Cooling System; Coolant - Hitachi ZW 550-6 Operator's Manual

G. Cooling System

Coolant

Use fresh water or normal tap water as the coolant water.
Do not use strong acid or alkaline water. Use of the genuine
Hitachi Long-Life Coolant (LLC) mixed by 33 to 50 % is
recommended.
If the air temperature is expected to fall below 0 °C (32 °F),
fill the cooling system with Long-Life Coolant (LLC) and soft
water mix. As a general rule, the ratio of LLC should range
between 33% and 50% as shown in the table below. If the
ratio is below 33%, the system may develop rust, and if it is
above 50%, the engine may overheat.
LLC Mixing Table
Air
Mixing ratio
temperature
%
°C (°F)
-15 (5.0) 33
-20 (-4.0) 38
-25 (-13) 43
-30 (-22) 48
f
NOTE: To avoid water impurity and minerals, a premixed
coolant is recommended to use.
d
WARNING:
 Antifreeze is poisonous; if ingested, it can cause
serious injury or death. Induce vomiting and get
emergency medical attention immediately.
 When storing antifreeze, be sure to keep it in a
clearly marked container with a tight lid. Always
keep ANTIFREEZE out of the reach of children.
 Be careful of fire hazards. LLC is specified as a
dangerous substance in the fire protection law.
 If antifreeze is accidentally splashed into eyes, flush
with water for 10 to 15 minutes and get emergency
medical attention.
 When storing or disposing of antifreeze, be sure to
comply with all local regulations.
MAINTENANCE
Coolant Capacity: 88.0 liter
(23.2 gallons)
LLC Soft Water
liter (gallon) liter (gallon)
29.0 (7.7) 59.0 (15.5)
33.4 (8.8) 54.6 (14.4)
37.8 (10.0) 50.2 (13.2)
42.2 (11.1) 45.8 (12.1)
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