Yanmar EF-494T, Technical Manual

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1 PERIODICAL INSPECTION 1 PERIODICAL INSPECTION
EF494T TM 06/2011 edition 29
Replacing
(1) Remove the radiator cap and the drain plug
(A) to drain off the engine cooling water.
(2) Clean the radiator with tap water until dust or
rust is all drained out.
• It is suggested to use radiator detergent.
Run engine in idling speed for more than 15
minutes and remove the water.
(3) Put drain plug and add anti-rusting fluid
fallowing the instruction of fluid. Fill fresh
water until it overflows.
(4) Put radiator cap and start the engine to mix
the anti-rusting fluid with fresh water.
NOTE:

When the new cooling water has been added,
never fail to put anti-rusting fluid and run engine
in idling speed for about 5 minutes to ensure
mixing.

For mixing ratio of anti-rusting fluid, fallow the
instruction of Manufacturer of fluid.

When cooling water level becomes low, add only
fresh water.
(A) Radiator drain plug
1.8 REMOVING WATER FROM WATER
SEPARATOR
The water separator is mounted on the lower part of
the fuel tank. When the red O-ring comes up, put
the fuel cock in the C position and detach the
transparent case. Then, remove water.
Clean water separator every
300 hours and drain
water every 50 hours . If strainer was damaged,
replace it.
(a) Open
(b) Close
(A) Water separator
Cleaning water separator strainer
(1) Turn fuel cock to (b), in the C (Close) position.
(2) Turn retaining ring (E) to loosen, remove ring
and detach water separator bowl.
(3) Clean strainer, inside of bowl.
(4) Reinstall strainer, bowl and retaining ring.
(5) Turn fuel cock to (a) to open the fuel cock, in the
O (open).
NOTE:
Strainer is made of plastic and be careful not to
damage. It is suggested to clean it with used
toothbrush or soft brush.
If strainer was damaged, replace it with new
genuine part.
(A) Water separator
(B) Fuel cock
(C) Strainer
(D) Drain cock
(E) Retaining ring