Yanmar 4TNV98, Service Manual

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4TNV98 & 4TNE98 Diesel Engine Section 2. Periodic Maintenance 49
CAUTION
If the fuel filter / water separator is positioned
higher than the fuel level in the fuel tank, water
may not drip out when the fuel filter / water
separator drain cock is opened. If this happens,
turn the air vent screw on the top of the fuel
filter / water separator 2-3 turns
counterclockwise.
Be sure to tighten the air vent screw after the
water has drained out.
CAUTION
ALWAYS be environmentally responsible.
Follow the guidelines of the EPA or other
governmental agencies for the proper disposal
of hazardous materials such as engine oil,
diesel fuel and engine coolant. Consult the local
authorities or reclamation facility.
NEVER dispose of hazardous materials
irresponsibly by dumping them into a sewer, on
the ground, or into ground water or waterways.
Failure to follow these procedures may
seriously harm the environment.
Drain the fuel filter / water separator whenever
there are contaminants, such as water, collected in
the bottom of the cup. NEVER wait until the
scheduled periodic maintenance if contaminants
are discovered.
The cup of the separator is made from semi-
transparent material. In the cup is a red colored
float ring. The float ring will rise to the surface of the
water to show how much needs to be drained. Also,
some optional fuel filter / water separators are
equipped with a sensor to detect the amount of
contaminants. This sensor sends a signal to an
indicator to alert the operator.
Drain the fuel filter / water separator as follows:
1. Position an approved container under the fuel
filter / water separator (Figure 5-7, (1)) to collect
the contaminants.
Figure 5-7
2. Close (Figure 5-7, (2)) the fuel cock (Figure 5-7,
(3)) .
3. Loosen the drain cock (Figure 5-7, (4)) at the
bottom of the fuel filter / water separator. Drain
any water collected inside.
4. Hand-tighten the drain cock.
CAUTION
If the fuel filter/water separator is positioned
higher than the fuel level in the fuel tank, water
may not drip out when the fuel filter/water
separator drain cock is opened. If this happens,
turn the air vent screw on the top of the fuel
filter/water separator 2-3 turns
counterclockwise.
Be sure to tighten the air vent screw after the
water has drained out.
5. Open the fuel cock (Figure 5-7, (3)) .
6. Be sure to prime the diesel fuel system when you
are finished. See Priming the Fuel System on
page 15.
7. Check for leaks.