Maintenance Section
-189-
Water Seperator (Diesel Engine
Only) - Check, Drain
4TNV98 Diesel Engine Only
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.
WARNING
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 topic “Priming the Fuel
System – When required”
7. Check for leaks.
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