Yanmar 4TNV98, Service Manual

Page: 210 / 246

4TNV98 & 4TNE98 Diesel Engine Section 5. Cooling System 208
Reassembly of Engine Coolant Pump
1. Reinstall the thermostat (Figure 8-12, (1)) and a
new O-ring.
Figure8-12
2. Reinstall the thermostat cover (Figure 8-12, (2))
and a new gasket. Tighten the thermostat cover
bolts.
3. Reinstall the temperature switch (Figure 8-12,
(3)) and a new gasket (Figure 8-12, (4)) .
Installation of Engine Coolant Pump
1. Position the engine coolant pump on the engine
and install a new gasket. Install a new special O-
ring
(Figure 8-12, (5)) on assembly between the
engine coolant pump and the joint.
CAUTION
Use a new special O-ring between the engine
coolant pump and the joint. Be sure to use the
special O-ring for each engine model. Although
the O-ring dimensions are the same as a
commercially available O-ring, the material is
different.
2. Reinstall the engine coolant pump bolts. Tighten
the bolts.
3. Inspect and reinstall the coolant hoses and the
temperature switch lead wire.
4.
Reinstall the engine coolant pump V-pulley
(Figure 8-13, (1)) , spacer (Figure 8-13, (2))
engine coolant fan (Figure 8-13, (3)) and engine
coolant fan guard (if equipped).
Figure 8-13