Yanmar 4JH3-TE, Operation Manual

Page: 26 / 65

22 3. BEFORE OPERATION
3.5 Supplying Cooling Water
Burns from Scalding
• Never remove the filler cap of the fresh water cooler while the engine is still
hot.
Steam and hot water will spurt out and seriously bum you. Wait until the
water temperature has dropped, then wrap a cloth around the cap and
loosen it slowly.
• After inspection, refasten the cap firmly. If the cap is not secure, steam or
scalding water may be emitted during operation causing bums.
Fill the fresh water tank and the subtank with fresh cooling water.
1. Before filling, check to be sure the drain cocks (indicated in the diagram) are closed.
2. Remove the filler cap of the fresh water tank by turn-
ing the cap counterclockwise 1/3 of a turn.
3. Pour cooling water slowly into the fresh water tank so
that air bubbles do not develop. Supply until the water
overflows from the filler port.
Fresh water tank capacity:
See 2.2 Engine Specification
4. After supplying cooling water, replace filler cap and
tighten it firmly. To replace the cap, align the notches
on the back of the cap with the slots on the filler port
and turn clockwise 1/3 of a turn.
(Cont. on next page.)
5. Remove the subtank cap and fill with water to the
upper limit, FULL. Replace cap.
Subtank capacity:0.8l
6. Check the rubber hose connecting the subtank to the
fresh water cooler. Be sure the hose is securely con-
nected and there is no looseness or damage. If the
hose is not watertight, an excessive amount of cooling
water will be consumed.
Fresh water
pump
Lube oil
filter
Inter cooler
Oil cooler (marine
gear)
Fresh water cooler
Turbocharger
Turbocharger
Exhaust manifold
4JH3-TE /TCE
(Fresh water)
(Fresh water)
(Seawater)
(Seawater)
(Seawater)
(Fresh water)
(Fresh water)
(Fresh water)
(Fresh water)
KMH4A
Filler cap
Notches
Slots
Fresh water cooler
Filler cap
To fresh water tank
Upper limit
Lower limit