Yanmar 4TNV98 Service Manual page 58

Figure 5-14
4. Clean the filter mounting surface and apply a
small amount of diesel fuel to the gasket of the
new fuel filter.
5. Install the new fuel filter. Turn to the right (Figure
5-14, (2)) and hand-tighten it only until it comes
in contact with the mounting surface. Tighten to
14-17 ft·lb (19.6-23.5 N·m; 2.0-2.4kgf·m) or one
additional turn using the filter wrench.
Applicable Fuel Filter Part No.
4TNV98
6. Open the fuel cock of the fuel filter / water
separator.
7. Prime the fuel system. See Priming the Fuel
System on page 15.
8. Check for leaks.
4TNE98 (for D25S-5) Only
Replace the fuel filter at specified intervals to
prevent contaminants from adversely affecting the
diesel fuel flow.
1. Stop the engine and allow it to cool.
2. Close all fuel cocks in fuel line.
3. Disconnect the fuel filter sensor connector
(Figure 5-14a, (1)).
4TNV98 & 4TNE98 Diesel Engine
A408064
56
Figure 5-14a
4. Place an approved container under fuel filter.
5. Carefully open the drain plug (Figure 5-15a, (1))
to drain fuel from the fuel filter.
6. Remove the fuel filter (Figure 5-14a, (2)) by
turning it to the left (Figure 5-14a, (3)). Wipe up
all spilled fuel.
7. Remove the drain plug (Figure 5-15a, (1)) from
the fuel filter (Figure 5-15a, (2)) by turning it to
the left (Figure 5-15a, (3)).
8. Check the condition of the drain plug O-ring
(Figure 5-15a, (4)). Replace the O-ring if
damaged.
Figure 5-15
9. Set the drain plug aside for reinstallation.
Section 2. Periodic Maintenance