Cooling System; Check Coolant Level - Hitachi EX 3600-6 Operator's Manual

G. COOLING SYSTEM
Parts

1. Check Coolant Level

2. Check DCA4 Concentration in Coolant
3. Replace Coolant Filter
4. Change Coolant
5. Clean Radiator, After Cooler Interior
6. Clean Radiator, After Cooler Core
NOTE: Before leaving the Hitachi factory, the cooling system is filled with a mixture of water and Genuine
Hitachi Long-Life Coolant. As long as Genuine Hitachi Long-Life Coolant is used, the service inter-
vals between changing the coolant is once every two years, or every 4000 hours, whichever comes
first.
Coolant
Use a proper coolant mix of water, antifreeze and anti-
corrosive agent DCA4.
NOTE: DCA4 is a brand name of Dry Chemical Addi-
tive manufactured by the America Fleetguard
Co.
1. Water
Use soft water with fewer impurities or tap water as a
coolant.
If hard water with many impurities is used, the anti-
corrosive agent DCA4 will be neutralized and loose
its effect as an anticorrosive agent.
2. Long-Life Coolant
Long-Life coolant protects the cooling system from
rusting and freezing.
Long-life coolant can be used throughout the year
without changing.
As long as Genuine Hitachi Long-Life Coolant is used,
the service interval between changing the coolant is
once every two years, or every 4000 hours, which-
ever comes first.
IMPORTANT: Long-Life Coolant concentration is usu-
ally 50%. However Long-Life Coolant
concentration should be changed for the
cold weather range. Refer to the manual
for Cummins Engine.
MAINTENANCE
Quantity
1
−
2
614 L (162 US gal)
1+1
1+1
7-83
Interval (hours)
10 50 250 500 1000 1500 2000
Twice a year, in spring and autumn
When changing coolant