Cooling System - Hitachi EX27U Operator's Manual

G. COOLING SYSTEM
NOTE: ✱
Before leaving the Hitachi factory, the cool-
1
ing system is filled with a mixture of water and
long-life coolant, Hitachi Genuine Long-Life
Coolant. As long as Hitachi Genuine Long-Life
Coolant is used, the service intervals between
changing the coolant is once every two years
(in autumn), or every 2000 hours, whichever
comes first.
✱
Shorten the maintenance interval when the
2
machine is operated in dusty areas.
1. Coolant:
Fill the radiator with soft, pure tap or bottled water.
2. Anti-rust agent:
Add 0.14 L (0.15 US qt) anti-rust agent to the new
coolant when the coolant is changed.
It is not necessary to add anti-rust agent when anti-
freeze is used.
3. Antifreeze:
If the air temperature is expected to fall below 0°C
(32°F), fill the cooling system with an antifreeze and
soft water mix. As a general rule, the ratio of anti-
freeze should range between 30% and 60% as
shown in the table below. If the ratio is below 30%,
the system may develop rust, and if it is above 60%
the engine may overheat.
Antifreeze Mixing Table
Mixing ratio %
Air temperature °C (°F) –10 (14) –15 (5) –20 (–4) –25 (–13) –30 (–22)
CAUTION:
(1) Antifreeze is poisonous; if ingested, it can
cause serious injury or death. Induce vomiting
and get emergency medical attention immedi-
ately.
(2) When storing antifreeze be sure to keep it in a
clearly marked container with tight closing lid.
Always keep antifreeze out of the reach of
children.
(3) If antifreeze is accidentally splashed in the
eyes, flush the eyes with water for 10 to 15
minutes and get emergency medical attention.
(4) When storing or disposing of antifreeze, be
sure to comply with all local regulations.
30 35 40
MAINTENANCE
45 50
7-44