Yanmar 4JH45 - Page 66

BEFORE YOU OPERATE
58 JH Series Operation Manual
1. Ensure all drain cocks are closed.
Note: The drain cocks are opened before
shipping from the factory.
Marine gear ZF25A does not have a
drain cock on the marine gear
cooler.
2. Loosen the filler cap of coolant tank to
relieve the pressure, then remove the
filler cap.
WARNING
Burn Hazard
Never remove the coolant filler cap if
the engine is hot. Steam and hot
engine coolant will spray out and
seriously burn you. Allow the engine
to cool down before you attempt to
remove the cap.
Figure 4
Figure 14
1 – Filler Cap Tabs
2 – Coolant Filler Cap
3 – Filler Port Notches
4 – Coolant Tank
3. Pour coolant slowly into coolant tank
(Figure 14, (4)) to avoid air bubbles.
Fill until coolant overflows from the filler
port.
NOTICE
Never pour cold coolant into a hot
engine.
4. Align filler cap tabs (Figure 14, (1)) with
filler port notches (Figure 14, (3)) and
tighten filler cap (Figure 14, (2)) firmly.
NOTICE
Always tighten coolant tank cap securely
after checking coolant tank. Steam can
spray out during engine operation if the
cap is loose.
Note: The coolant level rises in the
reservoir during operation.
After stopping the engine, the
coolant will cool down and the extra
coolant will return to coolant tank.
Figure 15
054746-00X00
1
2
3
4
LOW
FULL
4
1
2
3
K0004493
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