Hitachi EX 3600-6, Operator'S Manual

Page: 222 / 306

MAINTENANCE
7-83
G. COOLING SYSTEM
Interval (hours)
Parts Quantity
10 50 250 500 1000 1500 2000
1. Check Coolant Level
1
2. Check DCA4 Concentration in Coolant −
3. Replace Coolant Filter 2
4. Change Coolant 614 L (162 US gal) Twice a year, in spring and autumn Ä
5. Clean Radiator, After Cooler Interior 1+1 When changing coolant
6. Clean Radiator, After Cooler Core
1+1
NOTE:
Ä
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.