCA.)
• DCA concentration of new machine
Total coolant capacity: 38.8 L
Material containing DCA
Part No.
Number of units
Coolant filter
WF9142
12
DCA solution
DCA60L x 2
10
Total
22
DCA concentration of new machine: 0.57 unit/L
• When replacing coolant filter every 500 hours or twice a year
Replace the coolant filter and measure the DCA concentration then.
Material containing DCA
Part No.
Number of units
New coolant filter
WF2071
4
Make sure that the DCA concentration is 0.39 to 0.79 unit per liter.
* Use the FleetGuard coolant test kit (part No. CC2602) to check the DCA concentration. This
test kit is supplied with a manual of the usage.
• When replacing coolant every 2000 hours or 2 years
Add 1.9 liters of DCA solution to coolant when replacing coolant.
Material containing DCA
Part No.
Number of units
Capacity
New coolant filter
WF2071
4
-
DCA solution
DCA65L
20
1.9 L
Total
24
DCA concentration when replacing whole coolant: 0.62 unit/L
Check anti-freezing solution concentration
Check the concentration of anti-freezing solution in coolant every 500 hours or twice a year.
Be sure to mix 50% water and 50% anti-freezing solution to protect the engine against the
temperature of -32
C throughout the year.
The anti-freezing solution has effects of lowering the freezing point of coolant, increasing the
boiling point and accordingly widening the operation temperature range. It is needed in all
seasons throughout the year.
* Use the FleetGuard Refractometer (part No. C2800) to check the freezing point of coolant and
the concentration of anti-freezing solution.
