Yanmar 4TNV98, Service Manual

Page: 85 / 246

4TNV98 & 4TNE98 Diesel Engine Section 3. Engine 83
Figure 6-38
10. Remove the engine coolant pump. See
Disassembly of Engine Coolant Pump on page
207.
Removal of Valve Cover
NOTE : The high pressure fuel injection lines and
valve cover grommets must be removed prior to
removing the valve cover. See Removal of Fuel
Injectors on page 163.
1. Remove the high-pressure fuel lines.
2. Use a flat-blade screwdriver (Figure 6-39) to
remove the fuel injection line grommets (Figure 6-
40, (1)) from the valve cover (Figure 6-40, (3))
and fuel injectors (Figure 6-40, (2)) . There is a
notch at the 3 o’clock position in the valve cover
opening to insert the screwdriver.
Figure 6-39
3. Remove the valve cover nuts (Figure 6-40, (4)) .
4. Remove the O-ring (Figure 6-40, (5)) on each
valve cover nut.
Figure 6-40
5. Remove the valve cover (Figure 6-40, (3)) .
Discard the valve cover gasket (Figure 6-40, (6)) .
6. Inspect and clean the crankcase breather
assembly. See Inspect Crankcase Breather
System on page 61.