Coolant (Closed Cooling System); Checking And Adding Coolant - Yanmar 3JH5E Operation Manual

12/05

Coolant (Closed Cooling System)

NOTICE
ALWAYS add LLC to soft water especially
when operating in cold weather. NEVER
use hard water. Water should be clean and
free from sludge or particles. Without LLC,
cooling performance will decrease due to
scale and rust in the coolant system. Water
alone may freeze and form ice; it expands
approximately 9% in volume. Use the
proper amount of coolant concentrate for
the ambient temperature as specified by
the LLC manufacturer. LLC concentration
should be a minimum of 30% to a
maximum of 60%. Too much LLC will
decrease the cooling efficiency. Excessive
use of antifreeze also lowers the cooling
efficiency of the engine. NEVER mix
different types or brands of LLC, as a
harmful sludge may form. Mixing different
brands of antifreeze may cause chemical
reactions, and may make the antifreeze
useless or cause engine problems.
JH Series Operation Manual
BEFORE YOU OPERATE

Checking and Adding Coolant

3JH5E
(1)
(2)
Figure 10
1 – Coolant Pump
2 – Seawater Drain from Seawater
Pump Cover
3 – Coolant Drain Cock
4 – Coolant Tank (heat exchanger)
Figure 11
1 – Flywheel Housing
2 – Coolant Drain Cock
3 – Stop Solenoid
(4)
(3)
026099-00X
(3)
(2)
(1)
026100-00X
43